易燃、可燃液体的油气扩散是指易燃、可燃液面有一定的蒸汽压，油气通过油罐的呼吸阀、量油孔、在检修时油气通过油罐的人孔或在罐装中国软管与储罐接口处泄漏、脱落，油气向外随风扩散。其危险性使扩散的油气与空气形成爆炸性气体混合物或蒸汽浓度达到爆炸下限时遇静电、明火 Flammable, combustible liquid gas diffusion refers to flammable, combustible liquid surface has a certain vapor pressure, oil and gas through the tank breathing valve, the amount of oil hole, during maintenance oil and gas through the manhole of the tank or in canned China soft Pipe and tank interface at the leak, off, oil and gas spread outwards with the wind. The danger of diffusion of oil and gas to form an explosive gas mixture or vapor concentration reaches the lower explosive limit electrostatic, open flame