metallic industrial piping - part 5: inspection and...

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EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 13480-5 May 2002 ICS 23.040.01 English version Metallic industrial piping - Part 5: Inspection and testing Tuyauteries industrielles métalliques - Partie 5: Inspection et contrôle Metallische industrielle Rohrleitungen - Teil 5: Prufüng This European Standard was approved by CEN on 23 May 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2002 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13480-5:2002 E Licensed Copy: sheffieldun sheffieldun, na, Thu Sep 21 06:58:47 BST 2006, Uncontrolled Copy, (c) BSI

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Page 1: Metallic industrial piping - Part 5: Inspection and testingcngspw.com/Doc/WebNote/200810/Y2008M10D22H14m33s43/... · Metallic industrial piping - Part 5: Inspection and testing

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 13480-5

May 2002

ICS 23.040.01

English version

Metallic industrial piping - Part 5: Inspection and testing

Tuyauteries industrielles métalliques - Partie 5: Inspectionet contrôle

Metallische industrielle Rohrleitungen - Teil 5: Prufüng

This European Standard was approved by CEN on 23 May 2002.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.

CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATIONC O M I T É E U R O P É E N D E N O R M A LI S A T I O NEUR OP ÄIS C HES KOM ITEE FÜR NOR M UNG

Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2002 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.

Ref. No. EN 13480-5:2002 E

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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Contents

Foreword......................................................................................................................................................................4

1 Scope ..............................................................................................................................................................5

2 Normative references ....................................................................................................................................5

3 Terms and definitions....................................................................................................................................6

4 Symbols and abbreviations ..........................................................................................................................6

5 Determination of inspection and testing requirements .............................................................................65.1 General............................................................................................................................................................65.2 Classification of piping .................................................................................................................................65.3 Testing and inspection procedures .............................................................................................................7

6 Design validation ...........................................................................................................................................76.1 Objective and extent......................................................................................................................................76.2 Documentation...............................................................................................................................................76.2.1 General............................................................................................................................................................76.2.2 Design calculations .......................................................................................................................................76.2.3 Technical schedule........................................................................................................................................86.3 Performance of design review.....................................................................................................................96.3.1 System design review ...................................................................................................................................96.3.2 Review of design calculations......................................................................................................................96.3.3 Incomplete documentation ...........................................................................................................................96.3.4 Additional procedures/qualifications ..........................................................................................................96.4 Alternative proof of safety ............................................................................................................................96.5 Manufacturer’s declaration of design compliance...................................................................................10

7 In-process inspection and testing .............................................................................................................107.1 General..........................................................................................................................................................107.2 Materials and formed pressure retaining parts ........................................................................................107.2.1 General..........................................................................................................................................................107.2.2 Verification of material ................................................................................................................................107.2.3 Verification of formed pressure retaining parts .......................................................................................107.2.4 Non-destructive testing of formed parts ...................................................................................................107.2.5 Destructive testing of formed parts ...........................................................................................................117.3 Welding .........................................................................................................................................................117.3.1 Welding approvals .......................................................................................................................................117.3.2 Inspection of welding set-up ......................................................................................................................127.3.3 Testing and inspection during welding .....................................................................................................127.3.4 Inspection after welding..............................................................................................................................127.4 Heat treatment ..............................................................................................................................................12

8 Non-destructive testing of welds ...............................................................................................................138.1 Application of NDT.......................................................................................................................................138.1.1 General..........................................................................................................................................................138.1.2 Examination of weld quality by sample inspection..................................................................................148.1.3 Imperfections revealed by sample inspection ..........................................................................................148.2 Circumferential butt, branch, fillet and seal welds...................................................................................168.2.1 Amount of examination ...............................................................................................................................168.2.2 Dissimilar metal joints.................................................................................................................................188.3 Longitudinal welds ......................................................................................................................................188.4 NDT Methods................................................................................................................................................188.4.1 General..........................................................................................................................................................188.4.2 Acceptance criteria......................................................................................................................................188.4.3 Personnel qualification ...............................................................................................................................21

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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8.4.4 Selection of NDT method ............................................................................................................................228.5 Reports .........................................................................................................................................................228.6 Weld repairs .................................................................................................................................................22

9 Final assessment and documentation........................................................................................................239.1 General..........................................................................................................................................................239.2 Final inspection............................................................................................................................................239.2.1 General..........................................................................................................................................................239.2.2 Visual inspection before the proof test .....................................................................................................239.2.3 Visual inspection after the proof test ........................................................................................................239.2.4 Review of the manufacturing documents .................................................................................................249.3 Proof test ......................................................................................................................................................249.3.1 General..........................................................................................................................................................249.3.2 Hydrostatic pressure test ...........................................................................................................................249.3.3 Pneumatic pressure test .............................................................................................................................279.3.4 Other tests ....................................................................................................................................................289.3.5 Documentation of the proof test ................................................................................................................289.4 Inspection of safety systems......................................................................................................................289.5 Documentation.............................................................................................................................................289.5.1 Final documentation package ....................................................................................................................289.5.2 Design and manufacturing documentation package ...............................................................................309.5.3 Operating instructions ................................................................................................................................309.5.4 Documentation for the purchaser ..............................................................................................................30

10 Declaration/Certification .............................................................................................................................30

Annex A (informative) Inspection of safety systems ...........................................................................................31

Annex ZA (informative) Clauses of this European Standard addressing essential requirements orother provisions of EU directives. .............................................................................................................32

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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Foreword

This document (EN 13480-5:2002) has been prepared by Technical Committee CEN/TC 267 "Industrial piping andpipelines", the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latestby November 2002.

This document has been prepared under a mandate given to CEN by the European Commission and the EuropeanFree Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.

In this standard the Annex A is informative

This European Standard EN 13480 for metallic industrial piping consists of seven interdependent and not dissociableparts which are:

� Part 1: General.

� Part 2: Materials.

� Part 3: Design.

� Part 4: Fabrication and installation.

� Part 5: Inspection and testing.

� Part 6: Additional requirements for buried piping.

CEN/TR 13480-7, Guidance on the use of conformity assessment procedures

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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1 Scope

This Part of this European Standard specifies the requirements for inspection and testing of industrial piping asdefined in EN 13480-1:2002 to be performed on individual spools or piping systems, including supports, designed inaccordance with EN 13480-3 and prEN 13480-6 (if applicable), and fabricated and installed in accordance withEN 13480-4.

2 Normative references

This Part of this European Standard incorporates by dated or undated reference, provisions from otherpublications. These normative references are cited at the appropriate places in the text and the publications arelisted hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply tothis Part of this European Standard only when incorporated in it by amendment or revision. For undated referencesthe latest edition of the publication referred to applies (including amendments).

