T22 U bend heat treatment
T22 U bend heat treatment
(OP)
ASME code does not require T22 tube bends to be post bend stress relieved.
However, what is the industry practice? Should T22 material bends be stress relieved to reduce possibility of cracking or corrosion. Or perhaps these are non-issues with this type of material?
Thanks,
Alex
However, what is the industry practice? Should T22 material bends be stress relieved to reduce possibility of cracking or corrosion. Or perhaps these are non-issues with this type of material?
Thanks,
Alex





RE: T22 U bend heat treatment
For steam conditions in a boiler reheater or superheater, I don't see any benefit in performing a post bend stress relief.
RE: T22 U bend heat treatment
In this application, the water conductivity is low (ie. 0.25 microseimens)so . Exhaust gas is based on combusted natural gas with no sulfur.
Thanks,
Alex
RE: T22 U bend heat treatment
= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: T22 U bend heat treatment
You must be thinking of T91 material. You really cannot screw up the heat treatment of this material unless the stress relief temperature gets away, and you re-austenitize (1600 deg F) and quench. The T22 tube materials are very forgiving, and are commonly stress relieved after welding attachments during fabrication of tube assemblies.