Hitachi Zosen Corporation

Tomoyoshi Kanazawa

Masahiko Yamamoto

Yoshinori Nishino

Tadayoshi Uda

Kenji Nakagawa

A pipe joint wherein an annular connecting resin body in contact and engagement with the outer periphery of one end of at least one pipe is used for connecting the end of the pipe to one end of another pipe. The joint comprises a device for reinforcing the bond between said one pipe and the connecting resin body in addition to sanding provided for the outer periphery of the end of said one pipe. The bond reinforcing device is a barbed wire, barbed tape, piano wire or the combination of engaging grooves and engaging projections, which prevents the axial displacement of said one pipe relative to the resin body to avoid cracking due to such displacement.

Pipe joint

A structure at a connection where at least two resin pipes are connected to each other end-to-end. The structure is characterized by annular resin body means provided on the inner periphery of the end of at least one of the resin pipes and having at least one end positioned in an annular recessed portion formed in the inner periphery of said one resin pipe. Since the above-mentioned end (which is more subject to the action of internal fluid than the other end) is positioned in the annular recessed portion, the resin body means is not eroded by the internal fluid.

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Kobe, Japan

Tomoyoshi Kanazawa