RO EP QA SPC 003 01 B Specification Flat Bottom Tanks

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C U P R I N S

1 SCOP.................................................................................................................................................................3

2 STANDARDE SI INSTRUCTIUNI .....................................................................................................................5

3 NOTIUNI DE BAZA ...........................................................................................................................................6

4 FUNDATII ..........................................................................................................................................................7

5 DEFINIREA CAPACITATII................................................................................................................................8

6 PROPRIETATILE PRODUSELOR DEPOZITATE............................................................................................9

7 HSE SI QA/QC ................................................................................................................................................10

8 CERINTE DE INSTALARE..............................................................................................................................11

9 MATERIALE ....................................................................................................................................................12 9.1 CALCULAREA GROSIMILOR SI TOLERANTELE LA COROZIUNE ............................................................................................ 12

10 PROIECTARE .................................................................................................................................................13 10.1 SARCINI EXTERIOARE ................................................................................................................................................. 13 10.2 CONFIGURATIA FUNDULUI REZERVORULUI ..................................................................................................................... 13 10.3 RACORDURI, GURI DE VIZITARE SI ATASAMENTE............................................................................................................. 14 10.4 CONDUCTELE INSTALATE PE REZERVOR........................................................................................................................ 14 10.5 INCALZIREA ............................................................................................................................................................... 15 10.6 CAPACUL FIX ............................................................................................................................................................. 15 10.7 CAPACUL FLOTANT EXTERIOR...................................................................................................................................... 16 10.8 ETANSARILE CAPACELOR FLOTANTE............................................................................................................................. 16 10.9 PLATFORME, SCARI SI SCARI MOBILE ............................................................................................................................ 17 10.10 AERISIREA REZERVOARELOR....................................................................................................................................... 19 10.11 PROTECTIA IMPOTRIVA COROZIUNII .............................................................................................................................. 19 10.12 DEVIERI PERMISE DUPA INSTALARE .............................................................................................................................. 19

11 FABRICAREA, MONTAREA SI INSTALAREA .............................................................................................21 11.1 GENERALITATI DE FABRICARE ..................................................................................................................................... 21 11.2 PREGATIREA MATERIALELOR ....................................................................................................................................... 21 11.3 VERIFICAREA FUNDATIILOR.......................................................................................................................................... 21 11.4 SUDAREA .................................................................................................................................................................. 22 11.5 METODE DE MONTAJ................................................................................................................................................... 22

11.5.1 Asamblarea si sudarea progresiva................................................................................................................. 22 11.5.2 Asamblarea completa urmata de sudarea imbinarilor orizontale .................................................................. 22 11.5.3 Metoda ridicarii cu cricuri............................................................................................................................. 23 11.5.4 Metoda Flotatiei ............................................................................................................................................ 23 11.5.5 Asamblarea in afara santierului..................................................................................................................... 24

11.6 GAURI DE MONTAJ SI ANEXE ........................................................................................................................................ 24 11.7 PLACA DE BAZA, FUNDATİA, ASEZAREA Sİ SUDAREA........................................................................................................ 24 11.8 STABİLİREA STRATULUİ DE FUND AL TABLELOR DE İNVELİT............................................................................................... 25 11.9 VERIFICAREA ALINIAMENTULUI ..................................................................................................................................... 25 11.10 CADRUL CAPACULUI ................................................................................................................................................... 26

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11.11 TOLERANTELE MANTALEI............................................................................................................................................. 27 11.11.1 Verticalitatea mantalei rezervorului .............................................................................................................. 27 11.11.2 Devierea locala de la forma din proiect ........................................................................................................ 27 11.11.3 Tolerantele la imbinarile orizontale si verticale ale mantalei........................................................................ 28 11.11.4 Tolerantele pentru dezalinierea placilor la imbinarile sudate cap-la-cap ...................................................... 28 11.11.5 Partea superioara a mantalei rezervorului ..................................................................................................... 29

11.12 TOLERANTELE CAPACULUI FLOTANT ............................................................................................................................. 29 11.13 RACORDURI SI GURI DE VIZITARE ................................................................................................................................. 29

12 APARATE DE MASURA SI CONTROL .........................................................................................................31

13 ANEXE SUPLIMENTARE PETROM...............................................................................................................35 13.1 SISTEME DE EVACUARE DIN CAPACUL REZERVOARELOR CU CAPAC FLOTANT..................................................................... 35 13.2 ECHIPAMENTELE PENTRU GAZE INERTE PENTRU REZERVOARE CU CAPAC FIX .................................................................... 36 13.3 IZOLATIA TERMICA, MANTAUA SI CAPACUL ..................................................................................................................... 36 13.4 CONEXIUNILE ESAFODAJULUI....................................................................................................................................... 36 13.5 SUPORTI PENTRU CABLURI .......................................................................................................................................... 36 13.6 RACORDUL DE CALIBRARE DE REZERVA PENTRU REZERVOARELE CU CAPAC FLOTANT ........................................................ 36

14 SISTEME DE STROPIRE................................................................................................................................37

15 STINGATOARE CU SPUMA ..........................................................................................................................38

16 INSPECTAREA, TESTAREA SI RECEPTIA..................................................................................................39 16.1 INSPECTIA RADIOGRAFICA ........................................................................................................................................... 39 16.2 TESTAREA HIDROSTATICA ........................................................................................................................................... 39

17 MARCAJUL DE IDENTIFICARE ....................................................................................................................41

18 DOCUMENTATIE ............................................................................................................................................42 18.1 FAZA DE OFERTARE.................................................................................................................................................... 42 18.2 DUPA ATRIBUIREA CONTRACTULUI................................................................................................................................ 42 18.3 DOCUMENTATIA FINALA............................................................................................................................................... 43

19 GARANTII........................................................................................................................................................44

ANEXA 1 – STANDARDE SI REGLEMENTARI.....................................................................................................45

ANNEX 2 – SUMARUL DEFINITIILOR DE AGREEAT INAINTE DE ATRIBUIREA CONTRACTULUI................50

ANEXA 3 – FISA DE DATE A REZERVORULUI ...................................................................................................52

ANEXA 4 – METODE DE MONTARE A REZERVORULUI ....................................................................................68

20 LISTA REVIZIILOR .........................................................................................................................................69

1 Scop

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Acest standard se aplica in cadrul Petrom E&P la constructia si instalarea rezervoarelor verticale si cilindrice, montate in santier sau preasamblate in atelier, cu fund plat si capace fixe (cu sau fara panouri flotante) sau cu capace flotante.

Rezervoarele sunt folosite la stocarea petrolului, a produselor petroliere si a altor produse lichide la o presiune apropiata de presiune atmosferica si la o temperatura de proiectare care sa nu depaseasca 93°C.

Presiunea maxima si vidul pentru care se proiecteaza rezervoarele trebuie definite in conformitate cu cerintele relevante si se gasesc in specificatiile tehnice de solicitare.

Rezervoarele de depozitare cu un singur perete situate deasupra solului trebuie localizate intr-o cuva de retentie. Tipul si capacitatea bazinului trebuiesc definite conform cu cerintele din proiect, dar trebuie luate in considerare si aspectele economice.

Rezervoarele asamblate in atelier in conformitate cu API Standard 650, anexa J sunt acceptate pana la un diametru maxim de 6m.

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2 Standarde si instruct iuni

In legatura cu acest Standard, specificatiile corepunzatoare, standardele si directivele legal aplicabile in Romania sau in tara unde proiectul trebuie executat si certificat in Anexa 1 trebuie sa se ia in considerare in forma lor curenta (ultima revizie).

Acesta lista nu are pretentia de a fi completa .

Daca apar devieri sau/si conflicte intre diferitele specificatii, standarde sau directive si nu exista nicio definitie ferma in acest standard, atunci in fiecare caz se va aplica formularea cea mai stricta.

Acolo unde se exclud reciproc, se aplica legile romanesti in vigoare.

Daca contractorul are retineri in ceea ce priveste o definitie agreata, atunci trebuie sa notifice clientul in scris, fara intarziere.

Contractorul raspunde de verificarea corectitudinii acestui standard pentru scopul destinat. Aplicarea nu il absolva pe contractor de responsabilitatea sa ca specialist si antreprenor independent.

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3 Notiuni de baza

Rezervoarele cu fundul plat trebuie calculate, proiectate si construite conform codurilor de proiectare SR EN 14015 sau API 650, pe masura ce se aduc modificari.

Proiectele si anexele definite in standardele Petrom prezente precum si solicitarea de specificatii de cotare trebuie de asemenea luate in considerare.

Daca contractorul considera ca aceste definitii nu reprezinta solutia cea mai eficienta cu privire la costuri, atunci trebuie sa instiinteze clientul si sa numeasca sisteme alternative.

Toate rezervoarele trebuie construite in conformitate cu codul de proiectare specificat pentru presiunile si temperaturile specificate, si pentru greutatea proprie, sarcinile laterale si toate celelalte sarcini aplicabile specificate in fisa de date a rezervorului, documentele de achizitie si aceasta specificatie.

Orice schimbare trebuie aprobata de catre Client.

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4 Fundati i

Tipul si proiectarea fundatiilor rezervorului trebuie agreate de catre client si contractor.

O expertiza a solului (studiul geologic) precum si conditiile geografice si climatice trebuie luate de asemenea in considerare. Se face referinta la recomandarile din codul de proiectare pentru proiectarea si constructia fundatiilor rezervoarelor de depozitare cu fundul plat.

Calculele trebuie trimise Clientului pentru aprobare.

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5 Definirea capacitat i i

Volumul nominal este capacitatea pentru care trebuie proiectat rezervorul in functie de proprietatile produselor de depozitat.

Acest volum trebuie realizat cand se atinge cel mai inalt nivel proiectat “ HL” al fluidelor de procesare. Pe langa aceasta, trebuie agreat un nivel maxim proiectat “HH” pentru lichide. Mai mult, se aplica insemnarile din Codul de proiectare pentru determinarea capacitatii (volumului).

Volumul, dimensiunile si alte date de proiectare solicitate trebuie definite in fisa de date a rezervoarelor de depozitare. Dimensiunile exacte trebuie determinate pe baza conditiilor locale, disponibile din locatie, si a codurilor si regulamentelor aplicabile.

La selectarea dimensiunilor rezervorului, in mod normal trebuie sa se aleaga cele mai inalte rezervoare compatibile cu sarcina permisibila la sol, fabricarea economica si restrictiile autoritatilor locale.

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6 Proprietat i le produselor depozitate

Toate datele importante pentru produsele de depozitat, cum ar fi: greutatea specifica, temperatura, viscozitatea, etc., trebuie sa fie indicate in solicitarea pentru specificatiile de cotare si in documentatia rezervoarelor.

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7 HSE si QA/QC

Toate activitatile realizate de Contractor cu privire la locul de constructie trebuie sa fie in conformitate cu toate normele, standardele si instructiunile Petrom precum si cu legislatia romaneasca cu privire la cerintele HSE si QA/QC.

Inainte de inceperea lucrarilor, contractorul trebuie sa ii trimita Clientului pentru aprobare Planul de Calitate al Proiectului si Planul de Inspectie si Testare (ITP).

Verificarile si testele QA/QC trebuie sa fie definite in conformitate cu Planul de Inspectie a Calitatii al Petrom si cu Manualul QA.

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8 Cerinte de instalare

In timpul montarii, trebuie sa se furnizeze cabluri de ancorare si alte metode aprobate de catre Client pentru securizarea rezervoarelor de depozitare nefinalizate impotriva vantului. Sistemul de ancorare recomandat este dat mai jos ca notiune de referinta.

Toate racordurile si orificiile trebuie protejate cu flanse oarbe.

Procedura detaliata de instalare a rezervoarelor trebuie trimisa de catre Contractor pentru aprobare inainte de inceperea lucrarilor de instalare.

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9 Materiale

Materialele pentru constructia rezervoarelor trebuie sa fie conforme cu Codul de proiectare corepunzator, daca nu se specifica altfel in fisa de date tehnice a rezervoarelor de depozitare.

Tot otelul trebuie sa fie complet calmat si fabricat cu granulatie fina.

Temperatura minima de proiectare a metalelor trebuie sa fie dupa cum s-a stabilit in fisele de date. Testele de impact trebuie sa se realizeze conform cu cerintele Codului de Proiectare la temperatura minima de proiectare dupa cum s-a stabilit in fisele de date. Toate atasarile permanente sudate ale mantalei trebuie sa fie in conformitate cu aceleasi cerinte de impact ale mantalei.

La mantaua rezervorului sau pe fundul rezervorului nu se vor folosi fitinguri turnate sau alte componente.

Nu se vor folosi materiale fara o evidenta autentica a testelor.

Este interzisa folosirea garniturilor de azbest.

Materialele de sudare trebuie sa respecte specificatiile tehnice de sudura si ale materialelor.

Platformele, scarile, treptele trebuie galvanizate, inclusiv toate consolele si asamblarile cu suruburi.

Vopsirea si materialele de captusire trebuie sa fie conforme cu specificatiile aferente.

9.1 Calcularea grosimilor si tolerantele la coroziune

Grosimea mantalelor si a altor componente sub presiune trebuie calculate dupa cum s-a stabilit in Codul de Proiectare corespunzator. Calculele de proiectare trebuie trimise Clientului impreuna cu schitele Contractorului pentru a fi revizuite.

Tolerantele minime de coroziune interna si externa pentru baza, manta si capac se vor specifica de catre client, pe baza conditiilor anticipate de prestare a serviciilor, din fisa de date a rezervoarelor.

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10 Proiectare

10.1 Sarcini exterioare

Sarcinile datorate vantului trebuie sa fie in conformitate cu Codul de Proiectare, daca nu se specifica altfel in fisa de date. Viteza de baza a vantului si topografia, duritatea si factorii statistici trebuie sa fie definiti in specificatiile proiectului. Calculele pentru grinzile intermediare ale rezervoarelor de depozitare trebuie sa se bazeze pe grosimea nominala a mantalei (dupa cum s-a comandat).

Sarcina seismica trebuie sa fie definita de catre Client pentru locatia in care se vor instala rezervoarele. Calculele seismice trebuie trimise pentru revizuire.

Proiectarea capacului cu sarcina mobila minima si sarcina minima a racordului trebuie sa fie in conformitate cu Codul de priectare aplicabil.

10.2 Configuratia fundului rezervorului

Fundul rezervorului trebuie sa fie concav cu inclinarea din centru catre margini.

Inclinatia podelei trebuie sa fie de 1‰. Fundul rezervorului trebuie sa fie astfel proiectat incat tasarea uniforma si non-uniforma acceptata dintre exteriorul rezervorului si centru sa poata fi compensata.

Placa are o latime de cel putin 2,000 mm si o grosime conforma cu Codul de proiectare aplicabil. Unde este necesar, conform codului, se vor furniza placi rotunde pentru fundul rezervorului.

Placile de baza se vor suda prin suprapunere si evitandu-se subtaierea. Dupa ce operatiunea de sudare s-a finalizat, se vor indeparta toate depunerile datorate sudurii.

Daca podeaua rezervorului trebuie sa fie vopsita (vezi solicitarea pentru specificatiile de cotare), toate marginile placilor de podea trebuie sa fie rotunjite cu o raza de cel putin 3 mm.

Decantarea apei si canalul colector :

• numarul si locatia trebuie specificate de catre client.

• Detaliile pentru conexiunea intre canalul colector si decantarea apei trebuie definite impreuna cu clientul.

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10.3 Racorduri, guri de vizitare si atasamente

Racordurile, gurile de vizitare si alte elemente atasate trebuie proiectate in conformitate cu Codul de proiectare aplicabil si cu prevederile descrise mai jos.

Toate racordurile mantalei cu marimea de 6 inch (DN 150) si mai mari trebuie furnizate cu un suport de consolidare. Consolidarea racordului trebuie sa fie conforma cu Codul de Proiectare.

Toate inelele de intarire ale racordurilor atasate in exterior trebuie perforate si filetate pentru o teava de inspectare de 0.25 inch NPT si sa fie testate cu aer comprimat si pelicula de sapun la o presiune de 1.0 barg.