EN 287-1, Approval testing of welders – Fusion welding – Part 1: Steels.

EN 288-2, Specification and approval of welding procedures for metallic materials -– Part 2: Welding procedurespecification for arc welding.

EN 473:2000, Non destructive testing - Qualification and certification of NDT personnel – General principles.

EN 571-1, Non destructive testing – Penetrant testing – Part 1: General principles.

EN 970, Non-destructive examination of fusion welds – Visual examination.

EN 1289:1998, Non-destructive examination of welds – Penetrant testing of welds – Acceptance levels.

EN 1290, Non-destructive examination of welds – Magnetic particle examination of welds

EN 1291:1998, Non-destructive examination of welds – Magnetic particle testing of welds – Acceptance levels.

EN 1418, Welding personnel – Approval testing of welding operators for fusion welding and resistance weld settersfor fully mechanized and automatic welding of metallic materials.

EN 1435:1997, Non-destructive examination of welds – Radiographic examination of welded joints.

EN 1712:1997, Non-destructive examination of welds – Ultrasonic examination of welded joints – Acceptancelevels.

EN 1713, Non-destructive examination of welds – Ultrasonic examination – Characterization of indications in welds.

EN 1714:1998, Non destructive examination of welds – Ultrasonic examination of welded joints.

EN 12062:1997, Non destructive examination of welds – General rules for metallic materials.

EN 12517:1998, Non-destructive examination of welds – Radiographic examination of welded joints – Acceptancelevels.

EN 13480-1:2002, Metallic industrial piping – Part 1: General.

EN 13480-2:2002, Metallic industrial piping – Part 2: Materials.

EN 13480-3, Metallic industrial piping – Part 3: Design and calculation.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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EN 13480-4:2002, Metallic industrial piping – Part 4: Fabrication and installation.

prEN 13480-6, Metallic industrial piping – Part 6: Additional requirements for buried piping.

CEN/TR 13480-7, Metallic industrial piping – Part 7: Guidance on the use of conformity assessment procedures.

EN 25817:1992, Arc welded joints in steel – Guidance on quality levels for imperfections (ISO 5817:1992).

EN ISO 6520-1:1998, Welding and allied processes – Classification of geometric imperfections in metallic materials– Part 1: Fusion welding (ISO 6520-1: 1998).

3 Terms and definitions

For the purposes of this Part of this European Standard, the terms and definitions given in EN 13480-1:2002 shallapply.

4 Symbols and abbreviations

For the purposes of this Part of this European Standard, the symbols given in EN 13480-1:2002 apply together withthe following abbreviations:

� LT Leak test;

� NDT Non-destructive testing;

� MT Magnetic particle testing;

� PT Penetrant testing;

� RT Radiographic testing;

� UT Ultrasonic testing;

� VT Visual examination;

� PWHT Post-weld heat treatment.

5 Determination of inspection and testing requirements

5.1 General

The fabricator and/or installer shall be responsible for carrying out the testing, examinations and certification specifiedin this European Standard, for all piping fabricated to EN 13480-4. These requirements are specified in clauses 6 to10. Where required in the technical specification, additional examination and testing shall be performed.

NOTE For guidance on the use of conformity assessment procedures see CEN/TR 13480-7.

5.2 Classification of piping

Industrial piping shall be classified in accordance with EN 13480-1:2002, Table 4.1-1.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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NOTE 1 Piping classes I to III are identical to categories I to III of the Pressure Equipment Directive.

NOTE 2 The requirements for classification of industrial piping that is to be installed in a Member State of the EU and which iscovered by the scope of the Pressure Equipment Directive and the appropriate conformity assessment are given in the PressureEquipment Directive.

5.3 Testing and inspection procedures

Testing and inspection shall be carried out by personnel trained for the method used. European Standards orwritten procedures (if necessary) detailing the method and acceptance criteria shall be available to all testingpersonnel and inspectors. Records shall be kept to demonstrate that all required testing and inspection have beencarried out and that the results are acceptable.

6 Design validation

6.1 Objective and extent

Before fabrication/installation commences, a validation of the piping design and its supports shall be performed.The validation shall be carried out independently from the team that prepared the design, and independent fromfabrication/installation.

The design validation includes the pressure walls to the first joint with other pressurised components. It alsoincludes the interaction with components directly connected to the piping, but does not include validation of thecomponents themselves.

The design validation shall be performed to verify that the piping meets the requirements of this EuropeanStandard with regard to materials, design details and dimensions, and that the requirements of procedures andpersonnel can be met during fabrication.

Where the design of parts has already been validated in accordance with this European Standard, and where anappropriate certificate or assessment report is available, a further design validation shall not be required.

6.2 Documentation

6.2.1 General

Documentation shall be provided to demonstrate compliance with this European Standard and shall includeconstruction drawings, parts lists, design calculations and the technical schedule for fabrication/installation.

6.2.2 Design calculations

6.2.2.1 Where calculations are performed by hand or with the aid of a computer, the following minimum datashall be provided:

� explanation of notations;

� calculation input data, including material details;

� reference number of the standard including the edition and reference number of the formula;

� full traceability of the calculations performed;

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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� results of intermediate formulae;

� calculated minimum thickness or the calculated stress compared with the design stress;

� corrosion, wastage and other allowances where applicable;

� thickness tolerances;

� the selected thickness.

6.2.2.2 Where stress analysis is carried out by numerical methods, e.g. finite element method, boundaryelement method or other design methods, it shall be documented.

Documentation shall include at least the following data:

� explanation of notations;

� details of the computer program;

� assumptions for calculation;

� calculation input data;

� graphs for the geometric model, including boundary and compatibility conditions;

� stresses, displacements and strains, where necessary;

� the stresses in the most critical areas;

� calculation of stress intensities compared with the design stress.

6.2.3 Technical schedule

The technical schedule shall consist of:

� a detailed description of the fabrication/installation plan;

� welding procedure specifications together with the welding procedure approval records;

� NDT procedures;

� heat treatment procedures, where applicable;

� leak testing procedures, where applicable;

� pressure test procedures where necessary;

� any additional procedures specifically requested.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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6.3 Performance of design review

6.3.1 System design review

A review of isometrics and/or construction drawings, including parts lists and technical schedules, shall beperformed with regard to operating conditions of the following items:

� the suitability of the material for the pressurised and un-pressurised parts including the required materialinspection documents;

� the suitability of welding procedure specifications and approvals;

� suitability of weld joint design;

� provision for appropriate in-service testing and inspection ,where necessary;

� structural stability, including supports and fixed points;

� provision and adequacy of safety devices.

The system design review shall be performed against the requirements of this European Standard.

