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Section I Welding Question 1

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Guest102023

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I want to weld T11 boiler tube to carbon steel tube, WT = 0.180" or less. I need to know the possible preheat and PWHT reqirements in Section I, which I do not have access to. Thanks.
 
250 F (120 C) per Table PW-39, for P No. 4, General Notes (a)(1)(c).

 
With wall thickness up to 0.165" (max) and max OD of 1.5", preheat is not mandated when buttwelded with the GTAW process per same note.

 

No Preheat is required for this 4.5mm thick
 
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