Flare Knock Out Drums (FKOD’s) are designed to be as compact as possible, usually with a small building for the controls. We can customize the size, pressure and any other requirements you require.

All flare, vent, and relief systems must include a liquid knockout drum. The knockout drum removes any liquid droplets that carry over with the gas relief sent to the flare. Most knockout drums are horizontal. A horizontal knockout drum must have a diameter large enough to keep the vapor velocity low enough to allow entrained liquids to settle or drop out.

Knockout drums operated at atmospheric pressure should be sized to handle the greatest liquid volume expected at the maximum rates of liquid buildup and pump out.

Knockout drums normally are operated at atmospheric pressure. Some applications require 50psi MAWP in order to contain a possible explosion. Stoichiometric hydrocarbon/air explosions produce peak pressures seven to eight times the normal pressure.


Flare Knock Out Drums (FKODs) are an essential component of the flare system in the oil and gas industry. They are used to remove liquids and solids from the waste gases before they are burned in the flare stack. The FKOD acts as a filter and separates liquids and solids from the gas stream, which prevents these substances from entering the flare system and causing damage to equipment or safety issues.

The FKOD is designed to ensure safe and efficient operation of the flare system. The drum is typically located upstream of the flare, and is made from materials that can withstand the harsh conditions of the oil and gas industry, such as high temperatures and corrosive gases. The FKOD is an important safety feature, as it helps to minimize the risk of explosions, fires, and other safety incidents that can occur when liquids and solids are not properly removed from the waste gases.

Overall, the Flare Knock Out Drum (FKOD) is an essential component in the oil and gas industry, and plays a critical role in ensuring the safe and efficient operation of the flare system.