USCG Exam PracticePumps, valves, and piping systems
Under 46 CFR §56.07-10(e), when multiple allowable stress values are listed for a piping material in the ASME Boiler and Pressure Vessel Code, which value must be used unless the Commandant approves otherwise?
- A. The highest listed value, to maximize design efficiency
- B. The average of all listed values
- C. The value corresponding to the design temperature of the system
- ✓ The lowest listed valueCorrect
Why D is correct
46 CFR §56.07-10(e)(2) states that where multiple stresses are listed for a material, the lowest value of the listing must be used unless otherwise approved by the Commandant. Additionally, allowable stress values restricted by footnote or italicized in the ASME BPVC must not be used at all.
Cited:46 CFR §56.07-10