iso 15649
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BRITISH STANDARD PD CEN/TR 14549:2004 Guide to the use of ISO 15649 and ANSI/ASME B31.3 for piping in Europe in compliance with the Pressure Equipment Directive The European Standard CEN/TR 14549:2004 has the status of a British Standard ICS 75.200 Licensed Copy: na na, University of Surrey - JISC, Wed Apr 13 18:48:46 BST 2005, Uncontrolled Copy, (c) BSI
Transcript of iso 15649
BRITISH STANDARD PD CEN/TR 14549:2004
Guide to the use of ISO 15649 and ANSI/ASME B31.3 for piping in Europe in compliance with the Pressure Equipment Directive
The European Standard CEN/TR 14549:2004 has the status of a British Standard
ICS 75.200
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PD CEN/TR 14549:2004
This British Standard was published under the authority of the Standards Policy and Strategy Committee on 4 April 2004
© BSI 4 April 2004
ISBN 0 580 43580 6
National forewordThis British Standard is the official English language version of CEN/TR 14549:2003.
The UK participation in its preparation was entrusted by Technical Committee PSE/17, Materials and Equipment for Petroleum, Petrochemical and Natural Gas Industries, to Subcommittee PSE/17/-/6, Processing Equipment and Systems, which has the responsibility to:
A list of organizations represented on this subcommittee can be obtained on request to its secretary.
Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.
This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.
Compliance with a British Standard does not of itself confer immunity from legal obligations.
— aid enquirers to understand the text;
— present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;
— monitor related international and European developments and promulgate them in the UK.
Summary of pages
This document comprises a front cover, an inside front cover, the CEN/TR title page, pages 2 to 54, an inside back cover and a back cover.
The BSI copyright notice displayed in this document indicates when the document was last issued.
Amendments issued since publication
Amd. No. Date Comments
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TECHNICAL REPORT
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
CEN/TR 14549
March 2004
ICS 75.200
English version
Guide to the use of ISO 15649 and ANSI/ASME B31.3 for pipingin Europe in compliance with the Pressure Equipment Directive
Guide pour l'utilisation de l'ISO 15649 et l'ANSI/ASMEB31.3 pour les tuyauteries en Europe en respectant la
Directive Equipements sous Pression
Erdöl- und Erdgasindustrien - Alternative für metallischeindustrielle Rohrleitungen
This Technical Report was approved by CEN on 21 December 2003. It has been drawn up by the Technical Committee CEN/TC 12.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATIONC OM ITÉ EUR OP ÉEN DE NOR M ALIS AT IONEUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.
Ref. No. CEN/TR 14549:2004: E
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CEN/TR 14549:2004 (E)
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Contents
Page
1 Scope ......................................................................................................................... .....................................4
2 Normative References .......................................................................................................... .........................5
3 Terms and definitions......................................................................................................... ...........................6
4 General....................................................................................................................... .....................................64.1 Scope of the PED ............................................................................................................ ...............................64.2 Responsibilities............................................................................................................ ..................................64.3 Fluid groups ................................................................................................................ ...................................64.4 Conformity assessment categories ............................................................................................ .................74.5 Conformity assessment procedures ............................................................................................ ...............94.6 Hazard analysis ............................................................................................................. ...............................10
5 Materials..................................................................................................................... ...................................105.1 Material selection and appraisal............................................................................................ .....................105.2 Material certification ...................................................................................................... ..............................11
6 Design and calculation........................................................................................................ ........................116.1 Allowable stresses.......................................................................................................... .............................116.2 Joint coefficients.......................................................................................................... ................................116.3 Isolation ................................................................................................................... .....................................11
7 Fabrication and installation .................................................................................................. ......................127.1 Permanent joining (e.g. Welding) ............................................................................................ ...................127.2 Traceability ................................................................................................................ ...................................127.3 Documentation............................................................................................................... ..............................127.3.1 Marking and labelling ..................................................................................................... .............................127.3.2 Operating instructions .................................................................................................... ............................137.3.3 Marking at take-off points ................................................................................................ ...........................137.3.4 Declaration of conformity ................................................................................................. ..........................13
8 Inspection and testing........................................................................................................ .........................138.1 Non-destructive tests ....................................................................................................... ...........................138.2 Final inspection............................................................................................................ ................................13
9 Safety devices ................................................................................................................ ..............................14
Annex A (informative) Checklist of major actions arising from the PED............................................................15
Annex B (informative) Key articles in the PED ......................................................................................................1 6B.1 Introduction ................................................................................................................ ..................................16B.2 Table of Key Articles in the PED ............................................................................................ ....................16
Annex C (informative) Clauses of this guide addressing essential requirements or other provisions of thePED................................................................................................................................................................21
Annex D (informative) Comparison of ISO 15649, ANSI/ASME B31.3 and PED annex I (Essential SafetyRequirements) .................................................................................................................. ............................23
D.1 Introduction ................................................................................................................ ..................................23D.2 Comparison tables........................................................................................................... ............................23D.2.1 Contents of each table .................................................................................................... ............................23D.2.2 How to use the tables ..................................................................................................... .............................24
Annex E (informative) Sources of further information and guidance .................................................................52E.1 Established guidelines ...................................................................................................... ..........................52E.1.1 General................................................................................................................... .......................................52E.1.2 European Commission (CEC) guidelines...................................................................................... ............52E.1.3 Other guidelines.......................................................................................................... .................................52E.2 Other sources of information ................................................................................................ .....................52E.2.1 Websites .................................................................................................................. .....................................52E.2.2 Published Guidance guidance documents ..................................................................................... ..........53E.2.3 Miscellaneous sources..................................................................................................... ...........................53E.3 Abbreviations ............................................................................................................... ................................53
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CEN/TR 14549:2004 (E)
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Foreword
This document CEN/TR 14549:2004 has been prepared by Technical Committee CEN/TC 12 “Materials,equipment and offshore structures for petroleum and natural gas”, the secretariat of which is held by AFNOR.
Annexes A, B, C, D and E are informative.
The European Pressure Equipment Directive (PED), Directive 97/23/EC, entered into force on 29th November 1999and has been mandatory throughout all Member States of the EU and the rest of the European Economic Area(EEA) on 30th May 2002. The prime purpose of the PED is to eliminate barriers to trade without detriment to safety.In May 1985, European Community Ministers agreed on a New Approach to Technical Harmonisation andStandards in order to fulfil the objective of an open market in Europe with free movement of goods. New ApproachDirectives such as the PED set out essential safety requirements which must be met.
This document has been developed in order to facilitate PED compliance with respect to the current industrypractice for piping that is based on ANSI/ASME B31.3.
This document is technically identical to the EEMUA publication 202 and its Amendment 1 published in May 2002.
This CEN Technical Report cannot provide a presumption of conformity with the PED, therefore the essential safetyrequirements of the PED should be followed and seen to be followed in full.
PED Issues and their solutions are continuing to develop, therefore users 1) * of this CEN Technical Report areadvised to make use of the references provided in this guide, in order to keep up to date via information publishedon the Internet World Wide Web.
1) In the text that follows, the term "user" often refers to the end user of pressure equipment, rather than to the user of thisGuide. The precise meaning should be clear from the context in which the tern is used.
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Introduction
This Guide explains how to use ISO 15649 and ANSI/ASME B31.3 while also complying with the EuropeanPressure Equipment Directive (PED), for piping in Europe Union and other EEA countries. This Guide is intendedto facilitate discussions between owner/purchaser, manufacturer/designer and notified body leading to conformitywith the PED in a consistent manner.
In general, the PED acts as a jurisdictional regulation with emphasis on general requirements, while for the detailsof design and construction, reference needs to be made to appropriate engineering standards. ANSI/ASME B31.3Code is a standard addressing design, fabrication, examination and testing of piping systems. Its use is subject tocontractual agreements between the owner and the manufacturer/ assembler of a piping system. The PED doesnot prohibit the use of ANSI/ASME B31.3 (or indeed of any code), however the requirements specified in the PEDshould be fulfilled.
Review of ANSI/ASME B31.3 against the Articles and the essential safety requirements (ESRs) of the PED hasshown that:
some Articles and ESRs are satisfied by ANSI/ASME B31.3;
some Articles and ESRs are not addressed by ANSI/ASME B31.3;
some aspects of ANSI/ASME B31.3 differ from the Articles and ESRs.
The PED is transposed and translated by each Member State into its national legislation. Users are advised toreview the translation implemented in the relevant Member State in order to ensure full regulatory compliance. (Therelevant document in the UK is The Pressure Equipment Regulations 1999, SI 1999 No 2001.) National legislationcan also include requirements outside the scope of the PED, for example for in-service inspection.
The full text of the PED can be found at the European Commission's PED website. The European Commission alsopublishes Guidelines approved by the Commission’s Working Group Pressure (WGP) that, while not legallybinding, are intended to provide more detail on how to apply the PED. References in the present document to"Guideline x/x" pertain to the WGP Guidelines. See also annex E.
Europia has published a guide for the oil industry on the use of the PED with particular emphasis on refineryoperations, whilst EEMUA has published a guide for purchasers of valves under the PED (EEMUA Publication196).
NOTE ON UNIT OF PRESSURE Throughout the text of this Guide, "bar" signifies gauge pressure (above atmospheric).
1 Scope
This Guide is intended for use in the petroleum, petrochemical and chemical industries. It identifies and defines aset of common additional and modified requirements to ISO 15649 and ANSI/ASME B31.3 necessitated by thePED. Additional guidance is provided by a suite of annexes (A to E) which are intended to be read independently,but in the context of the main text. These include an actions checklist, tables identifying key requirements of thePED and the corresponding clauses of the ISO/ANSI–ASME standards, and supplementary information.
ISO 15649 incorporates ANSI/ASME B31.3 by normative reference and also contains additional commoninternational practice. The relationships are illustrated in Figure 1.
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Figure 1 - Sketch of relationship
NOTE The scope of the PED itself is defined therein, in particular in the Preamble and in Article 1.
2 Normative References
This Technical Report incorporates by dated or undated reference, provisions from other publications. Thesereferences are cited at the appropriate places in the text, and the publications are listed hereafter. For datedreferences, subsequent amendments to or revisions of any of these publications apply to this Technical Report onlywhen incorporated in it by amendment or revision. For undated references the latest edition of the publicationreferred to applies (including amendments).
EN 764-4, Pressure equipment – Part 4: Establishment of technical delivery conditions for metallic materials.
EN 10204, Metallic products - Types of inspection documents.
ISO 15649:2001, Petroleum and natural gas industries – Piping.
Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the lawsof the Member States concerning pressure equipment (published in the Official Journal of the EuropeanCommunities No L 181, 9.7.97). (Note: the full text of the PED is online, see Ref. 4 below).
PED – Information Resource Centre – The European Commission DG-Enterprise website for the PED:http://ped.eurodyn.com/.
Guidelines related to the application of the Pressure Equipment Directive 97/23/EC, web page:http://ped.eurodyn.com/Guidelines/Guid-Intro.html.
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European Pressure Equipment Directive – A guide for the oil industry [Europia]. http://europia.standardsline.net/and connect to “Pressure Equipment Directive”.
ANSI/ASME B31.3:1999, Process Piping (including ANSI/ASME B31.3a – 2000 Addenda).
ASME QAI-1:1998, Qualifications for Authorized Inspection.
EEMUA Publication 196, Valves Purchasers' Guide to the PED.
3 Terms and definitions
For the purposes of this Technical Report, the terms and definitions given in ISO 15649:2001, ANSI/ASMEB31.3:1999 and the PED apply. Piping is defined in Article 1, sub-clause 2.1.2 of the PED applied.
4 General
4.1 Scope of the PED
The PED applies to the design, manufacture and conformity assessment of pressure equipment and assemblieswith a maximum allowable pressure greater than 0,5 bar. "Pressure equipment" means vessels, piping, safetyaccessories (devices to prevent overpressure, e.g. safety valves) and pressure accessories (operational deviceswith pressure-bearing housings, e.g. valves). "Assemblies" means several pieces of pressure equipmentassembled to constitute an integrated and functional whole (see Guidelines 3/8 and 3/9). This scope differs fromthe scope of ANSI/ASME B31.3, for example piping systems for less than 1 bar pressure and for non-flammable,non-toxic etc. service are excluded from ANSI/ASME B31.3.
The PED applies to new equipment. For further details see the PED Preamble and Article 1. Repairs to piping arenot covered by the PED, but may be covered by national regulations (Guideline 1/3). A modification where thecontent, main purpose and safety systems remain essentially the same, may be regarded as non-important andoutside the scope of the PED (Guideline 1/4).
For further guidance on assemblies, see also other Guidelines prefaced "3/"
4.2 Responsibilities
ISO 15649 and ANSI/ASME B31.3 specify responsibilities for owner, designer, manufacturer andfabricator/assembler. ANSI/ASME B31.3 does not address the issue of third party involvement, this would be arequirement of jurisdictional regulations.
However, under the PED the "manufacturer" is responsible for design including certain design conditions, formanufacture and for conformance with the PED. The manufacturer's responsibilities as defined in the PED couldfall to a designer, an importer, an owner, or an engineering contractor. The assigning of the manufacturer'sresponsibilities would be agreed by the parties to a contract, and may need to be defined for each component andassembly. (For further information on the responsibilities of the manufacturer, the reader is referred to theEuropean Commission's Guide to the Implementation of Directives based on the New Approach and the GlobalApproach.)
4.3 Fluid groups
The manufacturer is responsible for classifying the fluid as Group 1 or 2, as required by PED Article 9, inaccordance with Table 1 below.Li
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Table 1 – Fluid groups
Fluid group (Gas or Liquid) Fluids defined as
Group 1 – explosive
– extremely flammable
– highly flammable
– flammable (where the maximum allowabletemperature is above the flash point)
– very toxic
– toxic
– oxidizing
Group 2 All other fluids not in Group 1
Two-phase fluids should be treated as gases.
The fluid service categories (normal fluid service, category D, category M) as defined in annex M of ANSI/ASMEB31.3:1999 are not directly related to the fluid groups in PED. Note that Category M applies to toxic fluids,Category D to non-toxic, non-flammable, non-dangerous, low-pressure and moderate temperature fluids.
4.4 Conformity assessment categories
The manufacturer is responsible for classifying the piping into the appropriate conformity assessment category inaccordance with the PED Annex II, Tables 6, 7, 8, 9, (see Figure 2 below) depending on the state (gas or liquid),fluid group, pressure and nominal diameter (DN). The purpose of the category is to aid selection of an appropriateconformance assessment module, where Category I is the lowest and Category III is the highest shown in theTables for piping. Category IV (shown in tables for other equipment) may also be applied to piping (see 4.5 below).
The demarcation lines in the conformity assessment tables extracted from the PED (see Figure 2) indicate theupper limit for each category. (It should be noted that the figures are plotted on a log-log scale. For a linear-linearrepresentation, see EEMUA Pub. 196.)
PED Article 3, clause 3 requires that piping below the Category I limits be in accordance with the SoundEngineering Practice (SEP) of a Member State.
The fluid service categories (D, M) in ANSI/ASME B31.3 are not related to the conformity assessment categories inthe PED.
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Key
a) PED Annex II Table 6
b) PED Annex II Table 7
c) PED Annex II Table 8
d) PED Annex II Table 9
Figure 2 – Conformity assessment tables for piping
The PED includes the following qualifications to the Tables 6 and 7:
Table 6: Exceptionally, piping intended for unstable gases and falling within Categories I or II on the basis ofTable 6 should be classified in Category III.
Table 7: Exceptionally, all piping containing fluids at a temperature greater than 350 °C and falling withinCategory II on the basis of Table 7 should be classified in Category III.
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4.5 Conformity assessment procedures
Conformity assessment is required in order to demonstrate that the essential safety requirements are satisfied(PED Article 10).
The conformity assessment procedures are specified in modules available for each Category as set out in Tables 2and 3 below.
Table 2 – Conformity assessment modules
Category Modules
I A
II A1, D1, E1
III B1 + D, B1 + F, B + E, B + C1, H
IV B + D, B + F, G, H1
Table 3 – Description of conformity assessment modules
Module Design Production
A Technical documentation Internal production control
A1 Technical documentation Internal production control with monitoring of the finalassessment
B Type examination
B1 Design examination
C1 Monitoring of final assessment
D Quality assurance for production, final inspection and test
D1 Technical documentation Quality assurance for production, final inspection and test
E Quality assurance for final inspection and test
E1 Technical documentation Quality assurance for final inspection and test
F Product verification
G Unit verification Unit verification
H Quality assurance for design, manufacture, final inspection and test
H1 Quality assurance for design, manufacture, final inspection and test, with design examinationand monitoring of final assessment
The conformity assessment procedures corresponding to the modules are set out in PED Annex III. Theprocedures may include internal production control, third party inspection, and quality assurance. It is for themanufacturer to choose, depending on the Category, whether he wishes to opt for a module that requires full QAwith just auditing by a notified body, or for a module with full third party inspection, or for a module with acombination. The execution of the procedure is by the manufacturer, notified body, user inspectorate or third partyorganisation (PED Article 13), depending on the Category.
The owner or user may specify in the contract the module that is preferred. The manufacturer can always choose touse a module from a higher Category, e.g. from Category IV (PED Article 10, clause 1.4 and Guideline 2/11).
Piping in Category I and SEP does not require the involvement of notified bodies. For piping using modules forCategories II and III, a notified body will need to be involved, except for those modules where a user inspectorate ispermitted. User inspectorates are not permitted to apply any of the Category III modules (the highest pipingCategory). However Category IV permits the use of Module G, which can be applied by user inspectorates (PEDArticle 14, clause 6). It may therefore be to the user’s advantage to choose to apply that Category IV module toCategory III piping. It should be further noted that the use of a module from a higher Category does not change theclassification of the equipment being assessed (Guideline 2/11).
