Dear Rajesh,
Please consider slow heating / cooling cycles.
With Best Regards,
On Monday, 19 May 2014 4:15 AM, Rajesh <mrinmeghnsk@gmail.com> wrote:
Dear All,
We are constructing an heat exchanger which has fixed tubesheet welded to shell.
Shell Material SA 516 Gr 70
Tube Material - Cu Ni 90:10
Tubesheet - SA 266 claded with CU Ni 90:10
Customer is demanding PWHT for complete heat exchanger due to process. But we have fear for failure of tube bundle after PWHT due to differential thermal expansion.
Please comment if CODE has any reference to this?
Rajesh
-- We are constructing an heat exchanger which has fixed tubesheet welded to shell.
Shell Material SA 516 Gr 70
Tube Material - Cu Ni 90:10
Tubesheet - SA 266 claded with CU Ni 90:10
Customer is demanding PWHT for complete heat exchanger due to process. But we have fear for failure of tube bundle after PWHT due to differential thermal expansion.
Please comment if CODE has any reference to this?
Rajesh
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