BV船级社规范.doc

——————————————————————————————————————————————— BV船级社规范 NR 216Chapter 5 WELDING SECTION 1 2SECTION SECTION 3 4SECTION SECTION5GENERAL REQUIREMENTSAPPROVAL OF WELDING CONSUMABLES APPROVAL OF OVER WELDABLE SHOP PRIMERSAPPROVAL OF WELDING PROCEDURESAPPROVAL OF CO2 LASER WELDING PROCEDURESApril 2005Bureau Veritas177 178Bureau VeritasApril 2005 NR 216, Ch 5, Sec 1 SECTION 1GENERAL REQUIREMENTS 1 1.1 Scope General 2.2.3 Welders and welding operators Welders for manual welding and for semiautomatic weldingprocesses are to be properly trained and are to be certifiedby the Society, as required in the individual applications,unless otherwise agreed. Welders are to be certified according to the proceduresgiven in the document NR476 “Approval testing of weld-ers”, except for offshore applications where the Society’sRule Note “Construction survey of steel structures of off-shore units and installations” referenced NR426 DTO R00 Edated May 1992 is to be used. The certification is to be in due course of validity. Personnel manning the automatic welding machines are tobe competent and sufficiently trained.2.2.4 Welding supervision Welders are to be supervised and assisted, in the course ofthe welding operation, by an adequate number of compe-tent supervisors, such as to ensure efficient control of thewelding production. Certification of the welding inspectors is not compulsoryand is left to the discretion of the Manufacturer, except inparticular cases where it may be required by the Society.2.2.5 NDT operators Non-destructive tests are to be carried out by qualified per-sonnel certified by the Society or by recognised bodies incompliance with appropriate standards. The qualifications are to be appropriate to the particularapplication. 1.1.1 This Section specifies the general requirements forfabrication by welding, and the other Sections of the Chap-ter concern the requirements for a