ISO 15614_7

THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BEREFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.

IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFTINTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TOWHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.

DRAFT INTERNATIONAL STANDARD ISO/DIS 15614-7

© International Organization for Standardization, 2004

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION

ISO/TC 44/SC 10

Voting begins on:2004-08-19

Secretariat: DIN

Voting terminates on:2005-01-19

Specification and qualification of welding procedures for metallic materials — Welding procedure test —

Part 7:Overlay welding

Descriptif et qualification d'un mode opératoire de soudage pour les matériaux métalliques — Épreuve de qualification d'un mode opératoire de soudage —

Partie 7: Rechargement par soudage

ICS 25.160.10

ISO/CEN PARALLEL ENQUIRY

This draft International Standard is a draft standard developed within the European Committee forStandardization (CEN) and processed under the CEN-lead mode of collaboration as defined in theVienna Agreement. The document has been transmitted by CEN to ISO for circulation for ISO memberbody voting in parallel with CEN enquiry. Comments received from ISO member bodies, including thosefrom non-CEN members, will be considered by the appropriate CEN technical body. Should this DIS beaccepted, a final draft, established on the basis of comments received, will be submitted to a parallel two-month FDIS vote in ISO and formal vote in CEN.

To expedite distribution, this document is circulated as received from the committee secretariat.ISO Central Secretariat work of editing and text composition will be undertaken at publicationstage.

Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu dusecrétariat du comité. Le travail de rédaction et de composition de texte sera effectué auSecrétariat central de l'ISO au stade de publication.

ISO/DIS 15614-7

ii © ISO 2004 – All rights reserved

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ISO/DIS 15614-7

iii

Contents

Foreword......................................................................................................................................................................v

Introduction.................................................................................................................................................................v

1 Scope ..............................................................................................................................................................1

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

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

4 Principles of qualification .............................................................................................................................34.1 Cladding..........................................................................................................................................................34.2 Hard facing .....................................................................................................................................................34.3 Build up...........................................................................................................................................................34.4 Buttering.........................................................................................................................................................4

5 Welding procedure tests...............................................................................................................................4

6 Test piece .......................................................................................................................................................46.1 Shape and dimensions of test pieces .........................................................................................................46.2 Welding of test pieces...................................................................................................................................6

7 Examination and testing ...............................................................................................................................77.1 Extent of testing.............................................................................................................................................77.2 Location and taking of test specimens .......................................................................................................77.3 Non-destructive testing.................................................................................................................................97.4 Destructive testing ......................................................................................................................................107.5 Acceptance criteria......................................................................................................................................117.6 Re-testing .....................................................................................................................................................12

8 Range of qualification .................................................................................................................................138.1 General..........................................................................................................................................................138.2 Related to the manufacturer.......................................................................................................................138.3 Related to the material ................................................................................................................................138.4 Related to the filler metal ............................................................................................................................158.5 Common to welding procedures................................................................................................................168.6 Specific to welding processes ...................................................................................................................17

9 Welding procedure qualification record (WPQR).....................................................................................19

Annex A (informative) Welding Procedure Qualification Record form (WPQR) ..................................................20

Annex ZA (informative) Clauses of this European Standard addressing essential requirements or otherprovisions of EU directives ........................................................................................................................23

Figures

Figure 1 � Test piece � plate.......................................................................................................................................5

Figure 2 � Test piece � tube .......................................................................................................................................6

Figure 3 � Location of test specimens for surfacing on plate ....................................................................................8

Figure 4 � Location of tests specimens for surfacing on pipe.....................................................................................9

Figure 5 � Hardness traverse for overlay..................................................................................................................10

Figure 6� Chemical analysis specimen for corrosion/resistant surfacing, building-up and hard surfacing weld metaloverlay .................................................................................................................................................................16

ISO/DIS 15614-7

iv

Tables

Table 1 � Examination and testing of the test pieces .................................................................................................7

Table 2� Permitted maximum hardness values........................................................................................................12

Table 3 � Range of qualification for steel groups and sub-groups ...........................................................................14

Table 4� Range of qualification for parent metal thickness ......................................................................................15

Table ZA � Relation between this European standard and the Directive 97/23/EC...................................................23

DRAFT INTERNATIONAL STANDARD ISO/DIS 15614-7

1 © ISO 2004 � All rights reserved

Specification and qualification of welding procedures for metallicmaterials � Welding procedure test � Part 7: Overlay welding

1 Scope

This standard is part of a series of standards, details of this series are given in EN ISO 15607:2003, Annex A.

