A periodic hydrostatic test is being performed on a main steam line between the boiler drum and the throttle valve which has a maximum allowable working pressure of 960 psig. In accordance with 46 CFR regulations pertaining to periodic tests and inspections as related to piping systems, what is the required hydrostatic test pressure for this procedure?

Question

Accepted Answer

Option B: 1200 psig. Per 46 CFR 56.97-40, periodic hydrostatic tests for piping systems are generally conducted at 1.25 times the Maximum Allowable Working Pressure (MAWP). For a system with a MAWP of 960 psig, the calculation 960 multiplied by 1.25 results in a required test pressure of 1200 psig.