6.3.2 Review of design calculations

The review of design calculations shall be carried out to verify that the dimensions specified meet the requirementsof EN 13480-3. The review shall also ensure that the stresses considered include pressure, temperature and thatall loads that may be applied during operating and testing have been considered.

6.3.3 Incomplete documentation

When all required data is not available at the time of the design validation, fabrication/installation may proceedprovided it shall not go beyond the applicable fabrication/installation stage, until approval is received.

6.3.4 Additional procedures/qualifications

Prior to the performance of the specific task involved, for piping class III the following shall be verified, preferably aspart of the design examination:

� Approval of welders;

� Qualification and certification of NDT personnel;

� Procedures for finishing, e.g. cleaning, painting, insulation etc.

6.4 Alternative proof of safety

If the design proposed by the manufacturer has not been prepared by a method acceptable under the requirementsof EN 13480-3, then the manufacturer shall supply all the necessary information in support of the alternative designapproach. This may consist of mathematical analysis, proof test data, operating experience or any other data themanufacturer considers relevant to support this method of design. The documents submitted shall be reviewed toensure that the design of the piping is as safe as that provided by this European Standard and include theprinciples given in 6.3.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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6.5 Manufacturer’s declaration of design compliance

After validation of the design has shown that the design requirements of this European Standard have beenfulfilled, the piping manufacturer shall prepare a declaration that the design is in compliance with the requirementsof this European Standard.

NOTE A specimen of the manufacturer’s declaration of design compliance is given in CEN/TR 13480-7.

A list of the relevant drawings shall be attached to the declaration.

7 In-process inspection and testing

7.1 General

Examinations and tests specified in EN 13480-5 shall be carried out by personnel trained for the method used.European Standards or written procedures (where necessary) detailing the method and acceptance criteria shall beavailable.

7.2 Materials and formed pressure retaining parts

7.2.1 General

The testing and inspection specified below shall be restricted to parts formed during the fabrication process,especially induction bending. Formed bought out standardized parts and components shall not be a part of thisrequirement.

7.2.2 Verification of material

A verification shall be performed that materials are in accordance with the specified material standard or purchaseorder.

7.2.3 Verification of formed pressure retaining parts

It shall be verified that all formed pressure retaining parts comply with the specified shape and dimensionalrequirements, and have received the specified finish or heat treatment.

7.2.4 Non-destructive testing of formed parts

All formed parts shall be subject to non-destructive testing.

The examination shall include, if appropriate:

� wall thickness measurements;

� dimensional checks (ovality, angle of bend etc.);

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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� hardness tests;

� ultrasonic examination for volumetric (internal) imperfections in longitudinal and transversal direction;

� examination for surface or near surface imperfections (magnetic particle or penetrant examination);

� replicas of the surface structure in the tension zone (in case life monitoring is required for creep rangeapplications),

on each component or batch of identical components (dependent on the material and piping category).

Material, heat treatment conditions, heat treatment lot, degree of deformation shall be considered in the definitionof the batch.

7.2.5 Destructive testing of formed parts

Testing shall be performed to verify the heat treatment of the formed parts, and shall include:

� tensile test;

� hot tensile test (where items are being used in the creep range);

� notch impact test;

� micrographs (e.g. 9 % or 12 % Cr steels);

� other tests specified in EN 13480-2:2002 or in a European Standard for base material.

One set of test per cast, wall thickness range and heat treatment lot shall be performed for piping of pipingcategory II and III. The tests shall be performed on test pieces from the end of the component itself, or from testpieces placed together with the components in the heat treatment furnaces.

7.3 Welding

7.3.1 Welding approvals

The following shall be verified:

� Welding procedure specifications (WPS) in accordance with EN 288-2, established for all welding activitiesincluding tack welds and temporary attachment welds;

� Approval of all WPS to EN 13480-4.;

� Appropriate and current approval of all welders in accordance with EN 287-1 and all welding operators inaccordance with EN 1418.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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7.3.2 Inspection of welding set-up

Prior to carrying out any welding, each weld preparation shall be visually inspected. The inspection shall verifycompliance with the drawing and WPS, by ensuring the following:

� the correct materials are used;

� dimensions are within tolerance, including position, alignment, and orientation of branches, nozzles,attachments and anchors, etc.;

� cleanliness and freedom from imperfections which may give rise to defects in the completed joint;

� nozzles, branches etc., properly fit the curvature of the pipe;

� tack welds that are to be incorporated into the final weld are free from cracks or other defects.

7.3.3 Testing and inspection during welding

The following testing and inspection shall be carried out, where appropriate, at suitable stages during the weldingoperation to verify that the specified WPS is being followed for:

a) correct preheat;

b) correct welding process;

c) correct welding consumables;

d) correct electrical characteristics;

e) correct interpass temperature and cleaning;

f) other requirements of the WPS;

g) all tack welds and temporary attachments are welded in accordance with an approved WPS.

7.3.4 Inspection after welding

The following inspection shall be carried out on completion of welding:

a) examination for compliance with drawings;

b) verification that welds are correctly identified and traceable to the welder/operator;

c) verification that temporary attachments have been properly removed.

7.4 Heat treatment

For post-forming and post-weld heat treatment (PWHT), where applicable, it shall be verified by a review of theheat treatment charts or by a hardness test, that the heat treatment carried out complies with the materialspecification or to the appropriate heat treatment procedure.Li

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EN 13480-5:2002 (E)Issue 1 (2002-05)

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8 Non-destructive testing of welds

8.1 Application of NDT

8.1.1 General

8.1.1.1 The following shall be applicable to all welded joints:

a) Welded joints shall be visually examined in accordance with EN 970 before any other NDT is performed;

b) The area to be examined shall include the weld metal and the heat affected zones;

c) Surface examination stipulated in Table 8.2-1 shall be performed on the outer surface;

d) Where a welded joint is to be subsequently formed or heat treated, the required NDT shall be carried out on theweld in the final condition. If a weld will not be accessible for examination after heat treatment or forming, theparties involved shall agree on a suitable alternative;

e) NDT-method used and acceptance criteria for all NDT shall be in accordance with Table 8.4-1;

f) In case of austenitic base or filler material, the method for surface testing shall be PT.

8.1.1.2 Arc strikes and contact points with fused material shall be ground smooth and subjected to surfaceexamination appropriate to the material used.

8.1.1.3 Surface condition and preparation for non-destructive testing

The following criteria shall be met:

a) RT: surface dressing is required where ripples or weld surface irregularities will interfere with the interpretationof the radiographs;

b) UT: surface dressing is required where the surfaces in contact with the probe prevent the scanning process;

c) MT: where necessary surface dressing is required to remove foreign matter to permit an accurate interpretationof the indications.

d) PT: where necessary surface dressing is required to remove foreign matter to permit an accurate interpretationof the indications.

