rules for the classification of ships, pt. 26, 2009

RULESFOR THE CLASSIFICATION OF

SHIPS

Part 26 - WELDING

2009

CROATIAN REGISTER OF SHIPPING

Hrvatska (Croatia) 21000 Split Marasovieva 67 P.O.B. 187Tel.: (...) 385 (0)21 40 81 11Fax.: (...) 385 (0)21 35 81 59

E-mail: [email protected] site: www.crs.hr

By the decision of the General Commitee to the Croatian Register of Shipping,

the Rules for the Classification of Ships,

PART 26 - WELDING

enteres into force on 1st January 2009

RULES FOR THE CLASSIFICATION OF SHIPSPART 26

REVIEW OF MODIFICATIONS AND ADDITIONS IN RELATION TO2002 EDITION

RULES FOR THE CLASSIFICATION OF SHIPSPart 26. - Welding

All major changes in respect to 2002 edition throughout the text are shaded.The grammatical and print errors, have been corrected throughout the subject chapter of the Rules and are

not subject to above indication of changes.


2009

The subject Rules include the requirements of the following international Organisations:

International Association of Classification Societies (IACS)

Unified Requirements (UR):W17(2005), W23(1997), W26(2005), W28(2005)

Unified Recommendations:No. 17(1987), No. 20(1988), No. 47(2008), No. 70(2006)

International Standard Organization (ISO):CEN ISO/TR 3834-6: 2007

European Norm (EN):EN ISO 14731: 2006

European Norm with status of Croatian Norm:HRN EN 287-1: 2004/+AC: 2007 +A2: 2007, HRN EN 439: 1999, HRN EN 875: 2001,HRN EN 876: 1999, HRN EN 895: 1999, HRN EN 910: 1999, HRN EN 970: 2000,HRN EN 1289: 2000/+A1: 2003+A2: 2008, HRN EN 1290: 2000/+A1: 2003 + A2: 2008,HRN EN 1291: 2000/+A1: 2003 + A2: 2008, HRN EN 1320: 1999, HRN EN 1321: 1999,HRN EN 1481: 1999, HRN EN 1435: 2000/+A1: 2003 + A2: 2008, HRN EN 1712:2000/+A1: 2003 + A2: 2008, HRN EN 1713: 2000/+A1: 2003 + A2: 2008, HRN EN1714: 2000/+A1: 2003 + A2: 2008, HRN EN ISO 3834-1: 2007, HRN EN ISO 3834-2:2007, HRN EN ISO 3834-3: 2007, HRN EN ISO 3834-4: 2007, HRN EN ISO 3834-5:2007, HRN EN ISO 4063: 2001, HRN EN ISO 5817: 2004, HRN EN ISO 6520-1: 2008,HRN EN ISO 6947: 1999, HRN EN ISO 9606-2: 2007, HRN EN ISO 10042: 2008/+corr. 1: 2008, HRN EN ISO 13920: 1999, HRN EN ISO 15607: 2004, HRI CEN ISO/TR15608: 2008, HRN EN ISO 15609-1: 2008, HRN EN ISO 15614-1: 2007, HRN EN ISO15614-2: 2007, HRN EN ISO 17562-1: 2004, HRN EN ISO 17562-2: 2004


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Contents:Page

1 GENERAL REQUIREMENTS, PROOF OF QUALIFICATIONS, APPROVALS ......................................... 11.1 GENERAL REQUIREMENTS .....................................................................................................................................................11.2 REQUIREMENTS FOR APPROVAL OF WELDING SHOPS AND SHIPYARDS FOR PERFORMING OF WELDING

WORKS.........................................................................................................................................................................................21.3 WELDER'S QUALIFICATION TESTS .......................................................................................................................................41.4 WELDING PROCEDURE TESTS .............................................................................................................................................191.5 WELDING CONSUMABLES ....................................................................................................................................................301.6 OVERWELDABLE SHOP PRIMERS........................................................................................................................................49

2 FABRICATION AND INSPECTION OF WELDED JOINTS ......................................................................... 512.1 FABRICATION OF WELDED JOINTS.....................................................................................................................................512.2 HEAT TREATMENT..................................................................................................................................................................522.3 NON-DESTRUCTIVE TESTING OF WELDS ..........................................................................................................................542.4 MECHANICAL AND TECHNOLOGICAL TESTS ..................................................................................................................59

3 WELDING IN THE VARIOUS FIELDS OF APPLICATION......................................................................... 643.1 WELDING OF HULL STRUCTURES.......................................................................................................................................643.2 WELDING OF STEAM BOILERS AND PRESSURE VESSELS.............................................................................................693.3 WELDING OF PIPELINES ........................................................................................................................................................703.4 WELDING OF MACHINERY COMPONENTS........................................................................................................................70

APPENDIX I............................................................................................................................................................................................73APPENDIX II ..........................................................................................................................................................................................75

RULES FOR THE CLASSIFICATION OF SHIPS 1PART 26

2009

1 GENERAL REQUIREMENTS,PROOF OF QUALIFICATIONS,

APPROVALS

1.1 GENERAL REQUIREMENTS

1.1.1 General

1.1.1.1 The present Part of the Rules (hereinafter Rules)applies to all welding operations performed in the course ofnew constructions, conversion or repair:

1. ship hull, superstructure, deck houses;2. equipment and gear;3. machinery and machinery installation;4. steam boilers and pressure vessels;5. piping;when they are subject to the technical supervi-

sion by the CROATIAN REGISTER OF SHIPPING(hereinafter referred to as: the Register).Note:

The terms "welding", "welding work", welding process"etc. used in these Rules also cover all other thermaland/or mechanized joining processes such as brazingwhich, because they are deemed as "special processes"under the terms of the quality assurance standards, re-quire pre-qualification which has to be carried out byqualified personnel and constantly monitored. These Rulesshall be applied in an analogous manner to these proc-esses. The nature and scope of the quality assurancemeasures required will be specified by the Register on acase-by-case basis.

1.1.1.2 The present Part of the Rules applies to allwelding works on machinery, installations and equipment forwhich the Register has issued the Rules, guidelines or othertechnical directions where reference is made to this Rules.

1.1.1.3 The present Part of the Rules shall be appliedanalogously where other Rules, guidelines or directions issuedby the Register contain no special instructions with regard towelding works.

1.1.1.4 The present Part of the Rules may be appliedanalogously to other welding works, other than those referredto in 1.1.1, if they are subject to the supervision of theRegister. Where necessary, these cases shall be considered bythe Register in each particular case.

1.1.1.5 Exceptions to the present Part of the Rules shallbe agreed with the Register in each particular case.

1.1.1.6 The Register reserves the right to make amend-ments of the present Part of the Rules, should this prove nec-essary on the basis of more recent knowledge or operating ex-perience.

1.1.2 Other Rules, Standards andSpecifications

1.1.2.1 The Standards and Instructions mentioned in thefollowing Chapters of this Part of the Rules form an integral

part of it. The same applies to the working documents (e.g.drawings, welding specifications etc.) approved by the Regis-ter.

1.1.2.2 The application of other Rules, standards, guide-lines or other technical instructions shall be agreed with theRegister in each particular case.

1.1.2.3 If there are differences in requirements betweenthis Part of the Rules and the other relevant standards orspecifications, the requirements of this Part of the Rules shallbe applied, unless otherwise agreed.

1.1.3 Technical documentation

1.1.3.1 Technical documentation for welding whichshall be submitted to the Register for approval, prior to com-mencement of fabrication, shall contain all necessary detailsfor the preparation, execution and where applicable, the in-spection of the welds.

This information shall, as a rule, cover the fol-lowing:

base materials, shapes and dimensions ofproducts;

welding process and welding consumables; shapes and dimensions of welds; preheating and heat input during welding; heat treatment after welding; subsequent treatment of the welds; methods and scope of inspection; requirements applicable to the welded joints (e.g. quality, evaluation category and simi-

lar)

1.1.3.2 When during the manufacture of ships struc-tures, materials, welding processes, welding consumables,shapes and dimensions of welds, comply with the normalshipbuilding practice the details referred to in 1.1.3.1. need notbe particularly specified.

1.1.3.3 For particular structures (e.g. liquefied gastanks), materials (e.g. high strength structural steels and cladplates), or welding processes, the following additional infor-mation and documentation shall be provided:

weld preparation, assembly and auxiliary(tack) welds;

welding positions, welding sequence(sketches);

weld build-up (build-up of joint) number ofpasses;

heat input during welding (heat input perunit of weld length)

1.1.4 Materials, Weldability

1.1.4.1 All materials shall be chosen in accordance withthe intended application and conditions of service and shallcomply with the Rules, Part 25 - Metallic Materials. Theirproperties shall be documented to the specified extent by testcertificates (e.g. in compliance with HRN EN 10204).

1.1.4.2 If according to 1.1.4.1., materials to be weldedand their properties are not specified in the Rules, Part 25 -Metallic Materials, the welding shop shall prove theirweldability (e.g. with respect to existing standards) or shall

2 RULES FOR THE CLASSIFICATION OF SHIPSPART 26

2009

submit the material specifications for approval. Where there isany doubt to the weldability of material, the welding shopshall specially demonstrate it in the welding procedure tests.

1.1.4.3 The welding shop shall ensure that only materi-als referred to in 1.1.4.1. and 1.1.4.2 are used and shall pro-vide proof thereof at the Surveyors request.

1.1.5 Welding Consumables

1.1.5.1 Welding consumables shall enable a weldedjoint to be appropriate to the base material and service condi-tions. They shall be tested in compliance with the chapter 1.5and shall be approved for the respective application. This pro-vision applies in analogous manner to brazing materials.

1.1.5.2 Approval shall be given, as a rule, by the Regis-ter. When, in special cases, e.g. repairs, no welding consum-ables are approved by the Register, welding consumables ap-proved by the other recognized testing bodies may be used inagreement with the Register.

