- Patent Title: Improving the bending behaviour of mechanically-lined rigid pipe
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Application No.: US15538193Application Date: 2015-12-18
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Publication No.: US10406577B2Publication Date: 2019-09-10
- Inventor: Gregory Alexandre Toguyeni
- Applicant: Acergy France SAS
- Applicant Address: FR Suresnes
- Assignee: Acergy France SAS
- Current Assignee: Acergy France SAS
- Current Assignee Address: FR Suresnes
- Agency: Levy & Grandinetti
- Priority: GB1423227.6 20141224
- International Application: PCT/IB2015/002551 WO 20151218
- International Announcement: WO2016/103038 WO 20160630
- Main IPC: F16L9/00
- IPC: F16L9/00 ; B21C37/15 ; B21D39/04 ; F16L58/10 ; F16L1/20 ; F16L9/02 ; F16L58/08

Abstract:
A method of making mechanically-lined pipe with primary expansion by plastically expanding a liner sleeve within an outer pipe, under lining pressure applied internally to the liner sleeve. On relieving the lining pressure, elastic radial contraction of the outer pipe makes a mechanical bond between the outer pipe and the liner sleeve. Then, secondary expansion of the outer pipe is performed under fixing pressure, which may be greater than the lining pressure, applied internally to the liner sleeve at an end portion of the pipe. This makes or strengthens a mechanical bond at the end portion. The resulting pipe joint has an end portion and a body portion inboard of the end portion. The body portion has a first, lesser bonding pressure between the outer pipe and the liner sleeve. The end portion has a second, greater bonding pressure between the outer pipe and liner sleeve.
Public/Granted literature
- US20170341119A1 Improving the Bending Behaviour of Mechanically-Lined Rigid Pipe Public/Granted day:2017-11-30
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