USCG Exam PracticeRefrigeration principles and systems
Under 46 CFR §58.20-5, which statement regarding the design pressure of refrigeration system pressure components is correct?
- A. Pressure components may be designed for any pressure the manufacturer selects, provided ABS approval is obtained.
- ✓ Pressure components must be designed for a pressure no less than that for which the safety devices of the system are set, and minimum design pressures must meet ASME B31.5 Table 501.2.4.Correct
- C. Pressure vessels in refrigeration systems are exempt from part 54 requirements provided they comply with ABS Marine Vessel Rules.
- D. The minimum design pressure for all components is set solely by the relief valve manufacturer's rating, with no regulatory floor.
Why B is correct
46 CFR §58.20-5(a) states that in no case may pressure components be designed for a pressure less than that for which the safety devices are set, and that minimum pressures must comply with ASME B31.5 Table 501.2.4. The same paragraph also requires pressure vessels to be designed in accordance with part 54, making option C incorrect.
Cited:46 CFR §58.20-5