This standard specifies how a preliminary welding procedure specification for overlay welding is qualified bywelding procedure tests.

This standard defines the conditions for execution of welding procedure tests and the range of qualification forwelding procedures for all practical welding operations within the range of variables listed in clause 8.

Tests shall be carried out in accordance with this standard. Additional tests may be required by applicationstandards.

This standard applies to all welding processes suitable for overlay welding. The principles of this standard may beapplied to other application if required by the design specification.

Overlay welding can be carried out in accordance with the processes listed in EN ISO 4063:

111 manual metal arc welding (metal arc welding with covered electrode);

12 submerged arc welding;

131 metal inert gas welding; MIG welding;

135 metal active gas welding; MAG welding;

136 tubular cored metal arc welding with active gas shield;

141 tungsten inert gas welding; TIG welding;

15 plasma arc welding;

311 oxy-acetylene welding;

51 electron beam welding;

52 laser welding;

72 electroslag welding.

The principles of this standard may be applied to other welding processes.

This standard does not apply to overlay welding in which method related to cracks are necessary for the applicationof the product (e.g. special hard facing applications).

ISO/DIS 15614-7

© ISO 2004 � All rights reserved 2

2 Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).

EN 439, Welding consumables � Shielding gases for arc welding and cutting.

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

EN 760, Welding consumables � Fluxes for submerged arc welding � Classification.

EN 910, Destructive tests on welds in metallic materials � Bend tests.

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

EN 1043-1, Destructive tests on welds in metallic materials � Hardness test � Part 1:Hardness test on arc weldedjoints

EN 1043-2, Destructive tests on welds in metallic materials � Hardness test � Part 2: Micro hardness testing onwelded joints

EN 1321, Destructive tests on welds in metallic materials � Macroscopic and microscopic examination of welds.

EN 1714, Non destructive examination of welds � Ultrasonic examination of welded joints.

EN ISO 4063, Welding and allied processes � Nomenclature of processes and reference numbers(ISO 4063:1998).

EN ISO 5817, Welding � Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) �Quality levels for imperfections (ISO 5817:2003).

EN ISO 6947, Welds � Working positions � Definitions of angles of slope and rotation (ISO 6947:1993).

EN ISO 15607:2003, Specification and qualification of welding procedures for metallic materials � General rules(ISO 15607:2003).

CR ISO 15608, Welding � Guidelines for a metallic material grouping system for fabrication purposes.

prEN ISO 15609-1, Specification and qualification of welding procedure for metallic materials � Welding procedurespecification � Part 1: Arc welding (ISO/FDIS 15609-1:2003).

EN ISO 15609-2, Specification and qualification of welding procedures for metallic materials � Welding procedurespecification � Part 2: Gas welding (ISO 15609-2:2001).

prEN ISO 15609-3, Specification and qualification of welding procedures for metallic materials � Weldingprocedure specification � Part 3: Electron beam welding (ISO/FDIS 15609-3:2003).

prEN ISO 15609-4, Specification and qualification of welding procedures for metallic materials � Weldingprocedure specification � Part 4: Laser beam welding (ISO/FDIS 15609-4:2003).

prEN ISO 15609-5, Specification and qualification of welding procedure for metallic materials � Welding procedurespecification � Part 5: Resistance welding (ISO/FDIS 15609-5:2003).

prEN ISO 15609-6, Specification and qualification of welding procedure for metallic materials � Welding procedurespecification � Part 6: Laser beam cladding.

prEN ISO 15613, Specification and qualification of welding procedure for metallic materials � Qualification basedon pre-production welding test (ISO/FDIS 15613:2003).

ISO/DIS 15614-7


prEN ISO 15614-1, Specification and qualification of welding procedures for metallic materials � Weldingprocedure test � Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO/FDIS15614-1:2003).

3 Terms and definitions

For the purposes of this standard, the definitions given in EN ISO 15607 and the following apply.

