Intsallation of Hot Tap Fittings SAEP0311 2003

7/21/2019 Intsallation of Hot Tap Fittings SAEP0311 2003

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Engineering Procedure

SAEP-311 29 January, 2003

Installation of Hot Tapped Connetions

Piping Standards Committee Members

Al-Sannaa, M.S., Chairman

Al-Dossary, M.B.

Al-Nasri, N.I.

Al-Sabti, R.A.

Al-Sharif, T.M.

Al-Teraiki, A.M.

Balhareth, N.M.

Chen, J.T.

Faley, !.".

Ismail, A.A.

#hashab, J.M.

#im, S.$.

"e%is, T.

Mahmo&, #.A.

M&llen, M.A.

'han, (.C.

Solaiman, M.).

Stark, !.D.

Previous Issue: 29 February, 2000 Next Planned pdate: ! Mar"#, 200$

%evised paragrap#s are indi"ated in t#e rig#t margin Page ! o& $$

Primary "onta"t: Mu#sen S' (l)Sannaa on p#one *+)--+9


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.o"ument %esponsibility: Piping S(/P)$!!

Issue .ate: 29 anuary, 200$

Next Planned pdate: ! Mar"#, 200$ Installation o& 1ot apped Conne"tions

Saudi Aramco DeskTop Standards

Table of Contents

1 Sope!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 2

2 Applia"le #ou$ents!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 2

3 Instrutions!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 3

% &esponsi"ilities!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 1%

Appendi' I - (ltrasoni T)i*ness

+easure$ents 1

Appendi' II - Hot Tap C)e*list!!!!!!!!!!!!!!!!!!!!!!!!!! 1

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1 Scope

This SAEP provides the installation procedures for hot tapping pipe, pressure

vessels and tanks. It assigns responsibilities for the work required and the safety

precautions to be taken. Any deviation to this procedure requires the approval of

the anager, !onsulting Services "epart#ent, "hahran.

2 Applicable Documents

$.% Saudi Ara#co &eferences

Saudi Ara#co Engineering Procedure

SAEP-310 Pipeline Repair and Maintenance

Saudi Ara#co Engineering Standards

SAES-A-004 Pressure Testing

SAES-L-052 Hot Tap onnections

SAES-L-05! Pressure Testing o" Plant Piping and Pipelines

SAES-#-010 #elding Re$uire%ents "or Pressure &essels

SAES-#-011 #elding Re$uire%ents "or 'n-Plot Piping

SAES-#-012 #elding Re$uire%ents "or Pipelines

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Saudi Ara#co Standard "rawings

A(-03!)1* Rein"orce%ent o" #elded (ranc+ onnections

A(-03!)15 ,etail o" Hea. #elding (oss "or T+readed

onnections

A(-03!!43 ,etail o" Hea. #elding (oss "or Soc/et #eld

onnections

Saudi Ara#co 'or#s and "ata Sheets

or% SA )235-E Hot Tap ,ata and +ec/listor% SA )!2)-E Hot TapStopple Rein"orce%ent alculation

S+eet

Saudi Ara#co (eneral Instructions

-00026100 #or/ Per%its

-00026102 Sa"et. Precautions "or Pressure Testing

-00026)11 ire and Sa"et. #atc+

-1)706001 At%osp+ere-Suppl.ing Respirators

$.$ Industry !odes and Standards

A#erican Petroleu# Institute

AP ST, 5*7 &ale nspection and Test

AP RP 2201 Procedures "or #elding or Hot Tapping on

E$uip%ent ontaining la%%a8les

A#erican Society of echanical Engineers)*oiler and Pressure +essel !ode

ASME SE & ,1 Pressure &essels

ASME (3163 Process Piping

ASME (3164 Li$uid Transportation S.ste%s "or

H.drocar8ons

ASME (3167 as Trans%ission and ,istri8ution Piping

S.ste%s

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3 Instructions

.% "efinitions

-ot Tap The technique of attaching a welded branch fitting to piping or

equip#ent in service, and creating an opening in that piping or equip#ent

by drilling or cutting a portion of the piping or equip#ent within the

attached fitting.

.$ (eneral &equire#ents

.$.% -ot tap connections shall be designed and installed to #eet all

require#ents of this SAEP, and SAES/0/12$, 3-ot Tap

!onnections3.

.$.$ The hot tapping operations are initiated, designed, and controlled

by

.$.$.% 4perations Engineering 4rgani5ation in the case of e6isting

facilities.