1.1.5.3 The welding shop supervisor shall ensure thatonly tested welding consumables approved by the Register areused and at the Surveyors request the proof thereof shall beprovided.

1.1.6 Quality Assurance, Responsibility

1.1.6.1 The welding shop is responsible for ensuringthat the manufacturing conditions and quality comply to thoseat the time of approval as well as to the requirements of theRules and, where applicable, that the conditions stated in ap-provals and supplementary Rules shall be complied with. Theshop shall also ensure through regular inspections and teststhat the required quality is achieved. The responsibilities ofthe welding supervisors are also covered in EN ISO 14731.The tests carried out by a Surveyor to the Register shall notrelieve the welding shop from this responsibility.

The range and extent of the quality inspectionsrequired is determined by the structure in question.

1.1.6.2 When the delivery is carried out by subcontrac-tors, the welding shop shall be responsible for ensuring thatthe conditions of the present part of the Rules are compliedwith by the subcontractors.

1.1.6.3 If alterations of the approved documentation ordeviations from approved manufacture procedure becomenecessary, the welding shop shall apply for the Surveyors con-sent thereto. The Surveyor shall notify any alterations duringfabrication.

1.1.6.4 The materials shall be marked in such a way thatthey can be identified and matched up with the test certificateduring and after manufacture.

1.1.6.5 If the marking is likely to be erased duringmanufacture, the welding shop shall promptly transfer themark to another part of the product.

1.1.6.6 In the manufacture of steam boilers and pressurevessels, each weld joint shall be marked with the welderssymbol. This requirement may be dispensed with if the weld-ing shop supervisory staff keep a record of the welders nameswho execute the individual weld joint.

1.1.7 Inspection, liability

1.1.7.1 The welding shop is liable to present all compo-nents of the required intermediate and final inspections to theSurveyor. All welded joint shall be easily accessible for in-spection. Welded joints shall not be tested with coatings orprotected so as to make it difficult or impossible to inspect theweld in concern.

1.1.7.2 All the manufacturers records and documentsregarding the quality assurance shall be submitted to the Reg-ister for inspection.

These shall cover in particular: drawings and other working documents; material test certificates; welders and welding procedure test certifi-

cates; test reports and relevant documents (radio-

graphs, ultrasonographs) of non-destructivetests;

certificates on hot-forming and heat treat-ment (where applicable);

production test results, intermediate results(if necessary).

1.1.7.3 The Register shall give no guarantees thatwelded structures or components tested by its surveyor fullycomply with the requirements and that their manufacture hasbeen performed correctly and in accordance with the testedprocedure. Products which prove defective in service or in op-eration may be rejected even if an earlier inspection was satis-factory, if the defect or deficiency cannot be rectified.

1.2 REQUIREMENTS FOR APPROVALOF WELDING SHOPS AND SHIPYARDS

FOR PERFORMING OF WELDINGWORKS

1.2.1 Approval

1.2.1.1 Shipyards and welding shops including theirbranches and subcontractors (hereinafter organizations) whichperform welding works on structures referred to in 1.1.1., shallbe approved for these works by the Register.

The preconditions for this approval are that theorganization satisfy the requirements stated in 1.2.2, that theyare inspected by the Register in accordance with 1.2.3 and,where necessary, that the welding procedure tests are carriedout in accordance with 1.2.4.

Any approval in accordance with 1.2.1.1 coversthe most essential welding quality requirements in accordancewith the standards HRN EN ISO 3834. For certification underthe terms of these standards, the requirements set out in 1.2.2and 1.2.3 must be also met. These additional requirementsshall be regarded as having been met when the organizationhas in place a certified quality assurance system in accordancewith standard HRN EN ISO 9001.

In special cases, a welding shop may be ap-proved for performing welding works within the restrictedarea of activity, under the special procedure, previously ap-proved by the Register.


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1.2.1.2 The application for approval shall be submittedin writing to the Register. The application shall contain thefollowing data relating to the approval:

nature and structure of components; categories and dimensions of the materials

used; welding procedures and positions; heat treatments (where necessary); pressure vessel class (for boilers and pres-

sure vessels).

1.2.1.3 If a certificate of compliance with the weldingquality requirements stipulated in HRN EN ISO 3834-2, -3 or-4 is required over and above approval in accordance withthese Rules, this must be expressly noted in the application forapproval.

1.2.1.4 Application for approval (the form is specifiedin Appendix I of the present Rules) submitted to the Registershall contain the following documentation:

a description of organization (the form isspecified in Appendix II of the presentRules);

copies of the qualification documents of thewelding supervisors;

copies of the welders certificate or the list ofthe qualified welders (testing standard, test-ing body, date of testing, test category, dateof the last re-test) signed by a Surveyor.

copies of the welding procedure certificates.1.2.1.5 For certification in accordance with 1.2.1.3, in-formation and documents relating to the elements specified inAppendix I to HRN EN ISO 3834-1 for the respective grade ofrequirement (HRN EN ISO 3834-2 = comprehensive, -3 =standard, or -4 = elementary quality requirements) must bealso enclosed with the application for approval (e.g. in theform of relevant procedure instructions):

- contract review- design review- treatment of subcontractors- equipment maintenance- quality inspections- non conformances- calibration- identification- traceabilityIf the organization operates a certified quality

system comforming to the standard HRN EN ISO 9001, theQuality Manual (and if specified in Appendix I to HRN ENISO 3834-1) documentation relating to the quality assurancemeasures performed (quality reports) must be submitted to theRegister for inspection in place (of the above information anddocuments).

1.2.1.6 An approval granted according to these Rules orcertification in accordance with HRN EN ISO 3834 shall bevalid for three (3) years. If the welding works are constantlyperformed under the supervision of the Register, the validitymay be extended, at request of the organization, for next threeyears, without subsequent examination.

When welding works are being performed with-out the Register's supervision for more than one year, the va-lidity of the Approval Certificate may be extended for a period

of three years, after the repeated supervision of the organiza-tion.

1.2.1.7 If the conditions under which the approval wasgranted, changed (e.g. the use of unqualified welding proce-dures, materials and/or welding consumables, or if the organi-zation supervisory staff has changed), the organization shallduly notify the Register.

If the organization does not stick to the condi-tions under which the approval was granted to it, the approvalshall cease to be valid. Also in case that serious defects aredetected, the Register may carry out interim inspection and ifnecessary, may withdraw the approval.

1.2.2 Requirements1.2.2.1 Organization shall have at its disposal suitableworkshops, equipment and machinery to the extent necessaryfor proper performance of welding works. This includes, forexample, suitable storage facilities and baking equipment forthe welding consumables, preheating and heat treatmentequipment and means for weather protection of welding workin the open air. Equipment and facilities which do not belongto the organization may be taken into account when evaluatingthe capabilities of the organization provided that the condi-tions necessary for the proper manufacture are complied withand that such equipment is available without restrictions

1.2.2.2 Organization shall have at least one fully quali-fied welding supervisor who is responsible for ensuring of per-forming quality welding works.

Welding supervisor shall have experience ap-propriate to the scope of the manufacture works and shall pro-vide necessary documentary proof to the Register.

With respect to the nature and work extent, thefollowing persons shall be appointed as welding supervisors:

welding engineers*; for fabrication of im-portant components of the hull structure andof offshore installations, also of handlingequipment, steam boilers, pressure vessels,pressure lines and engine and transmissioncomponents,

welding technicians** for fabrication ofsimpler or less heavily stressed components.

For information relating to the qualification ofthe welding supervising staff, their tasks and responsibilities,see EN ISO 14731.

The welding supervisor shall be permanentlyemployed with the organization. Supervisions on the weldingworks by outside staff is not acceptable.

-------------------------* welding engineers (IWE, IWT, IWS) in the recommenda-

tions of the International Institute of Welding (IIW) /European Welding Federation (EWF) or engineers with onequivalent level of knowledge.

** welding technicians (IWT, IWS) as defined in the recom-mendations of the International Institute of Welding (IIW)/ European Welding Federation (EWF) or, if necessary,other persons with suitable knowledge.

1.2.2.3 Organization shall be staffed with qualifiedwelders and for automatic welding with adequately trainedoperators. The required number of qualified welders shall bedetermined by the size of organization and the scope of


2009

welding works performed under supervision of the Register.However, a minimum of two qualified welders are required,for each welding process. Welders for manual and semi-automatic welding shall be tested in accordance with theChapter 1.3.

The welding of a test piece in a successfullycompleted welding procedure may be taken as a proof ofmanual skill for testing of welder qualification.

Operators of fully mechanised or automaticwelding equipment shall be trained in the use of the equipmentand be capable of setting and operating the equipment in sucha way that the required weld quality is achieved. The qualifi-cation of the operators must be demonstrated in accordancewith HRN EN 1418/ISO 14732, on welded test pieces, e.g. inwelding procedure or fabrication test.

1.2.3 Inspection

1.2.3.1 Before starting the manufacture, a Surveyorshall inspect organization in compliance with the requirementsof 1.2.2.

1.2.3.2 The inspection of organization shall include alldocumentation necessary for evaluation of quality assurancewhich shall be submitted to a Surveyor. These especially in-clude the welding supervisors qualification documents, weld-ers certificates, reports on previous welding procedure tests aswell as the results of the previous tests of welded joints.

For certification according to HRN EN ISO3834, compliance with the additional quality requirementsstated in the standards shall be demonstrated to the Surveyor.

1.2.3.3 Inspection procedure, reporting and decision ofissuance Approval Certificate is in accordance with Part 4,Rules for Classification of Ships.

1.2.4 Welding Procedure Tests

1.2.4.1 If welding procedure tests are required they shallbe carried out before the approval of organization or extensionof the approval validity. Requirements for the performance ofthese tests and requirements applicable to test results are givenin Chapter 1.4 Welding procedure tests shall be performed insuch a way that the conditions of manufacture are coveredwith regard to materials, welding procedures, welding con-sumables, wall thickness, shapes of welds and heat treatment.The properties of base material for test piece shall be docu-mented by test certificate.