Este de preferat ca suportii de consolidare sa nu acopere sudura decat daca este absolut inevitabil sau daca aproba clientul. Zona acoperita a racordului plus 100 mm pe fiecare parte trebuie sa fie polizata la fata si radiografiata 100% inainte de montarea suportului.

Numarul si marimea gurilor de vizitare trebuie sa fie conform cu specificatiile din Fisa de date pentru rezervoare de depozitare. In oricare dintre cazuri, marimea mantalei gurilor de vizitare nu trebuie sa fie mai mica de 36” iar marimea trapei de pe capac nu trebuie sa fie mai mica de 24”.

Pentru gurile de vizitare trebuie sa se furnizeze capace cu suruburi, garnituri si macara (davit).

Racordurile trebuie facute din teava fara sudura si in conformitate cu Codul de proiectare aplicabil daca nu se specifica altfel in Codul de proiectare aplicabil cu privire la fisele de date pentru rezervoare.

Racordurile si guri de vizitare fabricate din tabla trebuie sa aiba o singura sudura longitudinala.

Daca mixerele sau alte echipamente trebuie instalate pe mantaua sau capacul rezervorului, marimea gurii de vizitare trebuie determinata in fisa de date. Marimea trebuie verificata si finalizata de catre producatorul echipamentului inainte de proiectul detaliat.

10.4 Conductele instalate pe rezervor

Tevile interioare si exterioare instalate pe rezervor trebuie furnizate, instalate si testate de catre Contractor. Tevile exterioare de pe capacul rezervorului trebuie sa se termine cu un cot cu flansa, 1m deasupra partii superioare a fundatiei rezervorului, daca nu se specifica altfel.

Tevile de incendiu instalate pe rezervor si tevile pentru stratul de gaze, dupa cum se aplica, trebuie sa fie furnizate, instalate si testate de catre Contractor.

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Contractorul trebuie sa furnizeze, sa instaleze si sa testeze echipamentul cu supapa pentru incendiu.

10.5 Incalzirea

Daca incalzirea rezervorului este necesara pentru specificatiile de cotare, aceasta trebuie sa fie in conformitate cu fisele de date, cerintele si specificatiile proiectului.

Contractorul trebuie sa masoare si sa furnizeze tevile pentru incalzirea interioara. Tevile vor fi proiectate, instalate si verificate in conformitate cu SR EN 13480.

10.6 Capacul fix

Forma necesara pentru capac trebuie sa se gaseasca in solicitarea pentru specificatiile cotate:

- capacul cu bolta autosustinuta si cu grinzi (raza de curbura = 1.5 x diametrul rezervorului)

-capac conic autosustinut cu grinzi. Inclinarea acestuia trebuie sa fie 15 grade ( + 3 grade).

- consola fara grinzi

Capacele fixe pentru rezervoare trebuie sa fie in conformitate cu Codul de proiectare aplicabil si cu subsectiunile aferente.

Rezervoarele care trebuie sa fie complet vopsite in interior sau acoperite cu fibra de sticla sau alt tip de acoperire anticoroziva trebuie sa aiba racordurile interioare sudate continuu cu colturile si marginile ascutite rotunjite.

Contractorul trebuie sa furnizeze o aerisire de urgenta si o aerisire corespunzatoare montata pe capac acolo unde capacul, datorita imbinarii cu mantaua nu poate fi fragil.

Suprapunerea elementelor capacului trebuie sa permita autoevacuarea apei de ploaie pentru a se evita coroziunea externa.

Echipamentul de ventilare trebuie sa fie in conformitate cu standarde internationale recunoscute si trebuie sa aiba conexiuni cu flansa cu suruburi. Orificiile de ventilare deschise trebuie sa contina ecrane si sa fie protejate fata de conditiile climaterice. Numarul, marimea si tipul orificiilor de ventilare trebuie sa se specifice in fisele de date. Daca nu, contractorul trebuie sa efectueze calculele necesare ventilarii si sa le trimita pentru aprobare.

In functie de fluidul din rezervor pentru aplicatiile cu blanketing se prevad dispozitive specifice.

Capace flotante interioare:

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Capacele flotante interioare trebuie proiectate conform cu Codul de proiectare aplicabil si cu sectiunile aferente.

Capacele flotante trebuie sa poata elimina cel putin 95% din emisia de hidrocarburi care ar putea sa se produca in absenta capacului flotant.

Capacele flotante trebuie proiectate sa functioneze la cel mai mic nivel permis de componentele interne ale rezervorului, daca nu se specifica altfel in fisele de date ale rezervoarelor de depozitare.

Capacele flotante trebuie sa fie prevazute cu suporti ajustabili, proiectati astfel incat sa poata fi ajustati de la partea superioara a capacului flotant interior. Pozitia suportilor trebuie sa aiba un spatiu de 1.5m intre portiunea inferioara a capacului si podeaua rezervorului.

Materialele de etansare ale capacelor flotante trebuie sa fie din punct de vedere chimic compatibile cu produsul.

Capacele flotante trebuie sa fie prevazute cu trape de acces, evacuare de urgenta direct in produsul depozitat precum si un dispozitiv de etalonare si prelevare probe.

10.7 Capacul flotant exterior

Capacele flotante exterioare trebuie sa fie conform cu prevederile Codului de proiectare aplicabil.

Daca nu se stabileste altfel, trebuie sa se furnizeze o scara mobila impreuna cu capacul flotant care se va ajusta automat la orice pozitie a capacului pentru a permite accesul la capac. Trebuie sa se urmeze API 650 C.3.7.

10.8 Etansarile capacelor flotante

Selectarea etansarilor trebuie sa fie specifica rezervoarelor. Producatorul de dispozitive de etansare trebuie sa confirme ca acestea indeplinesc criteriile necesare si cerintele reglementare.

Viton (FPM) si Teflon (PTFE) sunt materialele de etansare preferate deoarece rezista la hidrocarburi si la razele UV si au proprietati de intarziere a focului. Nu se prefera etansarile cu spuma.

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10.9 Platforme, scari si scari mobile

Contractorul trebuie sa furnizeze platforme exterioare sudate din otel precum si scari exterioare catre partea superioara a rezervorului si catre orice platforme instalate pe manta conform indicatiilor din fisa de date pentru rezervoare.

Proiectare

Proiectele trebuie sa se bazeze pe standardele Petrom in structurile metalice. Atasamentele de pe mantaua si capacul nu trebuie sudate direct pe placile rezervorului, ci pe placute de egalizare potrivite.

Platformele, coridoarele circulare si scarile trebuie sa fie conform cu desenele standard de proiectare.

Scarile exterioare trebuie sa fie protejate cu carcasa si trebuie sa porneasca de la nivelul solului pana la 1000mm deasupra nivelului platformei sau capacului.

Platformele trebuie sa aiba o latime minima de 900 mm.

Grinzile pentru vant care de asemenea servesc si pe post de coridoare circulare trebuie proiectate pentru sarcini suplimentare datorita personalului.

Scari exterioare

Toate rezervoarele trebuie echipate cu scari exterioare tangentiale pana la capac daca rezervorul are capac fix si pana la galeria superioara daca are capac flotant. Latimea interioara trebuie sa fie de cel putin 800 mm.

Daca rezervoarele au izolatie exterioara, scarile exterioare trebuie sa fie la aceeasi distanta de mantaua rezervorului ca si grosimea izolatiei data in solicitarea pentru specificatiile de cotare plus 50 mm.

La nivelul limitei superioare al scarilor exterioare si al iesirilor de siguranta, trebuie sa se furnizeze o platforma care leaga limita superioara de coridorul circular dupa cum specifica autoritatile.

Contravantuirea rezervoarelor cu capac flotant

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Contravantuirea trebuie sa fie astfel proiectata incat sa se poata folosi ca o galerie pentru partea superioara cu o latime interioara de cel putin 800 mm. Un intinzator de cablu pentru gondola (pentru o sarcina aplicata in punct de10 kN ) trebuie prevazut in jurul intregii circumferinte exterioare a consolidarii.

Scarile de incendiu

Daca circumferinta rezervorului este mai mare de 50 m, trebuie sa se amplaseze o scara de siguranta pe partea opusa scarilor.

Din motive de siguranta, o bara de siguranta (protectie impotriva caderii) trebuie sa fie amplasata pe partea superiora a scarii de siguranta.

Platforme intermediare

Scarile exterioare si scarile de siguranta trebuie echipate cu platforme intermediare. Aceste platforme trebuie amplasate la cel putin fiecare 20 de trepte si la cel putin fiecare 10m (inaltime) pe scarile de siguranta.

Scari mobile pentru rezervoare cu capac flotant

Trebuie sa se asigure o scara mobila cu o latime minima de 600 mm si o bara de siguranta (protectie impotriva caderii), de la marginea mantalei pana la coridorul circular de pe capac.

Treptele scarii trebuie proiectate astfel incat sa fie ca un paralelogram sau un arc in asa fel incat sa ramana orizontale indiferent de pozitia scarii.

Structura de pe capacul flotant care sustine scara mobila trebuie sa fie amplasata sau sustinuta pe capac (nicio legatura cu chesonul permisibil).

Scarile mobile trebuie impamantate.

Balustrada care margineste capacul de pe rezervoarele cu capac fix

Fiecare rezervor trebuie sa aiba capacul marginit de o balustrada.

Dispozitivul de ridicare

Dispozitivul de ridicare trebuie furnizat in pozitie corespunzatoare sau pe un suport de troliu in jurul intregii circumferinte a rezervorului pentru instalarea si indepartarea echipamentelor (cum ar fi: aparate de masura si control, supape de ventilatie, mixere, etc). Tipul dispozitivului de ridicare trebuie agreat impreuna cu clientul.

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Unde este posibila folosirea macaralei, se poate renunta la dispozitivul de ridicare.

10.10 Aerisirea rezervoarelor

Aerisirea rezervoarelor trebuie proiectata conform cu Codul de proiectare aplicabil si cu cerintele API.

Calculele de ventilare trebuie trimise Clientului pentru a fi revizuite.

10.11 Protectia impotriva coroziunii

In functie de contractul dintre client si contractor, protectia catodica a rezervorului se poate gasi in obiectivul contractorului sau se poate realiza de furnizorul de protectie catodica. In orice caz, este necesara consultarea producatorului de protectie catodica pentru a se realiza o protectie catodica sigura.

O exceptie o constituie piesele rezervorului care nu mai sunt accesibile de indata ce s-a finalizat instalarea. Contractorul trebuie sa consulte clientul si sa aplice protectia de coroziune pe aceste zone in timpul instalatiei.

API 651 trebuie folosit ca ghid pentru protectia catodica a rezervoarelor.

Protectia catodica exterioara este aferenta tipului de fundatie si protectiei solului. Aceste criterii trebuie de asemenea luate in considerare.

In orice caz, design-ul protectiei catodice trebuie aprobata inainte sa se inceapa instalarea rezervorului.

10.12 Devieri permise dupa instalare

Pozitia verticala

- a tevii pentru indicatorul de nivel

- a axului sectiunii transversale a senzorului de temperatura

- a dispozitivului de calibrare (capac) fata de axul platformei. Devierea maxima de la verticala poate fi:

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Inaltimea rezervorului pana la 14 m........... .. 3 mm De la 14 m pana la 16 m…. 4 mm De la 16 m pana la 20 m…. 5 mm peste 20 m ...............……….6 mm

Tolerante:

Tolerantele dimensionale ale rezervoarelor trebuie sa fie in conformitate cu Codul de proiectare aplicabil pentru functionarea corespunzatoare.

Inspectie

Pozitiile verticale trebuie verificate dupa umplerea rezervorului cu apa si daca se observa vreo deviere, teava suport pentru indicatorul de nivel trebuie sa fie reajustata.

Trebuie sa se verifice racordurile, scarile si toate celelalte instalatii.

Verificarea trebuie facuta pentru a se asigura ca depunerile de la sudura au fost indepartate de pe barele de ghidaj, de pe componentele esafodajului de schelarie, etc. Cand se folosesc senzori de temperatura (rezervoare cu capac flotant), cadrul nu trebuie sa se sudeze de platforma decat dupa ce rezervorul a fost golit de apa.

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11 Fabricarea, montarea si instalarea

11.1 Generalitati de fabricare

Fabricarea care implica sudura nu trebuie sa fie subcontractata fara acordul anterior in scris din partea clientului.

Fabricarea include alcatuirea planului (fundatia), montarea, sudarea fundului inelar al rezervorului si membranei conform cu schema de montaj, testarea sudurilor mantalei rezervorului si accesoriilor, sudarea tablelor ce alcatuiesc capacul, accesoriile capacului, tevile interioare si exterioare pana la limita flansei racordului rezervorului, sudarea si inspectia scarilor, grinzile pentru rigidizare, rigidizarea mantalei si accesoriile.

11.2 Pregatirea materialelor

Toate materialele trebuie examinate si reparate daca este necesar inainte de a fi montate, pentru a se asigura ca orice defect este identificat si reparat.

11.3 Verificarea fundatiilor

Inainte receptiei fundatiei, contractorul trebuie sa realizeze o inspectie detaliata a acesteia si sa prezinte clientului constatarile.

Contractorul trebuie sa inspecteze si sa verifice orizontalitatea si profilul inainte de inceperea lucrarilor si sa notifice clientul si producatorul de fundatii in legatura cu orice deficienta care necesita rectificare.

In timpul construirii rezervorului, contractorul trebuie sa evite contaminarea cu materiale straine care pot provoca accelerarea coroziunii fundului rezervorului.

Contractorul trebuie sa mentina calitatea materialelor in adevaratul profil si fara materiale straine, cum ar fi: argila, carbune, zgura, deseuri de metal, sau materii vegetale, si trebuie sa repare fundatia sau suprafata avariata daca acest lucru a fost provocat de actiunile sale.

Daca se convine reciproc ca este nevoie de actiuni corective in conformitate cu cerintele, un asemenea acord trebuie supus aprobarii clientului.

Lucrarile sau materialele suplimentare necesare pentru restabilirea finisajului stratului granular de montare, dupa receptia fundatiei si predarea catre contractor, trebuie furnizate de catre contractor fara costuri suplimentare pentru client.

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Avarierea mantalei sau a axului central provocata de Producator in timpul operatiunilor la rezervor trebuie corectata de catre contractor intr-o maniera acceptata de client si fara costuri suplimentare pentru client.

11.4 Sudarea

Toate procedurile de sudura, omologarea procedeelor, autorizarea sudorilor si a operatorilor de sudura trebuie sa se faca in conformitate cu Codul ASME, Sectiunea IX, sau standarde de referinta EN aferente, specificatii de sudare ale proiectului.

Specificatiile procedurii de sudura si evidentele de autorizare a procedurii trebuie trimise pentru revizuire inainte de inceperea fabricatiei.

Sudarea nu va fi permisa cand suprafetele de sudat sunt umede, acoperite cu gheata sau in timpul perioadelor cu vant puternic daca nu se asigura incalzire si protectie adecvata.

La fabricare si montare trebuie sa se foloseasca numai sudori autorizati. Contractorul trebuie sa trimita, atunci cand i se solicita, o lista cu sudorii autorizati si cu procesele pentru care au fost autorizati.

11.5 Metode de montaj

Rezervoarele verticale sudate se pot monta in mai multe feluri; nu se specifica folosirea niciunui sistem unic de procedura de montaj.

Metoda de montaj trebuie aprobata de catre Companie.

Metodele de montaj cele mai cunoscute sunt descrise mai jos:

11.5.1 Asamblarea si sudarea progresiva

In metoda progresiva de asamblare, mai intai se asambleaza si se sudeaza tablele de la fundul rezervorului. Apoi se monteaza virolele circulare, se fixeaza, se prind si se sudeaza complet. Asta se face pas cu pas, lucrandu-se in sus pana catre partea superiorara. Nu se va trece la efectuarea unei etape pana cand etapa anterioara nu a fost sudata in intregime.

Apoi urmeaza montajul si finalizarea cadrului capacului si a placilor capacului (vezi Anexa 4).

11.5.2 Asamblarea completa urmata de sudarea imbinarilor orizontale

In metoda asamblarii complete, mai intai se asambleaza si se sudeaza placile de fund. Apoi se monteaza virolele circulare se fixeaza, se prind si se sudeaza complet numai

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cordoanele verticale, lasandu-se cordoanele orizontale nesudate. Asta se face poas cu pas, lucrandu-se in sus pana la unchiul superior. Nu se va trece la efectuarea altei etape pana cand etapa anterioara nu a fost complet sudata.

