How to extinguish a gas pipeline fire?
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What to do if a gas pipeline catches fire? Are there different treatment methods for pipes of different diameters?
Reduce the pressure to 500 Pa, use a dry powder fire extinguisher to put out the fire, then cut off the gas before proceeding with further actions
For gas pipelines, it is necessary to determine whether they are under positive pressure or negative pressure, as well as what the diameter is. For pipelines under positive pressure with a diameter of less than 100, the valve can be closed directly; for those with a diameter greater than 100, the pressure must be reduced by releasing air from the pipeline, after which steam can be used to extinguish the fire. If the fire is severe, fire water should be used to cool the pipes and equipment surrounding the fire site, in order to prevent overheating and deformation that could cause further damage. Negative pressure pipelines generally do not catch fire. Such pipelines usually require oxygen monitoring devices to be installed; by controlling the oxygen level, fires can be prevented. If a negative pressure pipeline does catch fire, the only option is to shut down the fan urgently