3 replies to this topic

[Bill B]

I am designing a heat exchanger and needing to estimate the minimum tube thickness (A-213 tubes, 304L). Using the Barlow equation, at 1200 psi / 450°F design, and an allowable stress of 13,200 psi, I have estimated the min thickness to be .033", plus any allowance for erosion.

Is there a rule of thumb I should use? We are processing syn gas through the tubes, CW on shell.

[djack77494]

Normal practice is to have NO erosion/corrosion allowance on heat exchanger tubes. This would be even more true for stainless steel tubes.

[Bill B]

Normal practice is to have NO erosion/corrosion allowance on heat exchanger tubes. This would be even more true for stainless steel tubes.

Thanks for the input. I will proceed with no allowance. I will try to come up with vibration analysis equations and check my "minimum" tube thickness vs. that number. Bill

[kuldeepd]

http://www.processca..._Exchanger.aspx

hope this helps.

regards
KD