Apoi urmeaza montarea si finalizarea cadrului capacului si a placilor capacului.

In cele din urma se sudeaza cordoanele orizontale, lucrandu-se in sus pornind de la partea de jos catre unghiul superior. Vezi Anexa 4.

11.5.3 Metoda ridicarii cu cricuri

Unii contractori folosesc un sistem de montaj in care tablele de fund sunt finalizate, virolele circulare sunt montate pe tablele de fundatie, cadrul capacului si virolele circulare sunt finalizate si apoi se asambleaza in jurul structurii un numar de cricuri. Cu ajutorul acestor cricuri, virolele superioare finalizate impreuna cu capacul si virolelor sunt ridicate la o inaltime suficienta ca sa se insereze urmatorul strat de jos. Metoda cu cricuri si sustinerea mantalei partial montate nu trebuie sa aiba efecte adverse asupra circularitatii mantalei.

Sudarea este finalizata la fiecare etapa de ridicare pana cand s-au inserat toate virolele circulare si s-a atins inaltimea finala.

Operatiunea finala este sudarea stratului de la baza pana la placile de fundatie. Vezi Anexa 4.

11.5.4 Metoda Flotatiei

Metoda flotatiei se foloseste la rezervoarele cu capac flotant. Dupa finalizarea tablelor de fund si dupa montarea si sudarea celor doua randuri de virole circulare inferioare ale rezervorului, capacul flotant este asamblat pe fundul rezervorului si finalizat. Rezervorul este apoi umplut cu apa si, folosind capacul flotant ca platforma de lucru, dupa montarea celui de-al treilea rand de virole apa este pompata inauntru pe masura ce se finalizeaza fiecare virola.

Sunt necesare verificari regulate ale aliniamentului vertical si ale circularitatii pentru a se asigura conformitatea cu (11.9) si (11.11).

Aceasta metoda se poate folosi numai in locatii unde sedimentarea solului este foarte limitata si cu acordul Clientului. Trebuie sa se ia in considerare sedimentarile de sol prognozate in raportul de investigare a solului.

O macara mica se monteaza de obicei pe capacul flotant pentru ridicarea tablelor de invelit in pozitie. Vezi Anexa 4.

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In zonele cu vanturi puternice metoda flotatiei reprezinta o metoda buna de protectie fata de prabusirea mantalelor rezervorului datorata efectului rafalelor de vant din timpul constructiei. Din acest motiv, metoda flotatiei ar putea fi folosita intr-o versiune modificata pentru montarea rezervoarelor cu capac fix, cu conditia ca procedura de montare sa fie trimisa de catre contractor catre Companiei pentru a fi aprobata.

11.5.5 Asamblarea in afara santierului

Aceasta metoda se poate folosi numai cu acordul Companiei; este potrivita pentru locatiile cu risc si/sau locatiile din apropierea rezervoarelor existente care deja depoziteaza produse usoare. Rezervoarele pot fi prefabricate si mutate in locatia permanenta, in urmatoarele feluri:

- Asamblarea rezervorului in atelierul de lucru. Dimensiunile maxime depind de posibilitati si de limitarile cu privire la transport. In general aceasta metoda trebuie sa se limiteze la rezervoare cu diametre de pana la 12 metri.

- Asamblarea rezervorului pe o fundatie temporara intr-o locatie sigura din apropiere. Rezervorul finalizat este apoi mutat catre fundatia sa permanenta cu macaraua, pe rotile sau cu perna de aer.

Testarea hidrostatica se va face atunci cand rezervorul sta pe fundatia sa permanenta.

11.6 Gauri de montaj si anexe

Nu se vor face gauri in tabla pentru a ajuta la montaj.

Consolele, bucsele, clemele si alte dispozitive care ajuta la montaj, se pot atasa la placile rezervorului prin sudare, dar toate aceste atasari necesare numai pentru montaj trebuie indepartate in cele din urma si orice proiectii din metal de sudura care raman trebuie sa fie indepartate cu grija.

Virolele si tablele capacului si fundului nu trebuie sa prezinte crestaturi, deformari, smulgeri de material etc. atunci cand se indeparteaza atasamentele, si orice defecte provocate trebuie sa fie reparate si inspectate.

11.7 Placa de baza, fundatia, asezarea si sudarea

Tablele inelare trebuie localizate si amplasate dupa masurarea si marcarea razei exterioare si imbinarile cap-la-cap ale placilor inelare, care sunt masurate din punctul central al rezervorului stabilit pe fundatie.

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Raza exterioara a tablelor inelare va fi marita cu 20mm de la dimensiunea aratata in proiect pentru a compensa contractarea prin sudura a placii inelare fata de sudura in colt a placilor de invelit. Cresterea razei se bazeaza pe cele mai bune practici industriale si este folosita cu succes de catre toti constructorii de rezervoare din intreaga lume.

Imbinarile trebuie stabilite in conformitate cu proiectul detaliat si centrat folosind placi cheie si bare subtiri apoi trebuie sudat din exterior pentru aproximativ 250mm, lasandu-se restul din imbinarea cap-la-cap nesudata pentru a permite ingustarea sudurii in timp ce imbinarea de colt este sudata.

Examinarea radiografica a 50 % din imbinarile cap-la-cap ale placilor inelare trebuie realizate la marginea exterioara a imbinarii din zona unde tabla de invelit a rezervorului si placa inelara se intersecteaza inainte de montajul primei table inelare de invelit a rezervorului.

Tablele de fundatie trebuie aranjate si amplasate in conformitate cu succesiunea detaliata in proiectul de aranjare a placilor de fundatie ale rezervorului.

Latimea fiecarei imbinari prin suprapunere a placilor de fundatie trebuie marita cu 5mm fata de cea prezentata in proiect pentru a compensa contractarea prin sudura.

11.8 Stabilirea stratului de fund al tablelor de invelit

Cand se stabileste stratul de fund al placilor de invelit, trebuie sa se ia in considerare toleranta pentru contractarea imbinarilor din timpul sudarii. In timp ce placile sunt plumbuite si se verifica circularitatea, si inainte ca acestea sa fie sudate de fundatie, trebuie sa fie fixate in pozitie cu cleme de metal sau cu alte dispozitive atasate placilor de fundatie.

11.9 Verificarea aliniamentului

Inainte sa se inceapa sudarea stratului final la tablele fundului, trebuie sa se faca o verificare pentru a se asigura ca aliniamentul placilor si latimea spatiului dintre ele sunt corecte, si ca orice probleme care apar dupa sudare se afla in cadrul tolerantelor stabilite mai jos. Daca se asteapta ca tolerantele sa fie depasite, placile vor fi realiniate inainte de inceperea sudarii finale. Trebuie sa se aiba grija la minimizarea lipsei de circularitate sau la distorsionarea dintre partea superioara si cea inferioara a mantalei rezervorului, daca se datoreaza sudarii sau este din alta cauza. Nu se permite rectificarea prin taierea virolelor circulare.

Dupa ce primul strat a fost montat si sudat, raza interioara masurata orizontal de la centrul rezervorului catre orice punct din interiorul mantalei rezervorului, nu trebuie sa varieze de laraza interioara nominala prin mai mult decat urmatoarele:

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Diametrul rezervorului (m)

Devierea maxima de la raza nominala interioara (mm)

≤ 12.5 13

> 12.5 ≤ 45 19

> 45 25

11.10 Cadrul capacului

Inainte sa inceapa montarea cadrului capacului, trebuie sa se verifice ca mantaua rezervorului sa nu contina denivelari, si orice abateri de la aliniament ale partii superioare ale mantalei trebuie corectate inainte ca partile componente ale capacului sa se pozitioneze.

Suportii temporari pentru montajul cadrului acoperisului nu trebuie indepartati pana cand montajul cadrului principal si secundar nu este finalizat. In cazul capacelor cu bolta, suportul central temporar nu trebuie indepartat pana cand grinzile radiale, penele si consolidarile nu sunt montate, finalizate si sudate si pana cand toate straturile capacului nu sunt fixate si sudate in pozitia corespunzatoare. Pozitionarea grinzilor cu zabrele ale capacului trebuie sa se faca cu mare precizie pentru a se evita dezalinierea.

Cand se asambleaza tablele capacului pe cadru, trebuie sa se evite sarcinile excesive asimetrice si nu se vor monta mai mult de trei table intr-un singur punct.

In cazul capacelor cu bolta, placile capacului trebuie asamblate simetric, lucrandu-se din centru catre exterior.

Rezistenta stalpilor de montaj folositi pentru sustinerea temporara a structurii capacului trebuie verificata prin calcularea sarcinii maxime care trebuie sustinuta.

In mod special se va verifica rezistenta la deformare. Contractorul responsabil cu montajul trebuie sa calculeze rezistenta si siguranta stalpilor de montaj care trebuie folositi.

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11.11 Tolerantele mantalei

11.11.1 Verticalitatea mantalei rezervorului

Dupa finalizare, mantaua nu trebuie sa se deplaseze de la verticala cu mai mult de:

Diametrul rezervorului

(m)

Devierea maxima de la verticala

≤ 12.5 1 in 400

> 12.5 ≤ 30 1 in 350

> 30 ≤ 45 1 in 300

> 45 1 in 250

Aceste tolerante se aplica la mantaua rezervorului ca intreg si trebuie folosite ca un ghid pentru fiecare strat individual.

11.11.2 Devierea locala de la forma din proiect

In cazul mantalei, devierea locala de la forma din proiect (in plan orizontal si vertical) nu trebuie sa depaseasca urmatoarele cand este masurata pe o lungime de baza de 2.5 m distanta de imbinarile de sudura:

Grosimea placii (mm)

Devierea maxima locala de la forma din proiect (mm)

≤ 12.5 16

> 12.5 ≤ 25 13

> 25 10

Asemenea devieri de la forma din proiect trebuie sa se faca treptat pe lungimea de baza, fara a se produce schimbari mari ale formei.

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11.11.3 Tolerantele la imbinarile orizontale si verticale ale mantalei

La imbinarile orizontale si verticale ale mantalei, profilul mantalei nu trebuie sa devieze de la forma din proiect cu mai mult decat urmatoarele, masurat pe o lungime de baza de 1 m:

Grosimea placii (mm)

Devierea maxima de la profilul mantalei la cusaturile de sudura (mm)

≤12.5 10

> 12.5 ≤ 25 8

> 25 6

11.11.4 Tolerantele pentru dezalinierea placilor la imbinarile sudate cap-la-cap

Placile de imbinat prin sudura cap-la-cap trebuie potrivite exact si pastrate in pozitie in timpul operatiunii de sudura. Dezalinierea liniei centrale a placilor nu trebuie sa depaseasca urmatoarele:

Grosimea placii, t (mm)

Dezalinierea maxima (mm), oricare este mai mica

Imbinari verticale

finalizate

≤ 19 0.1 t 1.5

> 19 0.1 t 3.0

Imbinari orizontale

finalizate

≤ 8 (placa

superioara)

0.2 t 1.5

> 8 (placa

superioara)

0.2 t 3.0

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11.11.5 Partea superioara a mantalei rezervorului

Mantaua rezervorului trebuie verificata din punctul de vedere al circularitatii, dimensiunilor si nivelului inainte de consolidarile contra vantului si de elementele componente ale capacului (rezervor cu capac fix) sau inainte ca grinzile secundare si primare pentru vant sa fie montate. (rezervor cu capac flotant).

11.12 Tolerantele capacului flotant

Diferentele de spatiu dintre mantaua si periferia capacului la terminarea montajului capacului nu trebuie sa depaseasca ± 13 mm de la distanta nominala.

La orice ridicare a capacului, alta decat cea la care a fost montat, aceasta diferenta de distanta nominala nu trebuie sa depaseasca ± 50 mm daca nu s-a agreeat o valoare diferita cu Compania pentru un anumit tip de etansare.

11.13 Racorduri si guri de vizitare

Racordurile si gurile de vizitare ale rezervorului trebuie instalate pe masura ce continua lucrarile de montare a virolelor. Inelele de intarire si elementele de consolidare trebuiesc instalate si atasate la gurile de vizitare si a racordurilor pe manta reducand distorsionarea sudurii in zona. (vezi Fig 8 –a detaliata mai jos)

Sudura se executa cu o secventa de sudura pe care contractorul a prezentat-o anterior pentru a produce o forma acceptabila in cadrul tolerantelor.

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12 Aparate de masura si control

Dotarea rezervorului cu mijloace de masurat trebuie sa se faca conform cu specificatiile din fisele de date tehnice, specificatiile proiectului, si schemei tehnologice (P&ID).

In mod normal aparatele de masura si control nu sunt incluse in obiectivul producatorului de rezervoare, cu toate acestea ele se vor agrea intre contractor si client.

Urmatoarele informatii se vor folosi ca ghid pentru aparatele de masura si control.

Dispozitive pentru determinarea nivelului lichidelor

Daca nu se specifica altfel in specificatiile tehnice pentru etalonare (calibrare) , trebuie sa se instaleze urmatoarele dispozitive pentru determinarea nivelului continutului rezervorului:

Masurarea manuala sau prelevarea de probe la rezervoarele cu capac fix.

Cand se selecteaza tipul si materialele pentru dispozitivele de masurare sau de prelevare probe, trebuie sa se asigure ca producerea de scantei datorate incarcarii electrostatice este evitata.

Indicatorii manuali de nivel pentru rezervoarele cu capac flotant

Tubul de ghidare furnizat in DN 200 (8”) trebuie sa fie prevazut cu un dispozitiv de masurare (flotant).

Acest tub de ghidare trebuie, de asemenea, sa fie potrivit pentru prelevarea de probe.

Cand se selecteaza tipul si materialele, trebuie sa se asigure in special ca acestea sunt antiscantei (descarcarea sarcinii electrostatice este evitata).

Indicarea automata a nivelului (indicatorul nivelului de lichid).

Daca se afirma in specificatiile tehnice, contractorul trebuie sa furnizeze un dispozitiv de masurare corespunzator. Tipul si instalarea acestuia trebuie agreate impreuna cu clientul.

Racordul pentru masurarea nivelului maxim

Pentru masurarea nivelului maxim de lichid, se va monta un racord de lungime mica pe platforma cu dispozitivul de masurare a temperaturii pentru rezervoarele cu capac flotant si direct pe capac pentru rezervoarele cu capac fix. Locatia sa si/sau dimensiunile trebuie agreate impreuna cu clientul.

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Echipamentul de masurare a temperaturii.

Acesta include urmatoarele dispozitive:

Afisarea automata a temperaturii

- Un racord pe capac pentru rezervoarele cu capac fix

- Pentru rezervoarele cu capac flotant, un racord pe capacul flotant, incluzand o platforma de acces care potrivit proiectului se afla spre interiorul rezervorului.

- racordurile de masurare a temperaturii vor fi DN 25 (1”)

Proiectarea si amplasarea racordurilor trebuie agreata impreuna cu clientul si trebuie indicata in fisele de date si in desene.

Dispozitve de evacuare a presiunii si racordurile pentru gaze inerte pentru rezervoarele cu capac fix

Racordurile pentru dispozitivele de evacuare a presiunii vor fi DN 25. Amplasarea lor se va agrea impreuna cu clientul.

Echipamentul de prelevare

Trebuie sa se furnizeze urmatorul echipament pentru prelevare probe la rezervoarele cu capac flotant.

Doua racorduri de prelevare DN 150 (6”) (inclusiv protectiile) se vor amplasa in membrana capacului pentru prelevarea de probe.

Primul racord se va localiza aproximativ in mijlocul rezervorului cu al doilea la aproximativ jumatate de raza. Se vor instala in asa fel incat sa poata fi operate de pe scara.

Urmatoarele echipamente sunt necesare pentru rezervoarele cu capac fix conform solicitarii pentru specificatiile de cotare:

- Pentru rezervoarele fara echipamente pentru gaze inerte, se va furniza un racord de prelevare din DN 150 (6”) inclusiv protectia.

