Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
ISO shall not be held responsible for identifying any or all such patent rights. This second edition cancels and replaces the first edition ISO , which has been technically revised. ISO consists of the following parts, under the general title Qualification testing of welders — Fusion welding:. A complete listing of these bodies can be found at www. Introduction The ability of a welder to follow verbal or written instructions and verification of a person's skills are important factors in ensuring the quality of the welded product.
The testing of a welder's skill in accordance with this International Standard depends on the welding techniques and conditions used, in which uniform rules are complied with and standard test pieces are used. The principle of this International Standard is that a qualification test qualifies a welder not only for the conditions used in the test, but also for all other conditions which are considered easier to weld in accordance with this International Standard.
The qualification test can be used to qualify a welding procedure and a welder provided that all the relevant requirements, e. All new qualifications shall be in accordance with each part of this International Standard from its date of issue. At the end of its period of validity, existing qualification tests of welders in accordance with the requirement of a national standard may be revalidated according to this International Standard.
This is providing that the technical intent of this International Standard is satisfied. It is necessary for the new range of qualification to be interpreted in accordance with the requirements of this International Standard.
It provides a set of technical rules for a systematic qualification test of the welder, and enables such qualifications to be uniformly accepted independently of the type of product, location and examiner or examining body. When qualifying welders, the emphasis is placed on the welder's ability manually to manipulate the electrode, welding torch or welding blowpipe, thereby producing a weld of acceptable quality.
The welding processes referred to in this part of ISO include those fusion-welding processes which are designated as manual or partly mechanized welding.
It does not cover fully mechanized and automated welding processes. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document including any amendments applies. ISO , Quality requirements for fusion welding of metallic materials — Part 2: Comprehensive quality requirements. ISO , Quality requirements for fusion welding of metallic materials — Part 3: Standard quality requirements.
ISO , Welding — Fusion-welded joints in steel, nickel, titanium and their alloys beam welding excluded — Quality levels for imperfections. ISO , Specification and qualification of welding procedures for metallic materials — Welding procedure specification — Part 1: Arc welding. ISO , Specification and qualification of welding procedures for metallic materials — Welding procedure specification — Part 2: Gas welding.
NOTE In submerged arc welding, flux backing may also reduce the risk of a weld pool collapse. The following abbreviations and reference numbers shall be used when completing the welder's qualification test certificate see Annex A. This part of ISO covers the following manual or partly mechanized welding processes reference numbers of welding processes for symbolic representations are listed in ISO :. The symbol for type of covering or core is based on those given in various International Standards on filler materials.
A acid covering B basic covering or electrode core — basic C cellulosic covering R rutile covering or electrode core — rutile, slow-freezing slag RA rutile — acid covering RB rutile — basic covering RC rutile — cellulosic covering RR rutile — thick covering. A minimum tensile elongation after fracture required by the material specification d diameter of the former or the inner roller ts thickness of the bend test specimen. The qualification of welders is based on essential variables.
For each essential variable, a range of qualification is defined. If the welder has to weld outside the range of welder qualification, a new qualification test is required. The essential variables are:. Each test normally qualifies only one welding process. A change of welding process requires a new qualification test. However, it is permitted for a welder to be qualified for two or more welding processes by welding a single test piece multi-process joint or by two or more separate qualification tests.
The ranges of qualification concerning the deposited thickness for each welding process used and for the multi-process joint for butt welds are given in Tables 1 and 6.
Table 1 — Deposited thickness range of weld metal for single and multi-process joints for butt welds. Deposited thickness range qualified according to Table 6 Welding process used for test piece Single process joint Multi-process joint.
The qualification test shall be carried out on plate, pipe or other suitable product form. The following criteria are applicable:. The qualification test shall be carried out as butt or fillet welding. The following criteria are applicable. It is, however, permissible to qualify a fillet weld in combination with a butt weld, e. See Annex C. For this combination test, all testing requirements specified in this part of ISO shall be fulfilled and associated ranges of qualification shall be given based on the test conditions.
For a branch weld, the range of qualification is based on the outside diameter of the branch. The test piece shall be at least 10 mm thick, or the thickness of the butt weld test piece if the thickness is less, and completed using a single layer in the PB position.
For this supplementary test, the welder shall be qualified for all fillet welds as given for the butt weld qualification variables related to the range of qualification for fillet welds e.
Tables 7, 8, 9, 10 and Fillet weld positions PA and PB are qualified by this test. The qualification test shall be carried out with filler material from one of the groups listed in Table 2.
When welding with filler materials outside the filler material grouping in Table 2, a separate test is required. Group Filler material for welding of Examples of applicable standards. Welding with a filler material in one group qualifies the welder for welding with all other filler materials within the same group, as well as other groups, listed in Table 3, and welding on parent materials from groups 1 to Table 3 — Range of qualification for filler material.
NOTE For processes and without filler material , the parent material group used in the test is the material group that the welder is qualified for.
