ISO 15612:2004 gives the information necessary to explain the requirements referenced in ISO 15607 about qualification by adoption of a standard welding procedure, and establishes the conditions, limits and ranges of qualification necessary for the use of a standard welding procedure. This International Standard gives the manufacturer the possibility of using welding procedures based on welding procedure tests performed by other organisations. The use of ISO 15612:2004 can be restricted by an application standard or a specification.