- Pentru rezervoarele cu echipamente pentru gaze inerte, se va folosi pentru prelevare un dispozitiv antideflagrant etans la gaze. Se va instala in asa fel incat pe

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timpul prelevarii sa se impiedice pierderea de gaze inerte din perna de gaze localizata deasupra de zona medie. Etansarea si functionarea dispozitivului nu trebuie afectate de condens sau inghet.

- Racordurile de prelevare trebuie amplasate pe perete dupa cum s-a agreat cu clientul. Sub racorduri se va amplasa o tava pentru capturarea picaturilor care se evacueaza in sistemul de scurgere. Tava pentru capturarea picaturilor trebuie amplasata la o distanta destul de mare sub robinetii de prelevare pentru a putea fi luate folosind sticle de prelevare de un litru.

Dispozitivul de prelevare cu teava pivotanta de pe rezervoarele cu capac fix

Conform solicitarii pentru specificatiile de cotare, se va furniza o teava pivotanta cu dimensiunile corespunzatoare pentru racordul de prelevare. Racordul de prelevare se va fixa in interiorul si exteriorul rezervorului cu patru gusee la 90 de grade unul de cealalt.

Ghidajul pentru cablu atasat de capac trebuie sa fie etans la gaze si usor accesibil de pe capac.

Trebuie sa se foloseasca un indicator (atasat cablurilor) pe stalp (bara lata de cel putin 300 x 3 mm) pentru a indica pozitia axului de rotatie tubului.

Stalpul trebuie sa fie alb iar indicatorul rosu.

Calibrarea rezervorului

Pentru calibrarea oficiala a rezervorului trebuie sa se indeplineasca urmatoarele cerinte:

Racord de calibrare (indicator de nivel manual)

Racordul de calibrare trebuie sa iasa in afara cu cel putin 800 mm peste capacul rezervoarelor cu capac fix si peste platforma din punctul de calibrare de pe rezervoarele cu capac flotant.

Pe racord trebuie sa existe un semn de calibrare. Acest semn este o bara lata din otel inoxidabil amplasata pe partea ingusta si care este sudata in racordul de calibrare ca o centura. Latura ei superioara trebuie sa fie ascutita si orizontala, iesind in afara cu 3 mm peste latura superioara a tevii.

Punctul de referinta pentru calibrare este punctul unde dispozitivul vertical de calibrare se intersecteaza cu latura superioara orizontala a dispozitivului de calibrare sau cu un plan paralel cu cel unde se afla latura superioara a semnului de calibrare.

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Chiar daca rezervorul este umplut la nivele diferite si ca urmare mantaua si podeaua sunt deformate, pozitia punctului de referinta nu trebuie sa se schimbe, devenind verticala. Racordul de calibrare trebuie amplasat pe o parte stabila a capacului unde nu se pot produce schimbari in pozitia verticala a punctului de referinta, chiar daca se merge pe acoperis (Racordul de calibrare fixata de o consola pe peretele rezervorului).

Racordul de calibrare trebuie sa fie atat de accesibil incat observatorul sa poata selecta o locatie pentru calibrare si sa poata cobori o fasie prin racordul de calibrare in rezervor fara nicio obstructionare. In timpul procesului, semnul de calibrare trebuie sa fie localizat pe latura racordului de calibrare la distanta de operator.

Protectia racordului de calibrare trebuie proiectata astfel incat racordul de calibrare sa poata fi inchis etans fara sa se apese pe semnul de inclinare. Sub marginea superioara, se va suda un suport de teava unde se va atasa placa de calibrare si greutatile si placa pentru locatia de calibrare a Serviciului Masuratori. Suportul nu este necesar daca racordul de inclinare este amplasat in interiorul unei casete unde placile se pot atasa pe partea exterioara.

Nu se pot instala alte componente in verticala de sub racordul de inclinare.

Platforma de inclinare trebuie sa fie uniforma si ajustabila in plan orizontal. Trebuie sa fie posibila protejarea cu un dispozitiv de etansare.

Verificarea gradientului (racord de inclinare de rezerva)

Rezervoarele trebuie sa fie echipate cu un dispozitiv de verificare a gradientului sub forma de racord de calibrare amplasat in diagonala fata in fata cu racordul de inclinare.

Racordul de calibrare trebuie sa fie astfel amplasat incat pozitia sa verticala sa nu poata fi schimbata prin deformarea mantalei rezervorului sau daca se merge pe capac. Nu trebuie sa se instaleze parti componente pe verticala de sub racordul de calibrare.

Piesa de calibrare trebuie proiectata mai mult sau mai putin ca piesa de inclinare, dar semnul de masurare nu este neaparat necesar si latura superioara a tevii trebuie sa fie taiata orizontal si trebuie sa poata fi inchisa cu o flansa oarba.

Piesa de calibrare pentru verificarea inaltimii capacelor flotante

Pentru verificarea inaltimii capacelor flotante, se vor suda in jurul circumferintei capacului cel putin patru racorduri de inspectare (cu diametrul de 2"-3") cu o bresa de inchidere. Aceste tevi trebuie amplasate cat mai aproape posibil de latura capacului flotant si distribuite uniform.

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13 Anexe supl imentare PETROM

13.1 Sisteme de evacuare din capacul rezervoarelor cu capac flotant

Trebuie sa se amplaseze un sistem de evacuare de o marime potrivita pentru nivele de precipitatii locale. Se vor instala unul sau mai multe sisteme de evacuare, in functie de marimea capacului flotant.

Daca sunt prevazute si coturile de conducte, trebuie sa se foloseasca etansari rezistente si lubrefianti potriviti.

Tipul si instalarea robinetului de evacuare din capac trebuie agreate impreuna cu clientul.

Verificarea etanseitatii sistemului de evacuare din capac

Toate coturile vor fi inspectate de catre contractor dupa cum urmeaza si se va trimite un certificat de conformitate impreuna cu comanda.

Coturi de conducte pentru presiune exterioara

Contractorul trebuie sa verifice etanseitatea fiecarui cot de teava intr-un dispozitiv special care simuleaza pe cat posibil starea actuala din rezervor (in special in ceea ce priveste miscarea potentiala).

Cotul trebuie testat cu petrol o data si jumatate din presiunea de operare. In timpul testarii presiunii, interiorul cotului trebuie sa ramana complet uscat pe o perioada de 2 x 15 minute atat in repaus cat si in miscare (oscilarea constanta si rotirea cotului).

Coturile tevilor pentru presiune interna

In aceleasi conditii ca mai sus, trebuie sa se verifice etanseitatea fiecarui cot de teava la presiuni interne la o data si jumatate din presiunea de operare.

Inspectia la locul de munca

De indata ce s-a instalat si este gata de functionare, se va testa etanseitatea intregului sistem de drenare din capac in prezenta clientului la o data si jumatate din presiunea de operare ca presiune interna (certificat de receptie).

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13.2 Echipamentele pentru gaze inerte pentru rezervoare cu capac fix

Daca este necesar, in solicitarea pentru specificatia de cotare, trebuie sa se instaleze pe capacul rezervorului un racord pentru echipamentele de gaze inerte.

Daca rezervorul are curba inchisa (closed design) sau este presurizat cu gaze inerte, intrarea din zona superioara a racordului indicatorului de nivel trebuie sa fie etansa (cu sigiliu).

13.3 Izolatia termica, mantaua si capacul

O structura suport alcatuita din distantiere, inele, etc. este necesara pentru instalarea izolatiei termice.

Contractorul trebuie sa primeasca de la client un proiect in care sa se indice tipul, cantitatea si locatia structurilor suport.

Contractorul trebuie sa livreze si sa instaleze structura suport.

Trebuie sa se aiba grija si sa evite coroziunea sub izolatie.

13.4 Conexiunile esafodajului

Esafodajul de schelarie este necesar pentru instalarea izolatiei. Contractorul trebuie sa livreze si sa instaleze conexiunile necesare pentru instalarea esafodajului.

Acestea se vor imparti in consultare cu contractorul, compania care asigura esafodajul si producatorul de izolatie.

13.5 Suporti pentru cabluri

Contractorul trebuie sa ofere suporti pentru cabluri pentru liniile electrice, automatice si de control conform cu specificatiile clientului.

13.6 Racordul de calibrare de rezerva pentru rezervoarele cu capac flotant

Fata in fata cu racordul obisnuit de inclinare trebuie sa se instaleze un racord de calibrare de rezerva DN 150 cu platforma de operare.

Acest racord poate sa se foloseasca si la verificarea gradientului.

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14 Sisteme de stropire

Daca este necesar un sistem de stropire, contractorul trebuie sa il instaleze in conformitate cu reglementarile internationale si locale, in colaborare cu clientul si cu ofiterul de la protectie in caz de incendii, care raspunde de acea locatie.

Daca se amplaseaza si grinzi intermediare de vant, atunci sistemul de stropire trebuie ajustat in conformitate cu partea superioara si intermediara a rezervorului.

In general apa trebuie pompata in racordurile corespunzatoare de pe capac si/sau manta.

Tevile de stropit care trebuie furnizate trebuie sa fie galvanizate la cald si prevazute cu flanse.

Trebuie sa fie posibil sa se evacueze complet intregul sistem de stropire.

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15 St ingatoare cu spuma

Contractorul trebuie sa aprovizioneze rezervoarele cu sisteme fixe de stingere cu spuma in conformitate cu normele cele mai recente. Acestea trebuie sa fie agreate cu clientul si ofiterul responsabil cu protectia in caz de incendii la locul de munca.

Tevi si sisteme de stingere cu spuma

Tevile pentru stingerea cu spuma care trebuie furnizate trebuie sa fie galvanizate la cald si prevazute cu flanse.

Daca nu se specifica altfel in solicitarea pentru specificatiile de cotare, contractorul trebuie sa furnizeze si sa instaleze pe rezervoare tevile si sistemele pentru stingatoarele cu spuma.

Legatura cu teava stingatorului cu spuma de la capatul rezervorului trebuie sa fie prevazuta cu flanse si agreeata impreuna cu clientul.

Nivelul de prag al spumei

Capacul flotant trebuie inconjurat cu un inel din tabla la,aproximativ 1,000 mm distanta de peretele rezervorului care sa ajute spuma sa patrunda in spatiul inelar (pragul) si care are o inaltime ce proiecteaza 200 mm deasupra zimtilor glisierei.

Deschiderile (marimea orificiului 40 x 100 mm) trebuie localizate intre latura inferioara a placutei si placa chesonului pentru a permite apei sa se evacueze. Pentru a se asigura ca amestecul de spuma/apa acopera repede spatiul inelar, trebuie sa existe un numar adecvat de deschideri, de preferat in mijloc intre punctele de distribuire ale spumei.

In plus, in ceea ce priveste pozitia cea mai inalta a capacului flotant, trebuie sa se asigure ca exista un spatiu de 200 mm intre latura superioara a placii de prag si latura superioara a mantalei rezervorului.

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16 Inspectarea, testarea si receptia

Contractorul trebuie sa realizeze toate testele in conformitate cu acest standard si cu Codul de proiectare aplicabil si sa trimita clientului certificatele si rapoartele o data cu livrarea rezervorului.

Inspectarea si testarea sudurilor placii de consolidare a racordului mantalei, a capacului rezervorului, a fundatiei rezervorului trebuie sa fie in conformitate cu Codul de proiectare aplicabil.

Inainte de inspectia finala trebuie sa se indeparteze toata zgura, tunderul si alte materii straine din interiorul si exteriorul rezervorului.

Trebuie sa se indeparteze atasamentele temporare sudate de partile presurizate folosite la montaj si manipulare, si orice avariere care rezulta trebuie reparata si slefuita pana devine neteda si apoi trebuie examinata in conformitate cu Codul de proiectare aplicabil.

16.1 Inspectia radiografica

Sudurile cap-la-cap din manta, placa inelara si conexiunile pentru evacuarea apei din rezervor treebuie sa fie examinate radiografic conform cu Codul de Proiectare aplicabil.

Filmul radiografic trebuie pastrat de Contractor pana la sfarsitul perioadei de garantie.

Rezervoarele cu canelura in spirala, pe langa inspectia standard, trebuie sa aiba radiografiate 100% toate racordurile sudate in locul de intersectie vertical/orizontal. Aceasta cerinta se aplica numai la rezervoarele care nu au asamblari in zigzag verticale ale mantalei.

Sudurile longitudinale ale racordului si orificiile gurilor de vizitare fabricate din placi trebuie examinate prin radiografie in puncte.

16.2 Testarea hidrostatica

Contractorul trebuie sa realizeze o testare hidrostatica conforma cu Codul de proiectare aplicabil cu apa furnizata si de care dispune Contractorul.

Testele hidrostatice trebuie facute in prezenta si cu aprobarea clientului sau inspectorului nominalizat.

Contractorul trebuie sa asigure toate materialele si instalatiile de testare inclusiv tevile temporare, pompele, blindele, ancorarea si garniturile. Inainte de testarea hidrostatica

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rezervorul trebuie curatit in interior sa nu aiba resturi, mizerie, zgura de la operatiunile de sudura, si stropitura.

Rezervoarele trebuie testate cu apa cu continut de clorura limitat la 50ppm. Daca se folosesc nivele mai mari de cloruri cu acordul clientului, durata testului trebuie limitata la minim si rezervorul trebuie limpezit cu apa curata, potabila si uscat imediat.

Clientul trebuie anuntat in avans astfel incat testul hidrostatic sa se poata desfasura in prezenta sa.

Toate atasarile sudate cu orificiile de inspectare trebuie inspectate iar inainte de testarea hidrostatica trebuie sa se realizeze testarea lichidelor cu viscozitate redusa pentru controlul nedistructiv, cercetarea magnetica precum si alte teste.

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17 Marcajul de identi f icare

Rapoartele certificate ale testelor de slefuire care se refera la fundatie, manta si placile capacului, la tevi si la flanse trebuie oferite sub forma de documente care sa certifice ca aceste materiale sunt noi si conforme cu specificatiile de control.

Fiecare rezervor finalizat trebuie sa fie prevazut cu un ecuson rezistent la coroziune care sa fie atasat in siguranta de o consola si astfel pozitionat incat sa poata fi accesat cu usurinta dupa instalare, si sa nu fie obstructionat de izolatie. Datele afisate pe ecuson trebuie sa fie in unitati SI. Ecusonul trebuie sa contina date dupa cum se solicita in Codul de proiectare aplicabil.

In zona scarilor trebuie sa se aplice placute de inscriptionare pentru identificarea rezervoarelor.

Numarul de identificare al rezervorului se poate scrie cu vopsea pe rezervor, daca solicita clientul.

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18 Documentat ie

18.1 Faza de ofertare

- Plan general care contine lista cu sau infatiseaza intreagul obiectiv de livrare conform cu solicitarea din caietul de sarcini

- Programe cu privire la planificarea, achizitionarea si instalarea intregului echipament pentru care se face cotarea.

18.2 Dupa atribuirea contractului

Dupa ce contractul este atribuit, contractorul trebuie sa pregateasca urmatoarele documente si sa le trimita clientului:

- Desene generale de amplasare care prezinta conditiile de proiectare, codul aplicabil si anexele, dimensiunile principale, liste cu duzele si gurile de vizitare, aprovizionarea cu scari, scari mobile, coridoare circulare.

- Planurile necesare pentru a fi aprobate de catre autoritati pe o scara de 1:100 si calculele structurale verificate in forma copiabila (transparenta) nu mai tarziu de o luna dupa atribuirea contractului.

Conform cu porevederile statutare locale, se poate solicita ca proiectul structural sa fie verificat de catre un inginer constructii civile, independent de contractor.

- Toate desenele din proiect, in trei copii, pentru obtinerea autorizatiei.

Toate costurile survenite ca rezultat al schimbarilor aduse partilor structurale pe care contractorul le-a facut inainte de obtinerea autorizatiei trebuie suportate de catre contractor.

Aprobarea proiectelor si calculelor nu il elibereaza pe contractor de nicio obligatie privind garantia.

- Diagrama de miscare a capacului flotant

- Planurile de sudare si planurile care contin succesiunile de sudare trebuie sa includa cel putin urmatoarele:

Succesiunea de sudare, procedura de sudare, dimensiunile, pregatirea laturilor, materialul de baza, materiale suplimentare, tratarea la cald si testele

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- Proceduri NDE (examinarea non-destructiva)

- Raport privind masurile care s-au luat pentru impiedicarea formarii cavitatilor la rezervoare in timpul instalarii ca urmare a vantului.

