Heat treatment of U-bend in Heat exchangers
Heat treatment of U-bend in Heat exchangers
(OP)
Hi All,
Does anybody know of some reference material for guidance on requirements of heat treatment for U-bent tubes of U-tube heat exchangers?
I am particularly interested in knowing the conditions under which heat treatment of tubes after bending becomes mandatory.
Also, can somebody please let me know whether UCS-79 is applicable to tubes also or does it apply to plates only.
Regards,
Starrproe
Does anybody know of some reference material for guidance on requirements of heat treatment for U-bent tubes of U-tube heat exchangers?
I am particularly interested in knowing the conditions under which heat treatment of tubes after bending becomes mandatory.
Also, can somebody please let me know whether UCS-79 is applicable to tubes also or does it apply to plates only.
Regards,
Starrproe





RE: Heat treatment of U-bend in Heat exchangers
RE: Heat treatment of U-bend in Heat exchangers
RE: Heat treatment of U-bend in Heat exchangers
Re;UCS-79, this does not apply to tubing, only to shells and heads that are formed.
RE: Heat treatment of U-bend in Heat exchangers
RE: Heat treatment of U-bend in Heat exchangers
RE: Heat treatment of U-bend in Heat exchangers
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Plymouth Tube
RE: Heat treatment of U-bend in Heat exchangers
It states that cold formed bends in tubes required heat treatment (excluding for boiler, superheater, reheater and economizer tubes) is required for (a) CS material with a center-line radius < 3.5*OD (b) bends with strain > 5% (where: 100*OD/2R) c) when SCC (stress corrosion cracking) is an issue.
For boiler, superheater, reheater and economizer tubes, it is also covered.