In accordance with Coast Guard Regulations (46 CFR), which of the following statements is true concerning safety valve construction and/or operation used on propulsion boilers?

Question

Accepted Answer

Not have threaded inlets for valves larger than 2".

Answer

Gagging a safety valve by means of a set screw through the cap when gags are unavailable is acceptable only when conducting a hydrostatic test.

Answer

After the valve is set and adjusted, the tolerance in popping and reseating pressures shall not vary more than plus or minus 1 1/2%.

Answer

All of the above.

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