1.2.4.2 In general, a welding procedure test is valid onlywithin the tolerances specified in the Approval Certificate andshall not be transferable from the organization where it hasbeen performed to another organization. The Register maypermit the exemption in case of a branch organization which isunder the constant supervision of the main organization wherethe manufacture conditions are the same as well as the weld-ing processes used. Welding procedure tests performed in theworkshop are not valid at the same time for welding in thefield. In such cases the welding procedure test shall be re-peated in a whole or partly under field conditions as deter-mined by the Register. The Register may desist from the re-peated tests if the properties of the field welds are documentedby the production tests.

1.2.4.3 Welding procedure tests performed under thesupervision of other testing bodies may be accepted by theRegister in a whole or partly at the organization request if theyare acceptable on the basis of test results. In such cases, thecomplete test reports as well as the Approval Certificate issuedby other testing body shall be submitted to the Register forevaluation.

1.2.5 Certificate on Approval; Certificate ac-cording to HRN EN ISO 3834

The Register shall issue Certificate on Approvalfor the organization to carry out welding works, provided therelevant requirements are satisfied in the tests. The Certificateson Approval shall be valid within the limits specified in theCertificates. Where proof has been furnished that the addi-tional requirements listed in 1.2.1.5 according to HRN ENISO 3834 have been met, the Register issued a certificatebased on this in accordance with this standard.

If the previously issued Certificate on Approvalhas been replaced or amended, the data specified in the morerecent Certificate shall be taken as valid. This applies speciallyto the range of application, e.g. for a specific welding proc-esses.

1.3 WELDER'S QUALIFICATIONTESTS

1.3.1 General

1.3.1.1 Welders qualification tests performed on struc-tures referred to in 1.1.1 shall be carried out under supervisionof the Register in compliance with the requirements of thisChapter.

The requirements of this Chapter, relating tobase material, apply to steel materials (HRN EN 287-1) andaluminium materials (HRN EN ISO 9606-2). For other non-ferrous materials, the corresponding parts of HRN EN ISO9606, may be apply.

1.3.1.2 The requirements of this Chapter apply to thefollowing welding processes (reference numbers of weldingprocesses for symbolic representation are listed in HRN ENISO 4063):

111 manual metal arc welding;114 self-shielded tubular-cored arc welding;121 submerged arc welding with one wire

electrode;125 submerged arc welding with tubular cored

electrode;131 metal inert gas welding (MIG);135 metal active gas welding (MAG);136 tubular cored metal-arc welding with ac-

tive gas shield;137 flux cored metal arc welding with inert

shield gas;141 tungsten inert gas arc welding (TIG);15 plasma arc welding;311 oxy-acetylene welding.The welders test certificate and welding proce-

dures other than those referred to in 1.3.1.2 shall be consideredby the Register in each particular case.


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1.3.2 Symbols and Abbreviations

Instead of using the full wording in the TestCertificate of a welder, the following symbols and abbrevia-tions shall be used:

a) test piece:a - nominal throat thickness;BW- butt weldD - outside diameter of pipeFW- fillet weldP - platet - plate or pipe wall thicknessT - pipez - leg length of fillet weld

b) Consumables (including auxiliaries, e.g.shielding gas, flux)nm - no filler metalwm- with filler metalA - acid coveringB - basic covering or electrode core

basicM - electrode core-metal powderP - electrode core-rutile, fast freezing

slagC - cellulosic coveringR - rutile covering or electrode core-

rutile slow freezing slagRA - rutile-acid coveringRB - rutile-basic coveringRC - rutile-cellulose coveringRR - rutile covering (thick)S - solid wire/rodV - electrode core rutile or basic / fluo-

rideW - electrode core-basic/fluoride, slow

freezing slagY - electrode core-basic/fluoride, fast

freezing slagZ - electrode core-other types

c) Miscellaneousbs - both-side weldinglw - left ward weldingmb - welding with backing materialml - multi layernb - welding without backingrw - right ward weldingsl - single layerss - single-side welding

1.3.3 Essential variables and range of qualifi-cation

1.3.3.1 The qualification of welders is based on essen-tial variables:

- welding processes- product type (plate (P) and pipe (T))- type of weld (butt (BW) and fillet (FW))- base material group- welding consumable- dimension (material thickness and outside

pipe diameter)- welding positions- weld details (backing, single side welding,

both side welding, single layer, multilayer, left ward welding, right ward weld-ing).

For each essential variable a range of qualifica-tion is defined.

1.3.3.2 Welding processes

Welding processes are defined in 1.3.1.2. Eachqualification test normally qualifies only one welding process.

Exceptions are the changes of solid wire S(welding process 135) to metal core wire M (welding process136 or vice versa which do not require a new qualification test(see Table 1.3.3.6.1). However, it is permitted for a welder tobe qualified for two or more welding processes by welding asingle test piece (multi processes joint) or by two or moreseparate qualification test. The range of qualification for eachwelding process used and for the multi process joint for buttwelds are given in Table 1.3.3.2.

1.3.3.3 Product type

The qualification test shall be carried out onplate or pipe. The following criteria are applicable:

a) Welds in pipes, outside diameter D > 25mm, cover welds in plates.

b) Welds in plates cover welds in pipes:- of outside pipe diameter D 150 mm,

for welding positions PA, PB and PC- welding position PE for plates covers

outside pipe diameter D 500 mm inpositions PF


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Table 1.3.3.2

Thickness rangeWelding process used for the test piece

Single process joint Multi process joint

Key:1 Welding process 12 Welding process 2

according to Table 1.3.3.6.1for welding process 1:

t = s1for welding process 2:

t = s2

according to Table 1.3.3.6.1with t = s1 + s2

Key:2 Welding process 23 Welding with backing (mb)4 Welding without backing (nb)

Key:1 Welding process 1

according to Table 1.3.3.6.1for welding process 1:

t = t1for welding process 2:

t = t2

according to Table 1.3.3.6.1with t = t1 + t2

Welding process 1 only forwelding of the root area

1.3.3.4 Type of weld

The qualification shall be carried out as butt orfillet weld. The following criteria are applicable:

a) butt welds cover butt welds in any type ofjoint except branch connections (see and1.3.3.4 c);

b) in case where the majority of work is fil-let welding, the welder shall also bequalified by an appropriate fillet weldingtest, in cases where the majority of workis butt welding, butt welds qualify filletwelds;

c) butt welds in pipes without backing qual-ify branch connections with angle 60o.For a branch weld the range of qualifica-tion is based on the outside pipe diameterin branch.

d) for applications where the type of weldcannot be qualified by means of either abutt or fillet weld then a specific testpiece should be used to qualify thewelder, e.g. branch connection.

1.3.3.5 Parent material groups

1.3.3.5.1 SteelIn order to reduce the number of qualification

tests steel materials with similar welding characteristics aregrouped in 11 material group (see Table 1.3.3.5.1).


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Table 1.3.3.5.1

Group Sub-group Type of steel

Steels with a specified minimum yield strength ReH 460 N/mm 2a and with analysis in %C 0,25Si 0,60Mn 1,8Mo 0,70b

S 0,045P 0,045Cu 0,40b

1 Ni 0,5b

Cr 0,3 (0,4 for castings)b

Nb 0,06V 0,1b

Ti 0,051.1 Steels with a specified minimum yield strength ReH 275N/mm2

1.2 Steels with a specified minimum yield strength 275N/mm2 < ReH 360 N/mm2

1.3 Normalized fine grain steels with a specified minimum yield strength ReH 360 N/mm2

1.4 Steels with improved atmospheric corrosion resistance whose analysis may exceed the requirements forthe individual elements as indicated in group 1Thermomechanically treated fine-grain steels and cast steels with a specified minimum yield strengthReH > 360 N/mm2

2 2.1 Thermomechanically treated fine-grain steels and cast steels with a specified minimum yield strength360 N/mm2 < ReH 460 N/mm2

2.2 Thermomechanically treated fine-grain steels and cast steels with a specified minimum yield strengthReH > 460 N/mm2

Quenched and tempered and precipitation-hardened fine-grain steels except stainless steels with a speci-fied minimum yield strength ReH > 360 N/mm2

3.1 Quenched and tempered and precipitation-hardened fine-grain steels except stainless steels with a speci-fied minimum yield strength 360 N/mm2 < ReH 690 N/mm2

3.2 Quenched and tempered and precipitation-hardened fine-grain steels except stainless steels with a speci-fied minimum yield strength ReH > 690 N/mm2

3

3.3 Precipitation-hardened fine-grain steels except stainless steelsLow vanadium alloyed Cr-Mo (Ni) steels with Mo 0,7% and V 0,1%

4.1 Steels with Cr 0,3% and Ni 0,7%44.2 Steels with Cr 0,7% and Ni 1,5%

Cr-Mo steels free of vanadium with C 0,35%5.1 Steels with 0,75% Cr 1,5% and Mo 0,7%5.2 Steels with 1,5% < Cr 3,5% and 0,7% < Mo 0,7%5.3 Steels with 3,5% < Cr 7,0% and 0,4% < Mo 0,7%

5

5.4 Steels with 7,0% < Cr 10,0% and 0,7% < Mo 1,2%High vanadium alloyed Cr-Mo (Ni) steels

6.1 Steels with 0,3% Cr 0,75%, Mo 0,7% and V 0,35%6.2 Steels with 0,75% < Cr 3,5%, 0,7% < Mo 1,2% and V 0,35%6.3 Steels with 3,5% < Cr 7,0%, Mo 0,7% and 045% V 0,55%

6

6.4 Steels with 7,0% < Cr 12,5%, 0,7% < Mo 1,2% and V 0,35%Ferritic, martensitic or precipitation-hardened stainless steels with C 0,35% and 10,5% Cr 30%

