ISO 15614-1:2017 specifies how a preliminary welding procedure specification is qualified by welding procedure tests.

ISO 15614-1:2017 applies to production welding, repair welding and build-up welding.

ISO 15614-1:2017 defines the conditions for the execution of welding procedure tests and the range of qualification for welding procedures for all practical welding operations within the qualification of this document.

The primary purpose of welding procedure qualification is to demonstrate that the joining process proposed for construction is capable of producing joints having the required mechanical properties for the intended application.

Two levels of welding procedure tests are given in order to permit application to a wide range of welded fabrication. They are designated by levels 1 and 2. In level 2, the extent of testing is greater and the ranges of qualification are more restrictive than in level 1.

Procedure tests carried out to level 2 automatically qualify for level 1 requirements, but not vice-versa.

When no level is specified in a contract or application standard, all the requirements of level 2 apply.

ISO 15614-1:2017 applies to the arc and gas welding of steels in all product forms and the arc welding of nickel and nickel alloys in all product forms.