3.1overlay weldingsurfacing by welding

3.2claddingoverlay welding used to obtain improved corrosion and/or heat resistance

3.3hard facingoverlaywelding to increase wear and/or impact resistance

3.4butteringoverlaywelding on a parent metal to provide a suitable transition between the parent metal and subsequent welds,specially used for dissimilar weld

3.5build upoverlay welding used to obtain or restore required dimensions of similar grade as the parent metal

3.6buffer layera layer on a parent metal to provide a suitable metallurgical transition with the final overlay

4 Principles of qualification

4.1 Cladding

The preliminary welding procedure specification shall be in accordance with prEN ISO 15609-1, prEN ISO 15609-3and prEN ISO 15609-4. It shall specify the tolerances for all the relevant parameters.

The welding procedure shall be qualified in accordance with clauses 5 to 8.

4.2 Hard facing

The preliminary welding procedure specification shall be in accordance with prEN ISO 15609-1, EN ISO 15609-2,prEN ISO 15609-3 and prEN ISO 15609-4. It shall specify the tolerances for all the relevant parameters.

The welding procedure shall be qualified in accordance with clauses 5 to 8.

4.3 Build up

The preliminary welding procedure specification shall be in accordance with prEN ISO 15609-1. It shall specify thetolerances for all the relevant parameters.

The welding procedure shall be qualified in accordance with prEN ISO 15613 or prEN ISO 15614-1.

ISO/DIS 15614-7


4.4 Buttering

The preliminary welding procedure specification shall be in accordance with prEN ISO 15609-1. It shall specify thetolerances for all the relevant parameters.

If buttering is used for welding between dissimilar materials, the welding procedure shall be qualified in accordancewith prEN ISO 15614-1.

If buttering is used to produce a metallurgically compatible weld metal between the parent metal and cladding orhard facing, the welding procedure shall be qualified in accordance with clauses 5 to 8.

5 Welding procedure tests

For welding procedure qualification, a test piece shall be welded using the same welding process as the one usedin production.

The welding and testing of test pieces shall be in accordance with clauses 6 and 7.

6 Test piece

6.1 Shape and dimensions of test pieces

6.1.1 General

Testing of overlay welding shall be carried out on a standardized test piece or pieces in accordance with the pWPSrepresenting the production conditions.

The length or number of test pieces shall be sufficient to allow all required tests to be carried out (see Figures 1and 2).

The thickness and/or diameter of the test pieces at the point where welding is performed shall be selected inaccordance with the range of qualification.

6.1.2 Cladding and hard facing

A minimum of three beads for the last layer is required.

6.1.3 Buffer layer

If a buffer layer is used in production welding, it shall be used in welding the test piece.

ISO/DIS 15614-7


Dimensions in millimetres

a) Axial welding b) Circular welding

Key

1 Number of layers in accordance with the pWPS2 Welding directionDpt material thickness

Figure 1 � Test piece � plate

ISO/DIS 15614-7


Dimensions in millimetres

a) Axial welding b) Circumferential welding

Key

12 Welding directionDeDit material thickness

Figure 2 � Test piece � tube

If any essential variables which do not affect metallurgical properties in accordance with the WPS(prEN ISO 15609-1) � (e.g. welding from inside tube, machinery) are changed, a pre-production test in accordancewith prEN ISO 15613 shall be carried out before starting production.

6.2 Welding of test pieces

6.2.1 Welding

Preparation and welding of test pieces shall be carried out in accordance with the pWPS and under the sameproduction conditions under which they are to represent. Welding and testing of the test pieces shall be witnessedby an examiner or an examining body.

6.2.2 Preheating, interpass temperature and post weld heat treatment (PWHT)

The preheating,interpass temperatures and post weld heat treatment (PWHT) depend on the filler metal and theparent metal used. Depending on the type of overlay, the pWPS may be completed with the heating rate andcooling rate if necessary for the purpose of use.

ISO/DIS 15614-7


7 Examination and testing

7.1 Extent of testing

Testing includes both non-destructive testing (NDT) and destructive testing which shall be in accordance with therequirements of Table 1.

