thickness of pressure vessel
thickness of pressure vessel
(OP)
hello
i have designed a pressure vessel with the following inputs -
design pressure - 25.38 psi
design temperture - 40 degree celcius
corrosion allowance - 0.05 inch
diameter - 83 inches
all material is of carbon steel so i have taken allowable stress as 12900 psi
joint efficiency - 0.7
i have used the formula t = ((P*R)/(S*E-0.6*P))+C for designing the shell thickness and after designing i have taken shell thickness as 6mm or 0.236 inches.
i have used ellipsoidal head thickness formula as t=((P*D)/(2*S*E-0.2*P)+C and after designing i have taken the head thickness also as 6mm.
please just review the thickness calculation and let me know if i am correct so that i can proceed further.
i have designed a pressure vessel with the following inputs -
design pressure - 25.38 psi
design temperture - 40 degree celcius
corrosion allowance - 0.05 inch
diameter - 83 inches
all material is of carbon steel so i have taken allowable stress as 12900 psi
joint efficiency - 0.7
i have used the formula t = ((P*R)/(S*E-0.6*P))+C for designing the shell thickness and after designing i have taken shell thickness as 6mm or 0.236 inches.
i have used ellipsoidal head thickness formula as t=((P*D)/(2*S*E-0.2*P)+C and after designing i have taken the head thickness also as 6mm.
please just review the thickness calculation and let me know if i am correct so that i can proceed further.





RE: thickness of pressure vessel
First you need to determine the applicable Code of Construction. Based on your calculation, it would appear that you are using ASME Section VIII, Division 1. You need to follow ALL of the Code in order to calculate a thickness. One or two simple calculations are a good start but inadequate.
Second, you need to specify the ACTUAL material used. You can't just pluck an allowable stress out of mid-air. You need to have it properly referenced to an allowable stress table. Where you get your allowable stress depends wholly on the Code of Construction (see above).
RE: thickness of pressure vessel
Could you please tell me what is wrong in my calculation and also what additional factors i need to consider to find the shell and head thickness.
RE: thickness of pressure vessel
Better get some real help.
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand