Txawv yuav tsum tau tawg-proof classifications ntawm cranes arise ntawm varying flammable thiab explosive tej chaw. Cov kev cai no yuav tsum poob rau hauv peb lub ntsiab pawg:
Qeb | Roj Classification | Cov neeg sawv cev gases | Yam tsawg kawg yog Ignition spark zog |
---|---|---|---|
Nyob rau hauv lub mine | Kuv | methane | 0.280mJ |
Factories sab nraum lub Mine | IIA | Propane | 0.180mJ |
IIB | Ethylene | 0.060mJ | |
IIC | hydrogen | 0.019mJ |
1. Hoob kawm kuv tawg-prof cranes, tsim raws li Exd kuv;
2. Hoob kawm II industrial tawg-prof cranes, Tsim raws li Exd IIB T4 los yog Exd IIC T4;
3. Dust explosion-proof cranes, designated as DIP A21 TA T4;
Within Class II, explosion-proof cranes categorized as flameproof “d” Thiab intrinsically muaj kev ruaj ntseg “Kuv” are classified into IIA, IIB, and IIC levels. Cranes with an IIB rating are appropriate for IIA environments, whereas cranes rated IIC are suitable for both IIA and IIB environments.