| 摘要 |
PROBLEM TO BE SOLVED: To provide a city water pipe and its manufacturing method with excellent non-contamination property to city water and high freedom of piping, capable of enhancing construction easiness at site. SOLUTION: An inner surface resin layer 2 having thickness of 0.05 mm or thicker is provided on an inner peripheral surface of an inner surface rubber layer 3 of a city water pipe 1 having a reinforcement layer 4 between the inner surface rubber layer 3 and an outer surface rubber layer 5. A flowing surface of city water is made of resin and contamination (transferring of a harmful component, adhesion of odor, discoloring or the like) to city water by the inner surface rubber 3 is prevented. Flexibility of the city water pipe 1 is ensured by making the thickness to 1.0 mm or thinner. Freedom in piping is enhanced and work such as cutting and joining to a fitting is also facilitated. COPYRIGHT: (C)2006,JPO&NCIPI
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