1Energy Institute. Institute of Petroleum Model Code of Safe Practice Part 15 AREA CLASSIFICATION CODE FOR INSTALLATIONS HANDLING FLAMMABLE FLUIDS[M].Third edition. London, July 2005.
2American Petroleum Institute. Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2[M]. Second Edition. Washington, January 7 1998.
3American Petroleum Institute. Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2[M]. First Edition. Washington, January 7 1998.
