Dangerous “backfire” phenomenon that occurs during gas welding/cutting operations (safety issue)
When gas welding or gas cutting, if the flame burns into the inside of the nozzle, the temperature is extremely high and out of control.
What is the high temperature?
The flame used in gas welding and cutting is formed by the combustion of oxygen mixed with flammable gases such as acetylene and propane.
When acetylene burns in oxygen, the temperature of the flame core can reach as high as 3100 ° C-3200 ° C.
When tempering occurs, the flame above 3000 ° C will directly burn towards the mixing chamber, valves, and gas hoses of the welding and cutting torch.
If the backfire preventer fails, the flame will continue to spread and may burn all the way to the pressure reducing valve or even the gas cylinder, causing the cylinder to overheat and explode, resulting in a catastrophic accident.
The phenomenon of “tempering” in gas welding and cutting accidents has a flame temperature that is consistent with its normal flame temperature, reaching over 3000 ° C, which is an extremely dangerous high-temperature process. So, in order to ensure safety at work, it is necessary to use qualified tempering arresters.