What is the minimum allowable distance between LPG relief/overboard discharge and any opening to the cabin or hull interior?

The minimum allowable distance between LPG relief or overboard discharge and any opening to the cabin or hull interior is 20 inches. This requirement is established to prevent the accumulation of potentially hazardous gases within the enclosed spaces of the vessel. LPG, being heavier than air, can settle in low areas or spaces, posing a significant safety hazard if allowed to enter the cabin or interior areas.

Ensuring a separation distance of 20 inches helps mitigate the risk of gas leakage and ensures that any released gas is directed away from places where it could pose a fire or explosion risk. This safety precaution is critical in maintaining a safe environment for those on board, as it reduces the potential for dangerous concentrations of gas to develop within living or working areas.

A distance of less than 20 inches might not provide adequate prevention against gas migration, increasing the risk of exposure to harmful vapors in enclosed areas. Therefore, adhering to standards that specify a minimum of 20 inches is essential for safe LPG storage and usage aboard vessels.