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For conformity assessment Modules A1, C1, F and G, designated user inspectorates may carry out the tasks ofnotified bodies within their own organisations. The CE marking is not to be affixed to pressure equipment andassemblies assessed by a user inspectorate.
For piping below the Category I limits conformity assessment is not required, but requirements for design,manufacture, instructions for use and markings should be in accordance with SEP of a Member State (see 4.4above). It is expected that the basic requirements of ANSI/ASME B31.3 will be considered generally acceptable inthe Member States.
Once conformity assessment has been completed, the manufacturer is required to affix the CE marking (PEDArticle 15) and draw up a declaration of conformity (PED Annex VII). It should be noted that the manufacturer is notrequired by the PED to provide the declaration of conformity to the user (see 7.3.4 below).
4.6 Hazard analysis
Hazard analysis is fundamental to the design process. Where the manufacturer of the equipment is not cognisantof overall HAZOP studies, he should be made aware of the scope of his responsibilities in respect of hazards onaccount of pressure.
After the manufacturer has ascertained or determined the operating conditions of the equipment (e.g. pressure,temperature, fluid etc.), and their limits, he should complete a hazard analysis (see Guideline 8/4) which will enablethe essential requirements which are applicable to the equipment to be identified.
The results of this analysis (applicable essential requirements in relation to the foreseeable operating conditions)shall be included in the technical documentation, but the inclusion of full details of the analysis in thedocumentation is not required by PED.
5 Materials
5.1 Material selection and appraisal
The current engineering practice where designers using ANSI/ASME B31.3 would normally select one of the code'slisted materials or established alternatives, and would base calculations on the material's listed properties, differsfrom that of the PED. Under the PED the manufacturer needs to adhere to the essential safety requirements of thatDirective by using appropriate materials (pipe, flanges, elbows, weldolets and other piping components) satisfyingone of the following conditions:
a) conforming to a harmonised standard;
b) covered by a European Approval of Materials (EAM) in accordance with PED Article 11;
c) evaluated by a Particular Material Appraisal (PMA) (see Guideline 9/13); PMAs may be carried out inaccordance with EN 764-4.
Materials that comply with harmonised standards mandated under the PED or have EAM status ((a) and (b) above)are published in the Official Journal of the European Communities and listed on the PED website. ASTM pipingmaterials are not generally included in the European harmonised standards.
For traditional ASME/ASTM materials the options are (b) and (c) above. However, to date (2003) materialsapplications submitted via the EAM route have been contested under the PED Article 11 process and are currentlyunsuccessful.
It is envisaged that the PMA route will be the one by which non-harmonised materials will be approved for theforeseeable future. Timing and process will need to be managed in order to avoid additional costs and projectdelays. The PMA is valid only for a particular application and is part of the technical documentation provided by themanufacturer. It should be noted that for pressurised parts to be used in Category III piping, the PMA needs to beperformed by the notified body responsible for undertaking the conformity assessment for the piping system.
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5.2 Material certification
For material certification see Guidelines 7/5, 7/7, 7/8. The material manufacturer shall provide a certificate ofspecific product control for main pressure bearing parts of piping in Categories II and III. For metallic materialsthese are inspection certificates EN 10204 type 3.1.B and type 3.1.C, and inspection reports EN 10204 type 3.2.Guideline 7/5 offers greater detail, Guideline 7/7 relates to quality control.
It should be noted that ANSI/ASME B31.3 does not require material test reports or other certification beyond thatdetailed in the material specifications.
For bolting parts used as a main pressure bearing part (flange bolting), EN 10204 type 3.1.B and type 3.1.C arerequired for piping in categories II and III. (Guideline 7/8).
6 Design and calculation
6.1 Allowable stresses
The provisions for allowable stresses and factors stated in ESR 7.1, PED Annex I, are a general rule, and themanufacturer may choose different values, provided that the choice is justifiable and consistent with good designprinciples, and achieves an equivalent level of safety. Much depends on the judgement of the manufacturer or,when a notified body is involved, agreement between notified body and manufacturer. If factors other than those inESR 7.1 have been used, owners should ask for the justification in the technical documentation.
The design basis in PED Annex I (7.1) is not quite the same as in ANSI/ASME B31.3. Generally for steelsANSI/ASME B31.3 uses the lower of ��������������������� ������������������������������ ��������������5/12 tensile strength. Therefore for many materials, the design stresses in ANSI/ASME B31.3 are moreconservative and may be used. However for austenitic steel the PED may be more conservative. (See TableD.7, 7.1 Allowable stresses.)
For creep conditions ANSI/ASME B31.3 uses 100 000 hour data, whilst the PED is silent on the criteria to be used.
6.2 Joint coefficients
The provisions for joint coefficients stated in ESR 7.2, PED Annex I, are also a general rule and, with regard toselecting values, the same approach should be adopted as for allowable stresses.
Where joint coefficients in the PED and in ANSI/ASME B31.3 are different, use of the lower value will beconservative.
Note that ANSI/ASME B31.3 gives longitudinal weld joint factors. The PED Annex I (7.2) does not restrict itself to longitudinalwelds, and its meaning should be agreed at the outset of a contract.
6.3 Isolation
Where Group 1 fluids are contained in the piping, appropriate means are to be provided to isolate any "take-off"pipes whose size represents a significant risk (see PED Annex I, 6(e)).
Positive isolation may be achieved in one of the following ways:
a) by removal of a flanged spool piece or valve and the fitting of blank flanges to the open ended pipes;
b) by (swung) line blind;
c) by a spade. The arrangements of spading points, together with venting, draining and purging facilities, shouldenable a section of line containing a spade to be checked as free from pressure before spade insertion orremoval.
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7 Fabrication and installation
7.1 Permanent joining (e.g. Welding)
For piping in Categories II and III, the joining procedures and personnel are to be approved by either of thefollowing, at the manufacturer’s discretion (see PED Annex I, sub-clause 3.1.2):
a notified body; or
a third-party organisation recognised for this purpose by a European Member State.
A list of such organisations is published in the Official Journal of the European Communities and may be found atthe PED website (Ref. 4) under "Who is who". An Authorized Inspector as defined in ASME QAI-1:1998 will not besufficient unless his organisation is also recognised as one of the above bodies under the PED.
Qualification (i.e. approval) of welding procedures and of the performance of welders should be in accordancewith ANSI/ASME B31.3. For Categories II and III piping, such approval needs to be in accordance with thepreceding paragraphs of this subsection.
7.2 Traceability
The manufacturer needs to ensure that suitable procedures are established and maintained for identifying thematerial making up those components of the equipment which contribute to pressure resistance, from receipt of thematerial, through production, up to the final test of the manufactured pressure equipment (see PED Annex I, sub-clause 3.1.5).
7.3 Documentation
7.3.1 Marking and labelling
ANSI/ASME B31.3 does not make reference to marking and labelling. Such requirements are dealt withelsewhere – in the United States by the local jurisdictions.
In Europe, in addition to the CE marking (accompanied by the notified body identification number where a notifiedbody is involved at the production control phase – see Article 15, clause 1), the PED requires the followinginformation to be provided by the manufacturer on an attached nameplate or, where allowed, in appropriatedocumentation (see PED Annex I, sub-clause 3.3):
a) name and address or other means of identification of the manufacturer(s);
b) year of manufacture;
c) identification of equipment (e.g. type, serial number);
d) essential maximum/minimum allowable operating limits (e.g. pressure, temperature);
e) depending on the type of pressure equipment, further information necessary for safe installation, operation oruse and, where applicable, maintenance and periodic inspection such as:
1) test pressure in bar;
2) date of pressure test;
3) fluid group;
4) nominal size, DN;
5) safety device set pressure in bar;
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6) the position and route of underground piping to facilitate safe maintenance, inspection or repair (see PEDAnnex I, clause 6(g)).
It may be desirable that the nameplate be also marked with the equipment Category (see 7.3.4).
7.3.2 Operating instructions
The PED requires piping to be accompanied, as far as is relevant, by instructions for the user regarding mounting,putting into service, use and maintenance (see PED Annex I, sub-clause 3.4, and Guideline 8/3). Note that thePED (Annex I, sub-clause 2.2.3 (b)) requires that features of the design relevant to the life of the equipment beincluded, while Guideline 8/3 recommends that the intended life and design code used should be stated. Ifexperience has shown that misuse might occur, suitable warnings need to be fixed to the piping.
7.3.3 Marking at take-off points
To minimise the risk of inadvertent discharge, the main piping needs to be clearly marked on the permanent side atall take-off points, indicating the fluid contained (see PED Annex I, clause 6 (f)).
7.3.4 Declaration of conformity
For any conformity assessment module or module combination applicable to piping, the manufacturer is required todraw up (but not to provide) a declaration of conformity (PED Annex VII). It should be noted that whilst thedeclaration of conformity is required to indicate the conformity assessment procedure followed, it is not required toindicate the equipment Category. Because it is permissible to use a conformity assessment procedure applicable toa Category higher than that of the equipment being assessed (4.5 above), it is recommended that equipmentCategory be always documented with, and preferably on, the declaration of conformity. Consideration may also begiven by the owner/ user to requiring that the equipment Category (including SEP where applicable) be marked onthe nameplate(s) and that copies of declarations of conformity be provided with the relevant equipment.
In addition to any declarations of conformity that may have been drawn up for items of pressure equipment by themanufacturers of those items, the manufacturer of an assembly is required to perform a global assessment (seePED Article 10, clause 2) and draw up a "global" declaration of conformity. However if assembly is done on site andunder the responsibility of the user, the global conformity assessment procedure would not normally be carried outand no CE mark would be affixed. (See PED recital 5 and Guideline 3/1.)
8 Inspection and testing
8.1 Non-destructive tests
Non-destructive testing terminology in ANSI/ASME B31.3 is different from that in the PED (e.g. "spot" versus"random"), therefore care should be taken to ensure that all parties have a common understanding of therequirements.
For piping in Category III, the personnel performing non-destructive tests of permanent joints need to be approvedby a third-party organisation recognised for this purpose by a European Member State, see PED Annex I, 3.1.3.
A list of such organisations is published in the Official Journal of the European Communities and may be found atthe PED website under "Who is who".
8.2 Final inspection
Piping needs to undergo a final inspection to assess, visually and by review of the accompanying documents,compliance with the PED requirements: see PED Annex I, sub-clause 3.2.1, and Guideline 6/2. ANSI/ASME B31.3inspection requirements cover all the PED requirements except for the requirement to examine technicaldocumentation.
ANSI/ASME B31.3 requires an inspection by the owner’s inspector. The PED requirements depend on theconformity assessment module, for example with inspection by a notified body or user inspectorate, type approval,or quality assurance system.
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For assemblies, the final assessment needs to include a check of the safety devices to verify compliance with therequirements of PED Annex I, sub-clause 2.10.
9 Safety devices
With respect to safety devices, the requirements of the PED and of ANSI/ASME B31.3 are similar.
The PED requires CE-marked safety devices to be classified as Category IV, unless the device is manufactured forspecific equipment classified in a lower Category (PED Annex II, clause 2).
The PED requires that pressure limiting devices need to be so designed that the pressure will not permanentlyexceed the maximum allowable pressure and a short duration pressure surge will not exceed 10 % of the maximumallowable pressure. The 10 % pressure surge restriction does not apply to the fire case, see Guideline 5/2.
The allowances for pressure and temperature variations in 302.2.4 (f) of ANSI/ASME B31.3:1999 are notapplicable.
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Annex A(informative)
Checklist of major actions arising from the PED
Table A.1 - Checklist of major actions
Action Reference clausein this guide
� Determine if the piping is within the scope of the PED 4.1
� Identify the “manufacturer” and determine and assign his responsibilities, atthe start of a contract, for each component and assembly
4.2
� Determine fluid Groups 4.3
� Determine Category(ies) 4.4
� Choose conformity assessment modules (PED Article 10) 4.5
� Determine extent of notified body involvement 4.5
� Perform hazard analysis in order to determine the applicable ESRs 4.6
� Ensure that materials to be used in pressurised parts fulfil one of therequirements given in PED Annex I, 4.2 (b)
5.1
� Ensure that materials to be used in pressurised parts are traceable (PEDAnnex I, 3.1.5)
7.2
� Ensure third party approval for welding procedures and welder qualificationfor Categories II and III (PED Annex I, 3.1.2), and for NDE personnelqualification for Category III (PED Annex I, 3.1.3).
7.1
� Manufacturer to draw up global declaration of conformity and affix CEmarkings.
4.5, 7.3.1 and 7.3.4
� Manufacturer to identify marking and labelling requirements of the PEDESRs
7.3
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Annex B(informative)
Key articles in the PED
B.1 Introduction
This annex provides a guide to those Articles of the PED which differ from requirements in ISO 15649 andANSI/ASME B31.3; these are termed "key articles" in this annex.
Annex D provides a similar guide to the ESRs of the PED.
B.2 Table of Key Articles in the PED
For each of the key PED Articles, Table B.1 identifies the clauses of ISO 15649, ANSI/ASME B31.3 and this Guidethat are relevant to PED compliance. The required actions are listed under Notes/Actions Required.
Table B.1 is based on ANSI/ASME B31.3 – 1999 Edition, Process Piping, including ANSI/ASME B31.3a –2000 Addenda.
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Tab
le B
.1 –
Key
art
icle
s in
PE
D
PE
D C
ompl
ianc
e
PE
D A
rtic
leA
NS
I/AS
ME
B31
.3R
efer
ence
Not
es /
Act
ions
Req
uire
dIS
O 1
5649
clau
seG
uide
clau
se
13
The
follo
win
g ar
e ex
clud
ed fr
om th
e sc
ope
of th
is D
irect
ive:
300.
1Id
entif
y “s
tand
ard
pres
sure
equ
ipm
ent”
NO
T e
xclu
ded
from
PE
D1.
41
3.1
Pip
elin
es c
ompr
isin
g pi
ping
or
a sy
stem
of
pipi
ng d
esig
ned
for
the
conv
eyan
ce
of
any
fluid
or
su
bsta
nce
to
or
from
an
inst
alla
tion
(ons
hore
or
offs
hore
) st
artin
g fr
om a
nd in
clud
ing
the
last
is
olat
ion
devi
ce
loca
ted
with
in
the
conf
ines
of
th
ein
stal
latio
n,
incl
udin
g al
l th
e an
nexe
d eq
uipm
ent
desi
gned
spec
ifica
lly
for
pipe
lines
. T
his
excl
usio
n do
es
not
appl
y to
stan
dard
pre
ssur
e eq
uipm
ent
such
as
may
be
foun
d in
pre
ssur
ere
duct
ion
stat
ions
or
com
pres
sion
sta
tions
;
Iden
tify
pipi
ng e
tc w
hich
will
be
subj
ect t
o P
ED
.
See
als
o G
uide
lines
1/2
8 an
d 1/
29.
31
The
pre
ssur
e eq
uipm
ent r
efer
red
to in
1.1
, 1.2
, 1.3
and
1.4
mus
tsa
tisfy
the
esse
ntia
l req
uire
men
ts s
et o
ut in
Ann
ex I:
300.
1.3(
a)Id
entif
y pi
ping
etc
. w
hich
will
be
subj
ect
to P
ED
Ann
ex I
Ess
entia
lS
afet
y R
equi
rem
ents
or
othe
r na
tiona
l sta
ndar
ds/g
uide
lines
Ann
exe
D
1.3
Pip
ing
inte
nded
for:
a)ga
ses,
liq
uefie
d ga
ses,
ga
ses
diss
olve
d un
der
pres
sure
,va
pour
s an
d th
ose
liqui
ds
who
se
vapo
ur
pres
sure
at
th
em
axim
um a
llow
able
tem
pera
ture
is
grea
ter
than
0,5
bar
abo
veno
rmal
atm
osph
eric
pre
ssur
e (1
013
mba
r) w
ithin
the
fol
low
ing
limits
:
—fo
r flu
ids
in G
roup
1 w
ith a
D
N
grea
ter
than
25
(Ann
ex
II,T
able
6);
—fo
r flu
ids
in G
roup
2 w
ith a
DN
gre
ater
tha
n 32
and
a p
rodu
ct o
fP
S a
nd D
N g
reat
er th
an 1
000
bar
(A
nnex
II, T
able
7);
b)liq
uids
hav
ing
a va
pour
pre
ssur
e at
the
max
imum
allo
wab
lete
mpe
ratu
re o
f not
mor
e th
an 0
,5 b
ar a
bove
nor
mal
atm
osph
eric
pres
sure
(1
013
mba
r), w
ithin
the
follo
win
g lim
its:
—fo
r flu
ids
in G
roup
1 w
ith a
DN
gre
ater
tha
n 25
and
a p
rodu
ct o
fP
S a
nd D
N g
reat
er th
an 2
000
bar
(A
nnex
II, T
able
8);
—fo
r flu
ids
in G
roup
2 w
ith a
PS
gre
ater
than
10
bar,
a D
N g
reat
erth
an 2
00 a
nd a
pro
duct
of
PS
and
DN
gre
ater
tha
n 5
000
bar
(Ann
ex II
, Tab
le 9
).
(to
be c
ontin
ued)
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Tab
le B
.1 (
cont
inue
d)
PE
D C
ompl
ianc
e
PE
D A
rtic
leA
NS
I/AS
ME
B31
.3R
efer
ence
Not
es /
Act
ions
Req
uire
dIS
O 1
5649
clau
seG
uide
clau
se
3 (con
tinue
)1.
