本欧洲标准规定了选择气体爆炸防护系统的基本设计要求。本欧洲标准EN 14797和EN 14460形成了一系列共同使用的三个标准。 注1:这三个标准一起代表了气体爆炸排放的概念。 注2:为了避免将爆炸物传送到其他通讯设备，还应考虑使用prEN 15089。 本欧洲标准适用于: ï¾排气口尺寸以防止气体爆炸的内部压力影响; ï在外壳外的火焰和压力影响; 反冲力 排气管的影响; 初始温度和压力的影响。 本欧洲标准不提供设计和应用规则，以防止爆炸反应或失控放热反应（包括气相分解）产生的影响。 本欧洲标准不适用于: 由设备加工，使用或释放​​的材料或构成设备和建筑物的材料引起的火灾风险; 用于实现防爆排气的防爆设备的设计，构造和试验; ï¾可以防止由过度填充，超压，火灾等事件引起的超压

This European Standard specifies the basic design requirements for the selection of a gas explosion venting protective system. This European Standard, EN 14797 and EN 14460 form a series of three standards which are used together. NOTE 1 These three standards together represent the concept of gas explosion venting. NOTE 2 To avoid transfer of explosions to other communicating equipment one should also consider applying prEN 15089. This European Standard is applicable to:  vent sizing to protect against the internal pressure effects of a gas explosion;  flame and pressure effects outside the enclosure;  recoil forces;  influence of vent ducts;  influence of initial temperature and pressure. This European Standard does not provide design and application rules against effects generated by detonation reactions or runaway exothermic reactions including decomposition in the gas phase. This European Standard is not applicable to:  fire risks arising either from materials processed, used or released by the equipment or from materials that make up equipment and buildings;  design, construction and testing of explosion venting devices, which are used to achieve explosion venting );  protection against overpressures caused by events such as overfilling, overpressurisation, fire engulfment, overheating etc. NOTE 3 Protection by venting against dust and hybrid explosions is specified in EN 14491.