| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce a cost of manufacture and eliminate apprehension of leakage, by connecting a metal pipe with high air-tightness to a socket part in an equipment of valve or the like, in a gas rang or the like. SOLUTION: In this joint device for a metal pipe, a first/second annular swollen gall 14a, 14b fitted to a socket hole 12 in a socket part 11 is integrally provided in the metal pipe 13, by forming an annular groove 15 fitting an O ring 17 between parts thereof, and further on right/left both sides of the second annular swollen gall 14b in the metal pipe 13, in a location in an opposite side to the first swollen gall 14a, a third annular swollen gall 16 is integrally provided, which is in a diameter larger than both the annular swollen galls 14a, 14b to come into contact with a tip end surface 11a in the socket part 11.</p> |
