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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International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. The certificate shall be issued under the sole responsibility of the examiner or examining body and shall contain all the information detailed in 96066-3 A of EN The approval of the examiner or test body shall be obtained. It is not intended that thicknesses or diameters should be measured precisely iiso rather the general philosophy behind the values given in tables 1 and 2 should be applied.
In some cases a welder approval test on a branch connection can be necessary. The certificate of approval testing is issued under the sole responsibility of the examiner or examining body. When required, visual examination can be supplemented by penetrant see EN or other test methods see table 6.
If the imperfections in the welder’s test piece exceed the permitted maximum specified, then the welder shall isp be approved. The welding position H-L for pipes approves for all pipe angles in production work. The actual questions used should be drawn up by the individual country, but should include questions on areas covered in clause A. Isp standard covers approval testing kso welders for work on semi-finished and finished products made from wrought, forged or cast material types listed in 5.
When transverse bend testing is used, it shall be carried out in accordance with 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. If the circumference is less than mm, additional weld test pieces will be required.
ISO 焊工的认可试验.熔焊.铜及铜合金 – MBA智库文档
Special tests do not have any range of approval, outside the range of tolerances for the test carried out. Preparation and fracture testing of test specimens for a fillet weld on plate 7. For one root fracture or one root transverse bend or one side bend test specimen Position 2: The lso piece can be sectioned by mechanical means discarding the first and the last 25 mm of the test piece at the end of the plates figures 5 and 6.
When macroscopic examination is ios, at least four test specimens shall be taken equally spaced in the inspection length. If it is established that failure is attributed to the welder’s lack of skill, the welder shall be regarded as incapable of complying with the requirements of this standard without further training before re-testing.
The examiner or is 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. An interruption for a period isl longer than six months is permitted; b There is no specific 96063- to question the welder’s skill and knowledge. 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.
Draft International Standards adopted by the Technical Committees are circulated to member bodies for voting.
BS EN ISO – Approval testing of welders. Fusion welding. Copper and copper alloys
When radiographic testing is used, the sio length of the weld see figure 7 a and 7 b in the test piece shall be radiographed in the as-welded condition in accordance with EN using class B technique. For welding position PA or PC, one root and one face bend test specimen shall be tested see figure 7 a.
Preparation and fracture testing of test specimens for a fillet weld on pipe When macroscopic examination in accordance with EN is used, at least four test specimens shall be taken equally spaced around the pipe. One test piece per position. 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.
This date can be different to the date of issue marked on the certificate. The welding of any one material in a group confers approval on the welder for the welding of all other materials within the same group.
BS EN ISO 9606-3:1999
The welding processes referred to in this standard include those fusion welding processes which are designated as manual or partly mechanized welding. The test weld can be used to approve a welding procedure and a welder provided that all the relevant requirements, e.
In addition, the requirements for mechanical tests are indicated. The practical test and the examination of job knowledge see Annex A shall be designated by ”Accepted” or ”Not tested”. Macroscopic tests shall be carried out in accordance with EN 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.
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. Each member body interested in a subject for which a technical sio has been established has the right to be represented on that committee. Steels — Part 2: The acceptance requirements for imperfections found by test methods according to this standard shall, unless isi specified, be assessed following EN If the welder fails any of the prescribed tests, no certificate shall be issued.
A change of process requires a new approval test. However, some countries can require that the welder undergoes a test of job knowledge. During the approval test the welder should be required to show adequate practical experience and job knowledge test non mandatory of the welding processes, materials and safety 960-63 for which he is to be approved; information on these aspects is given in Annex A.