

作为工业安全领域的硬核知识点
防爆设备的\"身份证\"——Ex标志
今天用3分钟+真实案例
结合图2 实例讲解
II:I-矿用产品 II- 非矿用
2G:设备的分类,其中G:gas D:dust
Zone 0 Explosive atmosphere present continuously or for long periods frequently 1G Ga Two faults
Zone 1 Explosive atmosphere is likely to occur under normal conditions occasionally 2G Gb One fault
Zone 2 Explosive atmosphere is unlikely to occur under normal conditions, short periods 3G Gc Normal operation
Zone 20 Explosive atmosphere present continuously or for long periods frequently 1D Da Two faults
Zone 21 Explosive atmosphere is likely to occur under normal conditions occasionally 2D Db One fault
Zone 22 Explosive atmosphere is unlikely to occur under normal conditions, short periods 3D Dc Normal operation
前半部分是ATEX才会加上的,后面的为IECEx的防爆标志。
Ex 不解释拉~
db 以及最后一个Gb 是对应关系。对照ATEX上面的要求,保持一致。
IIC:是气体组别。气体组别危险度排序:IIC(氢气)> IIB(乙烯)> IIA(丙烷)
T4:温度组别对照:T1(450℃)→ T6(85℃)数字越大要求越严格!
真实教训:
某化工厂误用T3组设备(200℃)
在T4气体环境(135℃)中使用
导致设备过热引发事故!
#防爆认证 #工业安全 #电气知识 #认证 #工程师必备
防爆设备的\"身份证\"——Ex标志
今天用3分钟+真实案例
结合图2 实例讲解
II:I-矿用产品 II- 非矿用
2G:设备的分类,其中G:gas D:dust
Zone 0 Explosive atmosphere present continuously or for long periods frequently 1G Ga Two faults
Zone 1 Explosive atmosphere is likely to occur under normal conditions occasionally 2G Gb One fault
Zone 2 Explosive atmosphere is unlikely to occur under normal conditions, short periods 3G Gc Normal operation
Zone 20 Explosive atmosphere present continuously or for long periods frequently 1D Da Two faults
Zone 21 Explosive atmosphere is likely to occur under normal conditions occasionally 2D Db One fault
Zone 22 Explosive atmosphere is unlikely to occur under normal conditions, short periods 3D Dc Normal operation
前半部分是ATEX才会加上的,后面的为IECEx的防爆标志。
Ex 不解释拉~
db 以及最后一个Gb 是对应关系。对照ATEX上面的要求,保持一致。
IIC:是气体组别。气体组别危险度排序:IIC(氢气)> IIB(乙烯)> IIA(丙烷)
T4:温度组别对照:T1(450℃)→ T6(85℃)数字越大要求越严格!
真实教训:
某化工厂误用T3组设备(200℃)
在T4气体环境(135℃)中使用
导致设备过热引发事故!
#防爆认证 #工业安全 #电气知识 #认证 #工程师必备


