PWHT on air cooler
PWHT on air cooler
(OP)
in the air cooler heat exchanger we have to doing PWHT on header but i have to weld tube to tube sheet (strength or seal weld)and as you know we shan't done any welding after pwht. Please guide me ho to solve this problem.





RE: PWHT on air cooler
RE: PWHT on air cooler
the material of plate is carbon steel sa 516 70 (thk 34 )
the material of tubes are sa-179
and per API 661 we shall be doing PWHT on headers .
RE: PWHT on air cooler
RE: PWHT on air cooler
Headers can be PWHT separately and then assembled with tubes.
API 661 requires PWHT of headers and not tube to tube sheet welds
RE: PWHT on air cooler
but in the shell and tube heat exchanger that we require pwht and tube to tube sheet joint is "seal or strength" weld , i don't know what am i doing. please guide me for this problem.
best regards
RE: PWHT on air cooler
RE: PWHT on air cooler