I have understanding that AWS B2.1 is a general standard to qualify welding procedures and can be applied to a wide range of welding processes, materials and filler metals, but does not specify whether the WPS can be used for any type of structure or has a limitation on the type of structure to be welded. It's part of my question.
The other hand, I need to splice structural tube thickness of 2.5 mm (tube 120x60x2.5 mm) and butt weld in 1G position, and the client requests a qualified procedure that complies with AWS D1.1, but agree with table 4.2 (AWS D1.1-2004) (expect no change in the latest version) I can only test plates 1/8 to 3/8 inch. therefore, I can not make the specimen with a thickness of 2.5 mm, and if I perform the test on a plate of 3 mm (1/8 inch), the range would be qualified for 3 to 6 mm, so I can not qualify under AWS D1.1. Do not I have clear whether the welding to splice structural tube in thickness less than 3 mm is outside the scope of D1.1?
The thickness range you describe is less than that covered by D1.1, however, the Engineer (representing the owner) has the authority (under D1.1) to accept unlisted materials, thickness ranges, welding procedures qualified to a different welding standard, alternate acceptance criteria, ect.
Check your project specifications to verify which edition of D1.1 is applicable. To assume there are no changes from one edition to the next is a serious mistake that can cost the owner large sums of money.
Best regards - Al
thank you very much for your comments,
best regards