NOTE Care should be taken to avoid masking of flaws by any surface dressing process.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

14

8.1.2 Examination of weld quality by sample inspection

Where the required extent of non-destructive testing is less than 100 %, the specified NDT techniques shall beemployed at the earliest stage practicable in the fabrication process to ensure that sound welds are achieved. Thetiming shall be agreed between the parties involved. Sample joints to be examined shall be:

� randomly selected;

� representative of a group of welds.

At least one complete sample joint shall be examined over the whole circumference of the joint.

Where the number of sample joints required is small, combinations of thicker sections and smaller diameters orthinner sections and greater diameters shall be given preference.

NOTE A group of welds is a quantity of welds, welded by one welder or welding operator, in accordance with a specificwelding procedure specification.

8.1.3 Imperfections revealed by sample inspection

When sample inspection reveals imperfections in a weld which are not acceptable to this European Standard, thefollowing shall apply:

a) Two additional welds of the same group shall be examined by the same method;

b) If these additional welds are acceptable, the initial weld shall be repaired or replaced and re-examined by theoriginal method;

c) If any one of these additional welds reveal an unacceptable imperfection, all welds in that group shall be fullyexamined and, as necessary, repaired or replaced and re-examined.

The procedure illustrated in Figure 8.1-1 shall be followed.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

15

start

yes

no

yes

no

yes

no

Figure 8.1-1 — Flow diagram of additional testing required when imperfections have been revealed

random testing

weldsacceptable ?

test 2 additional welds

additionalwelds

acceptable ?

test all welds of that group

repair tested welds withunacceptable imperfections and

re-examine

weldsacceptable ? end

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EN 13480-5:2002 (E)Issue 1 (2002-05)

16

8.2 Circumferential butt, branch, fillet and seal welds

8.2.1 Amount of examination

The type of NDT required and its extent shall be determined in accordance with Table 8.2-1, taking into account thepiping category the piping is classified to.

The following additional conditions shall apply:

a) For piping where creep or fatigue is the controlling factor in design, it shall be assigned to piping category IIIfor determining the extent of NDT, irrespective of PS and DN;

b) For piping in material groups 1.1, 1.2, and 8.1, in piping classes I or II, volumetric testing shall be a minimumof 10 % of circumferential butt and branch welds irrespective of PS and DN, if the piping is > DN 25 andcontains very toxic or extremely flammable fluids;

c) Where the specified NDT level is 5 %, this shall apply to the first 100 welds made. Where no unacceptableimperfections are identified in this sample, the level of testing may be reduced to an overall level of 2 %.However, the minimum number of welds examined shall be 5. All other requirements given in 8.1.2 shallapply;

d) For the circumferential welds or where the calculated stresses across the weld (as determined usingEN 13480-3) are below 70 % of the nominal design stress for the design conditions, the amount of testing maybe reduced by 50 % of the values given in Table 8.2-1;

e) Piping for steam and superheated water (water at a pressure greater than 0,5 bar and at a temperature equalto or greater than 110 �C) shall be subject to the following NDT:

� where PS · DN � 5 000, 100 % volumetric testing of butt and branch welds;

� where PS · DN � 3 500, 25 % volumetric testing of butt and branch welds;

together with other testing specified in Table 8.2-1 for the combination of material, piping category andthickness;

NOTE For piping operating at 100 �C or more, at least 10 % of socket welds should be radiographed to confirm that anadequate expansion gap has been achieved.

f) For the selection of the appropriate NDT method for volumetric testing, see Table 8.4-4.

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EN

134

80-5

:200

2(E

)Is

sue

1 (2

002-

05)

17

Tab

le 8

.2-1

— E

xten

t o

f te

stin

g f

or

circ

um

fere

nti

al, b

ran

ch, f

illet

an

d s

eal w

eld

s

All

wel

dsC

ircum

fere

ntia

l wel

ds B

ranc

h w

elds

Soc

ket/f

illet

wel

dsS

eal w

elds

Sur

face

test

ing

Vol

umet

ricte

stin

gS

urfa

ce te

stin

g V

olum

etric

test

ing

Sur

face

test

ing

Sur

face

test

ing

Mat

eria

lgr

oup

aP

ipin

g C

lass

VT %

e nb

mm

MT

/PT

c

%R

T/U

T%

Bra

nch

diam

eter

e n mm

MT

/PT

c

%B

ranc

hdi

amet

ere n

b

mm

RT

/UT

%e n mm

MT

/PT

%e n mm

MT

/PT

%

5 I

5II

Nil

All

Nil

All

Nil

Nil

10

1.1

1.2

8.1

III

100

All

10>

DN

100

> 1

5 10

10

All

10

� 3

0

5 10

I>

30 1

0 10

� 3

0

5 10

II>

30 1

0 10

All e

All

Nil

All e

10A

ll e 5

� 3

0

5 2

5

1.3,

1.4

2.1,

2.2

4.1,

4.2

8.2,

8.3

9.1,

9.2

, 9.3

10.1

, 10.

2III

100

> 30

10

2

5 d

All

10

> D

N 1

00 >

15

10 A

ll 25

All

25

� 3

0 1

0 2

5 I

> 30

25

25

� 3

0 2

5 2

5II

> 30

25

2

5 d

25 25

25 10

� 3

010

0 10

0

3.1,

3.2

, 3.3

5.1

, 5.2

, 5.3

5.4,

6.1

, 6.2

,6.

3, 6

.4, 7

.1,

7.2,

11

III

100

> 30

100

10

0d

All

100

All

100

All

100

All

100

a

Mat

eria

l gro

up, s

ee C

R IS

O 1

5608

.

bF

or th

e se

lect

ion

of th

e ap

prop

riate

ND

T-m

etho

d fo

r vo

lum

etric

test

ing,

see

Tab

le 8

.4.2

.

cF

or fe

rriti

c m

ater

ials

pre

fere

nce

shal

l be

give

n to

MT

.

dA

dditi

onal

test

ing

for

tran

sver

se d

efec

ts fr

om w

eld

surf

ace

(see

8.4

.4.2

).

e

O

nly

if P

WH

T h

as b

een

carr

ied

out.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

18

8.2.2 Dissimilar metal joints

The test methods and extent of testing for joints between ferritic and other materials (e.g. austenitic, nickel-basedalloys) shall be according to the highest material group which is applicable to the base materials.

8.3 Longitudinal welds

Longitudinal welds, except those in components made to material specifications acceptable to this EuropeanStandard, shall be subject to the level of NDT appropriate to the joint coefficient required (see Table 8.3-1).

