Over deze norm
This European Standard describes the general requirements for flap valves used for explosion isolation. An explosion isolation flap valve is a protective system, which prevents an explosion from propagating via connecting pipes or ducts into other parts of apparatus or plant areas. An explosion isolation flap valve can only stop the propagation of an explosion when it propagates against the direction of the normal process flow. It does not stop explosions running in the normal process flow direction. This European Standard specifies methods for evaluating the efficacy of explosion isolation flap valves. This European Standard is applicable only to the use of explosion isolation flap valves that are intended for avoiding explosion propagation from a vessel, in which an explosion can result as a consequence of ignition of dust-air mixtures into other parts of the installation via connecting pipes or ducts. The standard covers isolation of such vessels that are protected by means of use of explosion resistant equipment, explosionExplosion isolation flap valves are not designed to prevent the transmission of fire or burning powder transported by the normal process flow. It is necessary to take this into account in risk assessments. This European Standard is only applicable for dust explosions (deflagration) of chemically stable substances and mixtures of these. This European Standard is not applicable for explosions of materials listed below, or for mixtures containing some of those materials: i) gases, vapours and hybrid mixtures; ii) chemically unstable substances; iii) explosive substances; iv) pyrotechnic substances. venting (including flameless venting) or explosion suppression.
|Nederlandse titel||Explosie terugslagkleppen|
|Engelse titel||Explosion isolation flap valves|
|Vervangen door||Normatieve verwijzingen||