4S
afet
y an
d pr
essu
re a
cces
sorie
s in
tend
ed fo
r eq
uipm
ent
cove
red
by 1
.1, 1
.2 a
nd 1
.3 in
clud
ing
whe
re s
uch
equi
pmen
tis
inco
rpor
ated
into
an
asse
mbl
y.
2T
he a
ssem
blie
s de
fined
in
Art
icle
1,
sect
ion
2.1.
5, w
hich
incl
ude
at l
east
one
ite
m o
f pr
essu
re e
quip
men
t co
vere
d by
sect
ion
1 of
thi
s A
rtic
le a
nd w
hich
are
lis
ted
in 2
.1,
2.2
and
2.3
of t
his
Art
icle
mus
t sa
tisfy
the
ess
entia
l req
uire
men
ts s
etou
t in
Ann
ex I.
2.1
Ass
embl
ies
inte
nded
for
gen
erat
ing
stea
m o
r su
perh
eate
dw
ater
at
a te
mpe
ratu
re h
ighe
r th
an 1
00 °
C c
ompr
isin
g at
leas
t on
e Ite
m
of
fired
or
ot
herw
ise
heat
ed
pres
sure
equi
pmen
t pre
sent
ing
a ris
k of
ove
rhea
ting
2.2
Ass
embl
ies
othe
r th
an
thos
e re
ferr
ed
to
in
2.1,
if
the
man
ufac
ture
r in
tend
s th
em t
o be
pla
ced
on t
he m
arke
t an
dpu
t int
o se
rvic
e as
ass
embl
ies.
2.2
Ass
embl
ies
othe
r th
an
thos
e re
ferr
ed
to
in
2.1,
if
the
man
ufac
ture
r in
tend
s th
em t
o be
pla
ced
on t
he m
arke
t an
dpu
t int
o se
rvic
e as
ass
embl
ies.
2.3
By
way
of
dero
gatio
n fr
om t
he in
trod
ucto
ry p
arag
raph
to
this
sect
ion,
ass
embl
ies
inte
nded
for
gen
erat
ing
war
m w
ater
at
tem
pera
ture
s no
t gr
eate
r th
an 1
10°C
whi
ch a
re m
anua
lly f
edw
ith s
olid
fue
ls a
nd h
ave
a P
S.V
gre
ater
tha
n 50
bar
.L m
ust
com
ply
with
the
ess
entia
l re
quire
men
ts r
efer
red
to i
n 2.
10,
2.11
, 3.4
, 5 (
a) a
nd 5
(d)
of A
nnex
I.
3P
ress
ure
equi
pmen
t and
/or
asse
mbl
ies
belo
w o
r eq
ual t
o th
elim
its in
sec
tions
1.1
, 1.2
and
1.3
and
sec
tion
2 re
spec
tivel
ym
ust b
e de
sign
ed a
nd m
anuf
actu
red
in a
ccor
danc
e w
ith th
eso
und
engi
neer
ing
prac
tice
of a
Mem
ber
Sta
te in
ord
er to
ensu
re s
afe
use.
Pre
ssur
e eq
uipm
ent a
nd/o
r as
sem
blie
sm
ust b
e ac
com
pani
ed b
y ad
equa
te in
stru
ctio
ns fo
r us
e an
dm
ust b
ear
mar
king
s to
per
mit
iden
tific
atio
n of
the
man
ufac
ture
r or
of h
is a
utho
rised
rep
rese
ntat
ive
esta
blis
hed
with
in th
e C
omm
unity
. Suc
h eq
uipm
ent a
nd/o
r as
sem
blie
sm
ust n
ot b
ear
the
CE
mar
king
ref
erre
d to
in A
rtic
le 1
5.
300.
1.3.
(a)
“Sou
nd e
ngin
eerin
g pr
actic
e” t
o be
def
ined
at
the
star
t of
a c
ontr
act
e.g.
AN
SI/A
SM
E B
31.3
. See
Gui
delin
e 9/
11.
24.
5
(to
be c
ontin
ued)
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Tab
le B
.1 (
cont
inue
d)
PE
D C
ompl
ianc
e
PE
D A
rtic
leA
NS
I/AS
ME
B31
.3R
efer
ence
Not
es /
Act
ions
Req
uire
dIS
O 1
5649
clau
seG
uide
clau
se
9C
lass
ifica
tion
of p
ress
ure
equi
pmen
t30
0 (b
) (1
)C
ateg
orie
s to
be
defin
ed b
y m
anuf
actu
rer
4.4
1P
ress
ure
equi
pmen
t ref
erre
d to
in A
rtic
le 3
(1)
sha
ll be
clas
sifie
d by
cat
egor
y in
acc
orda
nce
with
Ann
ex II
, acc
ordi
ngto
asc
endi
ng le
vel o
f haz
ard.
10C
onfo
rmity
ass
essm
ent
Cha
pter
VI
Con
form
ity a
sses
smen
t an
d in
volv
emen
t of
not
ified
bod
ies
to b
est
ated
by
man
ufac
ture
r4.
5
1.1
Bef
ore
plac
ing
pres
sure
eq
uipm
ent
on
the
mar
ket,
the
man
ufac
ture
r sh
all
subj
ect
each
ite
m o
f eq
uipm
ent
to o
ne o
fth
e co
nfor
mity
ass
essm
ent
proc
edur
es d
escr
ibed
in
Ann
ex I
II,ac
cord
ing
to th
e co
nditi
ons
give
n in
this
Art
icle
.
11E
urop
ean
appr
oval
for
mat
eria
lsR
eque
sted
by
man
ufac
ture
r or
not
ified
bod
y5
1E
urop
ean
appr
oval
for
mat
eria
ls, a
s de
fined
in
Art
icle
1S
ectio
n 2.
9, s
hall
be is
sued
at
the
requ
est
of o
ne o
r m
ore
man
ufac
ture
rs o
f m
ater
ials
or
equi
pmen
t, by
one
of
the
notif
ied
bodi
es
refe
rred
to
in
A
rtic
le
12
spec
ifica
llyde
sign
ated
for
tha
t ta
sk.
The
not
ified
bod
y sh
all d
eter
min
ean
d pe
rfor
m,
or
arra
nge
for
the
perf
orm
ance
of
, th
eap
prop
riate
ins
pect
ions
and
tes
ts t
o ce
rtify
the
con
form
ityof
th
e ty
pes
of
mat
eria
l w
ith
the
corr
espo
ndin
gre
quire
men
ts o
f th
is
Dire
ctiv
e;
in
the
case
of
m
ater
ials
reco
gnis
ed a
s be
ing
safe
to u
se b
efor
e 29
Nov
embe
r 19
99,
the
notif
ied
body
sha
ll ta
ke a
ccou
nt o
f th
e ex
istin
g da
taw
hen
cert
ifyin
g su
ch c
onfo
rmity
.
14U
ser
insp
ecto
rate
s34
0.1
Use
r in
spec
tora
tes
need
to b
e au
thor
ised
by
the
Mem
ber
Sta
te4.
5
1B
y w
ay o
f de
roga
tion
from
the
pro
visi
ons
rela
ting
to t
he t
asks
carr
ied
out
by t
he n
otifi
ed b
odie
s, M
embe
r S
tate
s m
ay a
utho
rise
inth
eir
terr
itory
the
pla
cing
on
the
mar
ket,
and
the
putti
ng i
nto
serv
ice
by u
sers
, of p
ress
ure
equi
pmen
t or
asse
mbl
ies
refe
rred
to in
Art
icle
1of
w
hich
co
nfor
mity
w
ith
the
esse
ntia
l re
quire
men
ts
has
been
asse
ssed
by
a us
er i
nspe
ctor
ate
desi
gnat
ed i
n ac
cord
ance
with
the
crite
ria r
efer
red
to in
par
agra
ph 8
.
(to
be c
ontin
ued)
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Tab
le B
.1 (
conc
lude
d)
PE
D C
ompl
ianc
e
PE
D A
rtic
leA
NS
I/AS
ME
B31
.3R
efer
ence
Not
es /
Act
ions
Req
uire
dIS
O 1
5649
clau
seG
uide
clau
se
15C
E m
arki
ngC
E m
arki
ng a
pplie
d by
man
ufac
ture
r4.
5
1T
he C
E m
arki
ng c
onsi
sts
of th
e in
itial
s 'C
E' i
n ac
cord
ance
with
the
mod
el in
Ann
ex V
I.
The
CE
mar
king
sha
ll be
acc
ompa
nied
by
the
iden
tific
atio
n nu
mbe
r,as
ref
erre
d to
in A
rtic
le 1
2 (1
), o
f the
not
ified
bod
y in
volv
ed a
t the
prod
uctio
n co
ntro
l pha
se.
2T
he C
E m
arki
ng s
hall
be a
ffixe
d in
a v
isib
le,
easi
ly l
egib
le a
ndin
delib
le fa
shio
n to
eac
h:
—ite
m o
f pre
ssur
e eq
uipm
ent r
efer
red
to in
Art
icle
3 (
1); o
r
—as
sem
bly
refe
rred
to in
Art
icle
3 (
2);
whi
ch i
s co
mpl
ete
or i
s in
a s
tate
per
mitt
ing
final
ass
essm
ent
asde
scrib
ed in
sec
tion
3.2
of A
nnex
I.
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CEN/TR 14549:2004 (E)
21
Annex C(informative)
Clauses of this guide addressing essential requirements or otherprovisions of the PED
Harmonised European Standards are prepared under a mandate given to the Comité Européen de Normalisation(European Committee for Standardization – CEN) by the European Commission to support the essentialrequirements of EU Directives. Under an agreement between the EU and the European Free Trade Association(EFTA) states of Iceland, Liechtenstein and Norway, all of which together form the European Economic Area(EEA), all New Approach directives (of which the PED is one) also apply to the EFTA EEA States.
The harmonised standards prepared in support of the PED (Directive 97/23/EC) generally include an “Annex ZA" inwhich the clauses in the standard which address essential requirements and other provisions of the Directive arecross referred to the particular ESRs/ provisions in the Directive itself. Compliance with the clauses of aharmonised standard listed in its Annex ZA is one means of demonstrating compliance with the directive’s ESRs.
The present document has been developed because there is no harmonised European Standard available thatparallels the requirements of ISO 15649 and ANSI/ASME B31.3. Table C.1 follows the format of a typicalannex ZA.
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Table C.1 – Comparison between this Guide and Directive 97/23/EC
Clauses ofthis Guide Content Essential requirements of Directive 97/23/EC
1 Scope Annex I, All requirements of ISO 15649 except thoselisted below
4.2 Responsibilities Annex I, Preliminary observations
5 Materials Annex I, 4.2 (b)
4.2 (c)
6.1 Allowable stresses Annex I, 7
6.2 Joint coefficients Annex I, 7
6.3 Isolation Annex I, 6 (e)
7.1 Permanent joining Annex I, 3.1.2
7.2 Traceability Annex I, 3.1.5
7.3 Documentation Annex I, 3.3
6 (f)
6 (g)
8.1 Non-destructive tests Annex I, 3.1.3
8.2 Final inspection Annex I, 2.10
3.2.1
3.2.3
9 Safety devices Annex I, 2.11.2
7.3
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CEN/TR 14549:2004 (E)
23
Annex D(informative)
Comparison of ISO 15649, ANSI/ASME B31.3 and PED annex I (EssentialSafety Requirements)
D.1 Introduction
This annex provides a clause-by-clause guide for compliance with the essential safety requirements (ESRs) set outin Annex I of the Pressure Equipment Directive (PED). Compliance is indicated either by reference to the relevantclauses of ISO 15649 or, where qualification is required, to the relevant clauses of this Guide. The tables also showthe relevant clauses of ANSI/ASME B31.3.
The tables in this annex are based on the current ANSI/ASME B31.3 [ASME B 31.3:1999, Process Piping,including ASME B31.3a:2000 Addenda].
The tables are derived from the work of CEN/TC 12 AH5 2) that was issued as document CEN/TC 12 AH5 N11within document CEN/TC 12 N 296 in 2000. The AH5 document was developed from a report originallycommissioned by the EEMUA Piping Systems Committee. That report was a comparison between ANSI/ASMEB31.3 [ASME B 31.3:1996, Process Piping, including ASME B31.3a: 1996 Addenda and ASME B31.3b:1997Addenda] and the EC Pressure Equipment Directive (97/23/EC). The purpose of the original comparison was todetermine the extent to which ANSI/ASME B31.3 satisfied the essential safety requirements of the PED.
D.2 Comparison tables
D.2.1 Contents of each table
Each table is dedicated to a particular section or sections of the PED Annex I, Essential Safety Requirements, asfollows:
This Guide PED Annex I
TableReference Section N° Title
D.1 — Preliminary observations
D.2 1 General
2 Design
D.3 3 Manufacturing
D.4 4 Materials
D.5 5 Fired or otherwise heated pressure equipment with a risk ofoverheating as referred to in article 3 (1) of the PED
D.6 6 Piping as referred to in article 3, section 1.3 of the PED
D.7 7 Specific quantitative requirements for certain pressure equipment
2) European Committee for Standardization, Technical Committee 12, ad-hoc group 5.
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24
D.2.2 How to use the tables
For each of the ESRs, the last two columns of the tables identify the clauses of ISO 15649 and this Guide that arerelevant to PED compliance.
The related paragraphs of ANSI/ASME B31.3 are also shown for information. If B31.3 already satisfies the PEDthis is signified by a reference to ISO 15649:2001, sub-clause 4.1 (which makes normative reference to ASMEB31.3) in the penultimate column.
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Tab
le D
.1 –
ES
Rs:
Pre
limin
ary
obse
rvat
ions
Not
es /
Com
men
tsP
ED
Com
plia
nce
PE
DA
nnex
IP
relim
inar
y ob
serv
atio
nsA
NS
I/AS
ME
B31
.3R
efer
ence
AN
SI/A
SM
E B
31.3
is r
efer
red
to b
elow
as
“the
Cod
e”IS
O 1
5649
clau
seG
uide
clau
se
1T
he o
blig
atio
ns a
risin
g fr
om th
e es
sent
ial r
equi
rem
ents
list
ed in
this
Ann
ex fo
r pr
essu
re e
quip
men
t als
o ap
ply
to a
ssem
blie
s w
here
the
corr
espo
ndin
g ha
zard
exi
sts.
AN
SI/A
SM
E B
31.3
sta
tes
resp
onsi
bilit
ies
as fo
llow
s:4.
2
300
Gen
eral
sta
tem
ents
(b)
Res
pons
ibili
ties
(1)
Ow
ner.
The
ow
ner
of a
pip
ing
inst
alla
tion
shal
l ha
veov
eral
l res
pons
ibili
ty fo
r co
mpl
ianc
e w
ith th
is C
ode,
and
for
esta
blis
hing
th
e re
quire
men
ts
for
desi
gn,
cons
truc
tion,
exa
min
atio
n, in
spec
tion,
and
test
ing
whi
chw
ill
gove
rn
the
entir
e flu
id
hand
ling
or
proc
ess
inst
alla
tion
of w
hich
the
pip
ing
is a
par
t. T
he o
wne
r is
also
res
pons
ible
for
des
igna
ting
pipi
ng i
n ce
rtai
n flu
idse
rvic
es. [
See
par
as. 3
00(d
)(4)
and
(5)
and
300
(e)
.]
(2)
Des
igne
r. T
he d
esig
ner
is r
espo
nsib
le to
the
owne
r fo
ras
sura
nce
that
the
engi
neer
ing
desi
gn o
f pip
ing
com
plie
s w
ith th
e re
quire
men
ts o
f thi
s C
ode
and
with
any
addi
tiona
l req
uire
men
ts e
stab
lishe
d by
the
owne
r.
2T
he e
ssen
tial r
equi
rem
ents
laid
dow
n in
the
Dire
ctiv
e ar
eco
mpu
lsor
y. T
he o
blig
atio
ns la
id d
own
in th
ese
esse
ntia
lre
quire
men
ts a
pply
onl
y if
the
corr
espo
ndin
g ha
zard
exi
sts
for
the
pres
sure
equ
ipm
ent i
n qu
estio
n w
hen
it is
use
d un
der
cond
ition
sw
hich
are
rea
sona
bly
fore
seea
ble
by th
e m
anuf
actu
rer.
300
Man
ufac
ture
r,
Fab
ricat
or,
and
Ere
ctor
. T
he
man
ufac
ture
r,fa
bric
ator
, an
d er
ecto
r of
pip
ing
are
resp
onsi
ble
for
prov
idin
gm
ater
ials
, co
mpo
nent
s an
d w
orkm
ansh
ip i
n co
mpl
ianc
e w
ithth
e re
quire
men
ts o
f thi
s C
ode
and
of th
e en
gine
erin
g de
sign
.
(con
tinue
d)
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26
Tab
le D
.1 (
conc
lude
d)
Not
es /
Com
men
tsP
ED
Com
plia
nce
PE
DA
nnex
IP
relim
inar
y ob
serv
atio
nsA
NS
I/AS
ME
B31
.3R
efer
ence
AN
SI/A
SM
E B
31.3
is r
efer
red
to b
elow
as
“the
Cod
e”IS
O 1
5649
clau
seG
uide
clau
se
3T
he m
anuf
actu
rer
is u
nder
an
oblig
atio
n to
ana
lyse
the
haza
rds
inor
der
to id
entif
y th
ose
whi
ch a
pply
to h
is e
quip
men
t on
acco
unt o
fpr
essu
re; h
e m
ust t
hen
desi
gn a
nd c
onst
ruct
it ta
king
acc
ount
of h
isan
alys
is.
