USCG Exam PracticeBoiler and steam propulsion fundamentals
According to 46 CFR §56.50-30, the feed piping from the boiler to and including the required stop and stop-check valves must have a design pressure that exceeds the maximum allowable working pressure of the boiler by which of the following?
- A. 10 percent or 100 psig, whichever is greater.
- ✓ 25 percent or 225 psig, whichever is less.Correct
- C. 25 percent or 225 psig, whichever is greater.
- D. 10 percent or 150 psig, whichever is less.
Why B 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 that exceeds the maximum allowable working pressure of the boiler by either 25 percent or 225 psig, whichever is less.
Cited:46 CFR §56.50-30