1. 乙炔气体防爆分级标准认知缺失

1. Lack of understanding of acetylene gas explosion-proof classification standards

乙炔引燃能量出色低，归属于IIC类爆炸性气体，国标GB3836强制要求存储区域电气设备建议选用Ex d IIC T4，IIB级防爆设备隔爆间隙精度不足，无法抵御乙炔爆燃工况。

Acetylene has extremely low ignition energy and belongs to Class IIC explosive gas. The national standard GB3836 requires that electrical equipment in storage areas must use Ex d IIC T4. The explosion-proof gap accuracy of Class IIB explosion-proof equipment is insufficient to withstand acetylene explosion conditions.

2. 混淆配件防爆与整机防爆合规要求

2. Confuse the explosion-proof requirements of accessories and the overall explosion-proof compliance requirements

市场简易产品仅更换防爆电机，导轨限位、控制箱、接线端子仍为普通电气，整套无整机防爆检测报告，江苏危化园区安监明确不认可分体改装产品。

The market only replaces explosion-proof motors for simple products, and the guide rail limit, control box, and wiring terminals are still ordinary electrical. There is no complete explosion-proof testing report for the whole set, and the safety supervision of Jiangsu Hazardous Chemical Park clearly does not recognize split modification products.

3. 忽略乙炔仓库防火分隔双重规范

3. Neglecting the dual regulations for fire separation in acetylene warehouses

乙炔库房为甲类仓库，除防爆性能外，门洞分隔需同时满足A类3h/4h耐火隔热标准，普通防爆快速门无耐火结构，火灾工况无法阻隔火焰蔓延。

The acetylene warehouse is a Class A warehouse. In addition to explosion-proof performance, the door opening separation must also meet the Class A 3h/4h fire-resistant and thermal insulation standards. Ordinary explosion-proof quick doors do not have fire-resistant structures, and fire conditions cannot block the spread of flames.