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PWHT of Tube to Tubesheet welding

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engineermat

engineermat

Mechanical
Mar 17, 2008
47
US
If the heat exchange tube side in sour water service (or caustic, amine service, is PWHT required for tube to tube sheet welds?

Thanks.
 
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No, you cannot PWHT the tubesheet + tubes because there is risk of breaking the weld (by the way, breaking the strength of tube expansion also), due to differential expansion of the assembly in the furnace.
Cheers,
gr2vessels
 
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I heard that the manufacturer perform PWHT for Cr-Mo tube to tube sheet welds. Is it true?
 
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