Fitting for double pipe
    7.
    发明专利

    公开(公告)号:JP4014349B2

    公开(公告)日:2007-11-28

    申请号:JP2000047529

    申请日:2000-02-24

    Inventor: 由和 高松

    CPC classification number: F16L39/005 B60H1/00342 B60H1/00571

    Abstract: In the joint (40) for duplex pipes, a clearance between the first outer pipe seal unit (110) and the second outer pipe seal unit (210) is defined larger than a clearance existing between the first inner seal portion (120) and the second inner pipe seal unit (220). Furthermore, the wire diameter of the O-ring (301) which functions as the sealing member for the outer pipe is defined larger than the wire diameter of the O-ring (401) which functions as the sealing member for the inner pipe.

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