The welder qualification test of butt welds is based on the deposited thickness and outside pipe diameters. The ranges of qualification are specified in Tables 6 and 7. It is not intended that deposited thickness or outside pipe diameters should be measured precisely, but rather the general philosophy behind the values given in Tables 6 and 7 should be applied. For test pieces of different outside pipe diameters and deposited thicknesses, the welder is qualified for:.
Table 6 — Range of qualification of deposited thickness for butt welds Dimensions in millimetres. Deposited thickness of test piece Range of qualificationa,b s. Key D outside pipe diameter s deposited thickness or fused metal thickness in butt welds t material thickness of test piece plate or wall thickness 1 branch 2 main pipe or shell.
Table 7 — Range of qualification for outside pipe diameter Dimensions in millimetres. Outside pipe diameter of test piecea Range of qualification D. Table 8 — Range of qualification of material thickness for fillet welds Dimensions in millimetres Material thickness of test piece Range of qualification t. In the case of branch welding, the deposited thickness criteria to which Table 6 applies and the outside pipe diameter criteria to which Table 7 applies are as follows:.
The range of qualification for each welding position is given in Tables 9 and The welding positions and symbols refer to ISO Welding two pipes with the same outside pipe diameter, one in welding position PH and one in welding position PC, also covers the range of qualification of a pipe welded in welding position H-L using upward welding. Welding two pipes with the same outside pipe diameter, one in welding position PJ and one in welding position PC, also covers the range of qualification of a pipe welded in welding position J-L using downward welding.
This test covers all positions for the direction of welding used in the test. Table 9 — Range of qualification for welding positions for butt welds.
Table 10 — Range of qualification for welding positions for fillet welds. When welding with process , a change from rightward welding to leftward welding, and vice versa, requires a new qualification test. Table 11 — Range of qualification for backings and consumable inserts.
Range for qualification for backing and consumable inserts. Table 12 — Range of qualification of layer technique for fillet welds. The welding of test pieces shall be witnessed by the examiner or examining body. The testing shall be verified by the examiner or examining body. The test pieces shall be marked with the identification of the examiner and the welder. Additionally, welding positions for all test pieces shall be marked on the test piece and, for fixed pipe welds, the 12 o'clock welding position shall also be marked.
The examiner or examining body may stop the test if the welding conditions are not correct or if it appears that the welder does not have the skill to fulfil the requirements, e.
A minimum test piece length for plates of mm is required; the examination length is mm. For pipe circumferences of less than mm, additional test pieces will be required with a maximum of three test pieces. Dimensions in millimetres. Figure 4 — Dimensions of test piece for a fillet weld on plate. Figure 5 — Dimensions of test piece for a butt weld in pipe. Key D outside pipe diameter l1 length of test piece t material thickness of test piece plate or wall thickness.
Figure 6 — Dimensions of test piece for a fillet weld on pipe. When more than one process is used, then at least one stop and restart shall be carried out for each process, this includes the root run and final run.
The stop and restart areas shall be marked. The permission of the examiner or examining body shall be obtained. If the weld is accepted by visual testing, the remaining test s according to Table 13 shall be carried out. When material backing is used in the qualification test, it shall be removed prior to destructive testing except for macroscopic examination and need not be removed before non-destructive testing NDT.
The test specimen for macroscopic examination shall be prepared and etched on one side to clearly reveal the weld. Polishing is not required.
Butt weld Test method Fillet weld and branch joint in plate or pipe. Bend test according to ISO mandatorya,b,d not applicable. BS en Iso 1 Uploaded by Ivan Garcia Garcia. Did you find this document useful? Is this content inappropriate? Report this Document. Flag for inappropriate content. Download now. Related titles. Carousel Previous Carousel Next. Jump to Page. Search inside document.
It is identical to ISO , incorporating corrigendum September It supersedes BS EN ISO , which is withdrawn, Please note that 1S0 corrigendum only affects the French edition, and has therefore not been incorporated in this version. Attention is drawn to clause 9. Users are responsible for its correct application.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. Once this standard is cited in the Official Journal of the European Union under that Directive, compliance with the normative clauses of this standard given in Table ZA.
Table ZB. Users of this standard should consult frequently the latest list published in the Official Journal of the European Union. Peaeaateaaeits 4 Reference numbers, symbols and abbreviated terms, 44 General 4. Revalidation of welder qualification 9. The work of preparing Internetional Standards is normally carried out through ISO technical committees.
Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. The main task of technical committees is to prepare Intemational Standards.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. This second edition cancels and replaces the first edition ISO , which has been technically revised. A complete listing of these bodies can be found at wu. At the end of its period of validity, existing qualification tests of welders in accordance with the requirement of a national standard may be revalidated according to this International Standard. This is providing that the technical intent of this International Standard is satisfied.
It is necessary for the new range of qualification to be interpreted in accordance with the requirements of this International Standard, It does not cover fully mechanized and automated welding processes. For dated references, only the edition cited applies.
For undated references, the fatest edition of the referenced document including any amendments applies.
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