Flame screen is usually installed at vent mast and protects tank from flame in the pipe lines, gas duct lines and vent riser of the tank where inflammable gas occurred due to explosion, and ignition. It happens when inflammable gas is changed up to the temperature of flashing point owing to the influence of operation.
International Standard
IMO MSC/Circ. 1009 & IMO MSC.1/Circ.1324
IMO MSC/Circ.677
ISO 16852:2016