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Liquid Process Piping Episode 11

Tham khảo tài liệu 'liquid process piping episode 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | EM 1110-1-4008 5 May 99 40 mm pipe t _ 0.0896 MPa 50 mm m 2 110 MPa 1.0 0.0896 MPa 0.4 2 mm 2.02 mm The commercial wall thickness tolerance for seamless rolled pipe is 0 -12 . 2.02 mm tNOM 1 - 2.3 mm NOM 1.0 0.125 Nominal 40 mm pipe has a thickness of 5 mm therefore the 40 mm pipe section satisfies pressure intergrity. LOADS Step 1. Pressure - See the pressure integrity calculations for the design pressure. Step 2. Weight - The 80-INF-1500 dead weight is strictly the piping. 80-INF-1500 will not be insulated because it will be under continuous use. Because the piping section will be continuously full the weight of the fluid will be determined as part of the dead weight. W WP WL AP - B D P L P P 4 i L From a lined piping manufacturer AP P 133 N m for 80 mm lined piping and 67.1 N m for 40 mm lined piping. 80 mm pipe W80 133 N m B 71.1 mm2 9781 N m3 x 10 6m 2 mm 2 172 N m uniformly distributed 40 mm pipe W40 67.1 N m B 31.9 mm2 9781 N m3 x 10 6m 2 mm 2 74.9 N m uniformly distributed Step 3. Wind - From TI 809-01 the basic wind speed is 40.2 m s. The plant is located in an area with exposure C open terrain with scattered obstructions having heights less than 10 m so a gust factor of 33 is added to the basic wind speed to determine the design wind speed V. v dw Vw 40.2 m s 1.33 53.5 m s or 192.6 km hr minimum of 161 km hr 80 mm pipe Ref. p. 2-7. Re80 CW2 VW Do 6.87 53.5 m s 90 mm 3.3 x 104 Using the Re value in the ASCE 7 drag coefficient chart and assuming an infinite circular cylinder i.e. L D 5 1 Cd 1.21. Ref. p. 2-7. FW80 CW1 VW CD Do 2.543x10 6 53.5 m s 2 1.21 90 mm 2 0 0.79 N m 40 mm pipe Ref. p. 2-7. C-12 Re40 CW2 VW Do 6.87 53.5 m s 50 mm 1.8 x 104 Using the Re value in the ASCE 7 drag coefficient chart and assuming an infinite circular cylinder i.e. L D 5 1 Cd 1.21. Ref. p. 2-7. FW40 CW1 VW CD Do 2.543x10 6 53.5 m s 2 1.21 50 mm 2 0 0.44 N m The design wind loads are uniformly distributed horizontally i.e. perpendicular to the weight load