USCG Exam PracticeBoiler and steam propulsion fundamentals
Under 46 CFR §56.50-30, what is the required design pressure for feed piping from the boiler to and including the required stop and stop-check valves?
- A. Equal to the maximum allowable working pressure of the boiler
- B. Equal to the feed pump relief valve setting
- ✓ Exceeding the maximum allowable working pressure of the boiler by either 25 percent or 225 psig, whichever is lessCorrect
- D. Exceeding the maximum allowable working pressure of the boiler by either 25 percent or 225 psig, whichever is greater
Why C is correct
46 CFR §56.50-30(a)(3) specifies that feed piping from the boiler to and including the required stop and stop-check valves must have a design pressure exceeding the maximum allowable working pressure of the boiler by either 25 percent or 225 psig, whichever is less. The feed pump relief valve setting applies to the discharge piping on the pump side of those valves.
Cited:46 CFR §56.50-30