This Standard specifies materials, welding consumables, welding processes, weld preparations, qualifications of welding procedures and personnel, and fabrication and inspection requirements for the welding of pipelines in construction and in maintenance operations.The Standard applies specifically to the welding of pipelines complying with AS 2885.This Clause is applicable to the welding of joints in or on pipes or other pressure-retaining components and connections to apparatus or equipment used in mainline or station pipework whether welded in situ or in prefabricated assemblies.Where station pipework is designed in accordance with another Standard, the welding shall be as specified in that Standard.It is not intended that this Standard be applied to the following:(a) Longitudinal welds or spiral welds made during the manufacture of a pipe.(b) Welds made by the manufacturer during fabrication of a component (see Clause 1.5.5 for the definition of a component) other than the pipe, provided that such welds are in accordance with an approved Standard.(c) Underwater welding.(d) Hyperbaric welding.Also, it is not intended that this Standard be applied retrospectively to existing installations. It is intended that welding procedures complying with and welders who are qualified in accordance with the appropriate previous editions of this Standard may continue to be used for the maintenance of existing installations. New welding procedures and new welding qualifications should be qualified in accordance with this Standard.