According to GB3836.1-2000 

 Part 1: common requirement> and GB3836.2-2000 

 Part2: flameproof typed>, motor and electrical appliances of this crane are explosion proof type. When explosion proof grade is ExdII CT4, travelling mechanism should do spark proof treatment. The whole machine meets standards of JB/T0219, explosion proof grade have ExdII BT4 and ExdII CT4 two kinds. It has  characteristic of rational construction, perfect appearance and strong Ex technical performance. It can be used together with HB,BCD type explsion proof electric hoist.

Its max lifting capacity is 63t and has three types:

 1.LXB explosion proof electric single girder suspension crane.

 2.LB explosion proof electric single girder crane.

 3.LHB type explosion proof electric hoist double girder crane. The working class is A3-A4, working environment temperature is -25DC to 40 DC.