Analysis of the reasons for open-flame combustion during chlorine pipeline maintenance?
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The pipeline for the wet chlorine gas coming out of the electrolyzer uses PVC/FRP pipes after the control valve; the chlorine gas pressure is 0±30 mm of water column. Due to a leak at the flange of the expansion joint, when trying to repair the leak in the PVC/FRP pipe using a grinder, a sudden flame outbreak occurred. The maintenance staff managed to extinguish the flame by using gloves they were wearing. Such repairs have been carried out on several occasions before, but a flame outbreak only occurred this time. Please analyze the reasons for the flame outbreak or identify the substance that caused it.
Chlorine has a \"chlorine fire\" temperature; at 149°C, it reacts with iron and burns, but there are no reports of fiberglass producing an open flame when it burns.
Analyze the purity of chlorine; it is possible that the hydrogen content in chlorine is too high. A hydrogen content in chlorine exceeding 4% may already reach the explosive limit
It is possible that the combustion was caused by FRP; FRP is a flammable material, while PVC is difficult to ignite
Chlorine has strong oxidizing properties; chlorine fire