Question

Where the test pressure of piping exceeds the vessels test pressure, and it is not considered practical to isolate the piping from a vessel, the piping and the vessel may be tested together at the vessel test pressure, provided the owner approves and the vessel test pressure is not less than ___% of the piping test pressure calculated by ASME B31.3, paragraph 345.4.2(b).

Answer 1

In cases where the test pressure of piping exceeds the test pressure of a vessel, they can be tested together at the vessel test pressure under certain conditions.

Step-by-step explanation:

In cases where the test pressure of piping exceeds the test pressure of a vessel, and it is impractical to isolate the piping from the vessel, the piping and vessel can be tested together at the vessel test pressure, provided certain conditions are met. One of these conditions is that the vessel test pressure must not be less than a certain percentage of the piping test pressure calculated by ASME B31.3, paragraph 345.4.2(b).

The specific percentage that the vessel test pressure must meet is not mentioned in the question. However, it is important to note that it should not be less than a certain value specified by the owner, considering the practicality of testing the piping and vessel together.