AISI 316L expanded rolled into carbon steel tube sheet exchangers
AISI 316L expanded rolled into carbon steel tube sheet exchangers
(OP)
In high temperature vacuum crude residuum services to resist against Naphtenic corrosion is it correct to have austenitic steel tubes such as AISI 316L expanded rolled into carbon steel tube sheet exchangers? Shell side we have vacuum bottoms residuum, tube side we have steam.
Regards
Luis
Regards
Luis





RE: AISI 316L expanded rolled into carbon steel tube sheet exchangers
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RE: AISI 316L expanded rolled into carbon steel tube sheet exchangers
Tank you
Regards
Luis Marques
RE: AISI 316L expanded rolled into carbon steel tube sheet exchangers
If your question is regarding whether rolling is OK for the service, then it is not objectionable to have fully rolled expanded joint (So long as Appendix A is properly addressed).
RE: AISI 316L expanded rolled into carbon steel tube sheet exchangers
You should consider the difference in expansion between the SS tubes and the CS shell....
I do not know the rule of thumb, but if the SS tube expansion is excessive ( long tubes and/or large temperature cycles) the tubes may "unseat" themselves and you will have continual leaks/repairs
Consult a HX fabricator for the design limits....
-MJC