apply the same guidelines for the qualification of welding procedures as for the qualification of welders, including thicknesses:
7.6.1 General
Except as allowed by Clause 7.2.5, prior to the start of production welding, welding procedure specifications shall be established as specified in Clause 7.6.4 and shall be qualified by the production of welds that are made as specified in Clause 7.7.1 and that meet the applicable destructive testing requirements of Clauses 7.7.2 to 7.7.9 and the applicable nondestructive inspection requirements specified for production welds in Clause 7.11 or 7.15.10, whichever is applicable. The requirements specified for the qualification of welding procedure specifications for joining pipe to pipe shall also apply to qualification of welding procedure specifications for joining pipe to components and components to components. In such cases, the requirements shall be governed by the component nominal wall thickness at the bevel and by the outside diameter of the matching pipe.
7.7 Arc and gas welding — Testing for qualification of welding procedure specifications and qualification of welders