7.1 Ferritic stainless steels7.2 Martensitic stainless steels

7

7.3 Precipitation-hardened stainless steels


2009

Table 1.3.3.5.1-continuous

Group Sub-group Type of steel

Austenitic stainless steels Ni 31%8.1 Austenitic stainless steels with Cr 19%8.2 Austenitic stainless steels with Cr > 19%

8

8.3 Manganese austenitic stainless steels with 4% Mo 12%Nickel alloy steels with Ni 10,0%

9.1 Nickel alloy steels with Ni 3,0%9.2 Nickel alloy steels with 3,0% < Ni 8,0%

9

9.3 Nickel alloy steels with 8,0% < Ni 10,0%Austenitic ferritic stainless steels (duplex)

10.1 Austenitic ferritic stainless steels with Cr 24%1010.2 Austenitic ferritic stainless steels with Cr > 24%

Steels covered by group 1c except 0,25% < C 0,85%11.1 Steels as indicated in group 11 with 0,25% < C 0,35%11.2 Steels as indicated in group 11 with 0,35% < C 0,5%

11

11.3 Steels as indicated in group 11 s 0,5% < C 0,85%Note:Based on the actual product analysis, group 2 steels may be considered as group 1.a In accordance with specification of the steel product standards ReH may be replaced by Rp0,2 or Rt0,5.b A higher value is accepted provided that Cr + Mo + Ni + Cu + V 0,75%.c A higher value is accepted provided that Cr + Mo + Ni + Cu + V 1%.

1.3.3.5.2 Range of qualification for parent metal groups-steel

The welding of any one metal in material groupconfers qualification on the welder for the welding of all

other metal within the same material group as well as othermaterial groups according Table 1.3.3.5.2.

Table 1.3.3.5.2

Range of qualification9 10 11

Materialgroupa of the

test piece1.11.21.4

1.3 2 3 4 5 6 7 8

9.1 9.2+9.3

1.1, 1.2, 1.4 X - - - - - - - - - - - -1.3 X X X X - - - - - X - - X2 X X X X - - - - - X - - X3 X X X X - - - - - X - - X4 X X X X X X X X - X - - X5 X X X X X X X X - X - - X6 X X X X X X X X - X - - X7 X X X X X X X X - X - - X8 - - - - - - - - X - X X -

9.1 X X X X - - - - - X - - X9

9.2+9.3 X - - - - - - - - - X - -10 - - - - - - - - X - X X -11 X X - - - - - - - - - - X

a Material group according to HRI CEN ISO/TR 15608.Note:X indicates those material groups for which the welder is qualified.- indicates those material groups for which the welder is not qualified.


2009

1.3.3.5.3 Aluminium and aluminium alloyIn order to reduce the number or qualification

tests, aluminium and aluminium alloy with similar welding

characteristics are grouped in 6 material group (see Table1.3.3.5.3).

Table 1.3.3.5.3

Group Sub-group Type of aluminium or aluminium alloy

21 Pure aluminium with 1% impurities or alloy contentNon-heat treatable alloys

22.1 Aluminium-manganese alloy22.2 Aluminium-manganesium alloy Mg 1,5%22.3 Aluminium-manganesium alloy 1,5% < Mg 3,5%

22

22.4 Aluminium-manganesium alloy Mg > 3,5%Heat-treatable alloys

23.1 Aluminium-manganesium-silicon alloys2323.2 Aluminium-zinc magnesium alloys

Aluminium-silicon alloys with Cu 1%24.1 Aluminium-silicon alloys with Cu 1% and 5% < Si 15%2424.2 Aluminium-silicon-magnesium alloys with Cu 1%; 5% < Si 15% and 0,1% < Mg 0,80%

25 Aluminium-silicon-copper alloys with 5% < Si 14%; 1% < Cu 5% and Mg 0,8%26 Aluminium-copper alloys with 2% < Cu 6%

Note:Groups 21 to 23 are generally for wrought materials and groups 24 to 26 are generally for cast materials.

1.3.3.5.4 Range of qualification for parent materialgroups-aluminium and aluminium alloy.

The welding of any one metal in materialgroup confers qualification on the welder for the welding ofall other metal within the same material group as well asother material groups according Table 1.3.3.5.4.

Table 1.3.3.5.4

Range of qualificationMaterial groupaof the test piece 21 22 23 24 25 26

21 X X - - - -

22 X X - - - -

23 X X Xb - - -

24 - - - X X -

25 - - - X X -

26 - - - X X Xa Material group according to HRI CEN ISO TR 15608b Qualifying with AlMg alloy of welding consumable qualified AlSi alloy but not vice

versaNote:X indicates those material groups for which the welder is qualified.- indicates those material groups for which the welder is not qualified.


2009

1.3.3.6 Welding consumables

1.3.3.6.1 SteelThe range of qualifications for welding con-

sumables are given in Table 1.3.3.6.1. Qualification with

filler material, e.g. with welding processes 141, 15 and 311,qualifies for welding without filler metal but not vice versa.

Table 1.3.3.6.1

Range of qualificationWeldingprocess

Welding consumablesused in the testb A, RA, RB, RC, RR, R B C

A, RA, RB, RC, RR, R x - -B x x -111C - - x

- - solid wire(S)electrode core

(M)electrode core

(B)electrode core

(R, P, V, W, Y, Z)solid wire (S) X X - -131

135136141

electrode core (M) X X - -

136 electrode core (B) - - X X114136

electrode core(R, P, V, W, Y, Z) - - - X

a The type of welding consumables used in the qualification test of welders for root run welding without back-ing (ss nb) is the type of welding consumables qualified for root run welding in production.

Note:X indicates those welding consumables for which the welder is qualified.- indicates those welding consumables for which the welder is not qualified.

1.3.3.6.2 Aluminium and aluminium alloys

Qualification with filler material e.g. withwelding processes 141 and 15, qualifies for welding withoutfiller metal but not vice versa.

Qualification with filler material of AlMg alloy,qualified filler metal of AlSi alloy but not vice versa.

For welding process 131, increasing of heliumcontent in shielding gas more than 50%, requires new qualifi-cation.

1.3.3.7 Dimensions

1.3.3.7.1 SteelRange of qualifications of butt welds for mate-

rial thickness of plate and pipe, and outside pipe diameter, aregiven in Tables 1.3.3.7.1-a and 1.3.3.7.1-b.

Table 1.3.3.7.1-a

Thicknessat

Range of qualificationmm

t < 3 t to 2 x tb

3 t 12 3 to 2 x tc

t > 12 5a Full multi processes s1 and s2 of Table 1.3.3.2 apply:b For oxy acetilene welding (311): t to t 1,5 x tc For oxy acetilene welding (311): 3 mm to 1,5 t

Table 1.3.3.7.1-b

Outside pipe diameter of testpiece

D


D 25 D to 2 x DD > 25 0,5 x D (25 mm min.)

a For structural hollow section, D is the dimension of thesmaller side.

For fillet welds, range of qualifications, forthickness of materials are given in Table 1.3.3.7.1-c.

Table 1.3.3.7.1-c

Material thicknessof test piece

t


t < 3 t to 3t 3 3

a See also Table 1.3.3.9.1.

1.3.3.7.2 Aluminium and aluminium alloysRange of qualifications of butt welds for mate-

rial thickness of plate and pipe, and outside pipe diameter aregiven in Tables 1.3.3.7.2-a and 1.3.3.7.2-b.


2009

Table 1.3.3.7.2-a


t


t 6 0,5 t do 2 tt > 6 6

Table 1.3.3.7.2-b

Outside pipe diameter oftest piecea

D


D 25 D to 2 x DD > 25 0,5 x D (25 mm min.)

a For structural hollow sections, D is the dimension of thesmaller side.

For fillet welds, range of qualifications, forthickness materials are given in Table 1.3.3.7.2-c.

Table 1.3.3.7.2-c


t


t < 3 t to 3t 3 3

a See also Table 1.3.3.9.1.

1.3.3.8 Welding positions

1.3.3.8.1 Welding positions for plates and pipes aregiven in Figures 1.3.3.8.1-a and 1.3.3.8.1-b (in accordancewith HRN EN ISO 6947). The positions and angles used inapproval test shall be bused on the same tolerances as used inproductions.


2009

PA Flat PC Horizontal

PG Vertical downwards PE Overhead PF Vertical upwardsa) Butt welds

PA Flat PB Horizontal

PG Vertical downwards PD Horizontal overhead PF Vertical upwardsb) Fillet welds

Figure 1.3.3.8.1-aWelding positions for plates


2009

PAPipe: rotatingAxis: horizontalWeld flat

PFPipe: fixedAxis: horizontalWeld: vertical upwards

PG Pipe: fixedAxis: horizontalWeld: vertical downwards

PCPipe: fixedAxis: verticalWeld: horizontal-vertical

J-L045Pipe: fixedAxis: inclinedWeld: vertical downwards

H-L045Pipe: fixedAxis: inclinedWeld: upward

a) Butt welds

PAPipe: rotatingAxis: inclinedWeld: flat

PBPipe: rotatingAxis: horizontalWeld: horizontal-vertical

PGPipe: fixedAxis: horizontalWeld: vertical downwards

PBPipe: fixedAxis: verticalWeld: horizontal-vertical

PFPipe: fixedAxis: horizontalWeld: vertical upwards

PDPipe: fixedAxis: verticalWeld: horizontal overhead

b) Fillet welds

Figure 1.3.3.8.1-bWelding positions for pipes


2009

1.3.3.8.2 Range of qualification for welding positions isgiven in Table 1.3.3.8.2.

Table 1.3.3.8.2

Range of qualificationWeldingposition oftest piece PA PB

a PC PDa PE PF(Plate)

PF(Pipe)

PG(Plate)

PG(Pipe)

H-L045 J-L045

PA x x - - - - - - - - -PBa x x - - - - - - - - -PC x x x - - - - - - - -PDa x x x x x x - - - - -PE x x x x x x - - - - -PF (Plate) x x - - - x - - - - -PF (Pipe) x x - x x x x - - - -PG (Plate) - - - - - - - x - - -PG (Pipe) x x - x x - - x x - -H-L045 x x x x x x x - - x -J-L045 xa Welding position PB and PD are only used for fillet welds and can only qualify fillet welds in other welding positions.Note:x Indicates those welding positions for which the welder is qualified- Indicates those welding positions for which the welder is not qualified

1.3.3.9 Weld details

Depending on the weld details, the ranges ofqualification are given in Tables 1.3.3.9.1 and 1.3.3.9.2.