Table 1 � Examination and testing of the test pieces

Test piece Type of test Extent of testing Footnote

Cladding - Visual testing- Ultrasonic testing- Surface crack detection- Transverse side bend test- Macroscopic examination- Microscopic examination- Chemical analysis- δ ferrite content- Hardness test

100 %100 %100 %2 specimen1 specimen1 specimen1 specimen1 specimen1 survey

-abc-d--d

Hard facing - Visual testing- Surface crack detection- Macroscopic examination- Hardness test- Microscopic examination- Transverse side bend test

100 %100 %1 specimen1 survey1 specimen2 specimens

-b--d-

a If required, in accordance with the relevant specification.

b Penetrant testing or magnetic particle testing. For non-magnetic materials, penetrant testing.

c In the case of test piece 2a) transverse bend test may be replaced by UT plus two additional macroexaminations.

d not required for material group 1.

7.2 Location and taking of test specimens

Test specimens shall be taken in accordance with Figures 3 and 4.

Test specimens shall be taken after NDT has shown satisfactory result. It is permitted to take the test specimensfrom locations avoiding areas showing acceptable imperfections.

It is acceptable to take the test specimens from locations avoiding areas which have imperfections within theacceptance limits for the NDT method(s) used.

ISO/DIS 15614-7


a) Axial deposit b) Circumferential deposit

Key

1 Discard ≥25 mm of deposited metal2 Area for:

- 1 transverse side bend specimen.3 Area for:

- 1 macro test specimen- δ ferrite content, chemical analysis- 1 micro test specimen with hardness test.- re-test.

4 Area for:- 1 transverse side bend specimen ;

5 Welding direction

Figure 4 � Location of tests specimens for surfacing on pipe

7.3 Non-destructive testing

All non-destructive testing in accordance with 7.1 and Table 1 shall be carried out on the test pieces prior to cuttingof the test specimens. Any post-weld heat treatment that is specified shall be completed prior to non-destructivetesting.

The ultrasonic examination shall be conducted to detect disbanding of the overlay and lack of fusion in accordancewith 7.1.

Depending upon joint geometry, materials and the requirements for work, the NDT shall be carried out inaccordance with EN 970 (visual examination), EN 571-1 (penetrant testing) and, only by reference, to EN 1714(ultrasonic testing).

The acceptance levels stated in 8.2.1 and 8.2.2 shall apply.

ISO/DIS 15614-7


7.4 Destructive testing

7.4.1 General

The extent of testing shall be as required by Table 1.

7.4.2 Macro/microscopic examination

The test specimen shall be prepared and etched in accordance with EN 1321 on one side to clearly reveal thefusion line, the HAZ and the build up of the layers.

The macroscopic examination shall include unaffected parent metal and shall be recorded by taking at least onemacro-reproduction per procedure test.

When microscopic examination is required (see Table 1), a photograph of the parent metal, of the transition to theparent metal (heat affected zone) shall be taken. In all cases, microscopic examination of the overlay, with micro-reproduction, is required. The acceptance levels stated in 7.5.2.1 and 7.5.2.2 shall apply.

7.4.3 Hardness testing

Vickers hardness testing with a load of HV10 or HV 5 shall be performed in accordance with EN 1043-1. TheVickers method HV 10 or HV 5 shall be used. The indentation shall be made in accordance with Figure 5. Theresults from the hardness test shall be in accordance with 8.2

In all cases a hardness traverse shall be performed at an angle of 15° to the surface including the overlay, HAZand parent metal.

For hardfacing, a minimum of five indentations shall be made on the machined surface of the test piece. Sincesurface hardness is a function of the thickness of the surfacing, these results should be recorded for information.

Key

1 Buffer a

a See 6.1.

Figure 5 � Hardness traverse for overlay

7.4.4 Side bend testing

Specimens and testing shall be in accordance with EN 910. The width of the test specimen shall be the fullthickness of the test piece.

In the case of hardfacing, if machining of the overlay is necessary, the specimen shall be tested in the machinedstate.

ISO/DIS 15614-7


7.4.5 Chemical analysis

For corrosion resistant overlay, the chemical composition shall be determined in accordance with the applicationstandard and/or specification. If the corrosion resistant layer is to be machined in production, an additionalchemical analysis should be carried out in the minimum thickness after machining.

