API 570 PREPARATORY COURSE TEASER 3: Design of Permanent Blank (Question)
Design a seamless permanent blank for following conditions. Design Pressure = 300 psig Blank Material Safe Stress = 17,500 psig Corrosion Allowance = 2.0 mm Gasket Internal Diameter = 6.7” (170 mm) Type of Flanges = SORF
Solution:
P.O. Box No. 7274, Dammam 31462, Saudi Arabia
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TEL (966) 3 857 0006
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API 570 PREPARATORY COURSE TEASER 3: Design of Permanent Blank (Solution) Design a seamless permanent blank for following conditions. Design Pressure = 300 psig Blank Material Safe Stress = 17,500 psig Corrosion Allowance = 2.0 mm Gasket Internal Diameter = 6.7” (170 mm) Type of Flanges = SORF
Min required thk for permanent blank
Tm
=
dg
3P 16 SE
+
C
dq = I.D. of gasket (for raised or flat face) Take P = 300 psig C = 2.0mm S = 17.500 psig E = 1.0 dq = 6.7” (170mm)
Tm= 170
3× 300 16× 17,500
+
C
= 9.63 + 2.0 = 11.63mm ---------------------------------------- Say 12mm
P.O. Box No. 7274, Dammam 31462, Saudi Arabia
●
TEL (966) 3 857 0006
[email protected] ● www.gotoITC.com
●
FAX (966) 3 857 5255
●
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