天然气具有易燃、易爆、有毒等特点,一旦供气用气管网、阀门、胶管等设施发生老化、泄漏,极易发生火灾、爆炸及中毒事故,使国家和人民生命财产遭受损失。虽然供气行业采取多种措施加强了安全管理,并且全社会对天然气安全不间断、多渠道广泛宣传,提高了用户、居民的认识,有效遏制了燃气事故不断上升,但天然气的供气安 Natural gas is flammable, explosive and poisonous. Once the gas pipelines, valves, hoses and other facilities are aged and leaked, natural gas can easily cause fire, explosion and poisoning accidents, causing the loss of life and property of the country and its people. Although various measures have been taken by the gas supply industry to improve safety management and the society as a whole has made continuous and multi-channel publicity on natural gas safety and raised awareness of users and residents, it has effectively stopped the gas accidents from rising. However, the gas supply safety of natural gas