Steel Buildings in Europe

Part 7: Model Construction Specification 7 - 25 9 WELDING 9.1 General Welding shall be undertaken in accordance with the requirements of the relevant part of EN ISO 3834 or EN ISO 14554 as applicable. A welding plan shall be provided as part of the production planning required by the relevant part of EN ISO 3834. The content of a welding plan is described in § 7.2.2 of EN 1090-2. Welding may be performed by the welding processes defined in EN ISO 4063, that are listed in § 7.3 of EN 1090-2. 9.2 Qualification of welding procedures Welding shall be carried out with qualified procedures using a Welding Procedure Specification (WPS) in accordance with the relevant part of EN ISO 15609 or EN ISO 14555 or EN ISO 15620. If specified, special deposition conditions for tack welds shall be included in the WPS. Qualifications of welding procedures, depending on welding processes, are described in § 7.4.1.2 and § 7.4.1.3 of EN 1090-2. 9.3 Welders and welding operators Welders shall be qualified in accordance with EN 287-1 and welding operators in accordance with EN 1418. Records of all welder and welding operator qualification tests shall be kept available. 9.4 Welding coordination For Execution Class EXC2, EXC3 and EXC4, welding coordination shall be maintained during the execution of welding by welding coordination personnel suitably qualified for, and experienced in the welding operations they supervise as specified in EN ISO 14731. With respect to the welding operations being supervised, and for structural carbon steels, welding coordination personnel shall have a technical knowledge according to Table 14 of EN 1090-2. 9.5 Preparation and execution of welding Precautions shall be taken to avoid stray arcing, and if stray arcing does occur the surface of the steel shall be lightly ground and checked. Visual checking shall be supplemented by penetrant or magnetic particle testing. Precautions shall be taken to avoid weld spatter. For Execution Class EXC3 and EXC4, it shall be removed.