According to Coast Guard Regulations (46 CFR), which of the following conditions is true concerning the construction and/or operation of pressure-vacuum relief valves?

Question

Accepted Answer

Valve bodies, discs, spindles, and seats must all be made of bronze or a corrosion resistant material.

Answer

Pressure-vacuum valves for cargo tanks shall not be less than 2 inches nominal pipe size.

Answer

Where springs are employed to actuate the valve discs, the springs are to be either plated or fabricated of a corrosion resistant material.

Answer

The design and construction of the valves is such that they must be removed for overhauling, insuring there will be no vent blockage which could occur during a repair period.

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