Exchanger Tube thickness question
Exchanger Tube thickness question
(OP)
I am designing an exchanger, and am wanting to compute the minimum tube thickness. Using the Barlow equation:
tm = PDo/{2(SE+PY)} + C
where P = design pressure
SE = allowable stress = 13,200 psi for A213 tubes @ 450°F
Y = .4 for A213 (304L)
My question is what is good value to use for corrosion/erosion allowance, C? Processing syn gas through tubes at 900 psi. Cooling water on shell side.
Any rules of thumb to use?
tm = PDo/{2(SE+PY)} + C
where P = design pressure
SE = allowable stress = 13,200 psi for A213 tubes @ 450°F
Y = .4 for A213 (304L)
My question is what is good value to use for corrosion/erosion allowance, C? Processing syn gas through tubes at 900 psi. Cooling water on shell side.
Any rules of thumb to use?





RE: Exchanger Tube thickness question
According TEMA code, tubes are not required to have corrosion allowance.
Carbon steel parts of shell, heads and tube sheets vary from 1/16" up to 1/8".
lm
RE: Exchanger Tube thickness question
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Exchanger Tube thickness question
Bill
RE: Exchanger Tube thickness question
Bill3752
If the cooling water has more than 50 ppm of chlorides SS TP304L is not a good material choice.
After determination of the minimum thickness and according the corrosivity of your fluids, shell side and tube side, then you have to chose a "safety" BWG to your tubes according TEMA tables.
lm