Shell Under Internal Pr/ / Dt. 17/07/2010 Source Description MOC THICKNESS OF SHELL Shell side Design Pressure 39.78 P = 566 Psi Inside Radius of shell 625 mm R = 24.61 In Wall Thickness of Shell 16 mm = 0.63 In Wall Thickness of Dish 18 mm td = 0.71 in Max Allowable stress for Shell Material SS 304 L S 20000 Psi Max Allowable stress for Dish Material SS 304 L S 20000 Psi Crown Radius 1250 L = 49.21 In Knuckle Radius 125 r = 4.92 In Joint Efficiency Dish Ed = 1.00 Joint Efficiency Shell Es = 1.00 Longitudinal Stress Calculated Thickness of Shell ts = (P*R)/((2*S*E)+(0.4*P)) ts = 0.35 In ts = 8.79 mm Cicumferential StresCalculated Thickness of Shell ts = (P*R)/((S*E)-(0.6*P)) ts = 0.71 In ts = 17.99 mm Add Corrosion Allowance 1.50 Thickness of Shell with corrosion allowance 19.49 Calculated Thickness is 19.49 mm We are using 16 mm Increase Thickness of Shell THICKNESS OF DISH TORISPHERICAL = 1.24 In Calculated Thickness of Dish = 31.38 mm Add Thinning Allowances 3.14 mm Add Corrosion Allowances 1.50 mm Noiminal Thickness of Dish 36.02 mm Calculated Thickness of Dish 36.02 mm We are using 18 mm Increase Thickness of Dish THICKNESS OF DISH ELLIPSOIDAL = 0.70 In Calculated Thickness of Dish = 17.73 mm Add Thinning Allowances 1.77 mm Add Corrosion Allowances 1.50 mm Noiminal Thickness of Dish 21.00 mm Calculated Thickness of Dish 21.00 mm We are using 18 mm Increase Thickness of Dish Shell Under External Pr// Dt. 17/07/2010 Source Description MOC THICKNESS OF SHELL Shell External Pressure 4.3 P = 61 Psi Outside Diameter of shell 1282 mm Do = 50.47 In Shell Thickness 8 mm ts = 0.31 in Dish Thickness 16 mm td = 0.63 in Dish SF 40 mm = 1.57 in Max Allowable stress for Shell Material SS 304 L S 15800 Psi Max Allowable stress for Dish Material SS 304 L S 15800 Psi Crown Radius 1282 L = 50.47 In Joint Efficiency Dish Ed = 1.00 Dish Depth 336.4 mm h = 13.24 in Unsupported Length of Shell 150 mm L = 5.91 in L/Do = 0.12 Do/t = 160.25 If Do/t >= 10 From Fig G using L/Do and Do/t A = 0.01 From Fig HA-3 for 304L B = 8500.00 Pa = 4B/(3*(Do/t)) 4.97232 Pa = 70.72 psi Hence Safe THICKNESS OF DISH = 0.29 In Calculated Thickness of Dish = 7.34 mm Add Thinning Allowances 0.73 mm Add Corrosion Allowances 1.00 mm Calculated Thickness of Dish 9.07 mm A = 0.125/(Ro/t) A = 0.00156 From Fig HA-3 for 304L B = 5500 Pa = B/(Ro/t) 4.82608 Pa = 68.64 psi ASME Sec VIII Div 1 ts = (P*R)/((2*S*E)+(0.4*P)) Kgs/cm 2 ts ASME Sec.II Part D Table 1A ASME Sec VIII Div 1 td = (0.885* P * L ) / ( ( S * E) - ( 0. Td Td ASME Sec VIII Div 1 td = ( P * D ) / ( ( 2* S * E) - ( 0.2 * Td Td ASME Sec VIII Div 1 UG-28 Kgs/cm 2 ASME Sec.II Part D Table 1A ASME Sec II part D Fig G ASME Sec VIII Div 1 UG-28 Maximum Allowable external working Pressure Kgs/cm 2 ASME Sec VIII Div 1 UG-32 td = (0.885*1.67*P * L ) / ( ( S * E) - Td Td ASME Sec VIII Div 1 UG-33 ASME Sec II part D Fig G ASME Sec VIII Div 1 UG-28 Maximum Allowable external working Pressure Kgs/cm 2
Thickness Calculation Of Pressure Vessel Shell
Oct 30, 2014
The Excel sheet can be used to check the shell thickness of pressure vessels
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Shell Under Internal Pr/ / Dt. 17/07/2010 Source Description MOC
THICKNESS OF SHELL
Shell side Design Pressure 39.78 P = 566 PsiInside Radius of shell 625 mm R = 24.61 In
Wall Thickness of Shell 16 mm = 0.63 InWall Thickness of Dish 18 mm td = 0.71 inMax Allowable stress for Shell Material SS 304 L S 20000 PsiMax Allowable stress for Dish Material SS 304 L S 20000 PsiCrown Radius 1250 L = 49.21 InKnuckle Radius 125 r = 4.92 InJoint Efficiency Dish Ed = 1.00Joint Efficiency Shell Es = 1.00
Longitudinal Stress Calculated Thickness of Shell ts = (P*R)/((2*S*E)+(0.4*P)) ts = 0.35 Ints = 8.79 mm
Cicumferential Stress Calculated Thickness of Shell ts = (P*R)/((S*E)-(0.6*P)) ts = 0.71 Ints = 17.99 mm
Add Corrosion Allowance 1.50Thickness of Shell with corrosion allowance 19.49Calculated Thickness is 19.49 mmWe are using 16 mmIncrease Thickness of Shell
THICKNESS OF DISH TORISPHERICA = 1.24 In
Calculated Thickness of Dish = 31.38 mmAdd Thinning Allowances 3.14 mmAdd Corrosion Allowances 1.50 mmNoiminal Thickness of Dish 36.02 mmCalculated Thickness of Dish 36.02 mmWe are using 18 mmIncrease Thickness of Dish
THICKNESS OF DISH ELLIPSOIDAL = 0.70 In
Calculated Thickness of Dish = 17.73 mmAdd Thinning Allowances 1.77 mmAdd Corrosion Allowances 1.50 mmNoiminal Thickness of Dish 21.00 mmCalculated Thickness of Dish 21.00 mmWe are using 18 mmIncrease Thickness of Dish
Shell Under External Pr// Dt. 17/07/2010 Source Description MOC
THICKNESS OF SHELL
Shell External Pressure 4.3 P = 61 PsiOutside Diameter of shell 1282 mm Do = 50.47 InShell Thickness 8 mm ts = 0.31 inDish Thickness 16 mm td = 0.63 inDish SF 40 mm = 1.57 inMax Allowable stress for Shell Material SS 304 L S 15800 PsiMax Allowable stress for Dish Material SS 304 L S 15800 PsiCrown Radius 1282 L = 50.47 InJoint Efficiency Dish Ed = 1.00Dish Depth 336.4 mm h = 13.24 inUnsupported Length of Shell 150 mm L = 5.91 in
L/Do = 0.12Do/t = 160.25
If Do/t >= 10
From Fig G using L/Do and Do/t A = 0.01From Fig HA-3 for 304L B = 8500.00
Pa = 4B/(3*(Do/t)) 4.972322 Pa = 70.72 psi
Hence Safe
THICKNESS OF DISH = 0.29 In
Calculated Thickness of Dish = 7.34 mmAdd Thinning Allowances 0.73 mmAdd Corrosion Allowances 1.00 mmCalculated Thickness of Dish 9.07 mmA = 0.125/(Ro/t) A = 0.00156
From Fig HA-3 for 304L B = 5500
Pa = B/(Ro/t) 4.826077 Pa = 68.64 psi
ASME Sec VIII Div 1 UG-27 ts = (P*R)/((2*S*E)+(0.4*P))
Kgs/cm2
ts
ASME Sec.II Part D Table 1A
ASME Sec VIII Div 1 UG-32td = (0.885* P * L ) / ( ( S * E) - ( 0.1 * P ) ) Td
Td
ASME Sec VIII Div 1 UG-32td = ( P * D ) / ( ( 2* S * E) - ( 0.2 * P ) ) Td
Td
ASME Sec VIII Div 1 UG-28
Kgs/cm2
ASME Sec.II Part D Table 1A
ASME Sec II part D Fig G
ASME Sec VIII Div 1 UG-28
Maximum Allowable external working Pressure Kgs/cm2
ASME Sec VIII Div 1 UG-32
td = (0.885*1.67*P * L ) / ( ( S * E) - ( 0.1 *1.67* P ) ) Td
Td
ASME Sec VIII Div 1 UG-33
ASME Sec II part D Fig G
ASME Sec VIII Div 1 UG-28
Maximum Allowable external working Pressure Kgs/cm2
304L
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