.$.$.$ Pro7ect anager with the approval of the Area 4perations

Superintendent and 4perations Engineering (eneral

Supervisor) Superintendent in the case of tying in newinstallations to e6isting facilities.

.$. The appropriate #anage#ent shall appoint an Initiating Engineer.

The Initiating Engineer shall be #ade responsible for the overall

coordination of the hot tapping activities. This is to ensure that

designers, construction)#aintenance installation unit, hot tap,

stopple and valve crew, operations and)or pro7ect #anage#ent,

engineering staff, and inspection staff cooperate closely during all

phases of the hot tapping operations.

.$.8 The Initiating Engineer shall identify the equip#ent in ter#s ofservice, location, pipe dia#eter, header and branch pressure

rating, and #aterial type and notify the -ot Tap, Stopple and

+alve 9nit of this infor#ation.

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.$.2 The construction or #aintenance units are responsible for

ensuring that approved welding procedures and qualified welders

are e#ployed. The Piping : +alves 9nit):!E")!S" shall

verify this.

.$.; 'or carbon steels with #ini#u# specified yield stresses less than

or equal to ;1 ksi, pre/approved welding procedures #ay be used.

.$.< 'or carbon steels with #ini#u# specified yield stresses greater

than ;1 ksi, the !onsulting Services "epart#ent shall be contacted

for welding procedure approval.

.$.= 'or hardenable or high strength steels and for piping where pipe

or fitting wall thickness requires preheat, the !onsulting Services

"epart#ent shall be contacted for welding procedure approval.

.$.> !o#pressed air piping and equip#ent shall not be hot tapped nor

welded while in service. &efer to SAES/0/12$, paragraph 8..

.$.%1 -ot tapping lines upstrea# of rotating equip#ent shall be avoided

unless such equip#ent is protected fro# the cuttings by #eans of

filters or traps. The nor#al in/line suction screens are not

considered adequate for this purpose.

.$.%% -ot tap connections are not allowed for certain cases ?refer to

SAES/0/12$paragraph 8.%@, unless a detailed design and

installation procedure has received prior approval fro# the

anager of !S" and concurrence fro# the 0oss Prevention

"epart#ent.

.$.%$ All hot tap connections, valves, and hot tap #achines shall be

pressure tested in accordance with this SAEP. ?&efer to Para. .=@

.$.% Precautions against electric shock, due to induced voltage, shall be

taken when installing hot tap connections on above ground

pipelines near high voltage power lines. &efer to SAEP/%1,3

Pipelines &epair and aintenance3.

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.$.%8 Adequate support of the hot tap #achine shall be provided to

prevent overstressing of the pipe and)or fitting, particularly in

cases where the hot tap sticker is not installed in a vertical position.

.$.%2 -ot tapping shall not be per#itted

a@ within 82< ## ?%= inches@ of a flange ?or threaded

connection@ as #easured fro# the toe of the reinforce#ent

sleeve, or split tee circu#ferential fillet weld to the toe of the

flange circu#ferential butt weld ?or the closest edge of the

threaded connection@

Commentary Note:

If this requirement can not be met the placement of the hot

tap may be positioned closer than 457 mm (18 inches)

proided there is enou!h room to allo" for the installation#

operation and remoal of the hot tap machine# and the

remoal of the pipin! or pipeline flan!e bolts$

b@ within %> ## ?1.


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.$.%;. -ot tapping is not per#itted on cone or floating roofs of

in/service tanks.

.$.%;.8 4n tanks, connections larger than $ inch BPS require

written approval of the anager, !S".

.$.%< Chen hot taps are being #ade to obtain coupons for -I!

deter#ination, the Saudi Ara#co 'or# SA Appropriate barricades and warning signs shall be posted around

the worksite to #ini#i5e the nu#ber of personnel in the work area

while perfor#ing the hot tapping operation.

.$.$1 !o#pact steel gate valves with e6tended body ends shall not be

used for hot tap connections.

. Precautions against -$S and other To6ic)-a5ardous aterials

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..% If a potential e6ists for a -ydrogen Sulfide ?or other To6ic

#aterial@ release at a work site, all personnel involved shall be

provided with an appropriate breathing apparatus. ?&efer to (I/

%


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.8 Preparation of -ot Tap Specification and Test !alculations

.8.% The Initiating Engineer shall provide 'or# SA


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.2 0ocate and Inspect -ot Tap Position

.2.% The Initiating Engineer shall #ake all necessary arrange#ents for

the preparation of hot tapping ?i.e., location, e6cavation, pipe

inspection, surface preparation, etc.@

.2.$ The Initiating Engineer shall arrange for a tea#, consisting of

hi#self, operations, the responsible inspector, and a representative

of the -ot Tap and Stoppling crew, to survey the general hot tap

location in order to specify and #ark the hot tap locations in

detail.

