USCG Exam PracticePumps, valves, and piping systems
When determining the maximum allowable working pressure of a piping system that includes a valve whose rated pressure is lower than that computed for the pipe, which pressure governs the system under 46 CFR §56.07-10?
- A. The pressure computed for the pipe or tubing
- B. The average of the pipe pressure and the valve pressure rating
- ✓ The lowest maximum allowable working pressure among all system componentsCorrect
- D. The pressure stamped on the system's primary pump casing
Why C is correct
46 CFR §56.07-10(a)(2) states that where the maximum allowable working pressure of a system component such as a valve or fitting is less than that computed for the pipe or tubing, the system pressure must be limited to the lowest of the component maximum allowable working pressures.
Cited:46 CFR §56.07-10