When welding with process 311 a change ofwelding direction requires a new qualification test.

Table 1.3.3.9.1

Range of qualification

Weld details of test piece single-side welding/welding without backing

(ss nb)

single-side welding/welding with backing

(ss mb)

welding from both sides(bs)

single-side welding/welding without backing (ss nb) x x x

single-side welding/welding with backing (ss mb) - x x

welding from both sides (bs) - x xNote:x indicates those welds for which the welder is qualified.- indicates those welds for which the welder is not qualified.

Table 1.3.3.9.2

Range of qualificationTest piecea single layer

(sl)multi layer

(ml)single layer (sl) x -multi layer (ml) x xa Throat thickness shall be in the range of 0,5 x t a 0,7 x tNote:x indicates the layer technique for which the welder is qualified.- indicates the layer technique for which the welder is not qualified.


2009

1.3.4 Welding and testing of test piece1.3.4.1 General

The welding and testing of a test piece shall bewitnessed by a Surveyor to the Register or another test bodyapproved by the Register for that purpose.1.3.4.2 Shape and dimensions of test piece

The shape and dimensions of test piece areshown in Figures 1.3.4.2-1, 1.3.4.2-2, 1.3.4.2-3 and 1.3.4.2-4.1.3.4.3 Welding conditions

The approval test for the welder shall corre-spond to the conditions in production and shall follow thewelding process specification (WPS), i.e. the following con-ditions:

a) The test shall be carried out with the weldingprocesses to be used in production.

b) Filler metal(s) shall be in accordance with thewelding procedures and positions applied.

c) The edge preparation of plates and/or pipesfor test piece shall be representative of that tobe used in production.

d) The electrical source for welding shall corre-spond to that used in production.

e) Welders qualification test shall be carried outin the welding positions and angles of branchconnections normally used in production.

f) The test piece shall have at least one stop andone re-start in the root run and in the top run.

g) The welder shall be allowed to remove minorimperfections by grinding, except on the sur-face after finishing the weld. The approval ofthe Surveyor to the Register shall be ob-tained.

h) Test piece shall be properly marked.i) Any post-weld heat treatment required by

WPS can be omitted unless bend test are re-quired.

For t 6 mm, a 0,5 tFor t < 6 mm, 0,5 t a t(z 0,7 t)

Figure 1.3.4.2-1Dimensions of test piece for weld in plate

(Dimensions in millimetres)

Figure 1.3.4.2-2Dimensions of test piece for fillet weld(s) on plate



2009

t refers to the thinner partFor t 6 mm, a 0,5 tFor t < 6 mm, 0,5 t a t(z 0,7 t)

Figure 1.3.4.2-3Dimensions of test piece for weld in pipe


Figure 1.3.4.2-4Dimensions of test piece for a fillet weld on pipe


1.3.4.4 Test methods

The completed weld shall be examined visu-ally. After satisfactory visual examination the additional testsshall be carried out in compliance with Table 1.3.4.4.1 (steel)and Table 1.3.4.4.2 (Al and Al-alloys).

When permanent backing was used in the quali-fication test it shall be removed prior to destructive testing.

The test specimen for macroscopic examinationshall be prepared and etched on one side to clearly reveal theweld. Polish is not required.

When radiographic testing of butt welds madeby welding processes 131, 135, 136 (only metal cared wires)and 311 it shall be supplemented by either two additionalbend tests (one face and one root or two side bends) or twofracture tests.

Table 1.3.4.4.1 (steel)Test method

Test method Butt weld(in plate or pipe) Fillet weld and branch connection

Visual testing according to (HRN EN 970) mandatory mandatoryRadiographic testing according to(HRN EN 1435)

mandatory 1,2,3 not mandatory

Bend test according to (HRN EN 910) mandatory 1,2,6 not applicableFracture test according to (HRN EN 1320) mandatory 1,2,6 mandatory 3,5

1) Either radiographic testing or bend or fracture tests shall be used.2) When radiographic testing is used, then additional bend or fracture tests are mandatory for welding processes 131, 135, 136

(only metal cored wire) and 311.3) The fracture tests may be replaced by macroscopic examination according to HRN EN 1321 of at least two sections.4) The radiographic testing may be replaced by an ultrasonic testing according to HRN EN 1714 for thickness 8 mm onferritic

steels only.5) The fracture tests on pipes may be replaced by radiographic testing.6) For outside pipe diameter D 25 mm, the bend or fracture tests may be replaced by a notched tensile test of the complete test

piece (example is given in Figure 1.3.4.5.1-d).


2009

Table 1.3.4.4.2 (Al and Al-alloys)Test methods

Test methods Butt weld(in plate or pipe) Fillet weld and branch connection

Visual testing according to (HRN EN 970) mandatory mandatoryRadiographic testing according to(HRN EN 1435)

mandatory 1,2 not mandatory

Bend test according to (HRN EN 910) mandatory 1,2,5 not applicableFracture test according to (HRN EN 1320) mandatory 1,2,5 mandatory 3,4

1) Except process 131, either radiographic testing or bend or fracture tests shall be used.2) When radiographic testing is used, then additional bend or fracture tests are mandatory for welding processes 131.3) The fracture tests may be replaced by macroscopic examination according to HRN EN 1321 of at least two sections.4) The fracture tests on pipes may be replaced by radiographic testing.5) For outside pipe diameter D 25 mm, the bend or fracture tests may be replaced by a notched tensile test of the complete test

piece (example is given in Figure 1.3.4.5.1-d).

1.3.4.5 Test pieces and test specimens

1.3.4.5.1 But weld in plate and pipeWhen radiographic testing is used, (see Figures

1.3.4.5.1-a, and c-1, c-2), the examination length in the testpiece shall be radiographed in the as-welded condition (with-out removal of excess weld metal).

When fracture testing is used, the test piece ex-amination length shall be cut into the test specimen of equalwidth (which must be 40 mm, see Figure 1.3.4.5.1-b). Toreach fracture in weld metal test specimen may be addition-ally notched on edges to depth ~ 5 mm.

When transverse bend testing according HRNEN 910 is used, 2 root bend test specimen and 2 face bendtest specimen shall be tested. The diameter of the former orthe inner roller shall be 4 x t, and the bending angle 180o forparent metal with elongation A 20%.

When only transverse bend test is carried out,the examination length shall be cut into test specimens ofequal width and all of them shall be tested. When only sidebend test are used, a minimum of four test specimen shall betaken equally spaced along the examination length. One ofthese side bend tests shall be taken from the start and stoparea in the examination length.

For pipes, the number of the additional fractureor transverse bend tests specimens to welding processes 131,135, 136 (only metal cored wire) or 311, using the radio-graphic testing, depends on the welding position. For allwelding positions, two root and two face bend test specimenshall be tested (see Figures 1.3.4.5.1-c1 and c-2).

a) Dimensions of test piece-plate

Inspection length of the test specimen

b) Preparation

c-1) Position and number of test pieces for PA and PC position

(1-root, 2-face)

c-2) Position and number of test pieces for PF, PG, H-L045and J-L045 positions

(1 and 3-root, 2 and 4-face)


2009

d) Tensile test of the complete test pieceFigure 1.3.4.5.1

Preparation and fracture testing of test specimens for abutt weld on plate


1.3.4.5.2 Fillet weld on plateFor the fracture test according to HRN EN

1320, the test piece may be cut, if necessary, into several testspecimens (see Figure 1.3.4.5.2). Each test specimen shall bepositioned for breaking in accordance with HRN EN 1320and examined after fracture.

When macroscopic examination is used, at leasttwo test specimen shall be taken, one macroscopic specimenshall be taken at the stop/start location.

a) Section into an even-number of test specimen b) Fracture testing(The fillet weld may be notched, if necessary)

Figure 1.3.4.5.2Preparation and fracture testing of test specimens for a fillet weld on plate

(dimensions in millimetres)

1.3.4.5.3 Fillet weld on pipeFor fracture test according to HRN EN 1320,

the test piece shall be cut into 4 or more test specimens andfractured (see Figure 1.3.4.5.3).

When macrosonic examination is used, at leasttwo test specimen shall be taken, one macroscopic specimenshall be taken from the stop/start location.

Figure 1.3.4.5.3

1.3.5 Acceptance requirements for test pieces

Test pieces shall be evaluated according to theacceptance requirements specified for relevant types of de-fects. Full explanation of these defects is given in HRN EN6520.

The acceptance requirements for defects foundby these methods according to this standard shall be assessedin accordance with HRN EN ISO 5817 for steel and in accor-dance with HRN EN ISO 10042 for aluminium alloys. Awelder is approved if the defects in the test piece are withinthe specified limits of level B in HRN EN ISO 5817 for steeland in accordance with HRN EN ISO 10042 for aluminiumalloys. Exceptions are the following defects: excess weldmetal (butt weld), excess thickness of a fillet weld, excessthroat thickness and excessive penetration, for which level Cshall apply.

If the defects in the welders test piece exceedthe permitted maximum, then the welder shall not be ap-proved.

Length of thetest piece


2009

1.3.6 Re - tests

If it is established that failure is due to the met-allurgical or other external causes and cannot be attributed tothe welders lack of skill, an additional test shall be requiredin order to assess the quality and integrity of the new test oradditional specimen material and/or new test conditions.