.2. The Initiating Engineer shall #ark of the e6act hot tap locations,

and #ark the hot tap nu#ber alongside each hot tap location,

ensuring the hot tap locations are at a position where the pipe out/

of/roundness does not e6ceed ##. ?4ut of roundness criteria

only applies to split tee or full encircle#ent sleeves@.

.2.8 The hot tap nu#ber is obtained fro# 'or# SA


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%hen hot tappin! components containin! non&ha'ardous material

such as "ater at less than 14 *+a (15 psi) and belo" ,5-C#

then the components "ith "all thic*nesses less than 5 mm ($.

inch) may be hot tapped proided precautions a!ainst burn&

throu!h are ta*en$ (/0I C2N3I/I2N /I 6I6 9 %9I6

/2 ;6 +2C663 /0 C3)$

.2.< If ultrasonic readings indicate a la#ination or evidence of

hydrogen induced cracking ?-I!@ da#age, the hot tap position

shall be relocated after consultation with the Initiating Engineer

and the responsible 4perations Engineering 4rgani5ation. !S"

and the proponent group shall be notified of this condition.

.2.= The Piping : +alves 9nit):!E")!S" shall co#plete Section

of for# SA


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"rawings and specifications prepared by the responsible

engineering group shall include the length, dia#eter, wall

thickness, flange rating and #aterial of the new connection plus

the type and di#ensions of the connection reinforce#ent, if

required ?&efer to Std. "wg. A*/1;@ and the Celd Procedure

Specifications approved by the !onsulting Services "epart#ent.

.;. After the responsible engineering group has obtained the

appropriate approvals, a record copy shall be retained in a

per#anent central file, and the design package forwarded to the

Initiating Engineer for construction.

.;.8 4nce approval is obtained, the Initiating engineer shall distribute

copies of each 'or# SA


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.;.; The Initiating Engineer is responsible for revising e6isting Saudi

Ara#co drawings, P:I"s, or preparing new drawings, as #ay be

required, as a result of the hot tap installation.

.< Safety &equire#ents

.$8/$@ shall

have recorded under the 34ther precaution3 section the #a6i#u#allowable line pressure, #ini#u# and #a6i#u# flow rates, and

level li#itations during welding)cutting plus the nu#ber of this

SAEP.

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.


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.=. a6i#u# hydrostatic test pressure applied to the branch ?or hot

tap@ connection shall be in accordance with SAES/0/12$,

paragraph D! is not per#itted unless approved by the anager,

!onsulting Services "epart#ent.

.=.2 -ot tap connections installed on hot lines where hydrostatic testing

with water is not practical shall be hydrostatically tested using

high te#perature turbine oil or silicone fluid, as follows

$ine Temperature %&drotest Fluid Stock 'o(

93:C to 290:C Tur"ine 4il 2;-001-330

2;-001-3%0

45er 290:C Silione


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Commentary Note:

Chec* to ensure compatibility of fluids used in hot tappin! "ith

that of the line bein! hot tapped$

.=.; A body and high pressure seat test ?on both sides of the seat@ shall

be perfor#ed in the shop on all hot tap valves prior to installation.

&esilient ?soft@ seat valves shall have 5ero leakage. +alves with

#etal to #etal seats shall #eet the leakage criteria of API ST" 2>=.

A back seat test and low pressure seat test is not required. A tag

shall be attached to the valve indicating test date, test pressure and

Inspectors na#e.

Commentary Note:

/his seat test does not apply to sand"ich ales$

.=.< After installation of the branch connection, but prior to installing

the reinforcing pad or full encircle#ent ring, a full hydrostatic

pressure test shall be applied to the branch connection. This test

pressure shall be the lower value shown in 8.8c or 8.8e on Saudi

Ara#co 'or# SA


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.=.> Install the hot tap valve and apply another high pressure closure

test ?seat test@ per para. .=.; above, with the valve in the closed

position. The test pressure shall be the lower value shown in 8.8c

or 8.8d on Saudi Ara#co 'or# SA


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.>.$ a6i#u# internal pressure of the piping)equip#ent during

welding shall be in accordance with SAES/0/12$paragraph 2. on

welding of pipelines under pressure. A positive pressure and flow

shall be #aintained at all ti#es while welding and hot tapping is in

progress.

