FIELD: welding engineering. SUBSTANCE: system has cylinder with acetylene or hydrogen, cylinder with oxygen or air, reducers positioned at outlets of every cylinder, connecting hoses and safety devices. The latter are mounted at outlets of reducers and at flame-machining device inlets. Safety devices installed at outlets of reducers are made as interlocked check valve, temperature shut-off valve and flame-extinguishing. Each of temperature shut-off valves is represented by spring-loaded pusher with sleeve. Springs of check and shut-off valves, pusher and shut-off valve sleeve are arranged in flame-extinguishing bushing coaxially. Shut-off valve pusher serves as a rest for check valve spring. It is coupled to sleeve by breaking coupling for overlapping of check valve outlet channel by pusher in case of temperature rise. Safety devices positioned at inlets of flame-machining device are made as the second check valves and their inlets communicate with connecting hoses and outlets, with inlets of flame-machining device. EFFECT: higher operational reliability. 3 dwg
