How can the test pressure or the maximum allowable working pressure be more than the design pressure.

Asked by sicalamanto 4 years, 12 months ago | 1 Answers

When the system is designed to stand only 100 psi how can it be tested to 150 psi?


1 Answer

0
ChemKB 4 years, 11 months ago
As per the Code rules the internal hydrostatic test pressure is 1.3 times the design pressure or MAWP (with some temperature correction as applicable). In past some code rules also required for test pressure to be 1.5 times the MAWP. Note: MAWP should be same as design pressure.

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Definitions of MAWP, MAP, MOP, Design Pressure, Hydrotest Pressure, Burst Pressure, Working Pressure and more
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Maximum Allowable Working Pressure (MAWP) - maximum gauge pressure permissible at the top of the equipment in its operating position …