How should the relief valve discharge be configured for aboveground containers of more than 2000 gallons?

The correct configuration for the relief valve discharge for aboveground containers of more than 2000 gallons is to pipe it vertically upwards. This setup is essential for safety and operational effectiveness.

When the relief valve discharges, it releases excess pressure that could otherwise lead to dangerous situations, such as the rupture of the container. By directing the release of gas vertically upwards, the vapor has the opportunity to disperse safely into the atmosphere, minimizing the risk of accumulation that could lead to a fire or explosion. Additionally, this upward direction helps to prevent any potential impact from rain or other environmental factors that could enter the system and lead to corrosion or other issues.

Other configurations, such as piping it horizontally or leaving it open to the environment without proper direction, do not facilitate the safe dispersal of gas. Ducting the discharge into the ground is also not advisable, as it may lead to the buildup of gas in the soil, posing risks of ground-level concentration and potential ignition sources. Therefore, vertically upwards discharge is the most effective and safest method for relief valve discharge on large aboveground LP gas containers.