Hi Al, you can bet all your wealth:
, API 653 will allow it.
11.1 Welding Qualifications
11.1.1 Welding procedure specifications (WPSs) and welders and welding operators shall be qualified in
accordance with Section IX of the ASME Code, the additional requirements of API 650, Section 9, and this standard.
Welding procedures for ladder and platform assemblies, handrails, stairways, and other miscellaneous assemblies,
but not their attachments to the tank, shall comply with either AWS D1.1, AWS D1.6, or Section IX of the ASME Code,
including the use of SWPSs.