- Programarea instalarii nu mai tarziu de doua saptamani dupa atribuirea contractului.

- Instructiuni de operare si intretinere

18.3 Documentatia finala

Contractorul trebuie sa intocmeasca manuale cu instructiuni conform cu Standardele Petrom si sa le trimita clientului dupa finalizarea instalarii rezervorului (cand se inmaneaza rezervorul pentru efectuarea testelor. Ca un minim trebuie furnizate urmatoarele:

o Clientul trebuie sa primeasca copii ale desenelor finale certificate si date in cantitatea specificata in Contract sau in Comanda de Materiale.

o Dupa finalizarea montajului, trebuie sa se furnizeze copii ale registrelor de fabricatie ale rezervoarelor si pasapoartele acestora care sa cuprinda urmatoarele rapoarte si fise de date, prinse in dispozitive de legat, in cantitatea specificata in contract sau in comanda de materiale:

a. Certificarea producatorului care asigura ca rezervorul este construit conform cu Codul de proiectare aplicabil.

b. Rapoarte privind testele de slefuire ale materialelor.

c. Desene de executie care prezinta dimensiunile “as built”(planse conforme cu executia), locatia tuturor orificiilor pentru legaturile tevilor, gurilor de vizitare, duzelor, ecusoanelor si conexiunilor interne.

d. Rezultate N.D.E.

e. Evidenta testului hidrostatic.

f. Calcule de rezistenta.

g. Certificat de eliberare.

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19 Garanti i

Vezi Conditiile Generale pentru Achizitii ale Grupului Petrom

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Anexa 1 – Standarde si reglementari

Standarde OMV

Standarde / Specificatii Petrom

Prevederi generale pentru achizitii

Sudarea

Testarea non-distructiva a sudurilor

Structuri metalice

Specificatia materialelor tubulare

Izolatia termica

Protectia fata de coroziune

Aparatura de santier

Fundatiile rezervoarelor (sau proiectarea constructiilor civile)

INSTITUTUL AMERICAN DE PETROL (API)

API 650:2007 Rezervoare sudate din otel pentru depozitarea titeiului

API RP 651 Protectia catodica a rezervoarelor de petrol de la suprafata

API RP 2000 Rezervoare de joasa presiune si ventilare atmosferica: Non frigorifice si Frigorifice

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ASTM

ASTM A105 Specificatiile standard ale forjarilor din otel carbon pentru aplicatiile tevilor

ASTM A106 Specificatia standard a tevilor din otel carbon fara imbinare pentru serviciile prestate la temperatura mare

ASTM A234 Specificatia standard a fitingurilor tevilor forjate din otel carbon si oteluri aliate pentru servicii prestate la temperatura moderata si mare.

STANDARDE EUROPENE

SR EN 14015 Specificatia pentru proiectarea si fabricarea rezervoarelor verticale si cilindrice sudate din otel, cu fundul plat, construite pe santier pentru stocarea lichidelor la temperatura ambientala si mai mare.

EN ISO 15607 Specificatia si calificarea procedurilor de sudura pentru materialele metalice – reguli generale

EN ISO 15609 Specificatia si aprobarea procedurilor de sudura pentru materialele metalice

EN ISO 15614- 1 Testarile procedurilor de sudare pentru sudarea cu arc a otelului, nichelului si aliajelor de nichel

SR EN 287-1:2004 Testele de calificare ale sudorilor – Sudarea prin topire - Partea 1: Oteluri

SR EN 10025-1:2005 Produse laminate la cald din oteluri structurale - Partea 1: Conditii generale tehnice de livrare

SR EN 10028 Partea 1 la 7 Produse late din otel pentru presiune

SR EN 10029:1995 Table din otel groase de 3 mm sau mai mult laminate la cald – Tolerante pe dimensiuni, forma si masa

SR EN 10204:2005 Produse metalice; Tipuri de documente de inspectare

SR EN ISO 4014:2003 ver.eng. Bolturi hexagonale – Categorii de produse A si B

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SR EN ISO 4032:2002 ver.eng. Piulite hexagonale, stil 1 – Categorii de produse A si B

SR EN ISO 4034:2002 ver.eng. Piulite hexagonale - Categorii de produse C

SR EN 27963:1995 Suduri in otel – Bloc de calibrare nr. 2 pentru examinarea ultrasonica a sudurilor

SR EN ISO 898-1:2009 Proprietatile mecanice ale organelor de asamblare din otel carbon si otel aliat - Partea 1: Bolturi, suruburi si prezoane

SR EN ISO 898-6:2002 Proprietatile mecanice ale organelor de asamblare din otel carbon si otel aliat-Partea 6: Piulite cu valori ale sarcinii de proba specificate – filet cu pas mic

SR EN ISO 4759-1:2003 ver.eng. Tolerante pentru organele de asamblare - Bolturi, suruburi, prezoane si piulite; Produse clasele A, B si C

SR EN ISO 7089:2002 ver.eng. Spalatoare simple – serii normale - Clasa A (ISO 7089:2000)

SR EN ISO 7090:2002 ver.eng. Spalatoare simple, tesite - serii normale – Clasa A (ISO 7090:2000)

SR EN ISO 7093-1:2003 ver.eng. Spalatoare simple – serie mare - Partea 1: Clasa A

SR EN ISO 7093-2:2002 ver.eng. Spalatoare simple – serie mare - Partea 2: Clasa C (ISO 7093-2:2000)

SR EN 26157-1:1999 Organe de asamblare. Discontinuitati ale suprafetei. Partea 1: Bolturi, suruburi si prezoane pentru cerintele generale (ISO 6157-1:1988)

SR EN ISO 6157-2:2004 ver.eng. Organe de asamblare. Discontinuitati ale suprafetei - Partea 2: Piulite (ISO 6157-2:1995)

SR EN 10140:2007 ver.eng. Benzi inguste din otel laminat la rece – Tolerantele pe dimensiuni si forma

SR EN 10216-1:2002 Tevi din otel fara imbinare pentru presiune. Conditii tehnice de livrare. Partea 1: Tevi din otel nealiat cu proprietati specificate pentru temperatura camerei

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SR EN 10216-4:2003 Tevi din otel fara imbinare pentru presiune - Conditii tehnice de livrare - Partea 4: Tevi din otel nealiat si aliat cu proprietati specificate pentru temperaturi joase

SR EN 10217-1:2002 Tevi sudate din otel pentru presiune. Conditii tehnice de livrare. Partea 1: Tevi din otel nealiat cu proprietati specificate pentru temperatura camerei

SR EN 10217-4:2003 Tevi sudate din otel pentru presiune - Conditii tehnice de livrare - Partea 4: Tevi din otel nealiat sudate electric cu proprietati specificate pentru temperaturi mici

SR EN 10208-1:2009 ver.eng. Tevi de otel pentru conducte de fluide combustibile - Conditii tehnice de livrare - Partea 1: Tevi clasa A

SR EN 10208-2:2009 ver.eng. Tevi de otel pentru conducte de fluide combustibile - Conditii tehnice de livrare - Partea 2: Tevi clasa B

SR EN 10220:2003 ver.eng. Tevi din otel fara cusatura si sudate – Dimensiuni si mase per unitate de lungime

SR EN 1092-1:2008 Flanse si racordurile acestora – Flanse circulare pentru tevi, ventile, fitinguri si accesorii, marcate PN - Partea 1: Flanse din otel

STAS 8804/1-92 Fitinguri sudate cap-la-cap din otel aliat si nealiat. Cerinte generale tehnice de calitate

SR EN 1514-1:2003 ver.eng. Flanse si racordurile acestora – Dimensiunile garniturilor pentru flansele marcate PN - Partea 1: Garnituri plate nemetalice cu sau fara insertii

SR EN 1514-4:2004 ver.eng. Flanse si racordurile acestora - Dimensiunile garniturilor pentru flansele marcate PN - Partea 4: garnituri metalice ondulate , plate sau canelate pentru flanse din otel

STAS 1733-89 Garnituri ne-metalice. Garnituri pentru suprafete plate fara scapari de presiune – suprafete plate etanse NP2, 5 NP6, NP10, NP16, NP25, NP40. Dimensiuni

STAS 1740-80 Fier turnat si flanse din otel. Garnitura pentru suprafetele de etansare cu record conic NP 10…NP 100. Dimensiuni

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EN 13565-1 Sisteme anti incendiu fixe – Sisteme cu spuma - Partea 1: Cerinte si metode de testare pentru partile componente

SR EN ISO 14122 Partile 1 pana la 4 Siguranta masinilor – Mijloace permanente de acces la masini

SR EN 10204:2005 Produse metalice – Tipuri de documente de inspectie

SR EN 1714:2000 Testarea nedistructiva a sudurilor – Testarea ultrasonica a racordurilor sudate

SR EN 583-1:2001 Examinarea ultrasonica: Partea 1 Principii generale

SR EN 583-2:2002 Examinarea ultrasonica: Partea 2 Stabilirea senzitivitatii si a intervalului

SR EN 10029:1995 Table de 3 mm grosime sau mai mult din otel laminat la cald. Tolerantele pe dimensiuni, forma si masa

SR EN 62305-1:2006 Protectia fata de fulgere -- Partea 1: Principii generale

SR EN 50164-1:2003 ver.eng. Elementele componente ale protectiei la fulgere (LPC). Partile 1 pana la 7: Cerinte pentru componentele de conectare.

ISO

ISO 9001 Sisteme de management al calitatii — Cerinte

Societatea americana a inginerilor mecanici (ASME)

ASME Sec IX ASME Cod pentru cazan si vas presurizat, Sectiunea IX, Sudarea si lipirea cu materiale greu fuzibile.

ANSI/ASME B16.5 Flansele tevilor si fitinguri cu flanse

ANSI/ASME B16.47 Flanse din otel cu diametru mare

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Annex 2 – Sumarul def ini t i i lor de agreat inainte de atr ibuirea contractului

Punctul

1.0 Definirea presiunii maxime si a vidului

3.0 Definirea protectiei la coroziune pentru locurile neaccesibile

4.0 Definirea tipului si proiectului pentru baza rezervorului

5.0 Definirea nivelului maxim de lichide (HL, HH)

8.0 - Proiectarea colectorului de evacuare

- Definirea inaltimii maxime de sudare pentru rezervoarele cu capac flotant

- Definirea formei capacului

- Locatia semnelor de inspectie

- Definirea racordurilor pentru verificarea decantarii

- Proiectarea si amplasarea sistemelor de ventilare

- - Duzele amestecatorului - definirea tipului si a locatiei

- Definirea inaltimii platformelor adiacente

- Definirea mijloacelor de ridicare

- Definirea tipurilor de aparate pentru indicatoarele automate de nivel

- Determinarea locatiei racordului pentru temperatura, derivatia de presiune si alarma maxima

- Determinarea locatiei pentru legaturile conductelor (pozitia racordului)

- Suporti capac pentru rezervoare cu capac flotant – definirea proiectului

- Definirea tipului sistemelor de ventilare pentru rezervoarele cu capac flotant

- Definirea etansarii inelare pentru rezervoarele cu capac flotant

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- Racorduri de calibrare pentru rezervoarele cu capac flotant – definirea tipului si a locatiei

9.1 Definirea tipului si instalarii robinetului de drenare din capacul rezervoarelor cu capac flotant

9.4 Definirea structurii suport pentru izolatie

Definirea obiectivului si echipamentelor pentru izolatia crushproof (rezistenta la spargere)

9.5 Definirea legaturilor esafodajului

9.6 Definirea tavilor pentru cabluri

10.0 Definirea sistemelor de stropire si a locatiilor de conexiune

11.0 Definirea sistemelor de stingere cu spuma si a locatiilor de conexiune

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Anexa 3 – Fisa de date a rezervorului

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RO-EP-QA-SPC-003-01-B

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RO-EP-QA-SPC-003-01-B

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RO-EP-QA-SPC-003-01-B

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Anexa 4 – Metode de montare a rezervorului

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20 Lista revizi i lor

Rev Data Tipul schimbarii Revizuit de Verificat de Eliberat de

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C O N T E N T S

1 SCOPE.............................................................................................................................................................72

2 STANDARDS AND INSTRUCTIONS .............................................................................................................73

3 BASICS............................................................................................................................................................74

4 FOUNDATIONS...............................................................................................................................................75

5 CAPACITY DEFINITION .................................................................................................................................76

6 STORED PRODUCT PROPERTIES...............................................................................................................77

7 HSE AND QA/QC ............................................................................................................................................78

8 INSTALLATION REQUIREMENTS ................................................................................................................79

9 MATERIALS ....................................................................................................................................................80 9.1 THICKNESS CALCULATIONS AND CORROSION ALLOWANCES ............................................................................................ 80

10 DESIGN ...........................................................................................................................................................81 10.1 EXTERNAL LOADS....................................................................................................................................................... 81 10.2 TANK BOTTOM CONFIGURATION ................................................................................................................................... 81 10.3 NOZZLES, MANHOLES AND ATTACHMENTS.................................................................................................................... 81 10.4 TANK MOUNTED PIPING .............................................................................................................................................. 82 10.5 HEATING ................................................................................................................................................................... 82 10.6 FIXED ROOF .............................................................................................................................................................. 83 10.7 EXTERNAL FLOATING ROOF......................................................................................................................................... 84 10.8 SEALS OF THE FLOATING ROOFS.................................................................................................................................. 84 10.9 PLATFORMS, STAIRS AND LADDERS.............................................................................................................................. 84 10.10 VENTING OF TANKS .................................................................................................................................................... 86 10.11 CORROSION PROTECTION ........................................................................................................................................... 86 10.12 ACCEPTABLE DEVIATIONS AFTER INSTALLATION ............................................................................................................. 86

11 FABRICATION (ERECTION) ..........................................................................................................................88 11.1 FABRICATION GENERAL............................................................................................................................................... 88 11.2 PREPARATION OF MATERIALS...................................................................................................................................... 88 11.3 CHECK ON FOUNDATIONS............................................................................................................................................ 88 11.4 WELDING .................................................................................................................................................................. 89 11.5 ERECTION METHODS.................................................................................................................................................. 89

11.5.1 Progressive assembly and welding................................................................................................................ 89 11.5.2 Complete assembly followed by welding of horizontal seams ..................................................................... 89 11.5.3 Jacking-up method ........................................................................................................................................ 90 11.5.4 Flotation method ........................................................................................................................................... 90 11.5.5 Off site assembly........................................................................................................................................... 91

11.6 ERECTION HOLES AND ATTACHMENTS.......................................................................................................................... 91 11.7 BOTTOM PLATE, LAYDOWN, FİT-UP AND WELDİNG ........................................................................................................ 91 11.8 SETTING OUT BOTTOM COURSE OF THE SHELL PLATES ................................................................................................. 92

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11.9 CHECKING THE ALIGNMENT......................................................................................................................................... 92 11.10 ROOF FRAMING ......................................................................................................................................................... 93 11.11 SHELL TOLERANCES .................................................................................................................................................. 94

11.11.1 Verticality of the tank shell ........................................................................................................................... 94 11.11.2 Local deviation from the design form........................................................................................................... 94 11.11.3 Tolerances at horizontal and vertical shell seams ......................................................................................... 95 11.11.4 Tolerances for misalignment of plates at butt welded joints......................................................................... 95 11.11.5 Top of tank shell ........................................................................................................................................... 95

11.12 FLOATING ROOF TOLERANCES .................................................................................................................................... 96 11.13 NOZZLES AND MANHOLES........................................................................................................................................... 96

12 INSTRUMENTATION ......................................................................................................................................98

13 ADDITIONAL PETROM SUPPLEMENTS ....................................................................................................102 13.1 ROOF DRAIN SYSTEMS FOR FLOATING ROOF TANKS...................................................................................................... 102 13.2 INERT GAS EQUIPMENT FOR FIXED ROOF TANKS ........................................................................................................... 102 13.3 THERMAL INSULATION, SHELL AND ROOF..................................................................................................................... 103 13.4 SCAFFOLD LINKS...................................................................................................................................................... 103 13.5 CABLE TRAYS .......................................................................................................................................................... 103 13.6 SPARE GAUGE NOZZLE FOR FLOATING ROOF TANKS ..................................................................................................... 103

14 SPRINKLER SYSTEMS................................................................................................................................104

15 FOAM EXTINGUISHERS..............................................................................................................................105

16 INSPECTION, TESTING AND ACCEPTANCE ............................................................................................106 16.1 RADIOGRAPHIC INSPECTION...................................................................................................................................... 106 16.2 HYDROSTATIC TESTING ............................................................................................................................................ 106

17 IDENTIFICATION MARKING........................................................................................................................106

18 DOCUMENTATION.......................................................................................................................................109 18.1 QUOTATION PHASE................................................................................................................................................... 109 18.2 AFTER AWARD OF CONTRACT .................................................................................................................................... 109 18.3 FINAL DOCUMENTATION ............................................................................................................................................ 110

19 WARRANTIES...............................................................................................................................................111

ANNEX 1 - STANDARDS AND REGULATIONS..................................................................................................112

ANNEX 2 - SUMMARY OF DEFINITIONS TO BE AGREED BEFORE CONTRACT AWARD PROCESS ........117

ANNEX 3 – TANK DATA SHEET..........................................................................................................................119

ANNEX 4 – METHODS OF TANK ERECTION .....................................................................................................133

20 LIST OF REVISIONS.....................................................................................................................................134

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1 Scope

This standard applies within Petrom E&P to the construction and installation of site erected or shop assembled above ground, vertical, cylindrical tanks with fully supported flat bottoms and fixed roofs (with or without floating decks) or with floating roofs.