Table 8.3-1 — Extent of NDT for longitudinal welds

Joint coefficientz

VT

%

MT or PT a

%

RT or UT b

%

z � 0,7 100 0 0

0,7 < z � 0,85 100 10 10

0,85 < z � 1,0 100 100 100

a for ferritic materials preference shall be given to MT.

b see Table 8.4-3

8.4 NDT Methods

8.4.1 General

The NDT methods specified in the following clauses shall be performed in accordance with written NDT procedures,and, where appropriate, with NDT instructions.

8.4.2 Acceptance criteria

The acceptance criteria for the NDT techniques shall follow the European Standards in Table 8.4-1. Requirements foracceptance criteria for surface imperfections are given in Table 8.4-2 and additional requirements for acceptancecriteria for internal imperfections detected by RT are given in Table 8.4-3.

Table 8.4-1 — NDT techniques, method, acceptance criteria

NDT Technique(abbreviation)

Method Acceptance Criteria

Visual Examination (VT) EN 970 Table 8.4-2Radiographic Testing (RT) EN 1435:1997, class B a b EN 12517:1998

Acceptance level 2 and additionalrequirements of Table 8.4-3

Ultrasonic Testing (UT) EN 1714:1998, class B b EN 1712 :1997, c

Acceptance level 2 d

Penetrant Testing (PT) EN 571-1 EN 1289 :1998,Acceptance level 1

Magnetic Particle Testing (MT) EN 1290 EN 1291 :1998,Acceptance level 1

a However, the maximum area for single exposure shall correspond to the requirements of EN 1435:1997, class A.

b Class A for material group 1.1, 1.2, 8.1 when piping class is I or II.

c For the characterization of indications EN 1713 may be used.

d Acceptance level 3 for material group 1.1, 1.2, 8.1 when piping class is I or II.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

19

Table 8.4-2 — Acceptance criteria for surface imperfections

Identification of surface imperfection Maximum permitted imperfection

Piping class in accordance withEN 13480-1:2002, Table 4.1-1

III II I

EN ISO 6520-1:1998,

Referencenumber

Designation EN 25817:1992

Referencenumber

EN 25817:1992, quality level

Additional requirements

a

1001-1064 Cracks (all) 1 Not permitted

2011-20172021-2024

Gas cavity (all)Shrinkage cavity (all)

3 to 5 B1) B C 1) When occurring at the surface,- diameter = 2 mm and- depth = 1 mm

with additional conditions that:

- it does not occur at a stop or restart- it is not systematic on the same weld for pressure welds or load carrying attachment welds.

3011-30143021-30243033041-3043

Slag inclusions (all)Flux inclusions (all)Oxide inclusionsMetallic inclusions (all)

666

6,7

Not permitted shall be removed e. g. by grinding

4011-4013 Lack of fusion (all) 8 Not permitted

402 Lack of penetration 9 Not permitted If a full penetration weld is required

5011-5012 Undercut 11 B2) C C 2) t � 16 mm : h � 0,5 mm for longimperfections

6 mm � t < 16 mm: h �= 0,3 mm for longimperfections;h �= 0,5 mm forshort imperfections

t < 6 mm: h < 0,3 mm forshort imperfections

5013 Shrinkage grove 21 B C C

502 Excessive weld metal 12 B C C Smooth transition is required.Weld toe angle � 120�

503 Excessive convexity 13 C C C Same as for 502

504 Excess penetration 16 B C C

5041 Local excess penetration 17 B B C

506 Overlap 22 Not permitted

507 Linear misalignment 18 See EN 13480-4

508 Angular misalignment - See EN 13480-4

509 Sagging 19 B B B

511 Incompletely filled groove 19 B B B

512 Excessive asymmetry offillet welds

20 D D D

512 Excessive asymmetry offillet welds

20 D D D

515 Root concavity 21 B B B Long imperfection: not permitted(continued)Li

cens

ed C

opy:

she

ffiel

dun

shef

field

un, n

a, T

hu S

ep 2

1 06

:58:

47 B

ST

200

6, U

ncon

trol

led

Cop

y, (

c) B

SI

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EN 13480-5:2002 (E)Issue 1 (2002-05)

20

Table 8.4-2 (concluded)

Identification of surface imperfection Maximum permitted imperfection

Piping class in accordance withEN 13480-1:2002, Table 4.1-1

III II I

EN ISO 6520-1:1998,

Referencenumber

Designation EN 25817:1992

Referencenumber

EN 25817:1992, quality level

Additional requirements

a

516 Root porosity - Not permitted

517 Poor restart 23 Not permitted

601 Stray flash 24 Not permitted shall be removed, e.g. by grinding plus MT or PTor ensure that no crack is left

602 Spatter 25 Not permitted NOTE: in the special case of circumferentialwelded fins which are attached to tubes by amechanised welding process, spatter shall beminimised, but any produced may remain,regardless of the material or heat treatmentinvolved.

603 Torn surface - Not permitted shall be ground, a smooth transition is required.

604 Grinding mark Not permitted shall be ground flash, a smooth transition isrequired

605 Chipping mark Not permitted shall be ground flash, a smooth transition isrequired.

606 Under flushing Not permitted any local underflushing shall be related to thedesign characteristics (calculated thichness +corrosion allowance = minimum thickness forbase material)

(Thickness shall be measured by ultrasonicmethod)

a Symbols according to EN 25817:1992.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

21

Table 8.4-3 — Additional requirements for acceptance criteria for internal imperfections detected by RT

Identification of internal imperfection Maximum permitted imperfection

Piping class in accordance withEN 13480-1:2002, Table 4.1-1

III II I

ENISO 6520-1

:1998Reference

number

Designation EN 25817:1992

Referencenumber

EN 25817:1992, quality level

Additional requirements

a

1001-1064 Cracks (all) 1 Not permitted

2011-2016 Gas cavity (all) 3-5 B B C For No 2012, the distance between two poresshall always be greater than twice the diameterof the bigger one, and not less than 4 mm (toensure that there is no chance of having a lack offusion)

For No 2014 same as for uniformly distributedpores.

For No 2015 and 2016 l = 0,3 t, maximum 5 mm,and w = 2 mm

2021-2024 Shrinkage cavity (all) - Not permitted

3011-30143021-3024303

Slag inclusions (all)Flux inclusions (all)Oxide inclusions

6 1) 1) w = 0,3 t, maximum 3 mm and depending ofthe application:

1 < t � 25 mm

In case of several line at slag inclusions with adistance between 2 of them less than twice thelongest of them, the total length is to beconsidered as a defect.