Res
pons
ibili
ties
are
set b
y th
e D
irect
ive
(a le
gal i
nstr
umen
t)an
d pl
aces
full
resp
onsi
bilit
y up
on th
e m
anuf
actu
rer.
4.2
4T
he e
ssen
tial r
equi
rem
ents
are
to b
e in
terp
rete
d an
d ap
plie
d in
suc
ha
way
as
to ta
ke a
ccou
nt o
f the
sta
te o
f the
art
and
cur
rent
pra
ctic
eat
the
time
of d
esig
n an
d m
anuf
actu
re a
s w
ell a
s of
tech
nica
l and
econ
omic
con
side
ratio
ns w
hich
are
con
sist
ent w
ith a
hig
h de
gree
of
heal
th a
nd s
afet
y pr
otec
tion.
300(
c)In
tent
of t
he C
ode.
4.1
Fift
h re
cita
l of t
he D
irect
ive
(Pag
e N
o. L
181/
1):
5W
here
as th
is D
irect
ive
rela
tes
also
to a
ssem
blie
s co
mpo
sed
of s
ever
al p
iece
s of
pre
ssur
e eq
uipm
ent a
ssem
bled
to c
onst
itute
an
inte
grat
ed a
nd fu
nctio
nal w
hole
; whe
reas
thes
eas
sem
blie
s m
ay r
ange
from
sim
ple
asse
mbl
ies
such
as
pres
sure
coo
kers
to c
ompl
ex a
ssem
blie
s su
ch a
s w
ater
tube
boi
lers
; whe
reas
, if t
he m
anuf
actu
rer
of a
n as
sem
bly
inte
nds
it to
be
plac
ed o
n th
e m
arke
t and
put
into
ser
vice
as
an a
ssem
bly
– an
d no
t in
the
form
of i
ts c
onst
ituen
t non
-ass
embl
ed e
lem
ents
– th
at a
ssem
bly
mus
t con
form
to th
is D
irect
ive;
whe
reas
, on
the
othe
r ha
nd, t
his
Dire
ctiv
e do
es n
ot c
over
the
asse
mbl
y of
pre
ssur
e eq
uipm
ent o
n th
e si
te a
nd u
nder
the
resp
onsi
bilit
y of
the
user
, as
in th
e ca
se o
f ind
ustr
ial i
nsta
llatio
ns;
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Tab
le D
.2 –
ES
Rs:
Gen
eral
, and
rel
evan
t to
desi
gn
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
1G
ener
al
1.1
Pre
ssur
e eq
uipm
ent m
ust b
e de
sign
ed, m
anuf
actu
red
and
chec
ked,
and
if ap
plic
able
equ
ippe
d an
d in
stal
led,
in s
uch
a w
ay a
s to
ens
ure
its s
afet
y w
hen
put i
nto
serv
ice
in a
ccor
danc
e w
ith th
e m
anuf
actu
rer's
inst
ruct
ions
, or
in r
easo
nabl
y fo
rese
eabl
e co
nditi
ons.
In th
e C
ode
thes
e ar
e th
e ow
ner’s
res
pons
ibili
ty.
4.2
1.2
In c
hoos
ing
the
mos
t app
ropr
iate
sol
utio
ns, t
he m
anuf
actu
rer
mus
tap
ply
the
prin
cipl
es s
et o
ut b
elow
in th
e fo
llow
ing
orde
r:In
the
Cod
e th
ese
are
the
owne
r’s r
espo
nsib
ility
.4.
2
—el
imin
ate
or r
educ
e ha
zard
s as
far
as is
rea
sona
bly
prac
ticab
le,
—ap
ply
appr
opria
te p
rote
ctio
n m
easu
res
agai
nst h
azar
ds w
hich
cann
ot b
e el
imin
ated
,
—w
here
app
ropr
iate
, inf
orm
use
rs o
f res
idua
l haz
ards
and
indi
cate
whe
ther
it is
nec
essa
ry to
take
app
ropr
iate
spe
cial
mea
sure
s to
redu
ce th
e ris
ks a
t the
tim
e of
inst
alla
tion
and/
or u
se.
1.3
Whe
re th
e po
tent
ial f
or m
isus
e is
kno
wn
or c
an b
e cl
early
fore
seen
,th
e pr
essu
re e
quip
men
t mus
t be
desi
gned
to p
reve
nt d
ange
r fr
omsu
ch m
isus
e or
, if t
hat i
s no
t pos
sibl
e, a
dequ
ate
war
ning
giv
en th
atth
e pr
essu
re e
quip
men
t mus
t not
be
used
in th
at w
ay.
The
Cod
e do
es n
ot c
over
ade
quat
e w
arni
ng r
e m
isus
e.4.
47.
3.2
2D
esig
n
2.1
Gen
eral
The
pre
ssur
e eq
uipm
ent m
ust b
e pr
oper
ly d
esig
ned
taki
ng a
llre
leva
nt fa
ctor
s in
to a
ccou
nt in
ord
er to
ens
ure
that
the
equi
pmen
t will
be s
afe
thro
ugho
ut it
s in
tend
ed li
fe.
301
App
endi
x F
Des
ign
Con
ditio
ns: d
efin
es th
e te
mpe
ratu
res,
pres
sure
s an
d fo
rces
app
licab
le to
the
desi
gn o
f pip
ing
and
stat
es th
e co
nsid
erat
ions
that
sha
ll be
giv
en to
vario
us e
ffect
s an
d th
eir
cons
eque
nt lo
adin
gs.
4.1
The
des
ign
mus
t inc
orpo
rate
app
ropr
iate
saf
ety
coef
ficie
nts
usin
gco
mpr
ehen
sive
met
hods
whi
ch a
re k
now
n to
inco
rpor
ate
adeq
uate
safe
ty m
argi
ns a
gain
st a
ll re
leva
nt fa
ilure
mod
es in
a c
onsi
sten
tm
anne
r.
302.
3A
llow
able
Str
esse
s an
d O
ther
Str
ess
Lim
its.
302.
3.3
Cas
ting
Qua
lity
Fac
tor,
302
.3.4
Wel
d Jo
int
Qua
lity
Fac
tor.
(con
tinue
d)
Lice
nsed
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Tab
le D
.2 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
2D
esig
n (c
ontin
ued)
2.2
Des
ign
for
adeq
uate
str
engt
h
2.2.
1T
he p
ress
ure
equi
pmen
t mus
t be
desi
gned
for
load
ings
app
ropr
iate
to it
s in
tend
ed u
se a
nd o
ther
rea
sona
bly
fore
seea
ble
oper
atin
gco
nditi
ons.
In p
artic
ular
, the
follo
win
g fa
ctor
s m
ust b
e ta
ken
into
acco
unt:
301
Des
ign
Con
ditio
ns.
4.6
—in
tern
al/e
xter
nal p
ress
ure;
301.
2D
esig
n P
ress
ure.
—am
bien
t and
ope
ratio
nal t
empe
ratu
res;
301.
3D
esig
n T
empe
ratu
re.
—st
atic
pre
ssur
e an
d m
ass
of c
onte
nts
in o
pera
ting
and
test
cond
ition
s;30
1.6
Wei
ght E
ffect
s.
—tr
affic
, win
d, e
arth
quak
e lo
adin
g;30
1.5
301.
3.6
321.
1
Cod
e do
es n
ot m
entio
n ‘tr
affic
’, bu
t doe
s in
clud
eIm
pact
, Win
d, E
arth
quak
e, V
ibra
tion,
Dis
char
geR
eact
ions
.
—re
actio
n fo
rces
and
mom
ents
whi
ch r
esul
t fro
m th
e su
ppor
ts,
atta
chm
ents
, pip
ing
etc.
;31
9.5
Rea
ctio
ns.
—co
rros
ion
and
eros
ion,
fatig
ue e
tc.;
302.
4
301.
10
Allo
wan
ces,
Cyc
lic E
ffect
s.
—de
com
posi
tion
of u
nsta
ble
fluid
s.F
323
Exc
lude
d fr
om C
ode:
300
(c)(
6). A
ppen
dix
FP
reca
utio
nary
con
side
ratio
ns (
Gui
danc
e).
Var
ious
load
ings
whi
ch c
an o
ccur
at t
he s
ame
time
mus
t be
cons
ider
ed, t
akin
g in
to a
ccou
nt th
e pr
obab
ility
of t
heir
sim
ulta
neou
soc
curr
ence
.
301.
2.1
(con
tinue
d)
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Tab
le D
.2 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
2D
esig
n (c
ontin
ued)
2.2.
2D
esig
n fo
r ad
equa
te s
tren
gth
mus
t be
base
d on
:
-as
a g
ener
al r
ule,
a c
alcu
latio
n m
etho
d, a
s de
scrib
ed in
2.2
.3,
and
supp
lem
ente
d if
nece
ssar
y by
an
expe
rimen
tal d
esig
nm
etho
d as
des
crib
ed in
2.2
.4, o
r
302,
303
, 304
302
Des
ign
Crit
eria
: sta
tes
pres
sure
-tem
pera
ture
ratin
gs, s
tres
s cr
iteria
, des
ign
allo
wan
ces
and
min
imum
des
ign
valu
es to
geth
er w
ith p
erm
issi
ble
varia
tions
of t
hese
fact
ors
as a
pplie
d to
the
desi
gn o
fpi
ping
.
4.6
-an
exp
erim
enta
l des
ign
met
hod
with
out c
alcu
latio
n, a
s de
scrib
edin
2.2
.4, w
hen
the
prod
uct o
f the
max
imum
allo
wab
le p
ress
ure
PS
and
the
volu
me
V is
less
than
6 00
0 ba
r·L
or th
e pr
oduc
t PS
·DN
less
than
3 0
00 b
ar.
304
is in
tend
ed f
or p
ress
ure
desi
gn o
f co
mpo
nent
s no
tco
vere
d in
Tab
le 3
26.1
but
may
be
used
for
a s
peci
alor
mor
e rig
orou
s de
sign
of
such
com
pone
nts.
Des
igns
shal
l be
che
cked
for
ade
quac
y of
mec
hani
cal s
tren
gth
unde
r ap
plic
able
load
ings
enu
mer
ated
in 3
01.
303,
Pre
ssur
e de
sign
of p
ipin
g co
mpo
nent
s.
304,
Pre
ssur
e de
sign
of c
ompo
nent
s.
2.2.
3C
alcu
latio
n m
etho
d
2.2.
3(a)
Pre
ssur
e co
ntai
nmen
t and
oth
er lo
adin
g as
pect
s
The
allo
wab
le s
tres
ses
for
pres
sure
equ
ipm
ent m
ust b
e lim
ited
havi
ng r
egar
d to
rea
sona
bly
fore
seea
ble
failu
re m
odes
und
erop
erat
ing
cond
ition
s. T
o th
is e
nd, s
afet
y fa
ctor
s m
ust b
e ap
plie
d to
elim
inat
e fu
lly a
ny u
ncer
tain
ty a
risin
g ou
t of m
anuf
actu
re, a
ctua
lop
erat
iona
l con
ditio
ns, s
tres
ses,
cal
cula
tion
mod
els
and
the
prop
ertie
s an
d be
havi
our
of th
e m
ater
ial.
302.
3A
llow
able
Str
esse
s an
d O
ther
Str
ess
Lim
its.
302.
3.3
Cas
ting
Qua
lity
Fac
tor,
302
.3.4
Wel
d Jo
int
Qua
lity
Fac
tor.
6.1,
6.2
The
se c
alcu
latio
n m
etho
ds m
ust p
rovi
de s
uffic
ient
saf
ety
mar
gins
cons
iste
nt, w
here
app
licab
le, w
ith th
e re
quire
men
ts o
f sec
tion
7.
The
req
uire
men
ts s
et o
ut a
bove
may
be
met
by
appl
ying
one
of t
hefo
llow
ing
met
hods
, as
appr
opria
te, i
f nec
essa
ry a
s a
supp
lem
ent t
oor
in c
ombi
natio
n w
ith a
noth
er m
etho
d:
4.1
—de
sign
by
form
ula;
304
Pre
ssur
e D
esig
n of
Com
pone
nts.
—de
sign
by
anal
ysis
;30
4.7
Pre
ssur
e D
esig
n of
Oth
er C
ompo
nent
s. E
xper
imen
tal
stre
ss a
naly
sis,
det
aile
d st
ress
ana
lysi
s.
—de
sign
by
frac
ture
mec
hani
cs;
—C
ode
does
not
men
tion
or e
xclu
de fr
actu
re m
echa
nics
.
(con
tinue
d)
Lice
nsed
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vers
ity o
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rey
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opy,
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Tab
le D
.2 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
2D
esig
n (c
ontin
ued)
2.2.
3(b)
Res
ista
nce
4.1
App
ropr
iate
des
ign
calc
ulat
ions
mus
t be
used
to e
stab
lish
the
resi
stan
ce o
f the
pre
ssur
e eq
uipm
ent c
once
rned
. In
part
icul
ar:
—th
e ca
lcul
atio
n pr
essu
res
mus
t not
be
less
than
the
max
imum
allo
wab
le p
ress
ures
and
take
into
acc
ount
sta
tic h
ead
and
dyna
mic
flui
d pr
essu
res
and
the
deco
mpo
sitio
n of
uns
tabl
e flu
ids.
Whe
re a
ves
sel i
s se
para
ted
into
indi
vidu
al p
ress
ure-
cont
aini
ngch
ambe
rs, t
he p
artit
ion
wal
l mus
t be
desi
gned
on
the
basi
s of
the
high
est p
ossi
ble
cham
ber
pres
sure
rel
ativ
e to
the
low
est
pres
sure
pos
sibl
e in
the
adjo
inin
g ch
ambe
r;
301.
2
301.
2.1
Cov
ered
.
—th
e ca
lcul
atio
n te
mpe
ratu
res
mus
t allo
w fo
r ap
prop
riate
saf
ety
mar
gins
;30
1.3
Des
ign
Tem
pera
ture
. Cov
ered
.
—th
e de
sign
mus
t tak
e ap
prop
riate
acc
ount
of a
ll po
ssib
leco
mbi
natio
ns o
f tem
pera
ture
and
pre
ssur
e w
hich
mig
ht a
rise
unde
r re
ason
ably
fore
seea
ble
oper
atin
g co
nditi
ons
for
the
equi
pmen
t;
301.
2.1
Des
ign
Pre
ssur
e: G
ener
al. C
over
ed.
—th
e m
axim
um s
tres
ses
and
peak
str
ess
conc
entr
atio
ns m
ust b
eke
pt w
ithin
saf
e lim
its;
304,
319
.4,
321.
1.3
304.
7.2
319.
3.6
302.
3.5
Cov
ered
.
—th
e ca
lcul
atio
n fo
r pr
essu
re c
onta
inm
ent m
ust u
tiliz
e th
e va
lues
appr
opria
te to
the
prop
ertie
s of
the
mat
eria
l, ba
sed
ondo
cum
ente
d da
ta, h
avin
g re
gard
to th
e pr
ovis
ions
set
out
inse
ctio
n 4
toge
ther
with
app
ropr
iate
saf
ety
fact
ors.
Mat
eria
lch
arac
teris
tics
to b
e co
nsid
ered
, whe
re a
pplic
able
, inc
lude
:
—yi
eld
stre
ngth
, 0,2
% o
r 1,
0 %
pro
of s
tren
gth
asap
prop
riate
at c
alcu
latio
n te
mpe
ratu
re;
302.
3.2
Tab
le A
-1
Cov
ered
.
—te
nsile
str
engt
h;30
2.3.
1(a)
Tab
les
A-1
and
A-2
Cov
ered
.
—tim
e-de
pend
ent s
tren
gth,
i.e.
cre
ep s
tren
gth.
302.
3.2
Cov
ered
.
(con
tinue
d)
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opy,
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Tab
le D
.2 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
2D
esig
n (c
ontin
ued)
2.2.
3(b)
(con
tinue
d)—
fatig
ue d
ata;
302.
3.5,
319.
3.6
Fat
igue
da
ta:
Fat
igue
is
ta
ken
into
ac
coun
t in
AN
SI/A
SM
E B
31.3
in tw
o w
ays:
(a)
by r
educ
ing
the
allo
wab
le s
tres
s ra
nge
base
d on
the
num
ber
of c
ycle
s (3
02.3
.5);
and
(b)
by a
pply
ing
stre
ss in
tens
ifica
tion
fact
ors
(319
.3.6
)w
hen
calc
ulat
ing
the
disp
lace
men
t str
ess
rang
e.
K30
4.8,
K31
9,X
302.
1.3
Cha
pter
IX (
K30
4 et
c.)
cove
rs h
igh
pres
sure
pip
ing
&A
ppen
dix
X c
over
s m
etal
lic b
ello
ws
expa
nsio
n jo
ints
.
—Y
oung
's m
odul
us (
mod
ulus
of e
last
icity
);31
9.3.
2,T
able
C-6
Cov
ered
.
—ap
prop
riate
am
ount
of p
last
ic s
trai
n;30
2.3.
5A
NS
I/AS
ME
B31
.3 a
ddre
sses
this
indi
rect
ly b
y lim
iting
the
max
imum
str
ess
for
sust
aine
d an
d di
spla
cem
ent
load
s.
—im
pact
str
engt
h;32
3.3
Impa
ct T
estin
g M
etho
ds a
nd A
ccep
tanc
e C
riter
ia.
Cov
ered
.
—fr
actu
re to
ughn
ess;
301.
