{"id":3029,"date":"2023-10-10T16:10:16","date_gmt":"2023-10-10T16:10:16","guid":{"rendered":"https:\/\/mewelding.com\/?p=3029"},"modified":"2023-10-11T16:28:39","modified_gmt":"2023-10-11T16:28:39","slug":"welds-with-buttering","status":"publish","type":"post","link":"https:\/\/mewelding.com\/welds-with-buttering\/","title":{"rendered":"Practice Case 15 \u2013 Welds With Buttering"},"content":{"rendered":"\n
Consider the following questions asked in the interpretation IX-16-3.<\/p>\n\n\n\n
\u201cBackground: Company A qualified a WPS joining a P-Number 5A material to itself in accordance with QW-283 by buttering both groove faces using a filler metal that does not conform to an AWS classification but is identified on the PQR by trade name. The buttered ends were postweld heat treated and machined so that the buttered thickness after machining was not less than 3\/16 inch. The buttered ends were then welded together using a different filler metal. The required mechanical tests were performed. Company B qualified a WPS to butter and heat treat the weld ends (but not perform the groove weld assembling the buttered parts) by making a groove weld in P-number 5A material using the same process, filler metal, and heat treatment temperature range that was used for buttering by Company A. The required mechanical tests were performed. <\/p>\n\n\n\n
Question (1): Is it required that the production buttering be made with the same heat of the filler metal that was used for the buttered portion of the procedure qualification test coupon? <\/p>\n\n\n\n
Question (2): Is the company B WPS qualified to butter and heat treat the weld ends of the production parts? <\/p>\n\n\n\n
Question (3): May a third company (Company C) use test coupons that have been buttered, heat treated, and machined by Company A (following a qualified buttering WPS) to qualify a WPS for only making the groove weld joining the buttered parts?\u201d<\/p>\n\n\n\n
For reference, here is what the qualifications done by company A and B look like, in all likelihood.<\/p>\n\n\n\n