ASME B31.3 refers ASME Sec.IX for WPS/PQR qualification. PWHT Soak time after Repair will be considered during original PQR qualification and when Charpy Impact tests are required, below snap shot of ASME Sec.IX applies. Normally in Pipe Mill, MPQ (Manufacturer Procedure Qualification) with welding & Heat Treatment will be performed including repair PWHT cycles during pipe production. Thanks & Regards J.Gerald Jayakumar 0091-8838619635 On Thursday, 29 January 2026 at 08:52:28 am IST, Babur Khan <mbabur.bwp@gmail.com> wrote: Greetings, Thank you for your kind response. In pur PQR, soaking time for repairs Welding not considered. Muhammad Babur Khan Sent from my iPhone On 28 Jan 2026, at 8:48 AM, 'james gerald' via Materials & Welding ...
Hello, Dear Expert, I would appreciate your insights on the following question concerning heat input calculations for impact-tested WPS. The Qualification Code is ASME Sec. IX. Yes, there is an impact test. The contractor has submitted the WPS heat input, which is shown in the screenshot below. (The second last and last columns were added by me. Question: How do you calculate heat input? 1. Third Last Column: The contractor recorded the highest heat input from PQR on the WPS as it is. 2. Second Last Column: Heat input is computed by averaging the amperage, voltage, and travel speed. 3. Last Column: The calculation of heat input relies on the maximum amperage, voltage, and travel speed. Which method is the correct one for calculating heat input? Heat Input will be higher than from PQR with available variables. Reference : Table QW-253 Welding Variables Procedure Specifications (WPS) — Shielded Metal-Arc Welding (SMAW) QW-409.1 Increase in heat input shall be consdire essential variabl...