7.4.6 δδδδ ferrite content

When required, the ferrite content shall be determined in accordance with the relevant specification.

7.5 Acceptance criteria

7.5.1 Non-destructive testing

7.5.1.1 Visual examination

Cracks and other planar defects are not permitted.

Surface pores > 2 mm are not permitted.

7.5.1.2 Surface detection

No linear indication is permitted.

No rounded indication > 5 mm is permitted.

Four or more rounded indications (of an individual size > 2 mm) in a line, separated by < 2 mm are not permitted.

7.5.1.3 Ultrasonic testing

Any imperfection giving a signal greater than that obtained from an 8 mm diameter flat bottom hole is not permitted.

7.5.2 Destructive tests

7.5.2.1 Macroscopic examination

Cracks and other planar defects are not permitted in the heat affected zone.

Individual pores over 2 mm are not permitted. Small individual cracks (< 1,5 mm) may be accepted if limited to theoverlay in case of hardfacing and Nickel alloy overlay.

A disbonding between the overlay and the parent metal > 8 mm is not permitted.

7.5.2.2 Microscopic examination

Micro-cracks in the heat affected zone (HAZ) of the parent metal are not permitted except otherwise specified.

7.5.2.3 Hardness testing

The hardness values in the HAZ of the parent metal shall not exceed the values in Table 2. For hardfacing, thehardness values of the deposit shall be specified.

ISO/DIS 15614-7


Table 2� Permitted maximum hardness values

Steel groups

CR ISO 15608

Non-heat treated Heat treated

1a, 2 380 320

3b 450 380

4,5 380 320

6 - 350

9.1

9.2

9.3

350

450

450

300

350

350

a If hardness tests are required.

b For steels with min ReH > 890 N/mm2 special values shall be specified.

7.5.2.4 Bend test

The diameter of the former or the inner roller shall be 4t and the bending angle shall be 120° for weld metal withelongation A ≥ 20 %. For weld metal with elongation A < 20 % the following formula shall be applied:

ss100

tAt

d −×

=)(

where

d is the maximum diameter of the former or the inner roller;

ts is the thickness of the bend test specimen;

A is the minimum tensile elongation required by the manufacturer material specification.

During testing, the test specimens shall not reveal any one single flaw > 3 mm in any direction. Flaws appearing atthe corners of a test specimen during testing shall be ignored in the evaluation.

The result of side bend testing shall be in accordance with 7.5.2.4.

For hardfacing, the bend test shall not reveal any disbonding and cracking (> 1,5mm) in the parent metal.

7.6 Re-testing

If the test piece fails to comply with any of the requirements for visual testing or NDT specified in 8.1, one furthertest piece shall be welded and subjected to the same testing. If this additional test piece does not comply with therelevant requirements, the pWPS shall be regarded as not capable of complying with the requirements of thisstandard without modification.

If any test specimen fails to comply with the relevant requirements of 8.1 and 8.2 only due to geometric weldimperfections, two further test specimens shall be obtained for each one that failed. These can be taken from thesame test piece if there is sufficient material available or from a new test piece, and shall be subjected to the sametests.

If either of these additional test specimens do not comply with the relevant requirements, the pWPS shall beregarded as not capable of complying with the requirements of this standard without modification.

ISO/DIS 15614-7


8 Range of qualification

8.1 General

Each of the conditions given in clause 8 shall be met in order to comply with this standard.

Changes outside of the ranges specified shall require a new welding procedure test.

8.2 Related to the manufacturer

A qualification of a pWPS by a welding procedure test according to this standard obtained by a manufacturer isvalid for welding in workshops or sites under the same technical and quality control of the manufacturer.

Welding is under the same technical and quality control when the manufacturer who performed the weldingprocedure test retains complete responsibility for all welding carried out to it.

8.3 Related to the material

8.3.1 Parent metal

In order to minimize the unnecessary multiplication of welding procedure tests, steels shall be grouped as shown inCR ISO 15608.

A separate test piece is necessary for each material group in accordance with CR ISO 15608, a method test onany one steel of this group being valid for all the steels of this group.

For steels, an extension of the range of validity is given in Table 3.

