| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe end corrosion-proof joint easy to manufacture and capable of surely preventing a fluid leakage from a connection part by connecting a lining steel pipe while preventing damage and exhibiting high sealing performance when connecting any lining steel pipe such as a powder lining steel pipe with a large inner diameter or a polyvinyl chloride lining steel pipe with a small inner diameter. SOLUTION: The pipe end corrosion-proof joint has a resin seal ring 30 mounted to the tip outer periphery of a cylindrical part 22. The seal ring 30 is formed with a sealing fin 32 on the connection opening side of the outer peripheral surface 31a of a ring body 31, and a supporting fin 33 on the inner side outer peripheral surface of the fin 32. The sealing fin 32 is formed to be larger than the inner diameter d<SB>50</SB>of the powder lining steel pipe 50, and the supporting fin 33 is formed to be smaller than the inner diameter d<SB>50</SB>of the steel pipe 50. COPYRIGHT: (C)2008,JPO&INPIT
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