The scope of application1. Applied to the place which mayaccumulate the gas of inflammable and explosive and each relevant dangerousarea, such as ship, petroleum platform, chemical place, coal and other placesetc.2. Applied to the cabins which have inflammableand explosive gas, such as the dangerous place of accumulator room, paintingroom and liquid cargo ship etc.3. Electrical equipment used in theexplosive gas environment is divided into:I Series: Coal mine electric equipment.II Series: In addition to the coal mine ofother electrical equipment used in the explosive gas environment.According to the characteristic of theexplosive gas, the electric equipment of II category can be divided: flameproof“d” of II category and essence safety “I”, the electric equipment can bedivided into IIA, IIB and IIC category, the remarking IIB equipment fit for theuse condition of II A’s equipment, the remarking II C equipment fit for the usecondition of II A and II B’s equipment.Adopt standard1. Conform to national standard ofGB12045;GB3836-1/2/3/9;GB7000.1;GB19510.4.2. Conform to China Classification SocietyGD01 standard.3.Conform to international IEC standard.