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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The macroscopic specimen shall be prepared and etched on one side to clearly reveal the weld see ENpolishing is not required. The actual tests of a welder’s job knowledge can be given by any of the following methods or combinations of these methods: When the filler metal is dissimilar to the parent metal group, an approval for that combination of parent metal group and filler metal is needed, except when permitted by table 4.
One root fracture test specimen and one face fracture test specimen shall be tested. When welding parent metals from two different groups which do not give approval to each other according to table 4 see 6. Fusion welded butt joints in steel plates thicker than 50 mm and 9606- to and including mm in thickness EN Each test specimen shall be positioned for breaking as shown in figure 6b, and examined after fracture.
The certificate of approval testing is issued under the sole responsibility of the examiner or examining body. Owing to different training programmes in various countries, it is only proposed to standardize general objectives or categories of job knowledge. Preparation and fracture testing of test specimens for a fillet weld on plate 7. A minimum weld length of mm is required, but not more than three test pieces. 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.
For any copper alloy not covered by any of the copper groups the welder shall carry out an approval test, which only approves for that copper. The specimen preparation, types of notch profiles and methods of fracture shall be in accordance with EN When transverse bend testing is used, it shall be carried out in accordance with EN The term ”copper” stands for copper and weldable copper alloys.
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 iao technical competence to comply to the requirements sio this standard, e. Dimensions of test piece for fillet weld s on plate Dimensions in millimetres Figure 3: These normative references are cited at the appropriate places in the text and the publications are listed hereafter. If any other form of welder’s approval test certificate kso used, it shall contain the information required in Annex A of EN 906-3 Throughout the text of this standard, read ” 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 However, it is possible for a welder to be approved for more than one welding process by a single test or by ido separate approval tests to be used to cover a multi-process joint.
A test is listed for each of the ranges of plate thickness and pipe wall thickness or pipe diameter as specified in tables 1 and 2. The practical test and the examination of job knowledge see Annex A shall be designated by ”Accepted” or ”Not tested”.
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. This European Standard shall ios given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by Augustand conflicting national standards shall be withdrawn at the latest by August This standard covers approval testing of welders for work on semi-finished and finished products made from wrought, forged or cast material types listed in 5.
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. The welder’s approval test shall be carried out on test pieces lso is independent of the type of construction.
ISO – Approval testing of welders — Fusion welding — Part 3: Copper and copper alloys
However, some countries can require that the welder undergoes a test of job knowledge. If the circumference is less than mm, additional weld test pieces will be required. Special tests do not have any range of approval, outside the range of tolerances for the test carried out.
This standard is intended to provide the basis for the mutual recognition by examining bodies for approval relating to welders’ competence in the various fields of application.
If the imperfections in the welder’s test piece exceed the permitted maximum specified, then the welder shall not be approved. This annex outlines the job knowledge that a welder should have to ensure that procedures are followed and common practices are complied with. This standard is applicable when the welder’s approval testing is required by the purchaser, by inspection authorities or by other organizations.
ISO 焊工的认可试验.熔焊.铜及铜合金 – MBA智库文档
PA Details of the weld type: Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. The job knowledge indicated in this isl is only pitched at the most basic level.
Steels — Part 2: The welder’s approval test certificate shall be issued at least in one of the official CEN languages English, French, German. For a branch weld the range of approval is based on the diameter of the branch; f in cases where the majority of production work is predominantly branch welding or involves a complex branch connection, the welder should receive special training. Aluminium and aluminium alloys — Part 3: Each change of the essential variables for the approval testing beyond the permitted ios requires a new test and a new approval certificate.
It is not intended that thicknesses or diameters should be measured precisely but rather the general philosophy behind the values given in tables 1 and 2 should be applied.
BS EN ISO 9606-3:1999
Dimensions of test piece for a fillet weld on pipe 7. International organizations, governmental and non-governmental, in liaison with ISO, 966-3 take part in the work.
The actual questions used should be drawn up by the individual country, but should include questions on areas covered in clause A. The test pieces shall be marked with the identification of the examiner and the welder before welding starts. Material groups according to CR 5. ISO consists of the following parts, under the general title Approval testing of welders — Fusion welding: Each criterion is considered to be a significant factor in the approval testing.