USCG Exam PracticePumps, valves, and piping systems
When the maximum allowable working pressure of a system component such as a valve is lower than the pressure computed for the pipe itself, 46 CFR §56.07-10 requires that the system pressure be limited to which value?
- A. The design pressure of the pipe or tubing
- B. The average of the pipe MAWP and the component MAWP
- ✓ The lowest maximum allowable working pressure among all system componentsCorrect
- D. The MAWP of the pipe, provided a relief valve is installed downstream of the component
Why C is correct
46 CFR §56.07-10(a)(2) states that where the MAWP of a system component 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