Nov 12, 2008 #1 engineermat Mechanical Joined Mar 17, 2008 Messages 47 Location 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.
If the heat exchange tube side in sour water service (or caustic, amine service, is PWHT required for tube to tube sheet welds? Thanks.
Nov 12, 2008 #2 gr2vessels Mechanical Joined Sep 29, 2004 Messages 1,971 Location AU 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 Upvote 0 Downvote
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
Nov 12, 2008 Thread starter #3 engineermat Mechanical Joined Mar 17, 2008 Messages 47 Location US I heard that the manufacturer perform PWHT for Cr-Mo tube to tube sheet welds. Is it true? Upvote 0 Downvote
Nov 14, 2008 #4 chicopee Mechanical Joined Feb 15, 2003 Messages 6,199 Location US May be localized PWHT!!! Upvote 0 Downvote