scope:

This part of ISO 15614 specifies how a preliminary weldingprocedure specification for overlay welding is qualified by weldingprocedure tests. This part of ISO 15614 defines the conditions forexecution of welding procedure tests and the range of qualificationfor welding procedures for all practical welding operations withinthe range of variables listed in Clause 8. This part of ISO 15614applies to all welding processes suitable for overlay welding. Insituations where qualification is carried out on a pre-productiontest piece, the qualification is performed in accordance with ISO15613 except that, as far as possible, the testing is according tothis part of ISO 15614. Building up and repair of parent metal iscovered by ISO 15613 or ISO 15614-1. This edition of ISO 15614-7 isapplicable to all new welding procedure qualification tests. Itdoes not invalidate previous welding procedure tests made inaccordance with previous editions of this part of ISO 15614. Whereadditional tests are required by the present edition, it is onlynecessary that those additional tests be carried out on a testpiece made in accordance with the existing WPS and this part of ISO15614. If buttering is used for welding between dissimilarmaterials, the welding procedure is qualified in accordance withISO 15614-1. This buttering may be required for weld combiningdifferent material structure or properties, e.g. joiningmartensitic steels or ferritic steels with austenitic steels.Additional tests may be required by application standards.