This document specifies how a preliminary welding procedure specification (pWPS) is qualified by welding procedure tests. This document applies to production welding, repair welding and build-up welding. This document 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. This document applies to the arc welding of wrought and cast aluminium and its alloys. In this document the term aluminium stands for aluminium and for aluminium alloys. This document does not apply to finishing welding of aluminium castings, which is addressed in ISO 15614-4. Arc welding of aluminium is covered by the following welding processes in accordance with ISO 4063:2023: 131 — MIG welding with solid wire electrode; 141 — TIG welding with solid filler material (wire/rod); 142 — Autogenous TIG welding; 15 — plasma arc welding.