9
—ap
prop
riate
join
t fac
tors
mus
t be
appl
ied
to th
e m
ater
ial
prop
ertie
s de
pend
ing,
for
exam
ple,
on
the
type
of n
on-
dest
ruct
ive
test
ing,
the
mat
eria
ls jo
ined
and
the
oper
atin
gco
nditi
ons
envi
sage
d;
302.
3.4,
Tab
le 3
02.3
.4
Wel
d Jo
int Q
ualit
y F
acto
rs.
6.2
—th
e de
sign
mus
t tak
e ap
prop
riate
acc
ount
of a
ll re
ason
ably
fore
seea
ble
degr
adat
ion
mec
hani
sms
(e.g
. cor
rosi
on, c
reep
,fa
tigue
) co
mm
ensu
rate
with
the
inte
nded
use
of t
he e
quip
men
t.A
ttent
ion
mus
t be
draw
n, in
the
inst
ruct
ions
ref
erre
d to
inse
ctio
n 3.
4, to
par
ticul
ar fe
atur
es o
f the
des
ign
whi
ch a
rere
leva
nt to
the
life
of th
e eq
uipm
ent,
for
exam
ple:
302.
3.4,
Tab
le 3
02.3
.4
—fo
r cr
eep:
des
ign
hour
s of
ope
ratio
n at
spe
cifie
dte
mpe
ratu
res;
302.
3.2
AN
SI/A
SM
E B
31.3
bas
ical
ly h
as a
sin
gle
time
depe
nden
t crit
erio
n, th
e 10
0 00
0 ho
urs
desc
ribed
in30
2.3.
2 as
a b
asis
for
allo
wab
le s
tres
ses.
4.1
—fo
r fa
tigue
: des
ign
num
ber
of c
ycle
s at
spe
cifie
d st
ress
leve
ls;
302.
3.5
— f
or c
orro
sion
: des
ign
corr
osio
n al
low
ance
.30
2.4,
304
.1.1
c =
sum
of t
he m
echa
nica
l allo
wan
ces.
Cov
ered
.
(con
tinue
d)
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nsed
Cop
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vers
ity o
f Sur
rey
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13
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opy,
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32
Tab
le D
.2 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
2D
esig
n (c
ontin
ued)
2.2.
3(c)
Sta
bilit
y as
pect
s
Whe
re th
e ca
lcul
ated
thic
knes
s do
es n
ot a
llow
for
adeq
uate
stru
ctur
al s
tabi
lity,
the
nece
ssar
y m
easu
res
mus
t be
take
n to
rem
edy
the
situ
atio
n ta
king
into
acc
ount
the
risks
from
tran
spor
t and
hand
ling.
302.
4.1
Not
spe
cific
ally
add
ress
ed in
AN
SI/A
SM
E B
31.3
.H
owev
er A
NS
I/AS
ME
B31
.3 d
oes
not p
erm
itth
ickn
esse
s le
ss th
an th
at r
equi
red
for
stru
ctur
alst
abili
ty.
4.1
2.2.
4E
xper
imen
tal d
esig
n m
etho
d
The
des
ign
of th
e eq
uipm
ent m
ay b
e va
lidat
ed, i
n al
l or
in p
art,
byan
app
ropr
iate
test
pro
gram
me
carr
ied
out o
n a
sam
ple
repr
esen
tativ
e of
the
equi
pmen
t or
the
cate
gory
of e
quip
men
t.
304.
7.2
Pro
of te
st in
acc
orda
nce
with
eith
er A
NS
I / A
SM
EB
16.9
, MS
S S
P-9
7 or
Sec
tion
VIII
, Div
isio
n I,
UG
-101
.C
over
ed.
4.1
The
test
pro
gram
me
mus
t be
clea
rly d
efin
ed p
rior
to te
stin
g an
dac
cept
ed b
y th
e no
tifie
d bo
dy r
espo
nsib
le fo
r th
e de
sign
con
form
ityas
sess
men
t mod
ule,
whe
re it
exi
sts.
Thi
s pr
ogra
mm
e m
ust d
efin
e te
st c
ondi
tions
and
crit
eria
for
acce
ptan
ce o
r re
fusa
l. T
he a
ctua
l val
ues
of th
e es
sent
ial
dim
ensi
ons
and
char
acte
ristic
s of
the
mat
eria
ls w
hich
con
stitu
te th
eeq
uipm
ent t
este
d sh
all b
e m
easu
red
befo
re th
e te
st.
Whe
re a
ppro
pria
te, d
urin
g te
sts,
it m
ust b
e po
ssib
le to
obs
erve
the
criti
cal z
ones
of t
he p
ress
ure
equi
pmen
t with
ade
quat
ein
stru
men
tatio
n ca
pabl
e of
reg
iste
ring
stra
ins
and
stre
sses
with
suffi
cien
t pre
cisi
on.
The
test
pro
gram
me
mus
t inc
lude
:
(a)
A p
ress
ure
stre
ngth
test
, the
pur
pose
of w
hich
is to
che
ckth
at, a
t a p
ress
ure
with
a d
efin
ed s
afet
y m
argi
n in
rel
atio
n to
the
max
imum
allo
wab
le p
ress
ure,
the
equi
pmen
t doe
s no
tex
hibi
t sig
nific
ant l
eaks
or
defo
rmat
ion
exce
edin
g a
dete
rmin
ed th
resh
old.
304.
7.2(
a,b,
c,d)
Cov
ered
.
The
test
pre
ssur
e m
ust b
e de
term
ined
on
the
basi
s of
the
diffe
renc
es b
etw
een
the
valu
es o
f the
geo
met
rical
and
mat
eria
lch
arac
teris
tics
mea
sure
s un
der
test
con
ditio
ns a
nd th
e va
lues
use
dfo
r de
sign
pur
pose
s; it
mus
t tak
e in
to a
ccou
nt th
e di
ffere
nces
betw
een
the
test
and
des
ign
tem
pera
ture
s;
(con
tinue
d)
Lice
nsed
Cop
y: n
a na
, Uni
vers
ity o
f Sur
rey
- J
ISC
, Wed
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13
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opy,
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)
33
Tab
le D
.2 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
2D
esig
n (c
ontin
ued)
2.2.
4E
xper
imen
tal d
esig
n m
etho
d (c
ontin
ued)
(b)
whe
re th
e ris
k of
cre
ep o
r fa
tigue
exi
sts,
app
ropr
iate
test
sde
term
ined
on
the
basi
s of
the
serv
ice
cond
ition
s la
id d
own
for
the
equi
pmen
t, fo
r in
stan
ce h
old
time
at s
peci
fied
tem
pera
ture
s, n
umbe
r of
cyc
les
at s
peci
fied
stre
ss-le
vels
, etc
.;
K30
4.8
K30
4.8.
5
X30
2.1.
3
Fat
igue
Ana
lysi
s.
Fat
igue
Eva
luat
ion
by T
est.
Fat
igue
Ana
lysi
s: M
etal
lic B
ello
ws
Exp
ansi
on J
oint
s.
(c)
whe
re n
eces
sary
, add
ition
al te
sts
conc
erni
ng o
ther
fact
ors
refe
rred
to in
2.2
.1 s
uch
as c
orro
sion
, ext
erna
l dam
age,
etc
.F
323
Sel
ectio
n of
Mat
eria
l to
Res
ist D
eter
iora
tion
in S
ervi
ceis
not
with
in th
e sc
ope
of th
e C
ode.
(G
uida
nce)
.
2.3
Pro
visi
ons
to e
nsur
e sa
fe h
andl
ing
and
oper
atio
n
The
met
hod
of o
pera
tion
spec
ified
for
pres
sure
equ
ipm
ent m
ust b
esu
ch a
s to
pre
clud
e an
y re
ason
ably
fore
seea
ble
risk
in o
pera
tion
ofth
e eq
uipm
ent.
Par
ticul
ar a
ttent
ion
mus
t be
paid
, whe
re a
ppro
pria
te,
to:
App
endi
x G
Saf
egua
rdin
g. C
over
ed.
4.1
—cl
osur
es a
nd o
peni
ngs;
—da
nger
ous
disc
harg
e of
pre
ssur
e re
lief b
low
-off;
G30
0.2(
d)
—de
vice
s to
pre
vent
phy
sica
l acc
ess
whi
lst p
ress
ure
or a
vac
uum
exis
ts;
—su
rfac
e te
mpe
ratu
re ta
king
into
con
side
ratio
n th
e in
tend
ed u
se;
—de
com
posi
tion
of u
nsta
ble
fluid
s.F
323
Cov
ered
.
In p
artic
ular
, pre
ssur
e eq
uipm
ent f
itted
with
an
acce
ss d
oor
mus
t be
equi
pped
with
an
auto
mat
ic o
r m
anua
l dev
ice
enab
ling
the
user
easi
ly to
asc
erta
in th
at th
e op
enin
g w
ill n
ot p
rese
nt a
ny h
azar
d.
Fur
ther
mor
e, w
here
the
open
ing
can
be o
pera
ted
quic
kly,
the
pres
sure
equ
ipm
ent m
ust b
e fit
ted
with
a d
evic
e to
pre
vent
it b
eing
open
ed w
hene
ver
the
pres
sure
or
tem
pera
ture
of t
he fl
uid
pres
ents
a ha
zard
.
(con
tinue
d)
Lice
nsed
Cop
y: n
a na
, Uni
vers
ity o
f Sur
rey
- J
ISC
, Wed
Apr
13
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olle
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opy,
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34
Tab
le D
.2 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
2D
esig
n (c
ontin
ued)
2.4
Mea
ns o
f exa
min
atio
n30
0 (c
)30
0(c)
Inte
nt o
f the
Cod
e4.
1
2.4(
a)P
ress
ure
equi
pmen
t mus
t be
desi
gned
and
con
stru
cted
so
that
all
nece
ssar
y ex
amin
atio
ns to
ens
ure
safe
ty c
an b
e ca
rrie
d ou
t;(2
)T
his
Cod
e is
not
inte
nded
to a
pply
to th
eop
erat
ion,
exa
min
atio
n, in
spec
tion,
test
ing,
mai
nten
ance
, or
repa
ir of
pip
ing
that
has
bee
npl
aced
in s
ervi
ce. T
he p
rovi
sion
s of
this
Cod
em
ay o
ptio
nally
be
appl
ied
for
thos
e pu
rpos
esal
thou
gh o
ther
con
side
ratio
ns m
ay a
lso
bene
cess
ary.
2.4(
b)M
eans
of d
eter
min
ing
the
inte
rnal
con
ditio
n of
the
equi
pmen
t mus
tbe
ava
ilabl
e, w
here
it is
nec
essa
ry to
ens
ure
the
cont
inue
d sa
fety
of
the
equi
pmen
t, su
ch a
s ac
cess
ope
ning
s al
low
ing
phys
ical
acc
ess
to th
e in
side
of t
he p
ress
ure
equi
pmen
t so
that
app
ropr
iate
exam
inat
ions
can
be
carr
ied
out s
afel
y an
d er
gono
mic
ally
;
2.4(
c)O
ther
mea
ns o
f ens
urin
g th
e sa
fe c
ondi
tion
of th
e pr
essu
reeq
uipm
ent m
ay b
e ap
plie
d:
—w
here
it is
too
smal
l for
phy
sica
l int
erna
l acc
ess,
or
—w
here
ope
ning
the
pres
sure
equ
ipm
ent w
ould
adv
erse
ly a
ffect
the
insi
de, o
r
—w
here
the
subs
tanc
e co
ntai
ned
has
been
sho
wn
not t
o be
harm
ful t
o th
e m
ater
ial f
rom
whi
ch th
e pr
essu
re e
quip
men
t is
mad
e an
d no
oth
er in
tern
al d
egra
datio
n m
echa
nism
s ar
ere
ason
ably
fore
seea
ble.
Exa
min
atio
n te
chni
ques
suc
h as
ultr
ason
ic o
rra
diog
raph
ic e
xam
inat
ion
and
acou
stic
em
issi
onte
stin
g ca
n be
use
d to
ens
ure
the
safe
con
ditio
n of
pipi
ng.
2.5
Mea
ns o
f dra
inin
g an
d ve
ntin
gT
he C
ode
does
not
ade
quat
ely
cove
r dr
aini
ng a
ndve
ntin
g.4.
5
Ade
quat
e m
eans
mus
t be
prov
ided
for
the
drai
ning
and
ven
ting
ofpr
essu
re e
quip
men
t whe
re n
eces
sary
:
—to
avo
id h
arm
ful e
ffect
s su
ch a
s w
ater
ham
mer
, vac
uum
colla
pse,
cor
rosi
on a
nd u
ncon
trol
led
chem
ical
rea
ctio
ns. A
llst
ages
of o
pera
tion
and
test
ing,
par
ticul
arly
pre
ssur
e te
stin
g,m
ust b
e co
nsid
ered
,
—to
per
mit
clea
ning
, ins
pect
ion
and
mai
nten
ance
in a
saf
em
anne
r.(c
ontin
ued)
Lice
nsed
Cop
y: n
a na
, Uni
vers
ity o
f Sur
rey
- J
ISC
, Wed
Apr
13
18:4
8:46
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olle
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opy,
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)
35
Tab
le D
.2 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
2D
esig
n (c
ontin
ued)
2.6
Cor
rosi
on o
r ot
her
chem
ical
atta
ckW
here
nec
essa
ry, a
dequ
ate
allo
wan
ce o
r pr
otec
tion
agai
nst
corr
osio
n or
oth
er c
hem
ical
atta
ck m
ust b
e pr
ovid
ed, t
akin
g du
eac
coun
t of t
he in
tend
ed a
nd r
easo
nabl
y fo
rese
eabl
e us
e.
302.
4, 3
04.1
.130
2.4
Allo
wan
ces.
Cov
ered
.4.
1
2.7
Wea
rW
here
sev
ere
cond
ition
s of
ero
sion
or
abra
sion
may
aris
e, a
dequ
ate
mea
sure
s m
ust b
e ta
ken
to:
Not
ade
quat
ely
cove
red
in th
e C
ode.
4.9
—m
inim
ise
that
effe
ct b
y ap
prop
riate
des
ign,
e.g
. add
ition
alm
ater
ial t
hick
ness
, or
by th
e us
e of
line
rs o
r cl
addi
ng m
ater
ials
;30
2.4,
323
.4.3
,32
3.5
Cla
ddin
g an
d Li
ning
Mat
eria
ls a
nd D
eter
iora
tion
ofM
ater
ials
in S
ervi
ce.
—pe
rmit
repl
acem
ent o
f par
ts w
hich
are
mos
t affe
cted
;—
draw
atte
ntio
n, in
the
inst
ruct
ions
ref
erre
d to
in 3
.4, t
o m
easu
res
nece
ssar
y fo
r co
ntin
ued
safe
use
.2.
8A
ssem
blie
s
Ass
embl
ies
mus
t be
so d
esig
ned
that
:C
hapt
er II
Par
ts 3
, 4, 5
& 6
.4.
1—
the
com
pone
nts
to b
e as
sem
bled
toge
ther
are
sui
tabl
e an
dre
liabl
e fo
r th
eir
duty
,—
all t
he c
ompo
nent
s ar
e pr
oper
ly in
tegr
ated
and
ass
embl
ed in
an
appr
opria
te m
anne
r.33
5A
ssem
bly
and
Ere
ctio
n.
2.9
Pro
visi
ons
for
fillin
g an
d di
scha
rge
Whe
re a
ppro
pria
te, t
he p
ress
ure
equi
pmen
t mus
t be
so d
esig
ned
and
prov
ided
with
acc
esso
ries,
or
prov
isio
n m
ade
for
thei
r fit
ting,
as
to e
nsur
e sa
fe fi
lling
and
dis
char
ge in
par
ticul
ar w
ith r
espe
ct to
haza
rds
such
as:
App
endi
x G
Cov
ered
.4.
1
(a)
on fi
lling
:—
over
fillin
g or
ove
rpre
ssur
izat
ion
havi
ng r
egar
d in
par
ticul
ar to
the
fillin
g ra
tio a
nd to
vap
our
pres
sure
at t
he r
efer
ence
tem
pera
ture
;—
inst
abili
ty o
f the
pre
ssur
e eq
uipm
ent;
(b)
on d
isch
arge
: the
unc
ontr
olle
d re
leas
e of
the
pres
suriz
ed fl
uid;
(c)
on fi
lling
or
disc
harg
e: u
nsaf
e co
nnec
tion
and
disc
onne
ctio
n.(c
ontin
ued)
Lice
nsed
Cop
y: n
a na
, Uni
vers
ity o
f Sur
rey
- J
ISC
, Wed
Apr
13
18:4
8:46
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T 2
005,
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ontr
olle
d C
opy,
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I
CE
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)
36
Tab
le D
.2 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
2D
esig
n (c
ontin
ued)
2.10
Pro
tect
ion
agai
nst e
xcee
ding
the
allo
wab
le li
mits
of p
ress
ure
equi
pmen
t.4.
1
Whe
re, u
nder
rea
sona
bly
fore
seea
ble
cond
ition
s, th
e al
low
able
limits
cou
ld b
e ex
ceed
ed, t
he p
ress
ure
equi
pmen
t mus
t be
fitte
dw
ith, o
r pr
ovis
ion
mad
e fo
r th
e fit
ting
of, s
uita
ble
prot
ectiv
e de
vice
s,un
less
the
equi
pmen
t is
inte
nded
to b
e pr
otec
ted
by o
ther
pro
tect
ive
devi
ces
with
in a
n as
sem
bly.
301.
2.2
322.
6
G30
0
Req
uire
d P
ress
ure
Con
tain
men
t or
Rel
ief.
Cov
ered
.