ISO/DIS 15614-7


Table 3 � Range of qualification for steel groups and sub-groups

Material group(s) of test joint Range of qualification Additional range ofqualification

1-1 1a

2-2 2a, 1, 2a - 1

3-3 3a, 2 , 1 3a - 2, 1

4-4 4b 4b - 2,1

5-5 5b 5b - 2,1

6-6 6b 6b - 2,1

7-7 7c

7-3 7c - 3a 7c - 2 , 1

7-2 7c - 2a 7c - 1

8-8 8c

8-6 8c - 6b 8c - 4, 2, 1

8-5 8c - 5b 8c - 6.2, 6.1, 4, 2, 1

8-3 8c - 3a 8c - 2, 1

8-2 8c - 2a 8c - 1

9-9 9b

10-10 10b

10-8 10b - 8c

10-6 10b - 6b 10b - 4 , 2 , 1

10-5 10b - 5b 10b - 6.2, 6.1, 4, 2, 1

10-3 10b - 3a 10b - 2, 1

10-2 10b - 2a 10b - 1

11-11 11b 11b - 1

a Covers the equal or lower specified yield strength steels of the same group.

b Covers steels in the same sub-group and any lower sub-group within the same group.

c Covers steels in the same sub-group.

ISO/DIS 15614-7


8.3.2 Parent metal thickness

The range of qualification for the parent metal thickness is given in Table 4.

Table 4� Range of qualification for parent metal thickness

Thickness of the test piecet

Range of qualification for overlay a

t < 25 mm a 0,8 t to 1,5 t

t ≥ 25 mm a 25 mm to unlimited

t Parent metal thickness

a For laser beam welding, 12 mm instead of 25 mm.

8.3.3 Parent metal diameter

For welding on pipes with a diameter < 150 mm, the qualification shall be performed on a tube. The qualificationtest piece covers diameters > 0,75 times the test piece diameter.

8.4 Related to the filler metal

8.4.1 Filler metal designation

Filler materials cover other filler materials as long as they have equivalent mechanical properties, same type ofcoating, same nominal composition and hydrogen content in accordance with the designation in the appropriateEuropean standard for the filler material concerned.

8.4.2 Thickness of the deposit

For hardfacing, when the overlay is machined, the minimum thickness of the deposit shall be tested by hardnessmeasurement on the final machined surface (see 7.4.2).

For corrosion resistant overlay, an additional sampling for chemical analysis shall be performed, where needed, onthe final machined surface.

If the overlay is machined in production, the minimum qualified thickness is:

for hardfacing, the thickness tested in 7.4.2;

for corrosion resistant overlay, the thickness tested in 7.4.4.

ISO/DIS 15614-7


Key

1 As welded surface2 Prepared surface3 Chemistry samples4 Note 15 Note 26 Note 37 Approximate fusion line8 Original test piece thickness t

Figure 6� Chemical analysis specimen for corrosion/resistant surfacing, building-upand hard surfacing weld metal overlay

NOTE 1 When a chemical analysis is conducted on the as welded surface, the distance from the approximate fusion line tothe final as welded surface shall become the minimum qualified overlay thickness. The chemical analysis may be performeddirectly on the as welded surface or on chips of material taken from the as welded surface.NOTE 2 When a chemical analysis is conducted after material has been removed from the as welded surface, the distancefrom the approximate fusion line to the prepared surface shall become the minimum qualified overlay thickness. The chemicalanalysis may be made directly on the prepared surface or on chips of material taken from the prepared surface.NOTE 3 When a chemical analysis is conducted on material removed by a horizontal sample, the distance from theapproximate fusion line to the uppermost side of the drilled cavity shall become the minimum qualified overlay thickness. Thechemical analysis may be performed on chips of material removed from the drilled cavity.

8.5 Common to welding procedures

8.5.1 Welding process

The range of qualification is valid only for the welding process used in the welding procedure test.

The qualification given is restricted to the oscillation technique (if used) during the welding qualification test.

8.5.2 Welding position

The range of qualification is restricted to the welding position tested. However, welding position PC qualifieswelding positions PA and PB.

8.5.3 Type of current

The range of qualification is restricted to the type of current (AC, DC, pulsed current) and polarity used in thewelding procedure test.