The tanks are used for storing petroleum, petroleum products and other liquid products at near atmospheric pressure and design temperature not exceeding 93°C.

The maximum pressure and vacuum that the tanks have to be designed for shall be defined according to the relevant requirements and given in the request for quotation specifications.

Single-walled above ground storage tanks must be located in secondary containment systems. The type and the capacity of basin shall be defined as per project requirements, but economic aspects should be considered.

Shop assembled tanks in accordance with API Standard 650, appendix J are acceptable up to a maximum diameter of 6m.

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2 Standards and Instruct ions

In conjunction with this Standard, the respective specifications, standards and directives legally applicable in Romania or in the country where the project shall be executed and stated in Annex 1 should be taken into account in their currently valid form.

This listing is not claimed to be complete.

In the event of deviations or conflicts arising between the various specifications, standards and directives and there is no firm definition by this standard, then the strictest formulation is to be applied in each case.

Where they are mutually exclusive, then the local statutory regulations will also apply.

If the contractor has reservations concerning an agreed definition, then he must notify the client of this in writing without delay.

The contractor will be responsible for checking the appropriateness of this standard for the intended purpose. The application does not relieve the contractor of his responsibility as specialist and independent entrepreneur.

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3 Basics

Flat bottom tanks shall be calculated, designed and constructed to design codes SR EN 14015 or API 650, as amended from time to time.

The designs and supplements defined in the present Petrom standards and request for quotation specifications shall also be taken into consideration.

If the contractor is of the opinion that these definitions do not represent the most cost-efficient solution, he shall notify the client and quote for alternative systems.

All tanks shall be constructed in accordance with the specified Design Code for the pressure and temperatures specified, and for the dead loads, lateral loads, and all other applicable loads specified on the tank data sheet, purchase order documents and this specification.

Any changes shall be approved by the Client.

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4 Foundations

The type and design of the tank foundations shall be agreed between the client and contractor.

A site soil expertise and the geographic and climatic conditions shall also be taken into consideration Reference is made to respective Design Code recommendations for the design and construction of foundation for flat-bottom storage tanks.

Calculations shall be submitted for approval of the Client.

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5 Capacity Defini t ion

The nominal volume is the capacity that the tank has to be designed for in relation to the properties of the product to be stored.

This volume should be achieved when the highest process fluid level designated "HL" is reached. In addition, a maximum liquid level designated "HH" shall be agreed. Furthermore, the notes in respective Design Code on capacity determination shall apply.

The required capacities, dimensions and other design data shall be defined on the Storage Tank Data Sheet. Exact dimensions shall be determined based on site available, local conditions, and applicable codes and regulations.

In selecting tank dimensions, tallest tank compatible with permissible ground loading, economic fabrication, and local authority restrictions should normally be chosen.

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6 Stored Product Propert ies

All the key data for the product to be stored, such as specific weight, temperature, viscosity, etc., shall be as indicated in the request for quotation specifications and tank documentation.

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7 HSE and QA/QC

All activities performed by the Contractor on the construction site shall comply with all Petrom norms, standards or instructions as well as with Romanian legislation regarding HSE and QA/QC requirements.

Before commencement of the works, the contractor shall send to Client for approval the Inspection and Test Plan (ITP) and the Project Quality Plan (PQP).

The QA/QC checks and tests shall be defined in accordance with Petrom Quality Inspection plan and QA Manual.

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8 Instal lat ion Requirements

During erection, anchored guy ropes or other methods approved by Client shall be provided to secure incomplete storage tanks against damage by wind. Recommended system for tank guying is given below as reference.

All nozzles and openings shall be protected with a blank cover.

Detailed tank installation procedure shall be submitted by Contractor for approval before commencement of installation work.

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9 Materials

Materials of tank construction shall conform to respective Design Code unless otherwise indicated on storage tank Data Sheet.

All steel shall be fully killed and made to fine grain practice. The minimum metal design temperature shall be as stated in the datasheets. Impact testing shall be performed to the requirements of Design Code at the minimum design temperature as stated in the datasheets. All permanent welded shell attachments shall comply with the same impact requirements of shell plate materials.

Cast fittings or other components shall not be used in tank shell or bottom.

Material without authentic test record shall not be used.

Use of asbestos gaskets is prohibited.

Welding materials shall conform with the Welding and Material specifications.

Platforms, ladders and stairs are to be galvanised, including all brackets and bolting.

Painting and lining materials shall conform to related specifications.

9.1 Thickness calculations and Corrosion allowances

The thickness of shells and other pressure-containing parts shall be computed as set forth in the respective Design Code. Design calculations shall be submitted with the Contractor’s drawings for client review.

Minimum internal and external corrosion allowances for base, shell, and roof will be specified by client, based on anticipated service conditions, on the Tank Data sheet.

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10 Design

10.1 External loads

Wind loads shall be in accordance with Design Code, unless stated otherwise on the datasheet. The basic wind velocity and the topography, roughness, and the statistical factors shall be as defined in the referenced project specifications. Calculations for intermediate wind girders for storage tanks shall be based on the nominal (as-ordered) shell thickness.

Earthquake loading shall be defined by Client for the location that the tanks will be installed. Seismic calculations shall be submitted for review.

Roof minimum live load and nozzle load design shall be in accordance with applicable Design Code.

10.2 Tank bottom configuration

The tank floor shall be concave sloping from the centre down to the edge.

A floor gradient of 1 ‰ shall be aimed for. The tank floor shall be so designed that the acceptable uniform and non-uniform settling between the tank side and centre can be compensated for.

Plate of a width of at least 2,000 mm and a thickness to applicable Design Code. Where required, by code, bottom annular plates shall be provided.

The base plates shall be welded overlapping and avoiding undercutting. After the welding work has been completed, all the remaining beads and spatter shall be removed.

If the floor of the tank is to be coated (see request for quotation specifications), all the edges of the floor plates shall be rounded off with a radius of at least 3 mm.

Water draw off and sump:

• number and location shall be specified by the client.

• the details for the sump and the water draw off connection shall be defined together with the client.

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10.3 Nozzles, Manholes and Attachments

Nozzles, manholes and other connections shall be designed in accordance with applicable Design Code and with the provisions listed below.

All shell nozzles size 6 inch (DN 150) and greater shall be provided with a reinforcing pad. Nozzle reinforcement shall be in accordance with Design Code.

All reinforcing plates of nozzles attached to the outside shall be drilled and tapped for a 0.25 inch NPT inspection pipe and be compressed-air and soap-film tested at a pressure of 1.0 barg.

Reinforcing pads shall preferably not cover a welded joint unless unavoidable and approved by Employer. The covered area of the joint plus 100mm each side shall be ground flush and 100% radio graphed prior to fitting the pad.

The number and size of manholes shall be as specified on the Storage Tank Data Sheet. In any case, shell manhole size shall not be less than 36” and roof manhole size shall not be less than 24”.

Cover plates with bolting, gaskets and davit shall be provided for manholes.

All shell nozzle pipe necks to be seamless and shall be in accordance with applicable Design Code unless specified otherwise on storage tank data sheets.

Nozzles and Manholes neck fabricated from plate shall have a single longitudinal weld.

If mixers shall be installed on the tank shell or roof, the nozzle size shall be determined in the data sheet. Size shall be verified and finalized by the mixer vendor before the detailed design.

10.4 Tank Mounted piping

Internal and external tank mounted piping shall be supplied, erected and tested by Contractor. Tank external roof piping shall terminate with a flanged elbow, 1m above the top of tank foundation, unless otherwise specified.

Tank mounted firewater piping and gas blanketing piping, as applicable, shall be supplied, erected and tested by Contractor.

Contractor shall supply, erect and test the tank firewater deluge valve skid.

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10.5 Heating

If tank heating is required in the request for quotation specifications, it shall comply with data sheets, project requirements, specifications.

Contractor shall size and supply internal product heater piping.

10.6 Fixed roof

The required roof shape shall be given in the request for quotation specifications:

- self-supporting domed roof with rafters (curvature radius = 1.5 x tank diameter)

-self-supporting conical roof with rafters. Its gradient shall be 15 degrees ( + 3 degrees).

- cantilever without rafters

Fixed roofs for storage tanks shall be in accordance with applicable design Code and related subsections.

Tanks specified to be fully painted internally shall have continuous welded internal joints with corners and sharp edges radiussed.

Contractor shall provide an emergency vent and a suitable vent mounting roof connection where roof to shell joint cannot be designed as frangible.

Overlap of roof plating shall allow self draining of rain water to avoid external corrosion.

Venting equipment shall be approved by the recognised international standard and shall have bolted flange connections. Open vents shall have screens and shall have weather protection. Number, size and type of the vents may be specified in the data sheets. If not, contractor shall make the venting calculations and shall submit for approval.

Internal floating roofs:

Internal floating roofs shall be designed as per applicable design Code and related subsections.

Floating roofs shall be capable of eliminating at least 95% of the hydrocarbon emission that could be produced in absence of the floating roof.

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Floating roofs shall be designed to operate to the lowest level permitted by tank internals, unless specified otherwise in the storage tank data sheets.

Floating roofs shall be fitted with adjustable support legs, designed so that they can be adjusted from the top side of the internal floating roof. The support leg position shall provide a 1.5m clearance between the lowest portion of the roof and the tank floor.

Seal materials of floating roofs shall be chemically compatible with the product.

Floating roofs shall be fitted with access manholes, emergency drains discharging directly into the stored product and a sampling and gauging device.

10.7 External Floating roof

External floating roofs shall be as per applicable Design Code provisions.

Unless otherwise is agreed, rolling ladder shall be provided with floating roof that will automatically adjust to any roof position to allow access to the roof. API 650 C.3.7 shall be followed.

10.8 Seals of the Floating roofs

Seal selection shall be specific to tank. Seal vendor should confirm that the seal meets the required criteria and the regulatory requirements.

Viton (FPM) and Teflon (PTFE) are the preferred seal materials as they resist to hydrocarbons and UV light and they have flame retardancy properties. Foam seals are not preferred.

10.9 Platforms, stairs and Ladders

The Contractor shall furnish welded steel external platforms and external stairway(s) and ladders from grade to top of storage tank and to any shell mounted platforms as indicated on Storage Tank Data Sheet.

Design

The designs shall be based on the Petrom standards in steel structures. Connections on the tank shell and roof shall not be welded directly to the tank plating, but to suitable shims.

Platforms, walkways, stairways and ladders shall conform with Project standard drawings.

Exterior ladders shall be caged and extend from grade level to 1000mm above platform or roof level.

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Platforms shall have a minimum clear width of 900mm.

Wind girders that also serve as walkways shall be designed for additional load due to personnel.

Exterior stairways

All tanks shall be equipped with a tangential exterior stairway up to the roof if the tank has a fixed roof and up to the upper gallery if it has a floating roof. The inside width shall be at least 800 mm.

If the tanks have exterior insulation, the exterior stairways shall be the same distance away from the tank shell as the insulation thickness given in the request for quotation specifications plus 50 mm.

At the level of the crest on the exterior stairways and fire escapes, a platform connecting the crest to the walkway shall be provided as specified by the authorities. The client shall specify the height of the platform.

Wind bracing for floating roof tanks

The wind bracing shall be so designed that it can be used as an upper gallery with an inside width of at least 800 mm. A track for a gondola (for 10 kN point load) shall be fitted round the entire outer circumference of the bracing.

Fire escapes

If the tank circumference is greater than 50 m, an escape ladder must be located on the opposite side to the stairway.

For safety reasons, a safety bar (fall protection) shall be fitted to the top of the escape ladder.

Intermediate platforms

The exterior stairways and escape ladders shall be equipped with intermediate platforms. These platforms shall be located at least every 20 steps on exterior stairways and at least every 10 m (height) on escape ladders.

Mobile ladders for floating roof tanks

A mobile ladder of a minimum width of 600 mm and a safety bar (fall protection) shall be provided from the shell rim to the walkway on the roof.

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The ladder steps shall so designed that they can turn like a parallelogram or arch in such a way that they are horizontal whatever the ladder's position.

The mobile ladder supporting structure on the floating roof shall be placed or supported on the roofing (no connection with the pontoon permissible).

Mobile ladders shall be earthed.

Roof edge guardrail on fixed roof tanks

Every tank shall be provided with a roof edge guardrail.

Lifting gear

Lifting gear shall be provided in a suitable position or trolley support round the entire tank circumference for installing and removing equipment (such as instruments, vent valves, mixers, etc.). The type of lifting gear shall be agreed with the client.

Where crane use is possible, the lifting gear mentioned above can be dispensed with.

10.10 Venting of tanks

Venting of the tanks shall be designed as per applicable Design Code and API 2000 requirements.

Venting calculations shall be submitted for Client review.

10.11 Corrosion protection

Depending on the agreement between client and contractor, cathodic protection of the tank may be in the scope of the contractor or may be performed by the cathodic protection vendor. In any case, the consultancy to cathodic protection vendor is required to achieve healthy cathodic protection.

An exception is the parts of the tank that are no longer accessible once installation has been completed. The contractor must however consult the client and apply corrosion protection to these areas during installation.

API 651 shall be used as guideline to tank cathodic protection.

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External cathodic protection is related to type of the foundation and soil protection. These criteria should also be taken in consideration.

In any case the cathodic protection design shall be approved before the tank installation commencement.

10.12 Acceptable deviations after installation

Vertical position

- of the pipe for the level indicator

- of the axis of the temperature sensor cross section

- of the gauging device (roof) to platform axis The maximum deviation from the vertical may be:

Tank height up to 14 m ..............................3 mm from 14 m to 16 m....4 mm from 16 m to 20 m....5 mm over 20 m .................6 mm

Tolerances:

Dimensional tolerances of the tanks shall be in accordance with applicable Design Code for proper appearance and functioning.

Inspection

The vertical positions must be checked after filling the tank with water and if any deviations are detected, the stand pipe for the level indicator must be readjusted.

The stubs, stairways and all other installations must be checked.

A check must be carried out to ensure that the weld beads have been removed from guide bars, scaffolding parts, etc. When temperature sensors are used (floating roof tanks), the frame shall not be welded to the platform until after the tank has been filled with water and sounded (when it is empty).

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11 Fabricat ion (Erect ion)

11.1 Fabrication general

Fabrication involving welding shall not be sublet to others without advance written approval from client.

Fabrication includes laydown, fit-up, welding of tank annular bottom and sketch plates the erection fit-up, welding testing of tank shell plates and appurtances, assembl welding of roof plates and roof appurtances and internal and external piping within the limits of the final flange joint of the tank and the fit up ,welding and inspection of stairays, wind girders, shell stiffeners and accessories.

