Tube side corrosion allowance of heat exchanger
Tube side corrosion allowance of heat exchanger
(OP)
In a shell and tube heat exchanger, the thickness of tubes is 2.150mm, but the tube side corrosion allowance is 3.000mm. So I am a little confused now. Could anyone explain it? Thank you very much.





RE: Tube side corrosion allowance of heat exchanger
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdoweb/
RE: Tube side corrosion allowance of heat exchanger
cheers,
gr2vessels
RE: Tube side corrosion allowance of heat exchanger
RE: Tube side corrosion allowance of heat exchanger
RE: Tube side corrosion allowance of heat exchanger
1) Tubes
2) Pass partition plates
3) Flange gasket faces
4) Cage (baffles, tie rods & spacers)
5) Floating head cover bolting
6) Split key rings (TEMA "S" type exchangers)
Tundle replacement is generally determined by UT examination of the tubes (IRIS inspection/Ferroscope).
-Christine
RE: Tube side corrosion allowance of heat exchanger
Would you be kind to advise what Code are you using for the design of these heat exchangers (refer to your previous posts regarding the same topic of tubes corrosion).
Cheers,
gr2vessels
RE: Tube side corrosion allowance of heat exchanger
RE: Tube side corrosion allowance of heat exchanger
In page 25 of TEMA 1999 Tubular Heat Exchangers, I found these items as follow:
RCB-1.517 TUBES,BOLTING AND FLOATING HEAD BACKING DEVICES
tubes,bolting and floating head backing devices are not required to have corrosion allowance.
RCB-1.518 PASS PARTITION PLATES
Pass partition plates are not required to have corrosion allowance.
RCB-1.52 ALLOY PARTS
Alloy parts are not required to have corrosion allowance.
So I have some questions. 1."Alloy parts" mean they are made of stainless steel? 2. Do tubes have design life? And how can I find the design life in the design document?