Tempering of leaky welding cabinet

A gas welder on a construction team was performing welding work using a leaking torch. His palms were burned and blistered by flames coming from the adjusting wheel. After applying badger grease, he continued welding. During the welding process, a backfire occurred again, causing the oxygen hose to explode, the pressure regulator to catch fire and burn. When the oxygen cylinder valve was closed, the upper half of the cylinder was extremely hot to the touch, posing a significant danger.

The main causes of the accident were:

A leaking torch is highly prone to backfire; additionally, the oxygen cylinder valve and pressure regulator were opened while adjusting the oxygen pressure; furthermore, grease adhered to the pressure regulator, causing backfire, which, under the strong oxidizing effect of compressed pure oxygen, resulted in a violent combustion.

Prevention measures:

(1) Before gas welding, the welding torch should be checked for proper function. If a leak is found, it must not be used and must be repaired before continuing welding;

(2) Do not use gloves with grease to open the oxygen cylinder valve and pressure regulator.