Pre
ssur
e R
elie
ving
Sys
tem
s.
Saf
egua
rdin
g.
9
The
sui
tabl
e de
vice
or
com
bina
tion
of s
uch
devi
ces
mus
t be
dete
rmin
ed o
n th
e ba
sis
of th
e pa
rtic
ular
cha
ract
eris
tics
of th
eeq
uipm
ent o
r as
sem
bly.
Sui
tabl
e pr
otec
tive
devi
ces
and
com
bina
tions
ther
eof c
ompr
ise:
(a)
safe
ty a
cces
sorie
s as
def
ined
in A
rtic
le 1
, sec
tion
2.1.
3,
(b)
whe
re a
ppro
pria
te, a
dequ
ate
mon
itorin
g de
vice
s su
ch a
sin
dica
tors
and
/or
alar
ms
whi
ch e
nabl
e ad
equa
te a
ctio
n to
be
take
n ei
ther
aut
omat
ical
ly o
r m
anua
lly to
kee
p th
e pr
essu
reeq
uipm
ent w
ithin
the
allo
wab
le li
mits
.
2.11
Saf
ety
acce
ssor
ies
2.11
.1S
afet
y ac
cess
orie
s m
ust:
—be
so
desi
gned
and
con
stru
cted
as
to b
e re
liabl
e an
d su
itabl
efo
r th
eir
inte
nded
dut
y an
d ta
ke in
to a
ccou
nt th
e m
aint
enan
cean
d te
stin
g re
quire
men
ts o
f the
dev
ices
, whe
re a
pplic
able
;
—be
inde
pend
ent o
f oth
er fu
nctio
ns, u
nles
s th
eir
safe
ty fu
nctio
nca
nnot
be
affe
cted
by
such
oth
er fu
nctio
ns,
—co
mpl
y w
ith a
ppro
pria
te d
esig
n pr
inci
ples
in o
rder
to o
btai
nsu
itabl
e an
d re
liabl
e pr
otec
tion.
The
se p
rinci
ples
incl
ude,
inpa
rtic
ular
, fai
l-saf
e m
odes
, red
unda
ncy,
div
ersi
ty a
nd s
elf-
diag
nosi
s.
322.
6.3
Pre
ssur
e R
elie
ving
Dev
ices
. Cod
e m
akes
ref
eren
ce to
BP
V C
ode,
Sec
tion
VIII
, Div
isio
n I,
UG
-125
(c),
UG
-126
thro
ugh
UG
-128
, and
UG
-132
thro
ugh
UG
-136
,ex
clud
ing
UG
-135
(e)
and
UG
-136
(c).
9
(con
tinue
d)
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nsed
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y: n
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vers
ity o
f Sur
rey
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opy,
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37
Tab
le D
.2 (
conc
lude
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
2D
esig
n (c
ontin
ued)
2.11
.2P
ress
ure
limiti
ng d
evic
es
322.
6.3(
b)7.
3 of
the
PE
D: 1
0 %
of t
he m
axim
um a
llow
able
pres
sure
.9
Rel
ief S
et P
ress
ure;
the
Cod
e m
akes
ref
eren
ce to
BP
VC
ode,
Sec
tion
VIII
, Div
isio
n I w
hich
allo
ws
exce
ptio
nsw
hich
exc
eed
10 %
.
The
se d
evic
es m
ust b
e so
des
igne
d th
at th
e pr
essu
re w
ill n
otpe
rman
ently
exc
eed
the
max
imum
allo
wab
le p
ress
ure
PS
; how
ever
a sh
ort d
urat
ion
pres
sure
sur
ge in
kee
ping
with
the
spec
ifica
tions
laid
dow
n in
7.3
is a
llow
able
, whe
re a
ppro
pria
te.
302.
2.4
Allo
wan
ces
for
Pre
ssur
e an
d T
empe
ratu
reV
aria
tions
, per
mits
pre
ssur
e ra
tings
or
the
allo
wab
lest
ress
for
pres
sure
des
ign
at th
e te
mpe
ratu
re o
f the
incr
ease
d co
nditi
on to
be
exce
eded
.
2.11
.3T
empe
ratu
re m
onito
ring
devi
ces
The
se d
evic
es m
ust h
ave
an a
dequ
ate
resp
onse
tim
e on
saf
ety
grou
nds,
con
sist
ent w
ith th
e m
easu
rem
ent f
unct
ion.
G30
0.3(
a)(1
)E
ngin
eerin
g S
afeg
uard
s. C
over
ed.
4.1
2.12
Ext
erna
l fire
Whe
re n
eces
sary
, pre
ssur
e eq
uipm
ent m
ust b
e so
des
igne
d an
d,w
here
app
ropr
iate
, fitt
ed w
ith s
uita
ble
acce
ssor
ies,
or
prov
isio
n m
ade
for
thei
r fit
ting,
to m
eet d
amag
e-lim
itatio
n re
quire
men
ts in
the
even
tof
ext
erna
l fire
, hav
ing
part
icul
ar r
egar
d to
its
inte
nded
use
.
F32
3.1
G30
0
Gen
eral
Con
side
ratio
ns (
Gui
danc
e). C
over
ed.
Saf
egua
rdin
g (G
uida
nce)
. Cov
ered
.4.
1
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nsed
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38
Tab
le D
.3 –
ES
Rs
Rel
evan
t to
man
ufac
turin
g
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
3M
anuf
actu
ring
3.1
Man
ufac
turin
g pr
oced
ures
The
man
ufac
ture
r m
ust e
nsur
e th
e co
mpe
tent
exe
cutio
n of
the
prov
isio
ns s
et o
ut a
t the
des
ign
stag
e by
app
lyin
g th
e ap
prop
riate
tech
niqu
es a
nd r
elev
ant p
roce
dure
s, e
spec
ially
with
a v
iew
to th
eas
pect
s se
t out
bel
ow.
300(
b)(3
)4.
1
3.1.
1P
repa
ratio
n of
the
com
pone
nt p
arts
Pre
para
tion
of th
e co
mpo
nent
par
ts (
e.g.
form
ing
and
cham
ferin
g)m
ust n
ot g
ive
rise
to d
efec
ts o
r cr
acks
or
chan
ges
in th
e m
echa
nica
lch
arac
teris
tics
likel
y to
be
detr
imen
tal t
o th
e sa
fety
of t
he p
ress
ure
equi
pmen
t.
Cha
pter
V
332
Fab
ricat
ion,
Ass
embl
y an
d E
rect
ion.
332.
1 G
ener
al, 3
32.2
Ben
ding
, 332
.3 F
orm
ing.
4.1
3.1.
2P
erm
anen
t joi
ning
Per
man
ent j
oint
s an
d ad
jace
nt z
ones
mus
t be
free
of a
ny s
urfa
ce o
rin
tern
al d
efec
ts d
etrim
enta
l to
the
safe
ty o
f the
equ
ipm
ent.
Cha
pter
V
328
Fab
ricat
ion,
Ass
embl
y an
d E
rect
ion.
4.1
The
pro
pert
ies
of p
erm
anen
t joi
nts
mus
t mee
t the
min
imum
prop
ertie
s sp
ecifi
ed fo
r th
e m
ater
ials
to b
e jo
ined
unl
ess
othe
rre
leva
nt p
rope
rty
valu
es a
re s
peci
fical
ly ta
ken
into
acc
ount
in th
ede
sign
cal
cula
tions
.
Wel
ding
. 328
.1 W
eldi
ng R
espo
nsib
ility
, 328
.2 W
eldi
ngQ
ualif
icat
ions
, 328
.3 W
eldi
ng M
ater
ials
, 328
.4P
repa
ratio
n fo
r W
eldi
ng, 3
28.5
Wel
ding
Req
uire
men
ts,
328.
6 W
eld
Rep
air,
330
Pre
heat
ing.
For
pre
ssur
e eq
uipm
ent,
perm
anen
t joi
ning
of c
ompo
nent
s w
hich
cont
ribut
e to
the
pres
sure
res
ista
nce
of e
quip
men
t and
com
pone
nts
whi
ch a
re d
irect
ly a
ttach
ed to
them
mus
t be
carr
ied
out b
y su
itabl
yqu
alifi
ed p
erso
nnel
acc
ordi
ng to
sui
tabl
e op
erat
ing
proc
edur
es.
(con
tinue
d)
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nsed
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vers
ity o
f Sur
rey
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opy,
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39
Tab
le D
.3 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
33.
1.2
Man
ufac
turin
g (c
ontin
ued)
For
pre
ssur
e eq
uipm
ent i
n ca
tego
ries
II, II
I and
IV, o
pera
ting
proc
edur
es a
nd p
erso
nnel
mus
t be
appr
oved
by
a co
mpe
tent
third
part
y w
hich
, at t
he m
anuf
actu
rer's
dis
cret
ion,
may
be:
The
cat
egor
ies
in th
e C
ode
are
not c
onsi
sten
t with
thos
e in
the
Dire
ctiv
e.7.
1
—a
notif
ied
body
;
—a
third
-par
ty
orga
niza
tion
reco
gniz
ed
by
a M
embe
r S
tate
as
prov
ided
for
in A
rtic
le 1
3.
Cod
e re
quire
d qu
alifi
catio
n re
quire
men
ts a
re n
orm
ally
to A
NS
I / A
SM
E B
PV
Cod
e S
ectio
n IX
.
To
carr
y ou
t the
se a
ppro
vals
the
third
par
ty m
ust p
erfo
rmex
amin
atio
ns a
nd te
sts
as s
et o
ut in
the
appr
opria
te h
arm
oniz
edst
anda
rds
or e
quiv
alen
t exa
min
atio
ns a
nd te
sts
or m
ust h
ave
them
perf
orm
ed.
AN
SI/A
SM
E B
31.3
doe
s no
t req
uire
wel
ding
, bra
zing
or b
ondi
ng q
ualif
icat
ions
to b
e pe
rfor
med
by
a th
irdpa
rty.
7.1
3.1.
3N
on-d
estr
uctiv
e te
sts
For
pre
ssur
e eq
uipm
ent,
non-
dest
ruct
ive
test
s of
per
man
ent j
oint
sm
ust b
e ca
rrie
d ou
t by
suita
ble
qual
ified
per
sonn
el.
342
Exa
min
atio
n P
erso
nnel
The
cat
egor
ies
in th
e C
ode
are
not c
onsi
sten
t with
thos
e in
the
Dire
ctiv
e.
8.1
For
pre
ssur
e eq
uipm
ent i
n ca
tego
ries
III a
nd IV
, the
per
sonn
el m
ust
be a
ppro
ved
by a
third
-par
ty o
rgan
izat
ion
reco
gniz
ed b
y a
Mem
ber
Sta
te p
ursu
ant t
o A
rtic
le 1
3.
AN
SI/A
SM
E B
31.3
doe
s no
t req
uire
that
exa
min
atio
nbe
car
ried
out b
y a
third
par
ty.
3.1.
4H
eat t
reat
men
tW
here
ther
e is
a r
isk
that
the
man
ufac
turin
g pr
oces
s w
ill c
hang
e th
em
ater
ial p
rope
rtie
s to
an
exte
nt w
hich
wou
ld im
pair
the
safe
ty o
f the
pres
sure
equ
ipm
ent,
suita
ble
heat
trea
tmen
t mus
t be
appl
ied
at th
eap
prop
riate
sta
ge o
f man
ufac
ture
.
331
Hea
t Tre
atm
ent.
4.1
3.1.
5T
race
abili
ty
Sui
tabl
e pr
oced
ures
mus
t be
esta
blis
hed
and
mai
ntai
ned
for
iden
tifyi
ng th
e m
ater
ial m
akin
g up
the
com
pone
nts
of th
e eq
uipm
ent
whi
ch c
ontr
ibut
e to
pre
ssur
e re
sist
ance
by
suita
ble
mea
ns fr
omre
ceip
t, th
roug
h pr
oduc
tion,
up
to th
e fin
al te
st o
f the
man
ufac
ture
dpr
essu
re e
quip
men
t.
Mar
king
of
indi
vidu
al c
ompo
nent
s (p
ipe,
fla
nges
, bu
ttw
eldi
ng f
ittin
gs e
tc.)
is
cove
red
in t
he r
elev
ant
AS
ME
spec
ifica
tion
e.g.
B16
.5, B
16.9
etc
.
Tra
nsfe
r of
mar
king
whe
n cu
tting
pla
te/p
ipe
is n
otco
vere
d in
AN
SI/A
SM
E B
31.3
. Alth
ough
the
PE
D c
alls
for
trac
eabi
lity
the
requ
irem
ents
are
not
spe
cific
to th
isle
vel o
f det
ail.
4.3.
37.
2
(con
tinue
d)
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opy,
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40
Tab
le D
.3 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
3.2
Fin
al a
sses
smen
t
Pre
ssur
e eq
uipm
ent m
ust b
e su
bjec
ted
to fi
nal a
sses
smen
t as
desc
ribed
bel
ow.
3.2.
1F
inal
insp
ectio
n
Pre
ssur
e eq
uipm
ent
mus
t un
derg
o a
final
in
spec
tion
to
asse
ssvi
sual
ly
and
by
exam
inat
ion
of
the
acco
mpa
nyin
g do
cum
ents
com
plia
nce
with
the
req
uire
men
ts o
f th
e D
irect
ive.
Tes
t ca
rrie
d ou
tdu
ring
man
ufac
ture
m
ay
be
take
n in
to
acco
unt.
As
far
as
isne
cess
ary
on s
afet
y gr
ound
s, th
e fin
al in
spec
tion
mus
t be
car
ried
out
inte
rnal
ly
and
exte
rnal
ly
on
ever
y pa
rt
of
the
equi
pmen
t, w
here
appr
opria
te i
n th
e co
urse
of
man
ufac
ture
(e.
g. w
here
exa
min
atio
ndu
ring
the
final
insp
ectio
n is
no
long
er p
ossi
ble)
.
Cha
pter
VI
Doc
umen
tatio
n to
ve
rify
com
plia
nce
with
th
ere
quire
men
ts o
f th
e D
irect
ive
are
not
cove
red
by t
heC
ode.
Insp
ectio
n, E
xam
inat
ion
and
Tes
ting.
8.2
3.2.
2P
roof
test
Fin
al a
sses
smen
t of p
ress
ure
equi
pmen
t mus
t inc
lude
a te
st fo
r th
epr
essu
re c
onta
inm
ent a
spec
t, w
hich
will
nor
mal
ly ta
ke th
e fo
rm o
f ahy
dros
tatic
pre
ssur
e te
st a
t a p
ress
ure
at le
ast e
qual
, whe
reap
prop
riate
, to
the
valu
e la
id d
own
in 7
.4.
345
Tes
ting.
345
.4 H
ydro
stat
ic L
eak
(Pre
ssur
e) T
est.
4.1
For
cat
egor
y I s
erie
s-pr
oduc
ed p
ress
ure
equi
pmen
t, th
is te
st m
ay b
epe
rfor
med
on
a st
atis
tical
bas
is.
Whe
re th
e hy
dros
tatic
pre
ssur
e te
st is
har
mfu
l or
impr
actic
al, o
ther
test
s of
a r
ecog
nise
d va
lue
may
be
carr
ied
out.
For
test
s ot
her
than
the
hydr
osta
tic p
ress
ure
test
, add
ition
al m
easu
res,
suc
h as
non
-de
stru
ctiv
e te
sts
or o
ther
met
hods
of e
quiv
alen
t val
idity
, mus
t be
appl
ied
befo
re th
ose
test
s ar
e ca
rrie
d ou
t.
345.
5 P
neum
atic
Lea
k T
est,
345.
9 A
ltern
ativ
e Le
ak(P
ress
ure)
Tes
t.4.
1
3.2.
3In
spec
tion
of s
afet
y de
vice
s
For
ass
embl
ies,
the
final
ass
essm
ent m
ust a
lso
incl
ude
a ch
eck
ofth
e sa
fety
dev
ices
inte
nded
to c
heck
full
com
plia
nce
with
the
requ
irem
ents
ref
erre
d to
in 2
.10.
Out
side
sco
pe o
f Cod
e.8.
2
(con
tinue
d)
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nsed
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41
Tab
le D
.3 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
3.3
Mar
king
and
labe
lling
In a
dditi
on to
the
CE
mar
king
ref
erre
d to
in A
rtic
le 1
5, th
e fo
llow
ing
info
rmat
ion
mus
t be
prov
ided
:O
utsi
de s
cope
of C
ode.
7.3
(a)
for
all p
ress
ure
equi
pmen
t:
—th
e ye
ar o
f man
ufac
ture
;
—id
entif
icat
ion
of
the
pres
sure
eq
uipm
ent
acco
rdin
g to
its
natu
re,
such
as
type
, se
ries
or b
atch
ide
ntifi
catio
n an
d se
rial
num
ber;
—es
sent
ial m
axim
um/m
inim
um a
llow
able
lim
its;
(b)
depe
ndin
g on
the
type
of p
ress
ure
equi
pmen
t, fu
rthe
r in
form
atio
nne
cess
ary
for
safe
inst
alla
tion,
ope
ratio
n or
use
and
, whe
reap
plic
able
, mai
nten
ance
and
per
iodi
c in
spec
tion
such
as:
—th
e vo
lum
e V
of t
he p
ress
ure
equi
pmen
t in
1;
—th
e no
min
al s
ize
for
pipi
ng D
N;
—th
e te
st p
ress
ure
PT
app
lied
in b
ar a
nd d
ate;
—sa
fety
dev
ice
set p
ress
ure
in b
ar;
—ou
tput
of t
he p
ress
ure
equi
pmen
t in
kW;
—su
pply
vol
tage
in V
(vo
lts);
—in
tend
ed u
se;
–fil
ling
ratio
kg/
L;
—m
axim
um fi
lling
mas
s in
kg;
—ta
re m
ass
in k
g;
—th
e pr
oduc
t gro
up.