3042 Metallic inclusions (copper) 7 Not permitted

3041 and3043

Metallic inclusions (allothers)

- 2) 2) Same as for gas cavities No 2011 – 2012 –2013

4011-4013 Lack of fusion (all) 8 Not permitted

402 Lack of penetration 9 Not permitted If a full penetration weld is required

– Multiple imperfections inany cross section

26 B B B

a Symbols according to EN 25817:1992, w = maximum size of cavity

8.4.3 Personnel qualification

Testing shall be carried out by an individual certified to at least EN 473:2000, level 1, under the supervision ofpersonnel certified to level 2 or level 3 who shall also be responsible for the evaluation of the results.

Visual examination shall be performed and evaluated by an individual with sufficient knowledge and experience withthe relevant standards and specifications. Certifications in accordance with EN 473 are not required.

Ultrasonic testing shall be performed and evaluated by an individual certified to at least EN 473:2000, level 2.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

22

8.4.4 Selection of NDT method

8.4.4.1 Surface testing

For the selection between MT or PT, see 8.1.1.1 f) and also footnote c in Table 8.2-1.

The term “visual examination” shall be understood to mean observation of the portion of components, joints, andother piping elements and supports that are or can be exposed to view before, during, or after manufacture,fabrication, assembly or installation.

NOTE This examination may include verification of dimensions, weld edge, joint preparation, alignment, joining (welding,bonding, brazing, or other methods of joining) supports, assembly and installation.

8.4.4.2 Volumetric testing

Depending on wall thickness, type of weld and type of material, the NDT method shall be selected according toTable 8.4-4.

Table 8.4-4 — Selection of NDT techniques for detection of welding imperfections (volumetric testing) infull penetration joints, based on EN 12062:1997

Material and Typeof Joint

Parent Material Nominal Thickness (e in millimetres)

e < 8 8 � e < 15 15 � e < 40 e � 40

FerriticButt Joints

RT RT or (UT) RT or UT UT or (RT)

FerriticT-Joints

RT RT or (UT) RT or UT UT or (RT)

AusteniticButt Joints

RT RT RT or (UT a) UT a or RT

AusteniticT-Joints

RT RT RT or (UT a) UT a or RT

NOTE Where two techniques are shown, the least preferred is shown between brackets

a UTD (in accordance with EN 1714:1998, class D) requires a specific written instruction

8.5 Reports

Reports of non-destructive testing shall be drawn up in accordance with the European Standard for the testingmethod.

8.6 Weld repairs

Procedures for weld repair shall be in accordance with EN 13480-4 and shall be submitted to the inspector forreview and approval prior to commencement of the repair.

Weld imperfections, which have been assessed as weld defects, shall be repaired in accordance with EN 13480-4and inspected again after repair.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

23

NOTE The inspector may require additional inspections during the repair.

Where imperfections are identified but cannot be adequately evaluated, an alternative test shall be performed orthe imperfection repaired.

The maximum allowable number of subsequent repairs shall be in accordance with EN 13480-4.

9 Final assessment and documentation

9.1 General

Prior to final certification, the manufacturer shall carry out a final assessment to verify that the piping system hasbeen manufactured in compliance with all specified requirements. The required documentation shall then becompiled.

9.2 Final inspection

9.2.1 General

The final inspection shall consist of the following:

� a visual inspection before the proof test;

� a visual inspection after the proof test;

� review of the manufacturing documents.

All testing and inspections shall be documented.

9.2.2 Visual inspection before the proof test

A visual inspection shall be carried out externally and internally, where possible, prior to completion of the externalcoating. The visual inspection shall verify that:

� dimensions and orientations comply with design requirements of the piping system;

� components, supports, assembly and installation comply with the other requirements of the designspecification and this European Standard.

9.2.3 Visual inspection after the proof test

The visual inspection shall verify that there has been no deterioration resulting from the proof test:

� all blank flanges, fitted to isolate components not subject to pressure test, e.g. safety valve escape piping,bellows or expansion joints, etc. shall have been removed;

� safety valves or relief devices required by the design or this standard shall have been correctly installed andare of the specified capacity and type. Any gauges fitted to these devices for the purpose of pressure testingshall have been removed.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

24

9.2.4 Review of the manufacturing documents

The manufacturer shall carry out a review of the manufacturing documents to verify that all applicable examinationsand tests specified in clauses 7 to 9 have been satisfactorily performed and reported.

9.3 Proof test

9.3.1 General

All piping constructed in accordance with this European Standard shall be subjected to a proof test to demonstratethe integrity of the finished product. The proof test shall always be carried out, under controlled conditions, withappropriate safety precautions and equipment, and in such a way that the persons responsible for the test are ableto make adequate inspections of all pressurised parts.

The proof test shall be a hydrostatic pressure test, except where a hydrostatic pressure test is harmful orimpractical. In these instances, a pneumatic pressure test (see 9.3.3) or other tests (see 9.3.4) shall be performed.

The proof test shall be made when required.

9.3.2 Hydrostatic pressure test

9.3.2.1 Basic requirements for hydrostatic pressure tests

9.3.2.1.1 Where practicable, the finished piping system shall be pressure tested after the installation has beencompleted and all inspections have been performed. If it is not practicable, due to size or mode of manufacture, topressure test a complete piping system, the test procedure to be followed shall be agreed at the design stage.

9.3.2.1.2 All joints shall be left uninsulated and unlined and exposed for examination during pressure testing,except that joints and tubes previously tested in accordance with this standard may be insulated or covered.Painting for corrosion protection shall be permitted, provided, it does not prevent the clear examination of the jointunder test.

9.3.2.1.3 Piping designed for vapour or gas shall be provided with additional temporary supports, if necessary,to support the weight of the test liquid.

9.3.2.1.4 Expansion joints shall generally be pressure tested in both, the manufacturers shop and in place in thepiping system. They shall be subjected to a test pressure according 9.3.2.2.1. If the test pressure

ptest > 1,5 PS E20/Ec (9.3.2-1)

expansion joints may be provided with restraints to stabilise the bellows against squirm whilst being tested,

where

EC is the modulus of elasticity at design temperature.

E20 is the modulus of elasticity at 20 °C;

PS is the maximum allowable pressure in bar;

ptest is the test pressure in bar;Lice

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EN 13480-5:2002 (E)Issue 1 (2002-05)

25

9.3.2.1.5 Equipment which is not to be tested shall be either disconnected from the piping or isolated by blankflanges or other means during the test.

NOTE A valve may be used, provided the valve (including its closure mechanism) is suitable for the test pressure.

9.3.2.1.6 No piping shall be subject to any form of shock loading such as hammer testing when undergoingpressure testing.