1.3.7 Period of validity

1.3.7.1 Initial approval

The validity of the welders approval beginsfrom the date when all the required tests are satisfactorilycompleted. This date may be different from the date of issuemarked on the certificate. The welders approval shall remainvalid for two years provided that the following conditions arefulfilled and that this is stipulated in the relevant certificate atthe 6 month intervals by the employer or the supervisor.

a) The welder shall be engaged with reason-able continuity on welding work withinthe current range of approval. Ann inter-ruption for a period no longer than 6months is permitted.

b) The welders work shall be in general ac-cordance with the same technical condi-tions as those under which the approvaltest has been carried out. If any of theseconditions are not fulfilled, the approvalshall be cancelled.

1.3.7.2 Prolongation

The validity of the Approval Test Certificatemay be prolonged for future periods of two years within theoriginal range of approval provided that:

- the production welds made by the welderare of the required quality;

- records of tests, e.g. documentation on x-ray or ultrasonic examinations as well astest reports on fracture test or remarks ofthe appointed supervisors shall be main-tained on file with the welders ApprovalCertificate.

The Surveyor to the Register shall verify com-pliance with the above conditions and sign the prolongationof the welders Approval test Certificate.

1.3.8 Welder Approval Test Certificate Form

This Certificate shall certify that the welder hassatisfied the examination tests. If one of the tests has not beensatisfied, the Certificate shall not be issued to the welder.

The Approval Test Certificate shall be issuedonly at the sole responsibility of the examiners or testingbodies.

1.4 WELDING PROCEDURE TESTS

1.4.1 General

Welding procedures applied to the manufactureand build in of structures referred to in 1.1.1 shall be tested

and approved by the Register in compliance with the re-quirements of this Chapter. This Chapter specifies the scopeand methods of the welding procedure testing for the arcwelding of steels and aluminium alloys referred to in 1.3.1.2.The welding procedure tests of other metallic materials shallbe considered by the Register in each particular case.

1.4.2 Definitions

1.4.2.1 Generala) Welding procedure specification is a

specification of materials, weld shape,method of welding and parameters em-ployed in the welding of a particular joint.

b) Welding procedure qualification is a testcarried out in order to demonstrate that aweld performed in accordance with thewelding procedure specification complieswith the given requirements.

c) Welding Production Test is a test carriedout on the test plates which are weldedunder the same conditions as the produc-tion welding in order to check the weld-ing procedure specification and the re-quired properties of the welded joint.

1.4.2.2 Welding procedure specification

The organization which apply for testing ofwelding procedure shall submit to Register preliminarywelding procedure specification containing the followingdata:

- base material (standard, conditions ofheat treatment),

- dimensions of base material (thickness,diameter),

- joint/grove design,- welding procedure,- position and direction of welding- welding consumables (grade, trade name,

wire diameter, shielding gas, flux);- number of passes (layers),- welding parameters (voltage, current,

speed);- preheat and interpass temperature,- post-weld heat treatment.

1.4.3 Test piece

1.4.3.1 General

The test piece for welding procedure test shallbe of a sufficient dimensions to ensure a reasonable heat dis-tribution (dissipation).

1.4.3.2 Materials, direction of rolling

The materials used in the welding proceduretest must be unambiguously identifiable on the basis of theirmarking and certificates. The direction of rolling of the testpiece must be ascertainable, and shall be parallel to the di-rection of welding. The orientation of the rolling directionshall be stated in the test report.


2009

1.4.3.3 Shape and dimensions of test piecea) Butt weld in plate

The test piece shall be in accordance withthe Figure 1.4.3.3-1.The length of the test piece shall be suffi-cient to provide for the appropriate testspecimens as given in Tables 1.4.4.1-1and 1.4.4.1-2.

Edge preparation and fit-up as detailed in the preliminarywelding procedure specification

a = 3 t: minimum value 150 mmb = 6 t: minimum value 350 mm

Figure 1.4.3.3-1Test piece for a butt weld in plate

b) Butt weld in pipeTest piece shall be in accordance withFigure 1.4.3.3-2. When small pipe di-ameters are used, several test pieces mayappear necessary.

Edge preparation and fit-up as detailed in the preliminarywelding procedure specification

a = minimum value 150 mmD = outside diametert = wall thickness

Figure 1.4.3.3-2Test piece for a butt weld in pipe

c) Branch connectionThe test piece shall be in accordance withFigure 1.4.3.3-3. The angle is theminimum to be used in production. In thiscase a branch connection is considered asa fully penetrated joint.

Edge preparation and fit-up as detailed in thepreliminary welding procedure specification

a = minimum value 150 mmD1 = outside diameter of the main pipet1 = wall thickness of the main pipeD2 = outside diameter of the branch pipet2 = wall thickness of the branch pipe = angle between main and branch pipe

Figure 1.4.3.3-3Test piece for a branch connection or a fillet weld on pipe

d) Fillet weldThe test piece shall be in accordance withFigure 1.4.3.3-4 for plates, or with Figure1.4.3.3-3 for pipes.

a = 3 t; minimum value 150 mmb = 6 t; minimum value 350 mmt1 and t2 = thickness of the plates

Figure 1.4.3.3-4Test piece for a fillet weld on plate (T-joint)

Weld one side or bothsides and fit-up asdetailed in the prelimi-nary welding procedurespecification

t


2009

1.4.3.4 Welding of test piece

Preparation and welding of test piece shall becarried out in accordance with the welding procedure specifi-cation and in the presence of a Surveyor to the Register.

1.4.4 Examination and testing

1.4.4.1 Extent of testing

The testing including non-destructive examina-tion as well as destructive testing shall be in accordance withthe Table 1.4.4.1-1 (for steel) and Table 1.4.4.1-2 (for alu-minium alloys).

Table 1.4.4.1-1 (steel)

Test piece Type of test Extent of testing Note

Butt weld with full penetrationFigures 1.4.3.3-1and 1.4.3.3-2

VisualRadiographic or ultrasonicSurface crack detectionTransverse tensile testTransverse bend test

Impact testHardness testMacro examination

100%100%100%

2 specimens2 root and

2 face specimens2 sets (each 3 specimens)

required1 specimen

-41-2

63-

T-joint with full penetrationFigure 1.4.3.3-4Branch connectionFig. 1.4.3.3-3

VisualSurface crack detectionUltrasonic or radiographicHardness testMacro radiographic examination

100%100%100%

required2 specimens

51 and 5

4,5 and 73 and 5

5

Fillet weld on plateFig. 1.4.3.3-4Fillet weld on pipeFig. 1.4.3.3-3

VisualSurface crack detectionHardness testMacro radiographic examination

100%100%

required2 specimens

51 and 53 and 5

5

Notes:1) Penetrant testing or magnetic particle testing.

For non-magnetic materials, penetrant testing.2) 2 root and 2 face bend test specimens may be substituted by 4 side bend test specimens for t 12 mm.3) Not required for parent materials subgroup 1.1 and group 8.4) Ultrasonic testing is applicable for t < 8 mm and for material groups 8 and 10.5) Testing as detailed does provide information on the mechanical properties of the joint. Where these properties are relevant to the

application an additional approval shall also be held e.g. a butt weld approval.6) 1 set in the weld metal and 1 set in the HAZ. Required only for t 12 mm and only for parent materials having specified impact

properties. If a testing temperature has not been specified, testing shall be performed at room temperature (see also 1.4.4.4-d).7) For outside diameter 50 mm, no ultrasonic test is required.

For outside diameter > 50 mm, if it is not technically possible to execute the ultrasonic examination, radiographic examinationshall be provided that the joint configuration will allow meaningful results.


2009

Table 1.4.4.1-2 (aluminium alloys)

Test piece Type of test Extent of testing Note

Butt weld with full penetrationFigures 1.4.3.3-1and 1.4.3.3-2

VisualRadiographic or ultrasonicPenetrant testTransverse tensile testTransverse bend test

Macro-examinationMicro-examination

100%100%100%

2 specimens2 root and

2 face specimens1 specimen1 specimen

----1

-2

T-joint with full penetrationFigure 1.4.3.3-4Branch connection 3)Fig. 1.4.3.3-3

VisualPenetrant testMacro-examinationMicro-examination

100%100%

4 specimens1 specimens

--42

Fillet weld on plate 3)Fig. 1.4.3.3-4Fillet weld on pipeFig. 1.4.3.3-3

VisualPenetrant testMacro-examinationMicro-examination

100%100%

2 specimens1 specimens

---2

Note:1) 2 root and 2 face bend test specimens may be preferably substituted by 4 side bend test specimens for t 12 mm.2) Only for material groups 23 and all casting alloys.3) Testing as detailed does not provide information on the mechanical properties of the joint. Where these properties are relevant to

the application an additional approval shall also be held e.g. a butt weld approval.4) For test specimen in accordance with Figure 1.4.3.3-4, only 2 macro specimens.

1.4.4.2 Location and cutting of test specimens

The location of test specimens shall be in ac-cordance with figures 1.4.4.2-1, 1.4.4.2.-2 and 1.4.4.2-3.

The cutting of test specimens shall be carriedout mechanically after the satisfactory results of the non-destructive examination (X-ray or US).

