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This Part of ISO 15614 specifies the tests which can be used for qualification of welding procedure specifications for spot, seam, and projection welding processes.

NOTE The procedures are written for embossed projection welding, they can be adapted for solid projections as well, e.g., nut welding, stud welding. cross wire welding.

This International Standard is Part of the ISO 15614 series. Details of this series are given in ISO 15607, Annex A.

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 shall be established before any qualification is undertaken.

Tests shall be carried out in accordance with this Part of ISO 15614 unless more severe tests are specified by the relevant application standard or contract when these shall apply.

The acceptability of applying the principles of this Part of ISO 15614 to other resistance welding processes should be established before any qualification is undertaken.

NOTE Specific service, material, or manufacturing conditions might require more comprehensive testing than is specified by this Part of ISO 15614.

Such tests can include:

— method for fatigue testing for spot welded joints;

— specimen dimensions and procedure for impact, shear and cross-tension testing resistance spot and projection welds;

— bend test;

— surface crack detection;

— ultrasonic tests and X-ray test;

— chemical analysis and corrosion tests;

— micro examination, including assessment of hot cracking behaviour;

— tests of components or complete welded assemblies.

This Part of ISO 15614 covers the following resistance welding processes, as defined in ISO 4063:

— 21 – resistance spot welding;

— 211 – indirect spot welding;

— 212 – direct spot welding;

— 22 – resistance seam welding;

— 221 – lap seam welding;

— 222 – mash seam welding;

— 225 – foil butt-seam welding;

— 226 – seam welding with strip;

— 23 – projection welding;

— 231 – indirect projection welding;

— 232 – direct projection welding.

This series of standards applies to welding of metallic materials in the manufacture and maintenance of railway vehicles and their components.

This part of the series defines the classification levels as well as the requirements for manufacturers of welded railway vehicles and components during maintenance or maintenance activities.

This part of ISO 15614 specifies tests for the qualification of welding procedure specifications applicable to upset (resistance butt) welding and flash welding of metallic materials, e.g. with solid, tubular, flat or circular cross-section. Its basic principles can also be applied to other resistance welding processes when this is stated 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 the practical welding operations that it covers. The tests required to qualify the procedure for a particular component or assembly depend on the performance and quality requirements of the component or assembly, as defined in the design specification. The tests are intended to be carried out in accordance with the requirements of this part of ISO 15614, unless more severe tests are specified by the relevant application standard or specification and when these apply.

NOTE Specific service, material, or manufacturing conditions can require more comprehensive testing than specified by this part of ISO 15614. Such tests can include microsections, fatigue or endurance tests, impact tests, radiographic testing, ultrasonic testing, corrosion testing and 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 upset welding, using direct current or alternating current with various pressure sequences.