API 570 Pc 19feb05 Cs Teaser 3

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

info@gotoITC.com ● www.gotoITC.com

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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

info@gotoITC.com ● www.gotoITC.com

●

FAX (966) 3 857 5255

●

2