Supply explosion-proof electrical explosion-proof lighting, the Shanghai the giant explosion-proof union, the supply explosion-proof electrical explosion-proof lighting, the amount of giant explosion-proof union, Explosion-proof electrical explosion-proof lighting, the amount of the giant explosion proof union, BHJ series, explosion-proof union (dII) Scope 1 and Zone 2 dangerous places. 2, IIA, IIB, IIC explosive gas atmospheres. Features 1, made of carbon steel, zinc plated or made of stainless steel. 2, thread can be specially made, such as the NPT, metric thread. Note: Note thread size should indicate the internal and external threads. Such as: the BHJ-G3 / 4 "(within) / G1 (outer) side of the meaning within the thread G3 / 4", one end of the external thread G1 ". 3, in line with GB3836-2000, IEC60079 standard request.