Purchase your copy of BS EN ISO as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. A Reference number ISO (E) INTERNATIONAL STANDARD ISO First edition Approval testing of welders. ISO (E). INTERNATIONAL. STANDARD. ISO. First edition. Approval testing of welders — Fusion welding —. Part 3.
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Draft International Standards adopted by the Technical Committees are circulated to member bodies for voting. The welder’s approval test shall be carried out on test pieces and is independent of the type of construction.
The type of shielding gas shall not be incorporated in the designation but shall be included in the welder’s approval test certificate see Annex A of EN An approval test made on wrought material groups gives approval for cast material and a mixture of cast and wrought material in the same material group see 5. The following conditions shall apply: This standard covers the following welding processes: For any copper alloy not covered by any of the copper 96006-3 the welder shall carry out an approval test, which only approves for that copper.
The certificate shall be issued under the sole responsibility of the examiner or examining body and shall contain all the information detailed in Annex A of EN A welders approval is valid for a period of two years provided that the relevant certificate is confirmed at six months intervals by the welding coordinator or the employer, and that all the following conditions are fulfilled: When macroscopic examination is used, at least four test specimens shall be taken equally spaced in the inspection length.
A Reference number ISO Each change of the essential variables for the approval testing beyond the permitted ranges requires a new test and a new approval certificate. If any of these conditions are not fulfilled, the approval shall be revoked. Each test specimen shall be positioned for breaking as shown 9606- figure 6b, and examined after fracture.
Aluminium and aluminium alloys — Part 3: An interruption for a period no longer than six months is permitted; b There is no specific reason to question the welder’s skill and knowledge.
However, some countries can require that the welder undergoes a test of job knowledge. The test pieces shall be marked with the identification of the examiner and the welder before welding starts.
When transverse bend testing is used, one root bend test specimen and one face bend test specimen shall be tested in accordance with EN The certificate of approval testing is issued under the sole iwo of the examiner or examining body.
Each position one face fracture or one face transverse bend or one side bend test specimen b Sectioning into at least four test specimens c Inspection length of the test specimen NOTE Figure c shows the notch profile q d Fracture testing, face side e Fracture testing, root side Figure 7: A welder is approved if the imperfections in the test piece are within the specified limits of level B in ENexcept for imperfection types as follows: The test weld can be iiso to approve a welding procedure and a welder provided that all the relevant requirements, e.
In addition, the requirements for mechanical tests are indicated. This standard applies to the approval testing of welders for the fusion welding of copper.
Dimensions in millimetres Figure 1: This annex outlines the job knowledge that a welder should have to ensure that procedures are followed and common practices are complied with. Reference should also be made to the corresponding acceptance criteria for non-destructive examination. For undated references the latest edition of the publication referred to applies. In general, a welder’s approval test shall involve depositing weld metal having a chemical composition compatible with any copper in the parent metal group s.
This standard is applicable when the welder’s approval testing is required by the purchaser, by inspection authorities or by other organizations. The ability of the welder to follow verbal or written instructions and testing of his skill are important factors in ensuring the quality of the welded product.
BS EN ISO 9606-3:1999
Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. If the job knowledge test is carried out, it should be recorded on the welder’s certificate. The term ”copper” stands for copper and weldable copper alloys.
Test methods Test method Butt weld plate Butt weld pipe Fillet weld Visual mandatory mandatory mandatory Radiography mandatory mandatory not mandatory Bend mandatory 1 mandatory 1 not mandatory Fracture mandatory 1 mandatory 1 mandatory 2 Macroscopic not mandatory not mandatory not mandatory 2 Penetrant not mandatory not mandatory not mandatory 1 Bend or fracture test shall be used, but not both test methods.
Each criterion is considered to be a significant factor in the approval testing. The range of approval for each type of test is given in the relevant sub-clauses and tables. It does not cover fully mechanized and automatic processes see 5.
ISO 焊工的认可试验.熔焊.铜及铜合金 – MBA智库文档
The examiner or examining body can stop the test if the welding conditions are not correct or if it appears that the welder does not have the technical competence to comply to the requirements of this standard, e. In cases where the majority of production work is fillet welding, the welder shall be approved also by an appropriate fillet welding test; e approval for butt welds in pipes without backing includes approval for branch connections within the same range of approval as in tables 3 to 5.
If the circumference is less than mm, additional weld test pieces will be required.
Testing of skill to this standard depends on welding methods in which uniform rules and test conditions are complied with, and standard test pieces are used. This standard is intended to provide the basis for the mutual recognition by examining bodies for approval relating to welders’ competence isoo the various fields of application.
Steels — Part 2: All relevant test conditions shall be recorded on the certificate. In addition to radiography, two bend tests, one face, one root see EN or two fracture tests, one face, one root see EN shall always be applied to butt welds. In some cases a welder approval test on a branch connection can be necessary.
Aluminium and aluminium alloys EN