| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe which can prevent the occurrence of looseness and leakage of water by improving the easiness of pipe connection inside a female-side pipe more than before and whose production cost can be reduced significantly, and to provide its manufacturing method. SOLUTION: The pipe 1, the top end of which has a reinforcement bead 2, is connected inside the female-side pipe 10. The reinforcement bead 2 is formed by integral processing so as to be in plane contact with the inside circumference of the female-side pipe 10 and two or more continuous bead portions 3 are formed by the integral processing, spaced properly from the reinforcement bead 2, so as to be in plane contact with the inside circumference of the female-side pipe 10. COPYRIGHT: (C)2009,JPO&INPIT
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