燃气管道应急:燃气 PE 管挖断了怎么接?安全规范要牢记

2025-09-13

燃气PE管道作为城市燃气输送的重要载体,一旦因施工不当、外力破坏等原因发生挖断事故,不仅会造成燃气泄漏,还可能引发爆炸、火灾等严重安全隐患。因此,掌握正确的应急处理方法和严格遵守安全规范至关重要。

当燃气PE管不幸被挖断,首要任务是确保安全。应立即停止周边一切施工操作,严禁动用明火、开关电器,以防电火花引爆燃气。同时,迅速疏散现场无关人员,并拨打燃气公司抢修电话和119报警,告知准确位置和情况。在专业人员到达前,可在安全距离外设置警示标志,防止无关人员进入危险区域,并确保现场通风良好,加速燃气扩散。

待燃气公司专业抢修人员到场后,他们会首先对现场燃气浓度进行检测,确认安全后关闭上下游阀门,彻底切断气源。接下来,抢修人员会对管道断口进行评估,根据管材规格、压力等级以及现场条件,选择合适的连接方式。常用的PE管连接方法包括热熔对接和电熔连接。热熔对接是将两根PE管的端面加热熔化后,迅速将其贴合加压,冷却后形成一体;电熔连接则是通过电熔管件内的电阻丝通电发热,使管件与管材熔为一体。无论采用哪种方式,都必须严格按照操作规程进行,确保接口熔接质量。

在连接操作过程中,对管道的清洁处理尤为重要。需使用专用工具将断口处的泥土、杂质清理干净,并检查管材是否有裂纹、划伤等缺陷。对于热熔对接,要保证管材端面平整、垂直,加热板温度和加热时间需严格控制;电熔连接则要确保管材插入电熔管件的深度符合要求,避免虚接。连接完成后,需等待接口充分冷却固化,期间严禁移动或受力。

接口连接完毕并非万事大吉,还需进行严格的气密性试验。通过向管道内充入一定压力的气体(通常为空气或氮气),观察压力变化,以检验接口的密封性。只有在确认接口无泄漏、强度合格后,方可进行后续的回填和恢复供气工作。恢复供气时应缓慢开启阀门,密切观察下游用户用气情况,确保无异常。

整个抢修过程中,所有参与人员必须穿戴好防护用品,严格遵守安全操作规程。非专业人员切勿擅自进行管道连接操作,以免发生意外。燃气PE管的抢修不仅关乎燃气供应的及时恢复,更直接关系到人民群众的生命财产安全,任何环节都不容疏忽。

总之,燃气PE管挖断后的应急处理,必须坚持“安全第一、预防为主、专业操作”的原则。从最初的紧急响应到最终的恢复供气,每一步都要遵循科学规范,确保抢修工作安全、高效、有序进行,最大限度地降低事故带来的损失和风险。同时,也提醒各施工单位在作业前务必查明地下管线走向,避免盲目施工造成管道损坏。



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