Method for joining high-pressure composite pipes

Details Method for joining high-pressure composite pipes Method for joining high-pressure composite pipes

2006-08-22

2006-08-22

Fischer, Justin (Department: 1733)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S304200, C156S304300, C156S304600, C138S137000, C138S140000, C138S155000

Reexamination Certificate

active

07094310

ABSTRACT:
A high-pressure composite pipe includes a pipe-shaped inner layer made of a synthetic resin, and a reinforcing layer made of a stretched polyolefin resin sheet and wound on an external circumferential surface of the inner layer, with a winding direction of the reinforcing layer being oriented at a predetermined angle relative to an axis of the pipe, and a method for joining high-pressure composite pipes each including a pipe-shaped inner layer made of a synthetic resin, a reinforcing layer made of a stretched polyolefin resin sheet and wound on an external circumferential surface of the inner layer, and an outer layer made of a synthetic resin and laminated on the reinforcing layer. A method for joining high-pressure composite pipes includes the steps of: heating and melting an end of each high-pressure composite pipe, flaring the melted end of each high-pressure composite pipe, with a diameter thereof gradually enlarging toward an end face thereof, and butting the flared ends of both flared high-pressure composite pipes together and fusing internal circumferential surfaces of their inner layers, with their reinforcing layers being turned outwardly.

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