This document contains calculations for determining the required thickness and maximum allowable pressure for a cylindrical pressure vessel based on ASME code requirements. It provides the dimensions, material properties, and calculations for a vessel with an outside diameter of 133.937 inches, wall thickness of 0.748 inches, and length of 951.496 inches made of SA-612 material. The minimum required thickness is calculated as 0.721 inches and the maximum allowable pressure is 259 psi, both of which meet the design requirements.

1. 1
2
3
45
Pressure Vessel Engineering Ltd.
Finite Element Analysis  ASME Code Calculations
Canadian Vessel Registration  Vessel Modeling and Drafting
Pipe and Shell Design Tool 6 ver E4.01 Page 1 of 1
7 Cuerpo Cilíndrico - Solución 2
Description
8 Dimensions:
9 133,937 Do [in] - outside diameter
10 0,748 t [in] - nominal wall thickness
11 951,496 L [in] -length
12 0,000 Corr [in] - corrosion allowance
13 Material and Conditions:
14 SA-612 Material
15 23.100 S [psi] - allowable stress
16 1,00 El - long seam efficiency (circ stress)
17 1,00 Ec - circ seam efficiency (long stress)
18 0,0% UTP [%] - undertolerance allowance
19 250,0 P [psi] - interior pressure
20 Calculated Properties:
21 Volume [cuft] = ((Do/2-t)^2)*pi()*L/1728 ((133,937/2-0,748)^2)*PI()*951,496/1728 = 7585,74
22 Weight [lb] = (Do-t)*pi()*L*t*40.84/144 (133,937-0,748)*PI()*951,496*0,748*40.84/144 = 84463,34
23 Variables:
24 UT [in] = t*UTP 0,748*0 = 0,000
25 nt [in] = t-Corr-UT 0,748-0-0 = 0,748
26 Ri [in] = Do/2-nt 133,937/2-0,748 = 66,220
Required Thickness: UG-27(c)(1,2)
t
Do
Length
Long Seam 27 28 ta [in] = P*Ri/(S*El-0.6*P) ~~ long sem 250*66,22/(23100*1-0.6*250) = 0,721
29 tb [in] = P*Ri/(2*S*Ec+0.4*P) ~~ circ seam 250*66,22/(2*23100*1+0.4*250) = 0,358
30 Treq [in] = MAX(ta,tb)+Corr ~~ required minimum thickness MAX(0,721,0,358)+0 = 0,721
31 CheckTreq = Treq <= nt 0,721 <= 0,748 = Acceptable
32 Maximum Pressure: UG-27(c)(1,2)
33 Pint1 [psi] = (S*El*nt)/(Ri+0.6*nt)
(23100*1*0,748)/(66,22+0.6*0,748) = 259
34 Pint2 [psi] = (2*S*Ec*nt)/(Ri-0.4*nt) (2*23100*1*0,748)/(66,22-0.4*0,748) = 524
35 PMax [psi] = Min(Pint1,Pint2) ~~ maximum allowed design pressure MIN(259,524) = 259,2
36 CheckP = PMax >= P 259,2 >= 250 = Acceptable
37 Treq provides a worst case required thickness for nozzle analysis for a nozzle located on the long seam or circ seam
38 This sheet will not calculate thick walled vessels Check →
39 The UG-16(b) minimum thickness requirement has not been taken into consideration here.
40 This sheet cannot be used to check for allowable exterior pressure loads.
41 Use the Weld Efficiency program to calculate El and Ec
42 This sheet is for educational use only - use at your own risk.
43
44
45
46
Not a thick walled vessel, calculations are valid
Pressure Vessel Engineering Ltd.
120 Randall Drive, Suite B
Waterloo, Ontario, Canada, N2V 1C6
www.pveng.com (519) 880-9808