This double girder explosion-proof bridge crane is for the following dangerous working places situations:
1. Proofing ability is not higher than grade IIB and IIC;
2. Flammable gas and steam-formed mixed explosive gas situations with ignition temperature group is T1 ~ T4 group;
3. Hazardous area zone 1 or zone 2;
4. Working duty: A3 ~ A4.