HWK 5-solution

HWK 5-solution - PGE 362 Production Engineering Homework 5...

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PGE 362 Production Engineering Homework 5 This is due at lecture time on Oct. 12, 2007. (1) Please determine the correct line pipe to use for the following gas pipe line. Maximum Operating Pressure (MOP) = 1100 psi Maximum line temperature = 100 deg F Line pipe OD = 3.5” Pipe Option (1) X-42, t = 0.188”, mill test = 2710 psi Pipe Option (2) X-46, t = 0.216”, mill test = 3000 psi Connection: Field butt weld Location: along Interstate Highway 10 right of way. CODE: Use the ASME code shown in the notes. Please show your work to demonstrate which pipe option is the correct choice. Step 1 : Compute the design pressure for each pipe ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 0.188 0.216 2 2 42000 0.188 0.4 0.6 1.0 1083 psi 3.5 2 46000 0.216 0.4 0.6 1.0 1363 psi 3.5 St p FET D p p = = = = = From this calculation it is clear that the X-42, 0.188” wall thickness will be inadequate because the design pressure is less than the MOP. This leaves the X- 46, 0.216” wall thickness as the only possible option.

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HWK 5-solution - PGE 362 Production Engineering Homework 5...

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