Clearance between shell and Baffle per TEMA Table RCB-4.3
Clearance between shell and Baffle per TEMA Table RCB-4.3
(OP)
Dear All,
Inner diameter of heat exchanger shell is 438mm and diameter of baffle is not specified on the drawing.
Therefore clearance between shell and transverse baffle can not calculate. Moreover, 438 mm Shell ID is neither in range of 152-432 nor in 457-991 of below Table RCB-4.3 of TEMA.
.
Please advise what will be the clearance between shell and transverse baffle according to TEMA.
Regards,
Ijaz
Inner diameter of heat exchanger shell is 438mm and diameter of baffle is not specified on the drawing.
Therefore clearance between shell and transverse baffle can not calculate. Moreover, 438 mm Shell ID is neither in range of 152-432 nor in 457-991 of below Table RCB-4.3 of TEMA.

Please advise what will be the clearance between shell and transverse baffle according to TEMA.
Regards,
Ijaz
RE: Clearance between shell and Baffle per TEMA Table RCB-4.3
438 mm - 3.2 mm = 434.8 mm (17 1/8 inches).
-Christine
RE: Clearance between shell and Baffle per TEMA Table RCB-4.3
The column is nominal size.
C74 is on the money with her interpretation of this.
Though I know of some people that would say that using 18" nominal for the shell size is also acceptable.
Then once that tells you that you need 3.2mm of diametral clearance you apply that to your actual shell design ID.
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P.E. Metallurgy, consulting work welcomed
RE: Clearance between shell and Baffle per TEMA Table RCB-4.3
However, can anyone share real example i.e. heat exchanger currently in operation.
Regards,
Ijaz
RE: Clearance between shell and Baffle per TEMA Table RCB-4.3
So you would allow 1/4" total clearance.
When you look at the actual design you see that the OD is 58.5" and the wall is 1.875" so the design ID is 54.75".
So the baffle size is 54.75 - 0.25" = 54.5"
I have seen them go the other way also. Say 75" nominal OD x 2.5" wall giving a nominal ID of 70".
The clearance would be 0.375".
The detail design shows 74.5" OD x 2.625" wall giving a 69.25" design ID.
And a baffle diameter of 69.25-0.375" = 68.875"
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P.E. Metallurgy, consulting work welcomed
RE: Clearance between shell and Baffle per TEMA Table RCB-4.3
-Christine
RE: Clearance between shell and Baffle per TEMA Table RCB-4.3
RE: Clearance between shell and Baffle per TEMA Table RCB-4.3
You need to ask what is intended.
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P.E. Metallurgy, consulting work welcomed