USCG Exam PracticePumps, valves, and piping systems
Under 46 CFR §56.07-10, when a system component such as a valve has a maximum allowable working pressure lower than that computed for the pipe itself, what pressure must the system be limited to?
- A. The design pressure of the pipe or tubing
- B. The average of the pipe and component maximum allowable working pressures
- ✓ The lowest maximum allowable working pressure among all system componentsCorrect
- D. 110 percent of the component's rated working pressure
Why C is correct
46 CFR §56.07-10(a)(2) requires that where any system component's maximum allowable working pressure 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. Averaging or applying a multiplier is not permitted by the regulation.
Cited:46 CFR §56.07-10