Area 1 for:- 1 tensile specimen- bend specimens

Area 2 for:- impact and additional test specimens if required


Area 4 for:- 1 macro test specimen (steel, aluminium, alloys)- 1 hardness test specimen (steel)- 1 micro test specimen (aluminium alloys)

Figure 1.4.4.2-1Location of test specimens for a butt weld in plate

Discard 25 mm

Discard 25 mm


2009


Area 2 for:- impact and additional test specimens if required

Area 3 for:- 1 tensile specimens- bend specimens

Area 4 for:- 1 macro test specimen (steel, aluminium, alloys)- 1 hardness test specimen (steel)- 1 micro test specimen (aluminium alloys)

Figure 1.4.4.2-2Location of test specimens for a butt weld in pipe

Figure 1.4.4.2-3Location of test specimens for a branch connection or a fillet weld on pipe

Top for fixed pipe

a) steel1) Specimen for macro and hardness ex-

amination to be taken in positionsA and B

2) Specimen for macro only in position B

b) aluminium alloys1) Specimen for macro to be taken

in positions A and B2) Specimen for micro only in

position A


2009

Figure 1.4.4.4-eTypical examples of hardness testing

1.4.4.3 Non-destructive examinationa) steelAfter any required post-weld heat treatment and

prior to the cutting of test specimens, all test pieces shall beexamined visually and subjected to a non-destructive exami-nation in accordance with Table 1.4.4.1-1. For non-post weldheat treated test pieces, account should be taken of the mate-rials that are susceptible to hydrogen induced cracking andconsequently the NDE should be delayed.

Depending upon joint geometry, materials andrequirements for work, the NDE shall be carried out in ac-cordance with appropriate standards (HRN EN 970 - visualexamination; HRN EN 1435 - radiographic examination;HRN EN 1714 - ultrasonic examination; HRN EN 1289penetrant testing and HRN EN 1290 - magnetic testing).

A welding procedure is approved if the imper-fections in the test piece are within the specified limits oflevel B in HRN EN ISO 5817, except for imperfection types:excess weld metal, excess convexity, excess throat thicknessand excessive penetration, for which level C in HRN EN ISO5817 shall apply.

b) aluminium alloysAfter any required post-weld heat treatment

natural or artificial ageing and prior to the cutting of testspecimens, all test pieces shall be examined visually and non-destructively in accordance with Table 1.4.4.1-2.

Depending upon joint geometry, materials andrequirements for work, the NDE shall be carried out in ac-cordance with appropriate standards (HRN EN 970 - visualexamination and HRN EN 1289 penetrant testing).

A welding procedure is approved if the imper-fections in the test piece are within the specified limits oflevel B in HRN EN ISO 10042, except for imperfection typesas follows: excess weld metal, excess convexity, excessthroat thickness and excessive penetration, for which level Cin HRN EN ISO 10042 shall apply.

1.4.4.4 Destructive testsa) Transverse tensile testing

Specimens and testing for transversal ten-sile testing for butt joints shall be in ac-cordance with 2.4.3. For pipes with out-side diameter > 50 mm, the weld rein-forcement shall be removed on both sidesto give a test specimen a thickness equal


2009

to the wall thickness of the pipe. Forpipes with outside diameter, 50 mmwhen the full section of pipe is used astest specimen, the weld reinforcementmay be left undressed on the inside sur-face of the pipe.The tensile strength on the test specimenshall normally not be less than the corre-sponding specified minimum value forthe base material (for steel).The tensile strength of the test specimenshall normally not be less than the corre-sponding specified minimum value forthe base material, in the "soft" condition(for aluminium alloys).For dissimilar materials (different alloys)tensile strength of weaker material injoint should be achieved.

b) Bend testingSpecimens and testing for butt joints shallbe in accordance with 2.4.4.For dissimilar materials, one root and oneface longitudinal bend test specimen maybe used instead of four transverse bendtest specimen. The diameter of the formershall be 4 x t and the bending angle 180o(for steels).For all groups of aluminium alloys thebend angle shall be 180o using the formerdiameter given in Table 1.4.4.4-b.During testing, the test specimens shallnot reveal any cracks > 3 mm in any di-rection.

c) Macro-examinationThe test specimen shall be prepared andetched in accordance with HRN EN 1321on one side to clearly reveal the fusionline, the heat affected zone (HAZ) and thebuild up of the runs. The acceptance levelstated in 1.4.4.3-a) and -b) shall be appli-cable.

d) Impact testingTest specimen and testing for impact testsfor butt joints shall be in accordance with2.4.5. Impact tests shall cover two setscomprising 3 test specimens each(Charpy V-notch), one set with notch atthe weld centerline and the other set withnotch in the heat affected zone (1 to 2mm from the fusion line), The V-notchshall be cut perpendicular to the weld sur-face. For thickness > 50 mm, two addi-tional sets of specimens shall be taken,one form the weld metal and one from theheat affected zone below the mid thick-ness or in the weld root area. Test tem-perature and absorbed energy shall be inaccordance with the specified require-ments.For dissimilar materials, one set ofspecimens from heat affected zone shallbe carried out for each base material.

e) Hardness testingThe hardness testing shall be in accor-dance with 2.4.6. The Vickers methodHV10 shall be used. The indentation shallbe made in the weld, in the heat affectedzone and in the base material. Typical ex-amples of hardness testing are shown inFig.1.4.4.4-e. For each row of indentationthere shall be a minimum of 3 individualindentations in each part of the weld, theheat affected zone (both sides) and thebase material (both sides). The results ofthe hardness test shall meet the require-ments in Table 1.4.4.4-e.

f) Micro-examinationThe test specimen shall be prepared andetched in accordance with HRN EN 1321on one side to clearly reveal the fusionline, the HAZ and the build up of theruns.

Table 1.4.4.4-bFormer diameter of bend test (aluminium alloys)

Former diameter

Temper or condition (see EN 515)Materialgroups

0

FH112H12H22H32

H14H24H34

H16H26H36

H18H28H38

H19H29H39

T4 T5-T6 T7

21 2 t 3 t 3 t 3 t 4 t 4 t - - -22.1 3 t 3 t 3 t 4 t 5 t 5 t - - -22.2 6 t 6 t 6 t 6 t 6 t 6 t - - -23 4 t - - - - - 6 t 7 t 8 t


2009

Table 1.4.4.4-ePermitted maximum hardness values HV 10

Single run butt and fillet welds Multi-run butt and fillet weldsSteel group

HRN CEN ISO/TR15608

Non-heat treated Heat treated Non-heat treated Heat treated

1(1),2 380 320 350 320

3(2) 450 (3) 420 -

4,5 350 320 - 320

6 - 350 - 350

9.19.29.3

350450450

300350350

320400

-

300--

Notes:1) If hardness tests are required.2) For steels with min. ReH > 890 N/mm2, special values are required.

1.4.4.5 Re-testing

If the test piece fails to comply with any of therequirements for visual examination or non-destructive ex-amination referred to in 1.4.4.3-a) and -b), a new test pieceshall be subjected to the same examination. If this additionaltest piece does not comply with the relevant requirements,adequate modifications of welding procedure specificationshall be carried out prior to repeated tests.

If any test result fails to comply with the re-quirements for destructive tests referred to in 1.4.4.4, the re-test shall be carried out with double test piece. These can betaken from the same test piece if there is sufficient materialavailable, or from a new test piece. If either of these addi-tional test specimens does not comply with the relevant re-quirements, the due modifications in the welding procedurespecification shall be carried out prior to repeated tests.

1.4.5 Range of approval validity

1.4.5.1 All the conditions of validity specified in thisitem shall be considered independently of each other. Resultsoutside of the range specified, shall require a new weldingprocedure test.

1.4.5.2 An approval of welding procedure specificationobtained by a manufacturer is valid for welding in workshopsunder the same technical and quality control of that manu-facturer.

1.4.5.3 Range of qualification for steel groups and sub-groups (for base material) are shown in Table 1.4.5.3.

Table 1.4.5.3Range of qualification for steel groups and sub-groups

Material (sub) group oftest piece Range of qualification

1 - 1 1a - 1

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

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

4 - 4 4b 4,4b 1,4b - 2

5 - 5 5b 5,5b 1,5b - 2

6 - 6 6b 6,6b 1,6b - 2

7 7 7c - 7


2009

Table 1.4.5.3-continuous

Material (sub) group oftest piece Range of qualification

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

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

8 8 8c - 8

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

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

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

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

9 - 9 9b - 9

10 - 10 10b - 10

10 8 10b 8c

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

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

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

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

11 - 11 11b 11,11b - 1

Note:a Covers the equal or lower specified yield strength steels of 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.

Table 1.4.5.4Range of qualification for aluminium and al-alloys similar and dissimilar metal joints

Material (sub-)group of the test

piece

Similar joint range(sub-) groups Dissimilar joint range (sub-) groups

21 to 21 21 to 21 Not applicable22.1 to 22.122.1 to 22.122.2 to 22.2

22.1 to 22.2

22.2 to 22.222.2 to 22.222.1 to 22.1

22.1 to 22.2

22.3 to 22.322.1 to 22.122.2 to 22.2

22.3 to 22.3

22.4 to 22.4

Combination between 22.1, 22.2, 22.3 and 22.4

22.4 to 22.422.1 to 22.122.2 to 22.2

22.4 to 22.4

22.3 to 22.3

Combination between 22.1, 22.2, 22.3 and 22.4

23.1 to 23.122.1 to 22.122.2 to 22.2a

22.3 to 22.3a

23.1 to 23.1

22.4 to 22.4a

Combination between 22.1, 22.2a, 22.3a and 22.4a


2009

Table 1.4.5.4-continuous

Material (sub-)group of the test

piece

Similar joint range(sub-) groups Dissimilar joint range (sub-) groups

23.2 to 23.2 23.2 to 23.123.1 to 23.122.1 to 22.122.2 to 22.222.3 to 22.3a

23.2 to 23.2

22.4 to 22.4a

Combination between 22.1, 22.2a, 22.3a and 22.4a

24.1 to 24.1 24.1 to 24.1 Not applicable24.2 to 24.224.1 to 24.1

24.2 to 24.2

23.1 to 23.1b

24.2 to 24.1 and 24.1 to 23.1b

25 to 25 25 to 24.124.1 to 24.1

25 to 25

24.2 to 24.225 to 24.2

26 to 2624.1 to 24.1c

24.2 to 24.2c

26 to 26

25 to 25c

26 to any of 24.1c, 24.2c or 25c

Note: The qualification is valid provided the same filler material is used.

a) Provided Al-Mg filler material is usedb) Provided Al-Si filler material is usedc) Only for castings

1.4.5.4 Range of qualification for Al and Al-alloysgroup (for base material) including dissimilar base materialare shown in Table 1.4.5.4.