(c)
whe
re n
eces
sary
, war
ning
s fix
ed to
the
pres
sure
equ
ipm
ent
draw
ing
atte
ntio
n to
mis
use
whi
ch e
xper
ienc
e ha
s sh
own
mig
htoc
cur.
(con
tinue
d)
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nsed
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vers
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42
Tab
le D
.3 (
conc
lude
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l Saf
ety
Req
uire
men
tsA
NS
I/AS
ME
B31
.3R
efer
ence
Not
es /
Com
men
tsIS
O 1
5649
clau
seG
uide
clau
se
3.3
Mar
king
and
labe
lling
(co
ntin
ued)
The
CE
mar
king
and
the
requ
ired
info
rmat
ion
mus
t be
give
n on
the
pres
sure
equ
ipm
ent o
r on
a d
atap
late
firm
ly a
ttach
ed to
it, w
ith th
efo
llow
ing
exce
ptio
ns:
—w
here
app
licab
le, a
ppro
pria
te d
ocum
enta
tion
may
be
used
toav
oid
repe
titiv
e m
arki
ng o
f ind
ivid
ual p
arts
suc
h as
pip
ing
com
pone
nts,
inte
nded
for
the
sam
e as
sem
bly.
Thi
s ap
plie
s to
CE
mar
king
and
oth
er m
arki
ng a
nd la
belli
ng r
efer
red
to in
this
Ann
ex;
—w
here
the
pre
ssur
e eq
uipm
ent
is t
oo s
mal
l, e.
g. a
cces
sorie
s, t
hein
form
atio
n re
ferr
ed t
o in
(b)
may
be
give
n on
a la
bel a
ttach
ed t
oth
at p
ress
ure
equi
pmen
t;
—la
belli
ng o
r ot
her
adeq
uate
mea
ns m
ay b
e us
ed f
or t
he m
ass
tobe
fill
ed a
nd t
he w
arni
ngs
refe
rred
to
in (
c),
prov
ided
it
rem
ains
legi
ble
for
the
appr
opria
te p
erio
d of
tim
e.
3.4
Ope
ratin
g in
stru
ctio
ns
(a)
Whe
n pr
essu
re e
quip
men
t is
plac
ed o
n th
e m
arke
t, it
mus
t be
acco
mpa
nied
, as
far
as r
elev
ant,
with
inst
ruct
ions
for
the
user
,co
ntai
ning
all
the
nece
ssar
y sa
fety
info
rmat
ion
rela
ting
to:
Out
side
sco
pe o
f Cod
e. N
ot r
elev
ant t
o pi
ping
sys
tem
s.N
/AN
/A
—m
ount
ing
incl
udin
g as
sem
blin
g of
diff
eren
t pie
ces
of p
ress
ure
equi
pmen
t;
—pu
tting
into
ser
vice
;
—us
e;
—m
aint
enan
ce in
clud
ing
chec
ks b
y th
e us
er;
(b)
Inst
ruct
ions
mus
t cov
er in
form
atio
n af
fixed
to th
e pr
essu
reeq
uipm
ent i
n ac
cord
ance
with
3.3
, with
the
exce
ptio
n of
ser
ial
iden
tific
atio
n, a
nd m
ust b
e ac
com
pani
ed, w
here
app
ropr
iate
, by
the
tech
nica
l doc
umen
ts, d
raw
ings
and
dia
gram
s ne
cess
ary
for
afu
ll un
ders
tand
ing
of th
ese
inst
ruct
ions
;
(c)
If ap
prop
riate
, the
se in
stru
ctio
ns m
ust a
lso
refe
r to
haz
ards
aris
ing
from
mis
use
in a
ccor
danc
e w
ith 1
.3 a
nd p
artic
ular
feat
ures
of t
he d
esig
n in
acc
orda
nce
with
2.2
.3.
App
endi
x G
Lice
nsed
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43
Tab
le D
.4 —
ES
Rs
Rel
evan
t to
Mat
eria
ls
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
4M
ater
ials
Mat
eria
ls u
sed
for
the
man
ufac
ture
of p
ress
ure
equi
pmen
t mus
t be
suita
ble
for
such
app
licat
ion
durin
g th
e sc
hedu
led
lifet
ime
unle
ssre
plac
emen
t is
fore
seen
.
Wel
ding
con
sum
able
s an
d ot
her
join
ing
mat
eria
ls n
eed
fulfi
l onl
y th
ere
leva
nt r
equi
rem
ents
of 4
.1, 4
.2 (
a) a
nd th
e fir
st p
arag
raph
of 4
.3, i
nan
app
ropr
iate
way
, bot
h in
divi
dual
ly a
nd in
a jo
ined
str
uctu
re.
The
exc
lusi
on o
f sec
tion
4.2(
b) m
eans
that
ther
e is
no
requ
irem
ent t
o ha
ve w
eldi
ng c
onsu
mab
les
inco
mpl
ianc
e w
ith a
har
mon
ised
sta
ndar
d or
sub
ject
to a
Eur
opea
n A
ppro
val f
or M
ater
ials
. Not
rel
evan
t.
N/A
N/A
4.1
Mat
eria
ls fo
r pr
essu
rised
par
ts m
ust:
(a)
have
app
ropr
iate
pro
pert
ies
for
all o
pera
ting
cond
ition
s w
hich
are
reas
onab
ly
fore
seea
ble
and
for
all
test
co
nditi
ons,
an
d in
part
icul
ar t
hey
shou
ld b
e su
ffici
ently
duc
tile
and
toug
h. W
here
appr
opria
te,
the
char
acte
ristic
s of
the
mat
eria
ls m
ust
com
ply
with
the
requ
irem
ents
of
7.5.
Mor
eove
r, d
ue c
are
shou
ld b
e ex
erci
sed
in p
artic
ular
in
sele
ctin
g m
ater
ials
in
orde
r to
pre
vent
brit
tle-t
ype
frac
ture
w
here
ne
cess
ary;
w
here
fo
r sp
ecifi
c re
ason
s br
ittle
mat
eria
l has
to b
e us
ed a
ppro
pria
te m
easu
res
mus
t be
take
n;
Cha
pter
III
Mat
eria
ls
323
Gen
eral
Req
uire
men
ts
323.
1 M
ater
ials
and
Spe
cific
atio
ns, 3
23.2
Tem
pera
ture
Lim
itatio
ns, 3
23.4
Flu
id S
ervi
ce R
equi
rem
ents
, 323
.5D
eter
iora
tion
of M
ater
ials
in S
ervi
ce.
4.1
(b)
be s
uffic
ient
ly c
hem
ical
ly r
esis
tant
to
the
fluid
con
tain
ed i
n th
epr
essu
re
equi
pmen
t; th
e ch
emic
al
and
phys
ical
pr
oper
ties
nece
ssar
y fo
r op
erat
iona
l saf
ety
mus
t not
be
sign
ifica
ntly
affe
cted
with
in th
e sc
hedu
led
lifet
ime
of th
e eq
uipm
ent;
(c)
not b
e si
gnifi
cant
ly a
ffect
ed b
y ag
eing
;
(d)
be s
uita
ble
for
the
inte
nded
pro
cess
ing
proc
edur
es;
(e)
be s
elec
ted
in o
rder
to
avoi
d si
gnifi
cant
und
esira
ble
effe
cts
whe
nth
e va
rious
mat
eria
ls a
re p
ut to
geth
er.
(con
tinue
d)
Lice
nsed
Cop
y: n
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vers
ity o
f Sur
rey
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Apr
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olle
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opy,
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CE
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44
Tab
le D
.4 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
4.2
(a)
The
pre
ssur
e eq
uipm
ent m
anuf
actu
rer
mus
t def
ine
in a
nap
prop
riate
man
ner
the
valu
es n
eces
sary
for
the
desi
gnca
lcul
atio
ns r
efer
red
to in
2.2
.3 a
nd th
e es
sent
ial c
hara
cter
istic
sof
the
mat
eria
ls a
nd th
eir
trea
tmen
t ref
erre
d to
in 4
.1;
(a)
In th
e C
ode
this
is n
ot th
e m
anuf
actu
rer’s
resp
onsi
bilit
y.4.
2
(b)
the
man
ufac
ture
r m
ust p
rovi
de in
his
tech
nica
l doc
umen
tatio
nel
emen
ts r
elat
ing
to c
ompl
ianc
e w
ith th
e m
ater
ials
spe
cific
atio
nsof
the
Dire
ctiv
e in
one
of t
he fo
llow
ing
form
s:
(b)
Mos
t Am
eric
an m
ater
ials
are
not
incl
uded
inE
urop
ean
Har
mon
ised
Sta
ndar
ds. T
hose
not
cove
red
wou
ld r
equi
re E
urop
ean
App
rova
l of
Mat
eria
ls (
see
Art
icle
11,
sec
tion
1 be
low
).A
NS
I/AS
ME
B31
.3 d
oes
not r
equi
re th
atA
mer
ican
mat
eria
ls b
e us
ed: E
N m
ater
ials
are
not
excl
uded
. The
y ar
e ac
cept
able
as
unlis
ted
mat
eria
ls.
5
—by
usi
ng m
ater
ials
whi
ch c
ompl
y w
ith h
arm
oniz
ed s
tand
ards
;
—by
usi
ng m
ater
ials
cov
ered
by
a E
urop
ean
appr
oval
of p
ress
ure
equi
pmen
t mat
eria
ls in
acc
orda
nce
with
Art
icle
11;
PM
A is
cur
rent
ly (
2003
) th
e m
ain
prac
tical
rou
tepe
ndin
g pu
blic
atio
n of
har
mon
ised
sta
ndar
ds w
hich
are
com
patib
le w
ith th
e de
sign
app
roac
h.
—by
a p
artic
ular
mat
eria
l app
rais
al;
(c)
for
pres
sure
eq
uipm
ent
in
cate
gorie
s III
an
d IV
, pa
rtic
ular
appr
aisa
l as
re
ferr
ed
to
in
the
third
in
dent
of
(b
) m
ust
bepe
rfor
med
by
th
e no
tifie
d bo
dy
in
char
ge
of
conf
orm
ityas
sess
men
t pro
cedu
res
for
the
pres
sure
equ
ipm
ent.
(c)
Not
cov
ered
by
Cod
e.5
(con
tinue
d)
Lice
nsed
Cop
y: n
a na
, Uni
vers
ity o
f Sur
rey
- J
ISC
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Apr
13
18:4
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ontr
olle
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opy,
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)
45
Tab
le D
.4 (
conc
lude
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
4.3
The
equ
ipm
ent
man
ufac
ture
r m
ust
take
ap
prop
riate
m
easu
res
toen
sure
th
at
the
mat
eria
l us
ed
conf
orm
s w
ith
the
requ
ired
spec
ifica
tion.
In
part
icul
ar,
docu
men
tatio
n pr
epar
ed b
y th
e m
ater
ial
man
ufac
ture
r af
firm
ing
com
plia
nce
with
a
spec
ifica
tion
mus
t be
obta
ined
for
all m
ater
ials
.
300(
b)(3
),34
1.2(
a),
341.
4.1(
a)(1
),34
1.4.
1(c)
Impl
icit
in 3
00(b
)(3)
.4.
1
For
the
mai
n pr
essu
re-b
earin
g pa
rts
of e
quip
men
t in
cat
egor
ies
II, I
IIan
d IV
, th
is m
ust
take
the
for
m o
f a
cert
ifica
te o
f sp
ecifi
c pr
oduc
tco
ntro
l.
Whe
re a
mat
eria
l man
ufac
ture
r ha
s an
app
ropr
iate
qua
lity-
assu
ranc
esy
stem
, ce
rtifi
ed
by
a co
mpe
tent
bo
dy
esta
blis
hed
with
in
the
Com
mun
ity
and
havi
ng
unde
rgon
e a
spec
ific
asse
ssm
ent
for
mat
eria
ls,
cert
ifica
tes
issu
ed b
y th
e m
anuf
actu
rer
are
pres
umed
to
cert
ify c
onfo
rmity
with
the
rele
vant
req
uire
men
ts o
f thi
s se
ctio
n.
Not
add
ress
ed in
the
Cod
e.
Art
icle
11
Eur
opea
n ap
prov
al fo
r m
ater
ials
1E
urop
ean
appr
oval
for
mat
eria
ls, a
s de
fined
in A
rtic
le 1
, sec
tion
2.9,
sha
ll be
issu
ed a
t the
req
uest
of o
ne o
r m
ore
man
ufac
ture
rs o
f mat
eria
ls o
r eq
uipm
ent,
by o
ne o
f the
not
ified
bod
ies
refe
rred
to in
Art
icle
12
spec
ifica
lly d
esig
nate
d fo
r th
at ta
sk. T
he n
otifi
ed b
ody
shal
l det
erm
ine
and
perf
orm
, or
arra
nge
for
the
perf
orm
ance
of,
the
appr
opria
te in
spec
tions
and
test
s to
cert
ify th
e co
nfor
mity
of t
he ty
pes
of m
ater
ial w
ith th
e co
rres
pond
ing
requ
irem
ents
of t
his
Dire
ctiv
e; in
the
case
of m
ater
ials
rec
ogni
zed
as b
eing
saf
e to
use
bef
ore
29 N
ovem
ber
1999
, the
notif
ied
body
sha
ll ta
ke a
ccou
nt o
f the
exi
stin
g da
ta w
hen
cert
ifyin
g su
ch c
onfo
rmity
.
Lice
nsed
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y: n
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13
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46
Tab
le D
.5 –
ES
Rs:
Spe
cific
pre
ssur
e eq
uipm
ent r
equi
rem
ents
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
In a
dditi
on t
o th
e ap
plic
able
req
uire
men
ts o
f se
ctio
ns 1
to
4, t
hefo
llow
ing
requ
irem
ents
app
ly t
o th
e pr
essu
re e
quip
men
t co
vere
d by
sect
ions
5 a
nd 6
.
5F
ired
or o
ther
wis
e he
ated
pre
ssur
e eq
uipm
ent
with
a r
isk
ofov
erhe
atin
g as
ref
erre
d to
in a
rtic
le 3
(1)
Thi
s pr
essu
re e
quip
men
t inc
lude
s:N
/AN
/A
—st
eam
an
d ho
t-w
ater
ge
nera
tors
as
re
ferr
ed
to
in
Art
icle
3,
sect
ion
1.2,
su
ch
as
fired
st
eam
an
d ho
t-w
ater
bo
ilers
,su
perh
eate
rs
and
rehe
ater
s,
was
te-h
eat
boile
rs,
was
tein
cine
ratio
n bo
ilers
, el
ectr
ode
or
imm
ersi
on-t
ype
elec
tric
ally
heat
ed
boile
rs,
pres
sure
co
oker
s,
toge
ther
w
ith
thei
rac
cess
orie
s an
d w
here
app
licab
le th
eir
syst
ems
for
trea
tmen
t of
feed
wat
er a
nd fo
r fu
el s
uppl
y, a
nd
—pr
oces
s-he
atin
g eq
uipm
ent
for
othe
r th
an s
team
and
hot
wat
erge
nera
tion
falli
ng u
nder
Art
icle
3,
sect
ion
1.1,
suc
h as
hea
ters
for
chem
ical
and
oth
er s
imila
r pr
oces
ses
and
pres
suriz
ed f
ood-
proc
essi
ng e
quip
men
t.
(con
tinue
d)
Lice
nsed
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47
Tab
le D
.5 –
ES
Rs:
spe
cific
pre
ssur
e eq
uipm
ent r
equi
rem
ents
(c
oncl
uded
)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
5F
ired
or o
ther
wis
e he
ated
pre
ssur
e eq
uipm
ent
with
a r
isk
ofov
erhe
atin
g as
ref
erre
d to
in a
rtic
le 3
(1)
(fo
llow
ing)
Thi
s pr
essu
re
equi
pmen
t m
ust
be
calc
ulat
ed,
desi
gned
an
dco
nstr
ucte
d so
as
to a
void
or
min
imiz
e ris
ks o
f a
sign
ifica
nt l
oss
ofco
ntai
nmen
t fr
om
over
heat
ing.
In
pa
rtic
ular
it
mus
t be
en
sure
d,w
here
app
licab
le, t
hat:
Not
rel
evan
t to
pipi
ng.
N/A
N/A
(a)
appr
opria
te
mea
ns
of
prot
ectio
n ar
e pr
ovid
ed
to
rest
rict
oper
atin
g pa
ram
eter
s su
ch a
s he
at i
nput
, he
at t
ake-
off
and,
whe
re a
pplic
able
, flu
id le
vel s
o as
to
avoi
d an
y ris
k of
loca
l and
gene
ral o
verh
eatin
g;
(b)
sam
plin
g po
ints
are
pro
vide
d w
here
req
uire
d to
allo
w e
valu
atio
nof
the
pro
pert
ies
of t
he f
luid
so
as t
o av
oid
risks
rel
ated
to
depo
sits
and
/or
corr
osio
n;
(c)
adeq
uate
pro
visi
ons
are
mad
e to
elim
inat
e ris
ks o
f dam
age
from
depo
sits
;
(d)
mea
ns o
f sa
fe r
emov
al o
f re
sidu
al
heat
af
ter
shut
dow
n ar
epr
ovid
ed;
(e)
step
s ar
e ta
ken
to a
void
a d
ange
rous
acc
umul
atio
n of
ign
itabl
em
ixtu
res
of c
ombu
stib
le s
ubst
ance
s an
d ai
r, o
r fla
me
blow
back
.
