Factory inspection 1, each explosion-proof hoist should be done after the factory inspection, test requirements (including special requirements of the user to check the test items) before leaving the factory, the factory products should be accompanied by a certificate of conformity. 2, check the explosion-proof hoist selected explosion-proof electrical equipment is "explosion-proof certificate". Verify the type, level and temperature group of explosion-proof electrical equipment according to the design drawings of explosion-proof hoists, and check the correctness of their installation. 3, verification of 6.3 ~ 6.5, 9.1, 9.2 of the implementation of the record documents. 4, the rest of the inspection should be in accordance with the JB / T 5317 or JB / T 9008.2 inspection program test.