ÖNORM EN 288-9

This standard specifies how a welding procedure specification is approved by welding procedure tests for on land and offshore site butt welding of transmission pipelines under normal atmospheric conditions. Tests are carried out in accordance with this standard unless additional tests (e.g. CTOD tests and alt weld metal tensile tests) are specified by the relevant application standard or contract when these apply. This standard defines the conditions for the execution of welding procedure approval tests and the limits of validity of an approved welding procedure for all practical welding operations within the range of variables listed in clause 8. It applies to the arc welding of steels of groups 1, 2 and 3 according to CR 121 87.The principles of this standard can be applied to other fusion welding processes subject to agreement between the contracting parties. The requirernents for welding procedure specification and qualification for hyperbaric and "wet" welding are not covered by this supplementary standard. Arc welding is covered by the following processes in accordance with EN 24063 : 11 1 - metal-arc welding with covered electrode ; 114 - flux-cored wire metal-arc welding without gas shield ; 121 - submerged arc welding with wire electrode ; 131 - metal-arc inert gas welding, MIG - welding ; 135 - metal-arc active gas welding, MAG-welding ; 136 - flux-cored wire metal-arc welding with active gas shield ;