scope:

This Defence Standard specifies the minimum requirements for the welding and fabrication of pipework, machinery and engineering components for HM Submarines and Surface Ships not in Class approved by the Approval Authority. In order to ensure that the maximum benefits are achieved from the material(s) selected by design it is essential that fabrication practices do not compromise the material(s) properties and through-life performance.

This Defence Standard covers the welding and associated heat treatment of any metallic material (although principally designed for steel, nickel alloys, copper alloys and aluminium alloys) in any product form as approved by the Approval Authority.

This Defence Standard is not applicable to nuclear primary and associated circuits, for which reference is to be made to DGS GS 3003 'General Welding Specification for Nuclear Plant and Machinery'.

This Defence Standard is not wholly applicable for sleeve and socket welded joints fabricated at build for submarines for which special contract arrangements have been agreed by MOD. These are covered by a BAE Systems Marine Limited document Specification 9023 'Welding and Fabrication of pipework, machinery and engineering components'.