11.2 Preparation of Materials

All materials shall be examined and repaired as necessary at site before being erected, to ensure that any damage is made good to the satisfaction of the Company.

11.3 Check on foundations

Before accepting foundation, contractor shall make detailed inspection of it and advise client of its findings.

Contractor shall inspect and check for levellness and profile before starting work and shall notify client and foundation Vendor of any deficiency that requires rectification.

During construction of tank, contractor shall avoid contaminating grade with foreign material that may cause accelerated bottom corrosion.

Contractor shall maintain grade in true profile and free of foreign materials, such as clay, coal, cinders, metal scraps, or vegetable matter, and shall repair damage to foundation or grade surface caused by its operations.

If mutually agreed that corrective action will be required to comply with the requirements, such agreement shall be subject to client approval.

Work or additional material required for reestablishing finish grade for granular setting bed, after foundation has been accepted by and turned over to contractor, shall be furnished by contractor at no additional cost to client.

Damage to ring wall or ring beam caused by tank Vendor operations shall be corrected by contractor in manner acceptable to and at no additional cost to client.

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11.4 Welding

All welding, qualification of welding procedures, qualification of welders and welding operators shall be done in accordance with the ASME Code, Section IX, or related reference EN standards, project-welding specifications.

Welding procedure specifications and procedure qualification records shall be submitted for review before fabrication can commence.

Welding will not be permitted when the surfaces to be welded are wet, covered with ice or during periods of high winds unless adequate protection and heating are provided.

Only qualified welders shall be used for fabrication and erection. The Contractor shall submit, when requested, a list of qualified welders and the processes for which they have been qualified.

11.5 Erection Methods

Welded vertical tanks can be erected satisfactorily in several ways; no single particular system of erection procedure is specified for use.

The method of erection shall be approved by the Company.

The most well know methods of erection are described below:

11.5.1 Progressive assembly and welding

In the progressive assembly method, the bottom plates are assembled and welded first. Thereafter the shell plates are erected, held in place, tacked and completely welded. This shall be done course by course, working upwards to the top curb angle. No course shall be added as long as the previous course has not been entirely welded.

The erection and completion of the roof framing and roof plates then follow (see Annex 4).

11.5.2 Complete assembly followed by welding of horizontal seams

In the complete assembly method, the bottom plates are assembled and welded first. Thereafter the shell plates are erected, held in place, tacked and only the vertical seams completely welded, leaving the horizontal seams unwelded. This shall be done course by course, working upwards to the top curb angle. No course shall be added as long as the vertical seams of the previous course have not been entirely welded.

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The erection and completion of the roof framing and roof plates then follow.

Finally the horizontal seams are welded, working upwards from the bottom course or downwards from the top curb angle. See Annex 4.

11.5.3 Jacking-up method

Some contractors employ a system of erection in which the bottom plates are completed, the top course is erected on the bottom plates, the roof framing and sheeting are completed and a number of jacks are then assembled around the structure. By means of these jacks, the completed top course together with the roof framing and sheeting is lifted to a height sufficient to insert the next lower course. The jacking method and the supporting of the partly erected shell shall have no adverse effect on the roundness of the shell.

The welding is completed at each stage of lift until all courses of the shell plates have been inserted and the finished height is reached.

The final operation is the welding of the bottom course to the bottom plates. See Annex 4.

11.5.4 Flotation method

The flotation method is used for floating roof tanks. After the completion of the bottom plating and erection and welding of the two lower courses of the tank, the floating roof is assembled on the tank bottom and completed. The tank is then filled with water and, using the floating roof as a working platform, the third and subsequent courses are erected and welded, water being pumped in as each course is completed.

Regular checks on the vertical alignment and roundness are required to ensure compliance with (11.9) and (11.11).

This method may only be used at locations where soil settlement is very limited and with the agreement of the Principal. The predicted soil settlements of the soil investigation report shall be taken into account.

A small crane is usually erected on the floating roof for hoisting the shell plates into position. See Annex 4.

In high wind areas the flotation method is a good protection against tank shells collapsing because of the effect of wind gusts during construction. For this reason the flotation method could be used in a modified manner for the erection of fixed roof tanks, provided

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that the erection procedure to be submitted to the approval of the Company by the Contractor.

11.5.5 Off site assembly

This method may only be used with the agreement of the Company; it is suitable for hazardous locations and/or locations close to existing tanks already storing light products. Tanks can be prefabricated and moved to their permanent site, either by:

- Assembly of the tank in the workshop. The maximum dimensions depend on the possibilities and limitations with respect to transport. Generally this method shall be limited to tanks with diameters up to 12 metres.

- Assembly of the tank on a temporary foundation at a safe location nearby. The complete tank is then moved to its permanent foundation, e.g. by crane, on rollers or by air cushion.

The water test shall be carried out when the tank is standing on its permanent foundation.

11.6 Erection Holes and Attachments

Holes shall not be made in platework to assist in erection.

Lugs, nuts, clamps, and other devices to assist in erection may be attached to the tank plates by welding, but all such attachments required only for the purposes of erection shall ultimately be removed and any noticeable projections of weld metal remaining shall be carefully ground or chipped away.

Plates shall not be gouged or torn in the process of removing attachments, and any indentations caused thereby shall be filled with weld metal and ground flush with the plate surface.

11.7 Bottom Plate, Laydown, Fit-up and Welding

The annular plates shall be located and laid after measuring and marking the outside radius and the butt joint locations of the annular plates, which are measured from the tank centre point established on the foundation.

The outside radius of the annular plates will be increased by 20mm from that dimension shown on the design drawing to compensate for welds shrinkage of the annular plate to shell plate corner weld joint. The radius increase is based on the industries best practices and used by all successful tank constructors worldwide.

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The joints shall be set in accordance with the detail drawings and aligned using key plates and finger bars then welded from the outside for approximately 250mm, leaving the rest of the butt joint unwelded to allow for weld shrinkage during the welding of the corner seam.

Radiographic examination of 50 % of the annular plate radial butt joints shall be carried out at the outer edge of the joint in the area where the tank shell plate and annular plate intersect prior to erection of the first ring tank shell plate.

The bottom plates shall be arranged and laid in accordance with the sequence detailed on the bottom plate arrangement drawing of the tank.

The width of each bottom plate lap joint shall be increased by 5 mm than that of shown on the drawing to compansate for weld shrinkage.

11.8 Setting out Bottom Course of the Shell Plates

In setting out the bottom course of shell plates, allowance shall be made for the contraction of the joints during welding. While the plates are being plumbed and checked for circularity, and before they are tack-welded to the bottom, they shall be held in position by metal clamps or other devices attached to the bottom plates.

11.9 Checking the Alignment

Before final welding of the bottom course of shell plates begins, a check should be made to ensure that the alignment of the plates and the width of the gaps between them are correct, and that any inaccuracies after welding will be within the tolerances stated below. If the tolerances are expected to be exceeded, the plates shall be re-aligned before final welding begins. Care shall be taken to minimize lack of circularity or distortion between the top and bottom of the tank shell, whether due to welding or any other cause. Rectification by cutting of shell plates is not permitted.

After the first course has been erected and welded, the internal radius, measured horizontally from the centre of the tank to any point on the inside of the tank shell, shall not vary from the nominal internal radius by more than the following:

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Tank diameter (m) Maximum deviation from nominal internal radius (mm)

≤ 12.5 13

> 12.5 ≤ 45 19

> 45 25

11.10 Roof Framing

Before erection of the roof framing begins, the tank shell shall be checked for uneven settlement, and any misalignment of the top of the shell shall be corrected before the roof members are positioned.

Temporary supports for the erection of the roof framing shall not be removed until the erection of the main and secondary framing is complete. With dome roofs, the temporary centre support shall not be removed until radial rafters, purlins and bracings are erected, completed and welded, and all roof sheets are tack-welded into position. The positioning of the roof trusses shall be done very accurately to prevent misalignment.

When assembling roof sheets on the framing, excessive asymmetric loads shall be avoided and not more than three roof sheets shall be stacked at any one point.

For dome roofs, the roof sheets shall be assembled symmetrically, working from the centre outwards.

The strength of erection poles used for temporary support of the roof structure shall be checked by calculation for the maximum load to be carried.

In particular the resistance to buckling shall be checked. The erection contractor shall make a calculation showing strength and safety of the erection poles to be used.

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11.11 Shell Tolerances

11.11.1 Verticality of the tank shell

After completion, the shell shall not be out of vertical by more than the following:

Tank diameter

(m)

Maximum deviation from vertical

≤ 12.5 1 in 400

> 12.5 ≤ 30 1 in 350

> 30 ≤ 45 1 in 300

> 45 1 in 250

These tolerances shall apply to the tank shell as a whole and should also be used as a guidance for each individual course.

11.11.2 Local deviation from the design form

Local deviation from the design form for the shell (horizontally and vertically) shall not exceed the following when measured over a gauge length of 2.5 m remote from weld seams:

Plate thickness

(mm)

Maximum local deviation from the design form (mm)

≤ 12.5 16

> 12.5 ≤ 25 13

> 25 10

Such deviations from the design form shall be gradual over the gauge length, without any sharp changes in form.

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11.11.3 Tolerances at horizontal and vertical shell seams

At horizontal and vertical shell seams the shell profile shall not deviate from its design form by more than the following, measured over a gauge length of 1 m:

Plate thickness

(mm)

Maximum deviation from the shell profile at weld seams (mm)

≤12.5 10

> 12.5 ≤ 25 8

> 25 6

11.11.4 Tolerances for misalignment of plates at butt welded joints

Plates to be joined by butt welding shall be matched accurately and retained in position during the welding operation. Misalignment of the centre line of the plates shall not exceed the following:

Plate thickness, t (mm)

Maximum misalignment (mm), whichever is the lesser

Completed VERTICAL JOINTS

≤ 19 0.1 t 1.5

> 19 0.1 t 3.0

Completed HORIZONTAL JOINTS

≤ 8 (upper plate)

0.2 t 1.5

> 8 (upper plate)

0.2 t 3.0

11.11.5 Top of tank shell

The tank shell shall be checked for circularity, dimensions and level before the wind stiffener(s) and roof members (fixed roof tank) or the secondary and primary wind girders (floating roof tank) are erected.

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11.12 Floating Roof Tolerances

The differences in the gap between the shell and the periphery of the roof on completion of erection of the roof shall not exceed ± 13 mm from the nominal gap.

At any elevation of the roof other than that at which it was erected, this difference in nominal gap shall not exceed ± 50 mm unless a different value has been agreed with the Company for a particular seal design.

11.13 Nozzles and Manholes

Shell nozzles and manholes will be installed as the tank shell erection works continues. Strong backs and plate stiffeners shall be installed and attached to the shell plate location of the manholes and nozzles reducing weld distortion of the local area. (see Fig8 -ad etailb elow)

Welding shall be carried out utilising a weld sequence which the Contractor has proven previously to produce an acceptable shape within the tolerances.

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12 Instrumentat ion

Instrumentation on the tank shall be as specified in the data sheets, project specifications, piping and instrumentation diagrams.

Normally instrumentation is not included in the scope of tank vendor, however it will be agreed between the contractor and the client.

The following information should be used as guideline for instrumentation.

Devices for determining the liquid level

Unless otherwise stated in the request for quotation specifications, the following devices shall be provided for determining the tank contents:

Manual gauging or sampling in fixed roof tanks

When selecting the design and material for gauging or sampling devices, it should be ensured that sparking (electrostatic charge) is prevented.

Manual level indicators for floating roof tanks

The guide pipe to be provided in DN 200 (8”) shall be equipped with a gauging device.

This guide pipe must also be suitable for taking samples.

When selecting the design and material, it should be ensured in particular that sparking (electrostatic charge) is prevented.

Automatic level indication (liquid level indicator)

If stated in the request for quotation specifications, the contractor shall provide a suitable measuring device. The type and installation shall be agreed with the client.

Maximum alarm nozzle

For measuring the maximum liquid level, one stub shall be provided on the temperature measuring device platform for floating roof tanks and on the roof for fixed roof tanks. Its location and/or dimensions shall be agreed with the client.

Temperature measuring equipment

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This includes the following devices

Automatic temperature display

- One nozzle on the roof for fixed roof tanks

- For floating roof tanks, one nozzle on the floating roof, including a platform of a suitable design in the area of the shell gallery inside the tank

- DN 25 (1”) temperature measuring nozzles

The nozzle design and location shall be agreed with the client and shall be indicated in the data sheets and the drawings.

Pressure tapping and inert gas stubs for fixed roof tanks

Pressure tapping stubs will be in DN 25. Their location shall be agreed with the client.

Sampling equipment

The following equipment shall be provided for taking samples in floating roof tanks.

Two DN 150 (6”) sampling stubs (including covers) shall be located in the roof membrane for taking samples.

The first stub shall be located approximately in the middle of the tank with the second at about half the radius. They shall be so installed that they can be operated from the walkway.

The following equipment may be required for fixed roof tanks to request for quotation specifications:

- For tanks without inert gas equipment, one sampling stub in DN 150 (6”) including cover shall be provided.

- For tanks with inert gas equipment, a gas-tight, explosion-proof device shall be used for sampling. It shall be so installed that during sampling the inert gas is prevented from escaping from the gas cushion located above the medium. The device's seal and function must not be affected by condensation or icing.

- Sampling stubs shall be located on the wall as agreed with the client. A drip tray with means of discharging into the drain shall be provided below the stubs. The drip tray must be located far enough below the sampling cocks for product samples to be taken using one-liter sample bottles.

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Swivel pipe sampling device on fixed roof tanks

According to the request for quotation specifications, a swivel pipe shall be provided with suitable dimensions for the sampling stub. The sampling stub shall be braced inside and outside the tank with four ribs at 90 degrees to each other.

The rope guide attached to the roof must be gas-tight and easily accessible from the roof.

An indicator (attached to the cables) on the pole (flat bar measuring at least 300 x 3 mm) shall be used to show the swivel pipe's position.

The pole shall be white with a red indicator.

Tank calibration

The following requirements shall be met for official calibration of the tank:

Gauging nozzle (manual level indication)

The gauging nozzle must protrude at least 800 mm over the roofing on fixed roof tanks and over the platform at the gauging point on floating roof tanks.

There must be a gauge mark on the nozzle. The gauging mark is a stainless steel flat bar standing on the narrow side and welded into the gauge nozzle as a chord. Its upper edge must be sharp and horizontal protruding 3 mm over the pipe's top edge.

The point of reference for gauging is where the gauge vertical intersects the horizontal top edge of the gauge or a parallel plane where the top edge of the gauge mark lies.

Even if the tank is filled to different levels and the shell and floor are deformed as a result, the reference point's position must not change in the vertical. The gauge nozzle shall be located on a stable part of the roof where there can be no changes in the reference point's vertical position, even if the roof is walked on (gauge nozzle fixed to a bracket on the tank wall).

The gauging nozzle must be so accessible that the observer can select a location for gauging and lower the gauging strip through the gauging nozzle into the tank without obstruction. During this process, the gauge mark must be located on the side of the gauge nozzle away from the operator.

The gauge nozzle cover shall be so designed that the gauge nozzle can be tightly closed without pressing on the dip mark. Below the top edge, a base shall be welded to the pipe

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where the calibration plate and the Weights and Measures Office's gauge location plate shall be attached. The base is not required if the dip stub is located inside a cabinet where plates can be attached to the outside.

No components may be installed in the vertical below the dip stub.

The dip platform must be level and adjustable in the horizontal. It must be possible to protect the setting with a seal.

Gradient check (spare dip stub)

The tanks shall be equipped with a gradient checking device in the form of a gauge stub located diagonally opposite the dip stub.

The gauge stub must be so located that its vertical position cannot be changed by deformation of the tank shell or walking on the roof. No components may be installed in the vertical below the gauge stub.

The gauge stub shall be designed more or less like the dip stub, but the measuring mark is not necessarily required and the top edge of the pipe must be cut off horizontally and closable with a blind flange.

Calibration stub for checking the height of floating roofs.

For checking the height of floating roofs, at least four inspection stubs (diameter 2"-3") with a closure shall be welded round the circumference of the roof. These pipes shall be located as close as possible to the edge of the floating roof and evenly distributed.

