Method for joining high-pressure composite pipes
US7094310B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2003 |
| Grant date | Aug 22, 2006 |
| Priority date | — |
| Expiry date | Sep 30, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1393
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.