Lice
nsed
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y: n
a na
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vers
ity o
f Sur
rey
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ISC
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13
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opy,
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48
Tab
le D
.6 –
ES
Rs:
Req
uire
men
ts fo
r pi
ping
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
6P
ipin
g as
ref
erre
d to
in a
rtic
le 3
, sec
tion
1.3
Des
ign
and
cons
truc
tion
mus
t ens
ure:
(a)
that
the
ris
k of
ove
rstr
essi
ng f
rom
ina
dmis
sibl
e fr
ee m
ovem
ent
or
exce
ssiv
e fo
rces
be
ing
prod
uced
, e.
g.
on
flang
es,
conn
ectio
ns,
bello
ws
or
hose
s,
is
adeq
uate
ly
cont
rolle
d by
mea
ns s
uch
as s
uppo
rt,
cons
trai
nt,
anch
orin
g, a
lignm
ent
and
pre-
tens
ion;
321
Pip
ing
Sup
port
. Cov
ered
.4.
1
(b)
that
whe
re th
ere
is a
pos
sibi
lity
of c
onde
nsat
ion
occu
rrin
g in
side
pipe
s fo
r ga
seou
s flu
ids,
mea
ns a
re p
rovi
ded
for
drai
nage
and
rem
oval
of
depo
sits
fro
m lo
w a
reas
to a
void
dam
age
from
wat
erha
mm
er o
r co
rros
ion;
301.
5.1
Impa
ct. C
over
ed.
(c)
that
due
con
side
ratio
n is
giv
en t
o th
e po
tent
ial
dam
age
from
turb
ulen
ce a
nd f
orm
atio
n of
vor
tices
; th
e re
leva
nt p
arts
of
2.7
are
appl
icab
le;
302.
4A
llow
ance
s. C
over
ed.
(d)
that
due
con
side
ratio
n is
giv
en t
o th
e ris
k of
fat
igue
due
to
vibr
atio
ns in
pip
es;
301.
10C
hapt
er IX
,A
ppen
dix
X
Cha
pter
IX a
nd A
ppen
dix
X c
over
onl
y H
igh
Pre
ssur
eP
ipin
g an
d B
ello
ws
Exp
ansi
on J
oint
s.
(e)
that
, w
here
flu
ids
of
Gro
up
1 ar
e co
ntai
ned
in
the
pipi
ng,
appr
opria
te m
eans
are
pro
vide
d to
iso
late
'ta
ke-o
ff' p
ipes
the
size
of w
hich
rep
rese
nts
a si
gnifi
cant
ris
k;
Not
cov
ered
.4.
46.
3
(f)
that
the
ris
k of
ina
dver
tent
dis
char
ge i
s m
inim
ized
; th
e ta
ke-o
ffpo
ints
mus
t be
clea
rly m
arke
d on
the
per
man
ent s
ide,
indi
catin
gth
e flu
id c
onta
ined
;
Not
cov
ered
.4.
47.
3.2
(g)
that
the
pos
ition
and
rou
te o
f un
derg
roun
d pi
ping
is
at l
east
reco
rded
in
th
e te
chni
cal
docu
men
tatio
n to
fa
cilit
ate
safe
mai
nten
ance
, ins
pect
ion
or r
epai
r.
Not
cov
ered
.7.
3.1
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Tab
le D
.7 –
ES
Rs:
Spe
cific
qua
ntita
tive
requ
irem
ents
for
cert
ain
pres
sure
equ
ipm
ent
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
7S
peci
fic
quan
titat
ive
requ
irem
ents
fo
r ce
rtai
n pr
essu
reeq
uipm
ent
The
fol
low
ing
prov
isio
ns a
pply
as
a ge
nera
l ru
le.
How
ever
, w
here
they
are
not
app
lied,
inc
ludi
ng i
n ca
ses
whe
re m
ater
ials
are
not
spec
ifica
lly r
efer
red
to a
nd n
o ha
rmon
ized
sta
ndar
ds a
re a
pplie
d, t
hem
anuf
actu
rer
mus
t de
mon
stra
te
that
ap
prop
riate
m
easu
res
have
been
take
n to
ach
ieve
an
equi
vale
nt o
vera
ll le
vel o
f saf
ety.
Cha
pter
III
Mat
eria
ls. C
hapt
er II
I sta
tes
limita
tions
and
req
uire
dqu
alifi
catio
ns fo
r m
ater
ials
bas
ed o
n th
eir
inhe
rent
prop
ertie
s. T
heir
use
in p
ipin
g is
als
o su
bjec
t to
requ
irem
ents
and
lim
itatio
ns in
oth
er p
arts
of t
he C
ode.
4.1
Thi
s se
ctio
n is
an
inte
gral
par
t of A
nnex
I. T
he p
rovi
sion
s la
id d
own
inth
is s
ectio
n su
pple
men
t th
e es
sent
ial r
equi
rem
ents
of
sect
ions
1 t
o 6
for
the
pres
sure
equ
ipm
ent t
o w
hich
they
app
ly.
7.1
Allo
wab
le s
tres
ses
7.1.
1S
ymbo
ls
Re/
t, yi
eld
limit,
indi
cate
s th
e va
lue
at th
e ca
lcul
atio
n te
mpe
ratu
re o
f:S
ymbo
ls in
AN
SI/A
SM
E B
31.3
are
not
con
sist
ent w
ithth
e D
irect
ive.
4.1
—th
e up
per
flow
lim
it fo
r a
mat
eria
l pr
esen
ting
uppe
r an
d lo
wer
flow
lim
its,
—th
e 1,
0 %
pro
of s
tren
gth
of a
uste
nitic
ste
el a
nd n
on-a
lloye
dal
umin
ium
,
—th
e 0,
2 %
pro
of s
tren
gth
in o
ther
cas
es.
Rm
/20
indi
cate
s th
e m
inim
um v
alue
of t
he u
ltim
ate
stre
ngth
20
°C.
Rm
/t de
sign
ates
the
ultim
ate
stre
ngth
at t
he c
alcu
latio
n te
mpe
ratu
re.
(con
tinue
d)
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nsed
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vers
ity o
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rey
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13
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opy,
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50
Tab
le D
.7 (
cont
inue
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
7.1.
2T
he p
erm
issi
ble
gene
ral
mem
bran
e st
ress
for
pre
dom
inan
tly s
tatic
load
s an
d fo
r te
mpe
ratu
res
outs
ide
the
rang
e in
w
hich
cre
ep
issi
gnifi
cant
m
ust
not
exce
ed
the
smal
ler
of
the
follo
win
g va
lues
,ac
cord
ing
to th
e m
ater
ial u
sed:
302.
3A
llow
able
Str
esse
s an
d O
ther
Str
ess
Lim
its.
Cov
ers
man
y m
ater
ials
and
fact
ors
but n
ot a
ll th
efa
ctor
s ar
e co
nsis
tent
with
the
Dire
ctiv
e.
6.1
—in
the
cas
e of
fer
ritic
ste
el in
clud
ing
norm
aliz
ed (
norm
aliz
ed r
olle
d)st
eel
and
excl
udin
g fin
e-gr
aine
d st
eel
and
spec
ially
hea
t-tr
eate
dst
eel,
2/3
of R
e/t a
nd 5
/12
of R
m/2
0;
—in
the
case
of a
uste
nitic
ste
el:
—if
its e
long
atio
n af
ter
rupt
ure
exce
eds
30 %
, 2/3
of R
e/t
—or
, al
tern
ativ
ely,
and
if
its e
long
atio
n af
ter
rupt
ure
exce
eds
35 %
, 5/6
of R
e/t a
nd 1
/3 o
f Rm
/t;
—in
the
cas
e of
non
-allo
y or
low
-allo
y ca
st s
teel
, 10
/19
of R
e/t
and
1/3
of R
m/2
0;
—in
the
case
of a
lum
iniu
m, 2
/3 o
f Re/
t;
—in
th
e ca
se
of
alum
iniu
m
allo
ys
excl
udin
g pr
ecip
itatio
nha
rden
ing
allo
ys 2
/3 o
f Re/
t and
5/1
2 of
Rm
/20.
7.2
Join
t coe
ffici
ents
For
wel
ded
join
ts, t
he jo
int
coef
ficie
nt m
ust
not
exce
ed t
he f
ollo
win
gva
lues
:30
2.3.
4, T
able
A-1
BW
eld
Join
t Qua
lity
Fac
tor
Ej.
6.2
—fo
r eq
uipm
ent
subj
ect
to d
estr
uctiv
e an
d no
n-de
stru
ctiv
e te
sts
whi
ch c
onfir
m t
hat
the
who
le s
erie
s of
join
ts s
how
no
sign
ifica
ntde
fect
s: 1
,
—fo
r eq
uipm
ent s
ubje
ct to
ran
dom
non
-des
truc
tive
test
ing:
0,8
5,
—fo
r eq
uipm
ent
not
subj
ect
to n
on-d
estr
uctiv
e te
stin
g ot
her
than
visu
al in
spec
tion:
0,7
.
If ne
cess
ary,
the
type
of s
tres
s an
d th
e m
echa
nica
l and
tec
hnol
ogic
alpr
oper
ties
of th
e jo
int m
ust a
lso
be ta
ken
into
acc
ount
.
The
val
ues
in th
e C
ode
do n
ot c
ompl
y co
mpl
etel
y w
ithth
e D
irect
ive.
How
ever
the
first
par
agra
ph o
f thi
s T
able
stat
es th
at th
e fo
llow
ing
prov
isio
ns a
pply
as
a ge
nera
lru
le. H
owev
er a
n eq
uiva
lent
ove
rall
leve
l of s
afet
ym
ust b
e ac
hiev
ed.
(con
tinue
d)
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nsed
Cop
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vers
ity o
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rey
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13
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opy,
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51
Tab
le D
.7 (
conc
lude
d)
PE
D A
nnex
IP
ED
Com
plia
nce
Sec
tion
Sub
-se
ctio
n
Ess
entia
l saf
ety
requ
irem
ents
AN
SI/A
SM
EB
31.3
Ref
eren
ceN
otes
/ C
omm
ents
ISO
156
49cl
ause
Gui
decl
ause
7.3
Pre
ssur
e lim
iting
dev
ices
, par
ticul
arly
for
pres
sure
ves
sels
The
mom
enta
ry p
ress
ure
surg
e re
ferr
ed t
o in
2.1
1.2
mus
t be
kep
t to
10 %
of t
he m
axim
um a
llow
able
pre
ssur
e.32
2.6.
3(b)
per
mits
gre
ater
than
10
% a
bove
the
max
imum
allo
wab
le p
ress
ure.
9
7.4
Hyd
rost
atic
test
pre
ssur
e
For
pre
ssur
e ve
ssel
s, t
he h
ydro
stat
ic t
est
pres
sure
ref
erre
d to
in
3.2.
2 m
ust b
e no
less
than
:34
5.4
See
CE
C/P
ED
/WP
G G
uide
line
8/2.
4.1
—th
at
corr
espo
ndin
g to
th
e m
axim
um
load
ing
to
whi
ch
the
pres
sure
eq
uipm
ent
may
be
su
bjec
t in
se
rvic
e ta
king
in
toac
coun
t its
m
axim
um
allo
wab
le
pres
sure
an
d its
m
axim
umal
low
able
tem
pera
ture
, mul
tiplie
d by
the
coef
ficie
nt 1
,25,
or
—th
e m
axim
um a
llow
able
pre
ssur
e m
ultip
lied
by t
he c
oeffi
cien
t1,
43, w
hich
ever
is th
e gr
eate
r.
7.5
Mat
eria
l cha
ract
eris
tics
Unl
ess
othe
r va
lues
are
req
uire
d in
acc
orda
nce
with
oth
er c
riter
iath
at m
ust
be t
aken
into
acc
ount
, a
stee
l is
con
side
red
as s
uffic
ient
lydu
ctile
to
satis
fy 4
.1 (
a) i
f, in
a t
ensi
le t
est
carr
ied
out
by a
sta
ndar
dpr
oced
ure,
its
elo
ngat
ion
afte
r ru
ptur
e is
no
less
tha
n 14
% a
nd i
tsbe
ndin
g ru
ptur
e en
ergy
mea
sure
d on
an
ISO
V t
est-
piec
e is
no
less
than
27
J, a
t a
tem
pera
ture
not
gre
ater
tha
n 20
°C
but
not
hig
her
than
the
low
est s
ched
uled
ope
ratin
g te
mpe
ratu
re.
Cha
pter
III
Mat
eria
ls. C
over
s im
pact
test
ing
in g
reat
det
ail b
utdo
es n
ot m
eet t
he 2
7 J
valu
e fo
r al
l car
bon
and
low
allo
y st
eels
. Not
cov
ered
.
5
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CEN/TR 14549:2004 (E)
52
Annex E(informative)
Sources of further information and guidance
E.1 Established guidelines
E.1.1 General
NOTE Abbreviations used in this annex and not defined elsewhere in this Guide are listed in E.3 below.
E.1.2 European Commission (CEC) guidelines
Although they have no formal legal force, these Guidelines, being published by the CEC, are the most authoritativeinterpretations of the PED in the EU.
The Guidelines are ratified by the Working Group Pressure (CEC/PED/WGP), which operates under the auspicesand chairmanship of the CEC and comprises: representatives of all Member State (MS) governments and relevantpan-European bodies, such as the European standards organisation (CEN), manufacturers (via ORGALIME andothers), users (via ECUI, CEFIC, Europia and others) and the Notified Bodies Forum (NBF). Shortly after theformation of WGP, it became obvious that this group was far too large and cumbersome to produce the necessaryguidance in a timely manner; so the CEC created – again under its chairmanship – the much smaller Working Partyon Guidelines (CEC/PED/WPG), comprising, by invitation, single representatives from: seven selected MSs, andindividual experts from CEN, ORGALIME, NBF and Users (ECUI/CEFIC/Europia).
Copies of the List of Questions on PED, which includes all ratified Guidelines, are readily obtainable via the CEC,national government and ORGALIME websites (see E.2.1 below).
E.1.3 Other guidelines
Two additional sets are ORGALIME “fiches”, and French government “CLAP” forms, both of which are often usedas the basis for CEC Guidelines and then withdrawn if the authors are satisfied with the result; consequently thesesets are continually changing. The former are produced by the ORGALIME PED Workgroup (on which users arerepresented) and published in the ORGALIME Guide and website (see E.2.1 and E.2.2, below); the latter areobtainable via the AFNOR website (see E.2.1, below)
E.2 Other sources of information
E.2.1 Websites
Useful addresses are:
AFNOR http://www.afnor.fr
CEC (general, English) http://europa.eu.int/index_en.htm
CEC (PED specific) http://ped.eurodyn.com
CEN (general) http://www.cenorm.be
CEN (Harmonised European StandardsRelated to the New Approach Directives) http://www.newapproach.org/directivelist.asp
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CEN/TR 14549:2004 (E)
53
DIN http://www.din.de/
DTI (UK government) http://www.dti.gov.uk/strd/pressure.htm
EEMUA (including ECUI) http://www.eemua.co.uk
EPERC http://eperc.jre.ul1
Europia (SOEAG, Issue no.2) http://europia.standardsline.net/
Harmonised European StandardsPublished in OJ http://europa.eu.int/comm/enterprise/newapproach/standardizati
on/harmstds/reflist/equippre.html
ORGALIME http://www.orgalime.org
E.2.2 Published Guidance guidance documents
CLAP (French committeefor pressure equipment) guidelines: http://www.afnor.fr/selection1/normedirect/direquippress.htm
DTI (UK government, telephone: 0870-1502-500):
SI 1999 No 2001 The Pressure Equipment Regulations 1999 (UK transposing regulations) 3)
URN 99/1147 Pressure Equipment – Guidance Notes on the UK Regulations, November 1999 3)
URN 99/1051 Pressure Equipment Directive: Guidelines for the Appointment of Conformity AssessmentBodies3)
EEMUA Publication 196: Valve Purchasers’ Guide to the PED: http://www.eemua.co.uk/publications/cat-mec3.htm
Europia PED Guide for the Oil Industry (not yet available at time of publication of the present Guide), to beavailable at: http://europia.standardsline.net/
ORGALIME Guide on the EC Directive on Pressure Equipment, Apr 99:http://www.orgalime.org/longpub.htm#Anchor-GENERAL-25010
E.2.3 Miscellaneous sources
From time to time, meetings (e.g. the UK Pressure Equipment Co-ordination Forum – PECF), conferences,symposia, workshops, and training courses are held. Also, articles and reports may be published in technicaljournals.
E.3 Abbreviations
The following abbreviations used in this annex are not defined elsewhere in the main text of this Guide:
AFNOR, Association Française de Normalisation (the French standards organisation);
CEFIC, Conseil Européen des Fédérations de l’Industrie Chimique (European Council of Chemical IndustryFederations);
CLAP, Comité de Liaison des Appareils à Pression (Liaison Committee for Pressure Equipment) (France);
3) Available also from DTI website (see E.2.1, above).
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CEN/TR 14549:2004 (E)
54
DIN, Deutsches Institut für Normung (German Standards Institute);
DTI, (UK) Department of Trade and Industry;
ECUI, European Committee of User Inspectorates;
EPERC, European Pressure Equipment Research Council;
����������� �������������������� ����� ��� ��������� ��������������� ����������������������European trade association for engineering industries);
SI, (UK) Statutory instruments;
SOEAG, Standardisation of Oil Equipment Action Group.
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PD CEN/TR 14549:2004
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