ISO/DIS 15614-7


8.5.4 Heat input

The range of qualification is restricted, for all layers, to 25 % higher from the values achieved during the weldingprocedure qualification test.

8.5.5 Preheat temperature

When preheating is required, the following rule applies to each layer. The minimum temperature shall be thenominal temperature applied at the start of the welding procedure test.

8.5.6 Interpass temperature

The maximum interpass temperature shall be the maximum interpass temperature reached during the weldingprocedure test.

8.5.7 Post-weld heat-treatment

Deletion of post-weld heating (for hydrogen release) is not permitted.

Addition or deletion of post-weld heat treatment is not permitted.

The temperature range qualified is the holding temperature, minus 20 °C plus 40 °C, used for the weldingprocedure test unless otherwise specified. Where required for hardfacing, heating rates, cooling rates and holdingtime shall be related to the production assembly.

8.5.8 Number of layers

For corrosion resistant cladding, a single-layer deposit qualifies a multi-layer deposit provided that the weldingconditions are identical. A multi-layer deposit does not qualify a single-layer deposit.

For hardfacing, single-layer deposit qualifies only a single-layer deposit. A multi-layer deposit performed with Nlayers qualifies a multi-layer deposit performed up to N+4.

8.6 Specific to welding processes

8.6.1 Process 11

The qualification given is for the diameter of electrode used in the welding procedure test plus or minus oneelectrode diameter size for each run provided the requirement for heat input are satisfied.

8.6.2 Processes 12 and 72

The qualification is restricted to the wire/strip system used in the welding procedure tests (e.g. single-wire/strip ormultiple wire/strip-system).

The qualification given for the flux in combination with a grade of wire/strip is restricted to the make andclassification in accordance with the EN 760 used for the procedure welding test.

The qualification given is restricted to any supplementary device used during the welding procedure qualificationtest, e.g. control of the magnetic field acting on the weld pool when using strip electrodes or oscillation of theelectrodes.

The qualification is restricted to the wire diameter or strip size used in the welding procedure test.

8.6.3 Processes 131, 135 ,136, 137 and 141

The qualification given to the shielding gas is restricted to the type of gas in accordance with EN 439 used in thewelding procedure qualification test.

ISO/DIS 15614-7


The qualification given is restricted to the wire system used in the welding qualification test (e.g. single-wire ormultiple-wire system).

8.6.4 Process 15

In addition to 8.6.3, the additional requirements apply.

The qualification given is restricted to the filler metal form used in the welding procedure test.

The qualification given is restricted to the make, particle size and type of the powder used in the welding proceduretest.

The qualification given is restricted to the powder feed rate ± 10 % used in the welding procedure test.

The qualification given is restricted to the transfer mode used in the welding procedure test.

The qualification given is restricted to the torch orifice diameter used in the welding procedure test.

8.6.5 Process 15 (PTA plasma transferred arc)

For hardfacing only, the following requirements shall apply, in addition to 8.6.4.

The maximum thickness of the hard surfacing deposit shall be the thickness qualified.

The maximum particle size range is the qualified ± 20 %.

The qualification is restricted to the plasma gas used in the welding procedure test.

The qualification is restricted to the nominal composition of the powder-feeding gas (plasma arc spray) qualified inthe welding procedure test.

The qualification is restricted to the type and size of tungsten electrode used in the welding procedure test.

The qualification is restricted to distance torch-work piece qualified ± 10 %.

8.6.6 Process 311

For hardfacing only, the following requirements apply.

The qualification is restricted to fuel gas used in the welding procedure test.

The qualification is restricted to the maximum fuel gas pressure used in the welding procedure test.

The qualification is restricted to the torch type or tip size used in the welding procedure test.

8.6.7 Process 311 (Spray fuse method)

For hardfacing only, the following requirements shall apply, in addition to 8.6.6.

The maximum thickness of the deposit shall be the thickness qualified.

The maximum particle size range is the qualified ± 20 %.

The qualification is restricted to the spray-torch model or type and orifice size.

The qualification is restricted to the powder feed rate used in the welding procedure test.

The qualification is restricted to the feed gas composition used in the welding procedure test.

The qualification given is restricted to distance torch-work piece qualified ± 15 %.

