USCG Exam PracticeRefrigeration and air conditioning
Under 46 CFR §58.20-5, what is the minimum design pressure requirement for pressure components in a vessel refrigeration system?
- ✓ The pressure components must be designed for no less than the pressure at which the system's safety devices are setCorrect
- B. The pressure components must be designed for twice the normal operating pressure of the system
- C. The pressure components must be designed to the ABS Marine Vessel Rules minimum, regardless of safety device settings
- D. The pressure components must be designed for the maximum allowable working pressure of the receiver
Why A is correct
46 CFR §58.20-5(a) states explicitly that in no case may pressure components be designed for a pressure less than that for which the safety devices of the system are set. The ABS rules and ASME B31.5 table set minimums, but the safety device setpoint establishes the absolute floor.
Cited:46 CFR §58.20-5