.>. The #ini#u# flow rates per para. .>.8 or the #a6i#u#

attainable flow under nor#al working pressure, whichever is less,

shall be #aintained during all welding operations.

.>..% 'low in a line shall be #aintained while welding is being

perfor#ed, unless approved otherwise by the

4perations Superintendent. In certain cases, such as

flare lines with insufficient or inter#ittent flow, the line

shall be purged with stea#, inert gas, or hydrocarbon

gas. This stea# or gas shall be kept flowing through the

line during the entire welding operation.

.>..$ In syste#s where hydrocarbon and o6ygen #i6tures are

definitely not a possibility, flow is not required ?e.g., sea

water in7ection lines@. -owever, to weld with 3B4/

'04C3 conditions, the following #ust be satisfied

.>..$.% 'or new construction tie/ins to e6isting

lines, approval shall be obtained fro# the

responsible Pro7ect anager, (eneral

Supervisor)Superintendent 4perations

Engineering, and the 4perations

Superintendent.

.>..$.$ 'or nor#al #aintenance tie/ins to e6isting

syste#s not involving new construction,

approval shall be obtained fro# the

(eneral Supervisor)Superintendent

4perations Engineering, and the

4perations Superintendent.

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.>..$. Prior to and during any welding,

4perations shall verify a non/co#bustible

#i6ture in the line. This shall be stated in

the re#arks section of the Cork Per#it.

.>.8 a6i#u# and #ini#u# flow rates during hot tapping shall be as

follows

a4 5i6uid 7 0'0 m8se" minimum

o)P#ase '30 m8se" maximum

b4 as 0'0 m8se" minimum

9'!0 m8se" maximum

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however, if the branch connection si5e is less than 21F of the si5e

of the line being hot tapped, then the #ini#u# values do not apply

but a positive flow shall be #aintained.

Commentary Notes:

1) /$3$ %illiamson has established the aboe ma>imum flo" elocity

in lines durin! the hot tappin! operation$

.) mall diameter hot taps (i$e$# . inch and less) hae no ma>imum

or minimum flo" limitations$ +ressure requirements still apply$

.>.2 Chile hot tap work and pressure testing is in/progress, an operator

shall re#ain in a location where he can control operating

conditions such as flow, pressure, and liquid level within the li#its

specified in the hot tap design infor#ation. An additional operator

shall standby at the 7ob site while the work is in progress, if

dee#ed necessary by the 4perations Superintendent. !ontinuous

radio co##unications between the 7ob site operator and the

!ontrol &oo# is required.

.>.; Cork shall be i##ediately stopped when constant flow and

pressure as noted in paragraphs .>.$ and .>. cannot be

#aintained during the welding and hot tapping operations.

Pressure testing shall also stop if pressure in the header )

equip#ent is lost.

.%1 -ot Tap 'ittings)Sandwich +alve Installation &equire#ents

.%1.% The Initiating Engineer shall coordinate all activities.

.%1.$ The 4perations Superintendent shall ensure co#pliance with the

safety precautions arranged under paragraph .> of this SAEP,

including acceptance of the work per#it.

.%1. The Inspector shall perfor# the following

.%1..% +erify a !S" approved welding procedure specification

is utili5ed for installation of the connection ?&efer para.

.2.>@.

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.%1..$ +erify that .$ ## dia#eter cellulose weld electrodes

are utili5ed only for the root pass and low hydrogen

electrodes are used for all other passes for carbon steel

branch connection welds.

.%1.. Inspect the branch connection)split tee, before and

during the installation, for co#pliance with the

approved drawings and welding procedures.

.%1..8 +erify that a calibrated pressure gauge and relief valve

are properly installed for testing.

.%1..2 !onfir# that the hydrostatic test pressure for the

branch connection is correct at the ti#e of the test, as

prescribed in Section 8 of 'or# SA +aint>

Beneral &e=uire$ents are $et! Constr

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%!11!3 C)e* t)at t)e loation of t)e installation is t)at 4pers>+aint>

loation speified "y t)e initiatin. En.ineer 8it) t)e Constr

onurrene of t)e 4perations Supt!

%!11!% 4"tain an appro5ed Hot ?or* Per$it, Saudi Ara$o Init! En.>+aint>

CS#>

flus) 8it) t)e surfae of t)e pipe ta*in. are not to Constr

redue t)e pipe 8all t)i*ness! C)e* pipe 8all

t)i*ness ensurin. it does not 5iolate para! 3!!;!

