This part applies to welding that is part of any high pressure piping work, except where the welding is regulated by other codes or Minnesota state regulatory bodies, such as the Power Boiler and Unfired Pressure Vessel sections of the ASME Boiler and Pressure Vessel Code.
For purposes of this chapter, "ASME section IX" means the 2017 edition of section IX of the Boiler and Pressure Vessel Code, as approved and published by ASME, Two Park Avenue, New York, New York 10016. ASME section IX is incorporated by reference and made a part of this chapter. ASME section IX is not subject to frequent change. A copy of ASME section IX is available in the office of the commissioner of labor and industry and at the State Law Library, 25 Rev. Dr. Martin Luther King Jr. Blvd., Saint Paul, Minnesota 55155.
Standard qualifications for welding procedures, welders, and welding operators made according to ASME section IX qualify for work under this part.
Welders and welding operators must meet the standard requirements for initial welder qualification, welder continuity requirements, and retest and renewal requirements, as set forth in ASME section IX.
No welding may be performed on high pressure piping systems without a welding procedure specification and an associated procedure qualification record. Welding performed on high pressure piping systems must be performed using only welders properly qualified according to the welding procedure. All welding procedures must meet the requirements of ASME section IX.
The welding procedure specification and procedure qualification record must be objectively evaluated by and acceptable to the administrative authority.
Welding performed on high pressure piping systems must be supported by the mandatory documents of the welding procedure specification, welding procedure qualification, and procedure qualification record. These documents must be available at the work site.
A welder qualified for a project must be assigned an identification symbol unique to that welder. Each weld must be stamped or marked with the welder's identification symbol. A welding log must be maintained as set forth in ASME section IX.
The contractor is responsible for establishing and retaining the needed documents to conform to the requirements of this part.
MS s 326B.925
34 SR 145; 39 SR 1343; 42 SR 1423
May 15, 2018