1.4.5.5 Range of approval with regard to the nominalthickness of the butt joint test piece is given in Table 1.4.5.5.Nominal thickness for test pieces of different thickness shallbe that of the thinner test piece.

1.4.5.6 The range of approval for thickness for filletwelds is specified in such a way that in Table 1.4.5.5 therange of approval of the throat thickness a-0,75 a to 1,5 a hasbeen added, for throat thickness a 10 mm the range of ap-proval shall be for all throat thickness 10 mm. In this casethe nominal thickness is that of thinner fillet weld.

Table 1.4.5.5Range of approval for thickness-butt joint

Range of approval2)Thickness of the test piece,t (mm)1)

for single run or single runfrom both sides for multi-run welding

t 33 < t 12

12 < t 100t > 100

0,7 t to 1,3 t0,5 t to 1,3 t0,5 t to 1,1 t

not applicable

0,7 t to 2 t3 to 2 t

0,5 t to 2 t (max 150)0,5 t to 1,5 t

Notes:1) For multi process procedures, the recorded thickness contribution of each process may be used as

a basis for the range of approval for the individual welding process.2) For grade where impact test is required, when the test is carried out on a thickness < 12 mm

approval is < 12 mm without impact testing.


2009

1.4.5.7 Range of approval for pipe nominal thickness(less thickness of pipe wall ) and branch connections (thick-ness of branch connection wall ) has been specified in Table1.4.5.7.

Table 1.4.5.7Range of approval for pipe and branch connections

Diameter of test piece D1)2) mm Range of approvalD 168,3 0,5 D to 2 DD > 168,3 0,5 D and plates2)3)

Notes:1) D is the outside diameter of the pipe or outside diameter

of the branch connection.2) Approval given for plates also covers pipes when the out-

side diameter is > 500 mm, or when D > 150 mm finishedin PA or PC position.

3) See also 1.4.5.9

Procedure test carried out on a branch connec-tion with angle shall approve all branch angles in therange of 1 90.1.4.5.8 Procedure approval is valid only for the weld-ing process applied in the welding procedure test. It is notpermitted to change a multi run deposit into a single run (orsingle run on each side) or vice versa for a given process. In amulti-process procedure test the approval is only valid for theorder used during the approval test.

1.4.5.9 Range of approval for welding process whenneither impact or hardness tests are required for welded jointsin any position (plate or pipe) is valid for welding in all posi-tions (pipe or plate).

1.4.5.10 Range of approval relating to the types ofwelded joints used in the procedure tests is given in Table1.4.5.10.

Table 1.4.5.10Range of qualification for type of joint

Range of qualification

Butt joint on plateb Butt joint on pipe Branch connections

Welded from one side Welded from both sidesWelded

from oneside

Weldedfrom both

sides

Fillet weldson pipe and

plateType of joint in the test piece used in the

welding procedure test

withbacking

nobacking

withbacking

nobacking - - -

withbacking

x - x - - - xWelded from

one side nobacking

x x xa xa xa xa xBut joint onplateb

Welded fromboth sides x - x - - x

a x

nobacking x - x x - x

a x

withbacking

x - x - - x xBut joint on

pipeWelded from

one side nobacking

x x x x x x x

Welded fromone side - - - - - x x xBranch con-

nections Welded fromboth sides - - - - - - x x

Fillet weldson pipe and

plate- - - - - - - - x

Key:x indicate those welding types of joint covered by the WPS.- indicate those welding types of joint not covered by the WPSa Plate qualifies pipe with D > 500 mmb Butt joints on plate qualify T-joints


2009

1.4.5.11 Range of approval for filler metals covers otherfiller metals of the same group and chemical composition.Change in the type of coating will require new testing.

1.4.5.12 The approval given for the type of the currentand polarity used in the welding procedure test shall be validonly for the identical conditions during the testing.

1.4.5.13 Range of approval for the heat input, preheatingtemperature, interpass temperature and post-weld heat treat-ment are specified in HRN EN ISO 15614-1 and HRN ENISO 15614-2 standards.

1.4.5.14 Changes outside of the range specified for thespecific processes are specified in HRN EN ISO 15614-1 andHRN EN ISO 15614-2 standards.

1.4.6 Welding procedure approval record

The welding procedure approval record certi-fies that the testing has been satisfactory carried out.

1.5 WELDING CONSUMABLES

1.5.1 General

1.5.1.1 All welding consumables used for welding ofstructures referred to in 1.1.1 shall be tested and approved bythe Register.

1.5.1.2 The Register shall grant the approval for thewelding consumables on the basis of the manufacturers ap-plication, technical documentation (1.5.1.3) as well as on thebasis of the results obtained from the testing carried out underthe supervision of the Register and with the approved pro-gram according to the present Chapter.

1.5.1.3 Application for approval shall be submitted tothe Register by the manufacturer of the welding consumableaccompanied with the documentation including the follow-ing:

name of the manufacturer of the weldingconsumables,

trade name, mark , and type , grade of the welding material , including

additional symbols (if necessary ) in com-pliance with these Rules,

recommended area of application , includ-ing for example, base material, welding po-sitions and similar,

chemical composition and mechanicalproperties of weld metal,

sizes (diameters, lengths), instructions manual (current, polarity),

backing, heat treatment etc., classification (EN, ISO etc.), marking, packaging, proposed testing laboratory and date of test.

1.5.1.4 On the ground of satisfactory testing results theRegister shall issue the Certificate on the type approval andtesting of welding consumables and shall enlist it in its Listof type approved products and manufacturers. With such anapproval the manufacturer is liable to ensure that, during

manufacture the composition and properties of the productscomply with those of the tested welding consumables.

1.5.1.5 The manufacturer is liable to enter the informa-tion on the approval certificate into its catalogue of the list ofapproval and testing of welding consumables.

1.5.1.6 Unless otherwise agreed, the approved weldingconsumables shall be in accordance with 1.5.2 - 1.5.8, testedannually in the presence of a Surveyor to the Register toprove that the material properties comply with those of thetested welding consumables.

1.5.1.7 In case of any change of the properties, chemi-cal composition of the approved material or the technology ofits production, the tests shall be repeated.

1.5.1.8 Welding consumables which are not covered bythese Rules (e. g. for welding of high - alloy steels etc.) shallbe tested for the approval in accordance with the special pro-gram approved by the Register.

1.5.1.9 When the results of any testing fail to meet therequirements that testing shall be repeated on duplicate re-test specimens.

For that purpose test specimen may be takenfrom the same batch as the former test pieces. In case that re-testing does not give satisfactory results, the causes shall betraced and the whole testing repeated.

1.5.1.10 Welding consumables for the welding of hullstructural steels including the relevant grades of steel forg-ings and castings and the structural steels shall be classified,marked and approved as follows:

according to their nature ( covered elec-trode for manual and gravity welding, wire/flux combinations for two - run or multi -run welding, solid wire/gas combinationsfor arc welding or flux cored wires with orwithout gas, consumables for use in elec-troslag and electrogas vertical welding ),

for the welding of normal strength hullstructural steels - grades 1, 2, and 3,

for the welding of higher strength hullstructural steels with minimum yieldstrength up to 355 N/mm2 - grades 1Y, 2Y,3Y and 4Y,

for the welding of higher strength hullstructural steels with minimum yieldstrength up to 390 N/mm2 - grades 2Y 40,3Y40 and 4Y40,

Additional markings: for the controlled hydrogen content of the

weld metal the symbol H15 , H10 or H5(refer to grades 2, 3, 2Y, 3Y, 4Y, 2Y40,3Y40 and 4Y40 ),

for semi-automatic welding, symbol S, for automatic welding, symbol T (two run

technique), for welding in one pass fromeach side, symbol M (multirun technique)or symbol TM which covers both tech-niques,

for electro-gas or electro-slag weldingsymbol V.

Note:- normal hull structural steels grades - A, B, D and E,


2009

- higher strength hull structural steels (with minimum yieldstrength 355 N/mm2) - grades A 32, D 32, E 32, A 36, D36 and E 36,

- higher strength hull structural steels (with minimum yieldstrength 390N/mm2) - grades A 40, D 40 and E 40

- higher strength hull structural steels for low temperatureapplication - grades F 32, F 36, and F 40.

1.5.1.11 The higher quality grade covers the lower gradeApproval of welding consumables for the higher strength hullstructural steels cover the grades of welding consumables forthe normal strength hull structural steels.

1.5.1.12 Where the welding consumables are intendedfor welding with direct current or alternating current, thewelding shall be performed with the alternating current. Inspecial cases, the Register may require that the specimen (testpiece) is welded with direct current (e.g. covered electrodesfor gravity welding).

1.5.1.13 Test pieces for testing of welding consumablesshall be welded at the ambient temperature.

1.5.2 Covered electrodes for the manual arcwelding

1.5.2.1 Grades

Depending on the results of impact tests,(Charpy V- notch) the covered electrodes are divided into thefollowing grades:

for normal strength steels: grades 1, 2 and3,

for higher strength steels with the minimumyield strength up to 355 N/mm2 grades 2 Y,3 Y and 4 Y (grade 1 Y shall not be appli-cable for the manual welding).

for higher strength steels with the minimumyield strength up to 390 N/mm2 grades 2Y40, 3Y 40 and 4Y 40.

Figure 1.5.2.2-1

1.5.2.2 Testing the weld metal1. Two test pieces

rules for the classification of ships, pt. 26, 2009

Documents

hrn en iso15614

hrn en1714

european norm en

classification of shipspart

subject rules

classification ofshipspart

page1 general requirements

status of croatian norm