ISO/DIS 15614-7


8.6.8 Process 52

Conditions for laser welding are defined in prEN ISO 15609-6.

9 Welding procedure qualification record (WPQR)

The welding procedure qualification record (WPQR) is a statement of the results of assessing each test pieceincluding re-tests. The relevant items listed for the WPS in prEN ISO 15609-1 shall be included, together withdetails of any features that would be rejectable by the requirements of clause 7. If no rejectable features orunacceptable test results are found, a WPQR detailing the welding procedure test piece results is qualified andshall be signed and dated by the examiner or examining body.

A WPQR format shall be used to record details for the welding procedure and the test results, in order to facilitateuniform presentation and assessment of the data.

An example of WPQR format is shown in Annex A.

ISO/DIS 15614-7


Annex A (informative)

Welding Procedure Qualification Record form (WPQR)

Welding procedure qualification - test certificate

Manufacturer's Welding procedure Examiner or examining bodyReference N° : Reference N° :

Manufacturer :

Address :

Code/Testing Standard :

Date of welding :

Extent of qualification (in accordance with ISO 15614-7, clause 9):

Welding process :

Joint type :

Parent metal(s) :

Metal thickness (mm) :

Outside diameter (mm) :

Filler metal type :

Shielding gas/flux :

Type of welding current/fuel gas :

Welding positions :

Preheat :

Post-weld heat treatment and/or ageing :

Other information :

Certified that test welds prepared, welded and tested satisfactorily in accordance with the requirements of thecode/testing standard indicated above.

Location Date of issue Examiner or examining body

Name, date and signature

ISO/DIS 15614-7


Annex A (continued)

Details of weld test

Location : Examiner or examining body :Manufacturer's welding procedureReference N° :WPQR N° : Method of preparation and

cleaning :Parent metal specification:

Manufacturer :Welder's name :Welding process : Material thickness (mm) :Joint type : Outside diameter (mm) :Weld preparation details (sketch)* : Welding position :

Joint design Welding sequences

Welding details

Run Process Size of fillermetal

CurrentA

VoltageV

Type ofcurrent/Polarity

Wire feedspeed

Travelspeed*

Heat input

Filler metal classification and trade name : Other information * :Any special baking or drying : weaving for manual welding

(max. width of run) :Gas flux : shielding Oscillation for automatic welding:

amplitude, frequency, dwell timeGas flow rate : - shielding Pulse welding details :- backing : Stand off distance :Tungsten electrodes type/size : Plasma welding details :Preheat temperature : Torch angle :Interpass temperature :Post-weld heat treatment and/or ageing :Time, temperature, method :Heating and cooling rates *:

Manufacturer Examiner or examining bodyName, date and signature Name, date and signature

* if required.

ISO/DIS 15614-7


Annex A (concluded)

Test results

Manufacturer's Welding procedure Examiner or examining bodyReference N° : Reference N° :

Visual testing : Radiographic testing :Penetrant/Magnetic particle testing* Ultrasonic testing :

Tensile tests Temperature :Type/N° Re

N/mm2Rm

N/mm2A % on Z

%Fracture location Remarks

Requirement

Bend tests Former diameter :Type/N° Bend angle Elongation* Result

Macro examination :Micro examination* :

Impact test* Type : Size : Requirement :Notch location /Direction Temp.

°CValues

1 2 3Average Remarks

Hardness tests* Location of measurements (sketch*)Type/loadParent metal :H.A.Z. :Weld metal :

Other tests* :

Remarks :

Tests carried out in accordance with the requirements of : Examiner or examining bodyLaboratory report reference N°Test results were acceptable/not acceptable (delete as appropriate)Tests carried out in the presence of : Name date and signature

* if required.

ISO/DIS 15614-7


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 requirements of EU Directive 97/23/EC.

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

The following clauses of this standard are likely to support requirements of Directive 97/23/EC.

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

Table ZA � Relation between this European standard and the Directive 97/23/EC

Clauses/Paragraphs of this Europeanstandard

Essential requirement of the Directive97/23/EC

Comments/Notes

All clauses Annexe I, 3.1.2 Permanent joining

ISO 15614_7

Documents

Transcript of ISO 15614_7