USCG Exam PracticePumps, valves, and piping systems
According to 46 CFR §56.07-10, relief valves are required at pump discharges EXCEPT for which type of pump under a specific condition?
- A. Reciprocating pumps designed so that discharge pressure cannot exceed system MAWP
- ✓ Centrifugal pumps so designed and applied that a pressure in excess of the system MAWP cannot be developedCorrect
- C. Gear pumps whose discharge is protected by a bypass valve
- D. Diaphragm pumps operating below 50 psig
Why B is correct
46 CFR §56.07-10(b)(1) states that relief valves are required at pump discharges except for centrifugal pumps so designed and applied that a pressure in excess of the maximum allowable working pressure for the system cannot be developed. No other pump type is granted this exception in the supplied text.
Cited:46 CFR §56.07-10