%!11!; Ensure t)e pressure and flo8 re=uire$ents as identified Init En.>CS#>

in setion % of Constr

prior to any 8eldin.! 4pers

%!11! Po8er 8ire "rus) t)e area for atta)$ent 8elds to +aint>Constr>

re$o5e all traes of paint, rust and sale! T)e fit-up CS#

of t)e onnetion to t)e )eader s)all pro5ide for a

standard pipe "e5el and 1>1; in) $ini$u$ root .ap!

Install t)e nole or "oss onnetion usin. full

penetration 8elds in t)e e'at loation s)o8n on t)e

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appro5ed dra8in., usin. a =ualified 8elder and a CS#

appro5ed 8eldin. proedure! T)e Pipin. 7 Fal5es (nit>

+7CE#>CS# 8ill 5erify proper 8eld oint fit-up!

%!11! Ensure t)at t)e nole onnetions are not 8elded on CS#>Init En.>

t)e inside unless t)e )ot tap utter is at least one pipe +aint>Constr

sie s$aller t)an t)e nole! T)e utters so$eti$es

"rea* if t)e ut is $ade t)rou.) a 8eld!

%!11!9 Pre)e* t)e tappin. 5al5e and t)e )ot tap $a)ine Hot Tap (nit

to assure .ood opera"le ondition, inludin. t)e utter

and oupon retainin. de5ie!

%!11!10 Confir$ t)at t)e s)op ratin. test of t)e )ot tap $a)ine CS#>Hot Tap (nit

is urrent per para! 3!!2!

%!11!11 +ount t)e 5al5e on t)e fittin. ensurin. t)at its ali.n$ent CS#>Hot Tap (nit

is 8it)in t)e $anufaturerGs tolerane

%!11!12 Close t)e 5al5e and perfor$ t)e )ydrostati test +aint>Constr>Hot

aordin. to t)is instrution! Tap>CS#

%!11!13 C)e* t)e 5al5e "y openin. and t)e )ot tap $a)ine Hot Tap (nit>+aint>

for opera"ility and e'a$ine t)e ondition of t)e utter Constr

and oupon retainin. de5ie!

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%!11!1% +ount t)e )ot tap $a)ine on t)e 5al5e! Hot Tap (nit>+aint>

Constr

%!11!1 Ensure t)at t)e tappin. 5al5e is tested in aordane Hot Tap (nit>CS#

8it) para.rap) 3!!9 and 8ill easily pass t)e )ot tap

utter! T)is $ay re=uire .rindin. of t)e lu.s on t)e

5al5e seat rin.s to pro5ide ade=uate learane!

Ensure t)at t)e di$ension fro$ t)e fae of t)e 5al5e

flan.e to t)e surfae to "e )ot tapped 8ill per$it

enou.) utter tra5el to o$pletely ut out t)e oupon

and not tra5el to t)e opposite side of t)e )eader!

%!11!1; Apply )ydrostati and pneu$ati pressure tests to t)e Hot Tap (nit>ICS#>

)ot tap $a)ine, 5al5e, and 8elded onnetion in +aint>Constr

8it) t)e testin. proedure speified in t)is SAEP and

SAES--02, para.rap) !

%!11!1 Install and seal 8eld a t)readed plu. in t)e 8eld "oss +aint>Constr

on t)e onnetion after all testin. )as "een o$pleted!

&efer to para.rap) 3!!12

%!11!1 After asse$"ly of t)e )ot tap $a)ine on t)e tappin.

5al5e and "efore t)e tappin. operation is started6

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%!11!1!1 Co$pletely lose and t)en o$pletely open Hot Tap (nit

5al5e to ensure t)at it Is opera"le, and t)at

t)e utter an "e 8it)dra8n a suffiient

distane to per$it losure of t)e 5al5e!

%!11!1!2 Set t)e utter tra5el indiator to pre5ent o5er Hot Tap (nit

tra5el and onse=uent da$a.e to t)e opposite

side of t)e )eader "ein. )ot tapped!

%!11!19 #rill and ut oupon! Hot Tap (nit

%!11!20 &etrat t)e )ot tap $a)ine "orin. "ar! Hot Tap (nit

%!11!21 Close t)e 5al5e, pur.e 8it) nitro.en, if re=uired, and Hot Tap (nit

depressurie t)e )ot tap $a)ine adaptor!

