Our flame arresters comply with ISO 16852 standards, as set out in the ATEX Directive 94/9/CE. There are different types of flame arresters depending on the gas and the type of explosion. To ensure the integrity of the equipment to be protected, it is vital to select correctly the type of flame arrester. For your correct choice you must know:
The gas group of the mixture IIA, IIB or IIC
The origin of the possible ignition point and the distance to the flame arrester
Direction of the advance or the recoil of the flame
END OF LINE DEFLAGRANTION FLAME ARRESTORS
End-of-line flame arresters are always explosion-proof by definition, since there is virtually no distance between the ignition point and the location of the flame arrester. They protect the tank or the pipe from the possible recoil of the flame coming from the outside in case of aspiration during the emptying of the tank. They are installed in the vents or at the end of the pipes.
They can be of prolonged combustion, flames that do not spread to the interior of the pipe, being able to withstand a 2-hour exposure to the flame or of brief combustion when the flame propagates into the pipe or the tank. The flame arresters that are installed together with the vent or empty pressure valves are considered as end-of-line flame arresters. They are designed to prevent a possible spot deflagration (caused by lightning, a spark, an electric shock) from entering the tank when the tank is breathing in during emptying, at which time a flame from outside could enter inside to the tank.