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- First Assistant Engineer (Steam-Motor-Gas Turbine Plants (Unlimited)) »
- Q513 - Steam Plants
93. The safety valve nominal size for propulsion boilers and superheaters must be not less than 1 1/2 inches and not more than 4 inches. The term 'nominal size' refers to the __________.
Nominal size for safety valves refers to the diameter of the inlet opening, which is standardized in pipe-size terms.
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