%!11!22 &e$o5e t)e )ot tap $a)ine fro$ t)e line! Hot Tap (nit>

+aint>Constr

%!11!23 &e$o5e t)e oupon fro$ t)e pilot drill and ta. and Hot Tap (nit>

8ire t)e oupon to t)e tappin. 5al5e on t)e onnetion +aint>Constr

after )ot tap is o$pleted!

%!11!2% T)e oupon s)all "e re$o5ed only "y t)e 4perations 4pers

Super5isor and for8arded to t)e responsi"le 4perations

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Pipin. 7 Fal5es (nit>+7CE#>CS#!

%!11!2 Ensure t)at t)e o$pleted onnetion is "linded or Hot Tap (nit>CS#>

plu..ed "efore lea5in. t)e o" site! +aint>Constr

*e+ision Summar&

1 #een5er, 199;Editorial re5ision to on5ert dou$ent to ne8 for$at!

30 Septe$"er, 199 +inor re5ision to para.rap)s 2, 3!1, 3!2!9, 3!2!11, 3!2!1, 3!;!1, 3!;!2, 3!!3, 3!!; 7 3!9!2

29 April, 199 Added BI-10!001 in t)e referene!

29


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Appendi, I - .ltrasonic T/ickness 0easurements

1ot ap ;


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STICE* 0EAS.*E0E'T

+in6 +a'!6

CA

B

ED

FLOW

D E 4CATI4D-------#ESC&IPTI4D

Point A------------ran) Center

Cirle -----------ran) #ia$eter

Cirle C-----------&einfr! Pad #ia!

- ----------&ESP4DSIE PIPIDB 7 FAFES (DIT>+7CE#>CS#6 EDBIDEE&6

&E


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Appendi, II - %ot Tap C/ecklist

This checklist should be used as a re#inder to acco#plish the steps in order, but

should not be considered as including all preparation steps which #ay be dictated

by the particular circu#stances of the 7ob. It should be kept as a part of the final

docu#entation package.

04!ATI4BGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

"ATEGGGGGGGGGGGGGGGGGGGG

*efore Starting -ot Tap

%. -as the properly approved work per#it been obtainedH

$. "oes the tapping #achine have a suitable pressure and te#perature rating

for the 7obH

. -as the e6act location of the hot tap on the line or vessel been identified or

#arkedH

8. -as the area to be welded been inspected for thickness and freedo# fro#

la#ination or -I!H

2. -as the need for stress relieving the weld area been consideredH

;. "o the flanges, bolts, gaskets, pipe, and valve to be installed #eet the piping

code for the line or vessel to be hot tappedH

. -ave co#bustible and)or to6ic gas tests been conducted in the area of hot

tappingH

%1. -as the che#ical co#position of the contents in the line or vessel been

considered to avoid welding or equip#ent containing fla##able #i6tures,

hydrogen or che#icals which could affect #etal strengthH

%%. Is the contents in the line stable under heated conditions and free of o6ygenH

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%$. -as fire fighting equip#ent been providedH

%. -as suitable protective equip#ent been provided to all e6posed personnel in

the hot tap areaH

%8. Is the area to be hot tapped located below the liquid level of a tank or on a

line or piece of equip#ent in which fluid flow has been establishedH

*efore Starting Celding

%. Is preheat of the weld area requiredH

$. Is the fitting properly positioned so #isalign#ent of the hot tap #achine willnot occurH

*efore Starting !utting

%. -as the weld been testedH

$. -ave the hot tap valve, gaskets, and bolts been checked for possible leakageH

. -as the packing on the hot tap #achine been checkedH

8. -as the bleed off valve been checked to be sure it will hold and is not stopped

upH

2. Are all bolts on the cutter and pilot bit tight and is the coupon catcher on the

pilot bitH

;. Is the valve centered on the flangeH

. -as the pressure and te#perature of the contained #aterial been reduced as

#uch as the process operations will allowH

%1. Is there liquid or flowing gas in contact with the area to be hot tappedH

*efore &e#oving the -ot Tap achine

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%. 'ollow the #anufacturers instructions to be sure the boring bar is fully

retracted before closing the valve.

$. !lose the valve.

. ake sure any necessary nitrogen purging is co#pleted.

8. 4pen the bleeder valve and be sure all pressure is off the hot tap #achine

before re#oving bolts fro# the flange. If flow or pressure persists, the #ain

valve is probably leaking.

2. &e#ove the hot tap #achine fro# the tapping valve.

;. &e#ove the coupon and fro# the pilot drill and wire to the tapping valve.

Intsallation of Hot Tap Fittings SAEP0311 2003

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Transcript of Intsallation of Hot Tap Fittings SAEP0311 2003