{"id":3033,"date":"2023-10-10T16:27:58","date_gmt":"2023-10-10T16:27:58","guid":{"rendered":"https:\/\/mewelding.com\/?p=3033"},"modified":"2023-10-11T16:43:45","modified_gmt":"2023-10-11T16:43:45","slug":"wps-for-buttering","status":"publish","type":"post","link":"https:\/\/mewelding.com\/wps-for-buttering\/","title":{"rendered":"Practice Case 16 \u2013 WPS For Welds With Buttering"},"content":{"rendered":"\n
Consider the following questions asked in the interpretation IX-16-48.<\/p>\n\n\n\n
\u2018Background: Company A qualified a WPS to join an unlisted base metal (similar to P-Number 5A Group 1) 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 WPS and 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 minimum buttering thickness in all cases listed will be greater than 3\/I6 inch. The buttered ends were then welded together using a different filler metal and postweld heat treatment was not performed on the completed groove weld. The required mechanical tests were performed in accordance with QW-202.2(a). Notch toughness testing and hardness limits are required by the applicable Code for the heat affected zone and deposited weld metal. The maximum heat input qualified by Company A for buttering the groove faces was 25,000 J\/in. and for welding the groove weld was 65,000 J\/in.<\/p>\n\n\n\n
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 the same unlisted base metal using the same process, filler metal, and heat treatment temperature range that was used for buttering by Company A. The maximum heat input qualified by Company B for buttering is less than the maximum heat input qualified by Company A for the buttering and the groove weld.<\/p>\n\n\n\n
Company C 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 the same unlisted base metal using the same process, filler metal, and heat treatment temperature range that was used for buttering by Company A. The maximum heat input qualified by Company C for buttering is greater than the maximum heat input qualified by Company A for the buttering, but less than the maximum heat input qualified by Company A for the groove weld.<\/p>\n\n\n\n
Question: Is Company A\u2019s WPS qualified to perform the groove weld for buttered parts produced by Companies B and C for any heat input up to the maximum heat input of Company A\u2019s WPS?\u2019<\/p>\n\n\n\n
Here is a pictorial representation of the qualifications done by company A, B, & C.<\/p>\n\n\n\n