I heard an incident from my friend about LPG leak and fire. After the cylinder became empty, a filled cylinder was connected and when the burner was lit, leak was suspected. To ensure that the gas is leaking, they tested it by taking a lit match stick. Immediately, it caught fire at the regulator and they cried loud for help. Hearing the cries, a person outside, assuming robbery attempt, came with a stick. Seeing the fire, he hit the regulator with the stick which dislodged the regulator and gas fire also stopped.
In one my earlier posts, I narrated a similar incident, in which an auto driver checked the gas level with a lit match stick and received burns on the face and hands due to gas fire.
It is difficult to imagine what drives the people to check gas leak or level with burning matches. LPG cylinder suppliers advise consumers to check the cylinder for leaks, if any, in the presence of the delivery boy,while receiving the cylinder. However, most of us do not do this.
In case of any cylinder fire, or leak, it is better to cover the cylinder with wet blanket so that fire can be extinguished or in case of leak, it will not catch fire from other ignition sources.