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13 Addit ional PETROM Supplements

13.1 Roof drain systems for floating roof tanks

A drain system of a suitable size for the local rainfall levels shall be provided. One or more drain systems shall be installed, depending on the size of the floating roof.

If pipe elbows are fitted, product-resistant seals and suitable lubricating grease shall be used.

The type and installation of the roof drain valve shall be agreed with the client.

Checking the roof drain system's leak tightness

All elbows shall be inspected by the contractor as follows and a certificate of compliance submitted with the order.

Pipe elbows for external pressure

The contractor shall inspect every pipe elbow for leak tightness in a special device simulating the actual conditions in the tank as far as possible (especially with regard to the potential movement).

The elbow shall be tested with petroleum at one-and-a-half times the operating pressure. During the pressure test, the inside of the elbow must remain completely dry over a period of 2 x 15 minutes both while at rest and in motion (constant swinging and turning of the elbow).

Pipe elbows for internal pressure

Under the same conditions as above, each pipe elbow shall also be tested for leak tightness at internal pressure of one-and-a half times the operating pressure.

Field inspection

Once installed ready for operation, the entire roof drain system shall be tested for leak tightness in the client's presence at one-and-a half times the operating pressure as internal pressure (acceptance certificate).

13.2 Inert gas equipment for fixed roof tanks

If required in the request for quotation specifications, a nozzle for the inert gas equipment shall be installed on the tank roof.

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Should the tank be of a closed design or pressurized with inert gas, the door in the upper area of the level indicator nozzle shall be gas tight (with seal).

13.3 Thermal insulation, shell and roof

A support structure consisting of spacers, rings, etc. is required for installing the thermal insulation.

The contractor shall receive a drawing from the client showing the type, quantity and location of the support structures.

The contractor shall deliver and install the support structure

Care shall be taken in order to avoid corrosion under insulation.

13.4 Scaffold links

Scaffolding is required for installing the insulation. The contractor shall deliver and install the links required for attaching the scaffolding.

They shall be divided up in consultation with the contractor, scaffolding company and insulation manufacturer.

13.5 Cable trays

The contractor shall provide the cable trays for the electrical, instrumentation and control lines to the client's specifications.

13.6 Spare gauge nozzle for floating roof tanks

A spare DN 150 gauge nozzle with operation platform shall be installed opposite the regular dip nozzle.

This nozzle may also be used for checking the gradient.

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14 Sprinkler Systems

If a sprinkler system is required the request for quotation specifications, the contractor shall install it in compliance with the international and local regulations liaising with the client and the fire protection officer responsible for the site.

If intermediate wind girder(s) is(are) provided, the sprinkler system shall be adjusted accordingly for intermediate and top section of the tank.

The water shall generally be piped to suitable nozzles on the roof and/or the shell.

The sprinkler piping to be provided shall be hot dip galvanized and flanged.

It must be possible to completely drain the entire sprinkler system.

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15 Foam Extinguishers

The contractor shall provide fixed foam extinguishing systems on the tanks in accordance with the most recent guidelines. They shall also be agreed with the client and the fire protection officer responsible for the site.

Foam extinguisher pipes and systems

The foam extinguisher pipes to be provided shall be hot dip galvanized and flanged.

Unless otherwise required in the request for quotation specifications, the contractor shall supply and install the foam extinguisher pipes and systems on the tanks.

The connection to the foam extinguisher pipe at the tank end shall be flanged and agreed with the client.

Foam threshold plate

The floating roof shall be surrounded with a web plate approx. 1,000 mm away from the tank wall, which helps the foam to penetrate the annulus (threshold) and is of such a height that it projects 200 mm above the slide plate teeth.

Openings (hole size 40 x 100 mm) shall be located between the lower edge of the web and the pontoon plate to enable the water to drain off. To ensure that the foam/water mixture covers the annulus quickly, there should be an adequate number of these openings, preferably in the middle between the foam distribution points.

In addition, with respect to the floating roof's highest position, it must be ensured that there is a space of 200 mm between the top edge of the threshold plate and the top edge of the tank shell.

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16 Inspection, Test ing and Acceptance

The contractor shall carry out all the tests to this standard, to applicable Design Code, and submit the certificates and reports to the client no later than when the tank is delivered.

Inspection and testing of shell nozzle reinforcement-plate welds, storage tank roof, storage tank bottom to shell weld and storage tank bottom shall be in accordance with applicable Design Code.

Prior to the final inspection, all slag, loose scale, dirt and other foreign matter shall be removed from the inside and outside of the storage tank.

Temporary attachments welded to pressure parts for erection and handling shall be removed, and any resulting damage shall be repaired and ground to a smooth profile and examined in accordance with applicable Design Code.

16.1 Radiographic Inspection

Shell butt welds, annular plate butt welds and flush-type connections shall be radiographically examined in accordance with applicable Design Code.

Radiographic film shall be retained by the Contractor until the end of the guarantee period.

Scroll type tanks, in addition to the standard inspection, shall have all vertical/ horizontal intersection site welded joints 100% radiographed. This requirement is applicable only to tanks which do not have staggered vertical shell welded joints.

Longitudinal welds of nozzle and manhole necks fabricated from plate shall be examined by spot radiography.

16.2 Hydrostatic Testing

The Contractor shall perform a hydrostatic test conforming to applicable Design Code with water supplied and disposed of by the Contractor.

Hydrostatic tests shall be witnessed in the presence and with approval of the client or nominated inspector.

The Contractor shall furnish all test materials and facilities including temporary piping, pumps, blinds, bolting, and gaskets. The storage tank shall be cleaned internally of dirt, debris, welding slag, and weld spatter before the hydrostatic test.

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Tanks shall be tested with water having chloride content limited to 50ppm. If higher levels of chlorides are used with cleint approval, the duration of test shall be limited to a minimum and the tank shall be rinsed with clean, potable water and dried immediately.

Client shall be notified in advance so that the hydrostatic test can be witnessed.

All welded attachments with inspection holes shall be tested and all dye penetration, magnaflux and other tests shall be done prior to hydrostatic testing.

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17 Identi f icat ion Marking

Certified mill test reports covering all bottom, shell and roof plates, piping and flanges shall be furnished as evidence that such materials are new and in compliance with the governing specifications.

Each complete storage tank shall be provided with a corrosion resistant nameplate securely attached to a bracket and so located that it is easily accessible after installation, and not obstructed by insulation where applicable. Data shown on nameplate shall be in SI units. The nameplate shall contain data as required in applicable Design Code.

Tags for labeling the tanks shall be applied in the area of the stairway.

Tank identification number can be painted on the tank if required by the client.

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18 Documentat ion

18.1 Quotation phase

- General plan listing or showing the entire scope of delivery to request for quotation specifications.

- Schedules regarding the planning, purchasing, delivery and installation of all the equipment that is quoted for.

18.2 After award of contract

After the contract is awarded, the contractor shall prepare the following documents and supply them to the client:

- General arrangement drawings showing design conditions, applicable code and appendices, principal dimensions, nozzle and manway lists, provision of stairways, ladders, walkways

- The plans required for approval by the authorities on a scale of 1:100 and the verified structural calculations in copyable form (transparent) no later than one month after award of contract

Under the local statutory provisions, the structural design may be required to be verified by a civil engineer independent of the contractor

- All design drawings, in triplicate, for obtaining release

All costs incurred as a result of changes to structural parts that the contractor produced before release shall be borne by the contractor

Approval of the drawings and calculations does not release the contractor from any warranty obligations

- Floating roof movement diagram

- Welding plans and welding sequence plans that shall include at least the following:

Welding sequence, welding procedure, dimensions, edge preparation, base material, additional material, heat treatment and tests

- NDE (non-destructive examination) procedures

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- Report on precautions taken to prevent the tank from caving in during installation as a result of the wind

- Installation schedule no later than two weeks after award of contract

- Operating and maintenance instructions

18.3 Final documentation

The contractor shall compile instruction manuals to Petrom Standards and supply them to the client after completing tank installation (when handing over the tank for the proof test). In any case, the following shall be provided as minimum:

o Client shall be furnished with prints of final certified drawings and data in quantity specified in the Contract or Material Requisition.

o After completion of erection, copies of storage tank manufacture record books and passports shall be furnished incorporating the following reports and data sheets, collated in hard binders, in quantity as specified in the contract or material requisition:

h. Manufacturer’s certification stating that tank is built to applicable Design Code.

i. Material Mill Test Reports.

j. Shop drawings showing “as built” dimensions, location of all openings for pipe connections, manholes, nozzles, nameplate and internal connections.

k. N.D.E. results.

l. Record of hydrostatic test.

m. Strength calculations.

n. Release Certificate.

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19 Warrant ies

See the General Procurement Conditions of the Petrom Group

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Annex 1 - Standards and regulat ions

OMV Standards

Petrom Standards/Specifications

General Procurement provisions

Welding

Non-destructive weld testing

Steel structures

Piping Materials Specification

Thermal Insulation

Corrosion Protection

Field Instruments

Tank foundations (or civil design)

AMERICAN PETROLEUM INSTITUTE (API)

API 650:2007 Welded Steel Tanks for Oil Storage

API RP 651 Cathodic Protection of Aboveground Petroleum Storage Tanks

API RP 2000 Venting Atmospheric and Low-Pressure Storage Tanks: Nonrefrigerated and Refrigerated

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ASTM

ASTM A105 Standard Specification for Carbon Steel Forgings for Piping Applications

ASTM A106 Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service

ASTM A234 Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service

EUROPEAN STANDARDS

SR EN 14015 Specification for the design and manufacture of site built, vertical, cylindrical, flat-bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperature and above.

EN ISO 15607 Specification and qualification of welding procedures for metallic materials - General rules

EN ISO 15609 Specification and Approval of Welding Procedures for Metallic Materials

EN ISO 15614- 1 Welding Procedure Tests For The Arc Welding Of Steel, Nickel and Nickel Alloys

SR EN 287-1:2004 Qualification test of welders - Fusion welding - Part 1: Steels

SR EN 10025-1:2005 Hot rolled products of structural steels - Part 1: General technical delivery conditions

SR EN 10028 Part 1 to 7 Flat products made of steels for pressure purposes

SR EN 10029:1995 Hot rolled steel plates 3 mm thick or above - Tolerances on dimensions, shape and mass

SR EN 10204:2005 Metallic products; Types of inspection documents

SR EN ISO 4014:2003 ver.eng. Hexagon head bolts - Product grades A and B

SR EN ISO 4032:2002 ver.eng. Hexagon nuts, style 1 – Product grades A and B

SR EN ISO 4034:2002 ver.eng. Hexagon nuts - Product grade C

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SR EN 27963:1995 Welds in steel - Calibration block No. 2 for ultrasonic examination of welds

SR EN ISO 898-1:2009 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs

SR EN ISO 898-6:2002 Mechanical properties of fasteners made of carbon steel and alloy steel-Part 6: Nuts with specified proof load values- Fine pitch thread

SR EN ISO 4759-1:2003 ver.eng. Tolerances for fasteners - Bolts, screws, studs and nuts; Product grades A, B and C

SR EN ISO 7089:2002 ver.eng. Plain washers - Normal series - Product grade A (ISO 7089:2000)

SR EN ISO 7090:2002 ver.eng. Plain washers, chamfered - Normal series - Product grade A (ISO 7090:2000)

SR EN ISO 7093-1:2003 ver.eng. Plain washers - Large series - Part 1:Product grade A

SR EN ISO 7093-2:2002 ver.eng. Plain washers - Large series - Part 2: Product grade C (ISO 7093-2:2000)

SR EN 26157-1:1999 Fasteners. Surface discontinuities. Part 1: Bolts, screws and studs for general requirements (ISO 6157-1:1988)

SR EN ISO 6157-2:2004 ver.eng. Fasteners - Surface discontinuities - Part 2: Nuts (ISO 6157-2:1995)

SR EN 10140:2007 ver.eng. Cold rolled narrow steel strip - Tolerances on dimensions and shape

SR EN 10216-1:2002 Seamless steel tubes for pressure purposes. Technical delivery conditions. Part 1: Non-alloy steel tubes with specified room temperature properties

SR EN 10216-4:2003 Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 4: Non-alloy and alloy steel tubes with specified low temperature properties

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SR EN 10217-1:2002 Welded steel tubes for pressure purposes. Technical delivery conditions. Part 1: Non-alloy steel tubes with specified room temperature properties

SR EN 10217-4:2003 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 4: Electric welded non-alloy steel tubes with specified low temperature properties

SR EN 10208-1:2009 ver.eng. Steel pipes for pipelines for combustible fluids - Technical delivery condi-tions - Part 1: Pipes of requirement class A

SR EN 10208-2:2009 ver.eng. Steel pipes for pipelines for combustible fluids - Technical delivery conditions - Part 2: Pipes of requirement class B

SR EN 10220:2003 ver.eng. Seamless and welded steel tubes - Dimensions and masses per unit length

SR EN 1092-1:2008 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges

STAS 8804/1-92 Non-alloy and alloy steel butt welding fittings. General technical requirements for quality

SR EN 1514-1:2003 ver.eng. Flanges and their joints - Dimensions of gaskets for PN-designated flanges - Part 1: Non-metallic flat gaskets with or without inserts

SR EN 1514-4:2004 ver.eng. Flanges and their joints - Dimensions of gaskets for PN-designated flanges - Part 4: Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges

STAS 1733-89 Non metallic gaskets. Gaskets for pressure- tight flat surfaces NP2, 5 NP6, NP10, NP16, NP25, NP40. Dimensions

STAS 1740-80 Cast iron and steel flanges. Gasket for packing surfaces with male and female cone joint NP 10…NP 100. Dimensions

EN 13565-1 Fixed fire-fighting systems - Foam systems - Part 1: Requirements

and test methods for components

SR EN ISO 14122 Parts 1 to 4 Safety of machinery - Permanent means of access to machinery

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SR EN 10204:2005 Metallic products - Types of inspection documents

SR EN 1714:2000 Non-destructive testing of welds - Ultrasonic testing of welded joints

SR EN 583-1:2001 Ultrasonic examination: Part 1 General principles

SR EN 583-2:2002 Ultrasonic examination: Part 2 Sensitivity and range setting

SR EN 10029:1995 Hot rolled steel plates 3 mm thick or above. Tolerances on dimensions, shape and mass

SR EN 62305-1:2006 Protection against lightning -- Part 1: General principles

SR EN 50164-1:2003 ver.eng. Lightning Protection Components (LPC). Parts 1 to 7: Requirements for connection components.

ISO

ISO 9001 Quality management systems — Requirements

American Society of Mechanical Engineers (ASME)

ASME Sec IX ASME Boiler and Pressure Vessel Code, Section IX, Welding and Brazing.

ANSI/ASME B16.5 Pipe Flanges and Flanged Fittings

ANSI/ASME B16.47 Large Diameter Steel Flanges

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Annex 2 - Summary of def ini t ions to be agreed before contract award process

Point

1.0 Define the maximum pressure and vacuum

3.0 Define the corrosion protection for non-accessible places

4.0 Define the type and design of the tank base

5.0 Define the maximum liquid level (HL, HH)

8.0 - Design of the drawoff sump

- Define the maximum weld height for tanks with floating roofs or tops

- Define the roof shape

- Locate the settling inspection marks

- Define the stubs for checking settling

- Design and location of the venting systems

- - Mixer nozzles - define the type and location

- Define the height of the adjacent platforms

- Define the lifting means

- Define the type of instruments for the automatic level indicators

- Determine the nozzle location for temperature, pressure tapping and maximum alarm

- Determine the location of the piping connections (nozzle position)

- Roof supports for floating roof tanks -define the design

- Define the type of venting systems for floating roof tanks

- Define the annulus seal for floating roof tanks

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- Calibration stubs for floating roof tanks – define the type and location

9.1 Define the type and installation of the roof drain valve for floating roof tanks

9.4 Define the support structure for the insulation

Define the scope and equipment for crushproof insulation

9.5 Define the scaffolding links

9.6 Define the cable trays

10.0 Define the sprinkler systems and connection locations

11.0 Define the foam extinguishing systems and connection locations

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Annex 3 – Tank Data sheet

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Annex 4 – Methods of Tank Erect ion

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20 List of revisions

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