D1.1 die post diameters
D1.1 die post diameters
(OP)
What size die post should be used for testing 1/4" thick A36 plate per D1.1 for performance quals? I know the limited test plate diagrams only show 3/8" thick plate and Table 4.11 doesn't offer anything thinner than 3/8". Although Table 4.2 allows for procedure quals less than 3/8" thick. Is it to be understood that testing plate thicknesses less than 3/8" is not allowed for performance quals? One would think face and root bends would be tested around a 1" (4t) diameter die post for 1/4" thick plate. But there are no provisions (nomographs, charts or formulas) to determine this die post size, you are only lead to 1-1/2" diameter.
Yet if you go to Section 9, Table 9.14 allows for the testing of pipe/tube test coupons with wall thicknesses less than 3/8" thick. Section 9 sends you back to Section 4 for your dies post size. So then if a welder tested on 6" sch 40 (.280" wall) per the code you would test his face and roots on am 1-1/2" diameter die post? That seems rather generous.
Am I missing something?
Yet if you go to Section 9, Table 9.14 allows for the testing of pipe/tube test coupons with wall thicknesses less than 3/8" thick. Section 9 sends you back to Section 4 for your dies post size. So then if a welder tested on 6" sch 40 (.280" wall) per the code you would test his face and roots on am 1-1/2" diameter die post? That seems rather generous.
Am I missing something?
RE: D1.1 die post diameters
One could use AWS B2.1 as an alternate to the requirements of AWS D1.1 with the Engineer's (representing the Owner) approval. AWS B2.1 provides information regarding the require bend diameter for all thicknesses of base metal.
Best regards - Al
RE: D1.1 die post diameters
Which is the first steps towards losing the whole qualification process integrity.
Just do it right the first time, and don't try to game the system.