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  • Users: KenHutch
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  1. KenHutch

    Recovering from PWHT Over Heat above Lower Critical Temp on P5A to P4 (1.25%) Chrome Weld

    As the saying goes - Long time reader - first time poster. Problem - ASME Code B31.1 - New 12" Main Steam Stop SA-182 F22 Valve (P5A) welded into old 12" SA-335 P11 Main Steam Pipe (P4 1.25% Chrome) using WPS qualified with PWHT at 1350 F. Weld Checklist (Traveler) specified 1275 +25/-0 F...

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