9.3.2.1.7 When dial indicating and recording pressure gauges are used, the dial shall be graduated over a rangeof approximately double the intended maximum pressure, but in no case shall the range be less than 1,5 or morethan 4 times that pressure.

9.3.2.1.8 When components are to be pressure tested, the indicating gauges shall be connected to thecomponent, or to the component from a remote location, with the gauges readily visible to the operator controllingthe pressure throughout the duration of pressurising, testing and depressurising or venting of the component.

NOTE 1 For large piping systems where more than one gauge is specified or required, a recording type gauge isrecommended.

NOTE 2 It is recommended that a small pressure relief valve set to 1,1 times the test pressure is attached to the pressuretest system in order to avoid excess pressure being developed.

9.3.2.1.9 All indicating and recording type gauges used shall be calibrated to the appropriate gauge standard.

9.3.2.1.10 Piping which has been repaired following the hydrostatic pressure test shall be subjected again to thespecified pressure test after completion of the repair and any required post-weld heat treatment, unless otherwiseagreed between the parties involved.

9.3.2.2 Detailed requirements for the hydrostatic pressure test

9.3.2.2.1 The test pressure shall be not less than the greater of the two values determined by the following:

ff

PSp testtest 1,25= (9.3.2-2)

or

PSp 431,=test (9.3.2-3)

where

f is the nominal design stress for design conditions at design temperature, in N/mm2 ;

f test is the nominal design stress for design conditions at test temperature, in N/mm2 ;

PS is the design pressure of the piping spool, in bar ;

testp is the test pressure, in bar.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

26

In all cases for each component of the piping the test pressure shall be limited to such a level that it does notgenerate a design stress greater than that given in EN 13480-3 for testing conditions, by reducing, if necessary, thetest pressure.

NOTE 1 This condition may be waived in those cases of different materials, where the hydrostatic pressure test wouldnecessitate a redesign or where the pressure test can lead to an overloading of bolts during the pressure test.

In cases where piping is operated in the creep range, further considerations shall be taken into account.

The applied test pressure shall include the amount of any static head acting in service and in testing at the pointunder consideration.

NOTE 2 However, the static pressure caused by the content of the piping during service and/or testing does not need to betaken into account if it does not increase the stress in the wall by more than 5 %.

For each piping spool, the test pressure shall be limited to such a level that it does not generate a design stressgreater than that given in EN 13480-3 for the test conditions by reducing, if necessary, the test pressure. For furtherdetails, see EN 13480-3.

It shall be ensured that the structures, which are not provided by those responsible for the supply of the pipingsystem, are able to support the loads created by the hydrostatic test.

Prior to the hydrostatic test, the strength of temporary supports shall be verified.

Air pockets in the piping system shall be avoided. Means shall be provided to prevent air pockets in pipe sectionsunder test.

As a general rule, the hydrostatic test shall be performed with water. The quality of the water shall be such as toprevent both corrosion and any residual impurities.

NOTE 3 In most cases the hydrostatic test may be performed with general supply water.

For hydrostatic tests of austenitic stainless steel piping systems, the halogen concentration of the water shall becontrolled and shall not exceed a volume fraction of 50 × 10-6.

The pressurizing fluid shall have a temperature sufficiently high that the risk of brittle fracture is avoided, seeEN 13480-2:2002.

Where a pressurising fluid other than water is used, care shall be taken to identify any additional hazardsassociated with the fluid. All of the following conditions shall be satisfied: the pressuring medium shall

� be non toxic;

� have a flash-point 60 �C or above (closed cup test) and shall not be utilised within 25 �C of that flash point;

� have a temperature at least 10 �C below atmospheric boiling temperature and at least 5 �C above solidificationpoint.

NOTE 4 For drinking water supply piping, drinking water should be used for the pressure test.

Heavy walled piping shall not be pressurised until the metal temperature is approximately equal to that of thepressurisation medium. If the toughness of the material, or of the component, imposes a limit on the testtemperature or on the rate at which the pressure is increased, account shall be taken of this and documented in thetest data certificate.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

27

9.3.2.2.2 The pressure of piping under test shall be increased to a value of approximately 50 % of the specifiedtest pressure. Thereafter, the pressure shall be increased in steps of approximately 10 % of the specified testpressure until it is reached. The piping system shall be held at the test pressure for a period of at least 30 min. Thepressure shall then be reduced to the design pressure and all components and welded joints subjected to a closevisual examination of all surfaces and joints. During this examination, the piping shall show no signs of generalplastic yielding.

9.3.2.2.3 During the hydrostatic test, the external surface of the piping system shall be kept in such a conditionthat leaks can be detected.

The hydrostatic test shall be passed if no leakage or visible plastic deformation is observed.

The details of the hydrostatic test shall be documented.

9.3.2.2.4 The pressure shall be relieved before draining. Where vacuum conditions can occur when draining thinwall piping, venting shall be provided to prevent its collapse.

9.3.3 Pneumatic pressure test

Pneumatic tests shall only be permitted in cases where a hydrostatic pressure test is detrimental to the piping systemor is not practical, i.e.

� for piping that is to be used in processes where even small traces of liquid are intolerable ;

� following consultation at the design stage on the adequacy of the safety precautions proposed by the pipingmanufacturer.

The requirements of 9.3.1 shall be fulfilled.

Due to the hazard involved in pressure testing using a compressible medium, special consideration shall be given tofactors such as :

a) location of the piping system and its position relative to other buildings, plants, public roads, and areas open topublic and all other equipment and structures in the vicinity of the piping system to be tested;

b) maintaining during the test the highest practicable standards of safety and ensuring that only personnelinvolved in the testing have access to the testing area, that if the testing is not performed in a special room theregion in the immediate vicinity of the testing area is sealed off and warning signs used highlighting the dangerzone and prohibited area;

c) NDT by MT or PT from the inner surface of the welds which have not been subjected 100 % volumetric testing as required for the longitudinal seams. If the inner surface is not accessible UT shall be performed before thepressure test. The amount of testing shall be 10 % of all circumferential welds including all butt joints of thepiping under consideration;

NOTEConsideration may be given to the use of acoustic emission.

d) resistance of the piping system materials to fast fracture and the absolute necessity of avoiding brittle fracture.

e) metal temperature at which shall be at least 25 �C above the brittle fracture temperature required in EN 13480-2:2002, Annex B for piping systems. Attention is drawn to the fact that if the gas pressure is reduced to thepiping system under test from high pressure storage, its temperature will fall. Therefore the equipment providedby the piping systems manufacturer shall be such that the temperature of the gas entering the piping systemsexceeds the minimum temperature indicated.

f) the extent of remote monitoring provided during the test.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

28

The test pressure shall be in accordance with 9.3.2.2

The pressure shall be gradually increased to a value of 50 % of the required test pressure. Thereafter the pressureshall be increased in steps of approximately 10 % of the required test pressure until this is reached. The pressureshall then be reduced after 10 min to the inspection pressure pi.

ffpp

t

asi = (9.3.3-1)

and held during the inspection of the piping.

