scope:

This part of ISO 15614 specifies the tests which should be used for qualification of welding procedure specifications. It applies to resistance butt welding and flash welding of metallic materials, e.g. with solid, tubular, flat or circular cross-section. The basic principles of this part of ISO 15614 may be applied to other resistance welding processes when this is specified in the specification. This part of ISO 15614 defines the conditions for carrying out tests and the limits of validity of a qualified welding procedure for all practical welding operations covered by this part of ISO 15614. The tests required to qualify the procedure for a particular component/assembly depend on the performance and quality requirements of the component/assembly and should be defined in the design specification. The tests should be carried out in accordance with this part of ISO 15614, unless more severe tests are specified by the relevant application standard or specification, when these apply. Such tests may include: - microsections; - fatigue or endurance tests; - impact test; - radiographic test; - ultrasonic test; - corrosion test; - tests of components or complete welded assemblies. This part of ISO 15614 covers the following resistance welding processes as defined in ISO 4063: - 24 flash welding, using direct current or alternating current with various movement sequences, constant flashing and pulsed flashing; - 25 resistance butt welding, using direct current or alternating current with various pressure sequences.