FIELD: gas transfer equipment. SUBSTANCE: proposed gas main has at least two line cocks, each being furnished with bypass unit. Each bypass unit is made in form of pipeline connected with sections of gas main before and after line cock and provided with two shutoff cocks. Joints is made in pipeline between shutoff cocks. This joints is closed by bypass pipeline through joint. Ejector is mounted in bypass pipeline which is installed before section of gas main under repair. Nozzle of ejector is connected to section of gas main before section under repair, and low- pressure chamber is connected to section of gas main under repair. Bypass pipeline of neighbor bypass unit of parallel or the same line of gas main is provided with additional flange joint. Outlet of ejector is connected to this flange joint. EFFECT: enlarged possibility of pumping out of gas from disconnected section of gas main by means of ejector. 1 dwg
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