9.3.4 Other tests

In cases where a hydrostatic or pneumatic pressure test of individual welds (connection welds) would be detrimentalor impractical they shall be substituted by an appropriate non-destructive test (100 % RT or UT and 100 % PT or MT)subject to agreement between the parties involved. If for specific materials, e.g. glas linings, the calculated stresses inthe piping are lowered to less than 70 % of the nominal stress for the design condition of the steel structure, this maybe taken into account when the test pressure and the amount of non-destructive testing is specified. The results ofthis testing shall achieve the same level of safety.

Consideration shall be given to final testing at an early stage in the design cycle, so that arrangements can bemade to ensure that the individual component receive an appropriate test.

9.3.5 Documentation of the proof test

The essential data of the proof test shall be confirmed in a test certificate. Where the proof test is not carried out usingwater, the test medium used shall be recorded.

9.4 Inspection of safety systems

For inspection of safety systems see Annex A.

9.5 Documentation

9.5.1 Final documentation package

The final documentation package shall contain the design and manufacturing documentation package and theoperating instructions. The content of the final documentation package shall be as specified in Table 9.5-1.

NOTE The final documentation may contain copies of the original documents, except for documents no. 14 to16.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

29

Table 9.5-1 — Final documentation

No. Documents Clause Piping class Piping below0,5 bar

III II I 0

1 Piping and instrumentation diagram (P &I diagram)

6.2 � � � �a

�a

2 Summary of design and operatingconditions

� � � �a

�a

3 Drawings of the layout of the piping andpiping supports with dimensions, (mayinclude isometric drawings, as builtdrawings, views, ground layouts).

6.2

6.3.1

� � � �a

�a

4 Parts lists for piping components withdimensions, standards, materials

6.2 � � �a

�a –

5 Material certificates for base materialsand welding consumables, if required

7.2.2 � � �a See EN

13480-2–

6 Documentation for miscellaneouscomponents, e.g. valves, safetyequipment

6.3.1 � � �a

�a

�a

7 Welding documents 6.2.3 � � �a

�a –

8 NDT documents 6.2.28.8

� � � – –

9 Heat treatment documents 6.2.2 � � � – –

10 Pressure test or equivalent testdocuments

6.2.2 � � � �a –

11 Marking information EN13480-4:

2002,11.2

� � � � �a

12 Declaration of design compliance 6.5 � � � – –

13 Declaration of compliance for pipingfabrication/installation

10 � � � – –

14 Pressure test certificate 9.3.4 � � � – –

15 Declaration of compliance 10 � � � – –

16 Operating instructions 9.5.3 � � � � �

a dependant on manufacturer's decision

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EN 13480-5:2002 (E)Issue 1 (2002-05)

30

9.5.2 Design and manufacturing documentation package

The manufacturer shall compile a design and manufacturing documentation package in such a way that the designand manufacture of the piping may be assessed against the requirements of this standard and the agreed design.

9.5.3 Operating instructions

The manufacturer shall compile operating instructions for the user, containing all necessary information relating toputting into service, operation and proposed maintenance and user in-service-inspections of the piping system.

The operating instructions shall cover the design data and main dimensions of the piping delivered as well as theinformation contained in the marking. Where appropriate, these instructions shall also include those documents,drawings and diagrams which are necessary for a full understanding of the operation instructions.

9.5.4 Documentation for the purchaser

A copy of the final documentation package shall be delivered to the purchaser after completion of the contract. Inaccordance with the agreement between the parties concerned the design and manufacturing documentationpackage may be delivered in full or parts thereof.

10 Declaration/Certification

The compliance of the piping design, fabrication, installation and pressure testing with EN 13480 shall bedeclared/certified separately.

On satisfactory completion of final assessment, assembly of documentation and completion of requiredcertification, the manufacturer shall issue a declaration of compliance with this European Standard (see CEN/TR13480-7).

NOTE See CEN/TR 13480-7 for guidance on the requirements for EC declaration of conformity.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

31

Annex A(informative)

Inspection of safety systems

This annex contains recommendations for the inspection of the safety systems before the industrial piping is goinginto operation and during service.

Safety valves (direct loaded, pilot-operated or a combination thereof) and the main valve of a CSPRS should beexamined for:

� free movement of all moving parts;

� the set pressure;

� the size of the full lift as specified;

� the external and internal tightness;

� all other parameters indicated in the manufacturer's technical documentation.

This examination should be repeated after every discharge of the direct loaded safety valves.

For safety devices containing bursting discs, the replacement period of the bursting discs should be established. Tothis purpose, the coincident temperature and pressure cycles during operation and other foreseeable conditionsshould be assessed.

After an in-service period, the bursting disc should be re-examined and tested in order to adjust the replacementperiod where necessary.

All other safety systems and their function should be regularly inspected to ensure that the properties specified arestill available.

Record should be kept on both the procedures and results.

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EN 13480-5:2002 (E)Issue 1 (2002-05)

32

Annex ZA(informative)

Clauses of this European Standard addressing essential requirements orother provisions of EU directives

This European standard has been prepared under a mandate given to CEN by the European Commission and theEuropean Free Trade Association and supports essential safety requirements of the Pressure Equipment Directive97/23/EC with regard to inspection and testing requirements for metallic industrial piping.

WARNING Other requirements and other EU Directives may be applicable to the product(s) falling within the scopeof this standard.

The following clauses of this standard given in Table ZA.1 are likely to support the essential safety requirements ofthe Pressure Equipment Directive 97/23/EC.

Table ZA.1 — Comparison between EN 13480-5 and the Pressure Equipment Directive 97/23/EC withrespect to inspection and testing requirements for metallic industrial piping

EN 13480-5harmonised clauses

Content Directive 97/23/EC,Annex I

5.1 to 5.3 inspection and testing requirements 1.1

6 manufacturing procedures 3.1

7 Permanent joining 3.1.2

8.1 preparation of component parts 3.1.1

8.4 Personnel for non-destructive tests 3.1.3

8.2 and 8.4 non-destructive testing 7.2

9.2 final inspection 3.2.1

9.3 proof test 3.2.2

9.5.3 andTable 9.5-1

operating instruction 3.4

9.5.1 and9.5.2

documentation 3.1.1

Compliance with these clauses of this standard provides one means of conforming with the specific essential safetyrequirements of the Directive concerned and associated EFTA regulations.

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BS EN 13480-5:2002

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