| 摘要 |
PURPOSE: A gas branch pipe is provided to prevent cracks by the impact or vibration by steadily attaching the gas branch pipe to a gas vertical pipe. CONSTITUTION: A gas branch pipe comprises a connection pipe(20), a corrugated pipe(40), washers(50,51) and coupling nuts(60,61). One side end of the connection pipe is formed to be an arc-shaped plane(20b) in order to surround the external diameter of a hole(10a). A screw tab(20a) is formed in the other diameter surface of the connection pipe. The corrugated pipe made of metal is connected to the screw tab of the connection pipe. Hanging sills(40a,40b) are formed in the both end part of the corrugated pipe. The washer is inserted inside the top and bottom of the hanging sill and has jaws(50a,50b,51a,51b). The jaw is located in the inside end part and surrounds the circumferential surface of the washer. The screw tab of a connection socket nut(70) gets tightened in the screw tab of the coupling nut.
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