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1. (WO2018042246) MECHANICALLY LINED PIPE HAVING AN INNER POLYMER LINER

Pub. No.:    WO/2018/042246    International Application No.:    PCT/IB2017/001160
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Sat Aug 26 01:59:59 CEST 2017
IPC: F16L 58/08
F16L 58/10
F16L 1/12
F16L 9/147
B29C 63/42
Applicants: TECHNIP FRANCE
Inventors: CHALMERS, Martin
RAI, Jitender
TKACZYK, Tomasz
Title: MECHANICALLY LINED PIPE HAVING AN INNER POLYMER LINER
Abstract:
This invention relates to a mechanically lined pipe (1) comprising a host pipe (5) having an inner surface (5a) which is lined with a metallic liner (10), the metallic liner having an inner surface which is lined with a polymer liner (110) which presses the metallic liner against the inner surface of the host pipe, as well as to methods of reeling and unreeling the mechanically lined pipe. This invention also relates to a method of making a mechanically lined pipe having an internal polymer liner, the mechanically lined pipe (1) comprising a host pipe (5) having an inner surface (5a) which is lined with a metallic liner (10), the method comprising the steps of: (a) providing a mechanically lined pipe having an internal diameter, (b) providing a polymer liner (110) having an outer diameter which is greater than the internal diameter of the mechanically liner pipe, (c) reducing the outer diameter of the polymer liner such that it is less than the internal diameter of the mechanically liner pipe, (d) inserting the polymer liner into the mechanically lined pipe, and (e) allowing the polymer liner to expand such that it presses the metallic liner against the inner surface of the host pipe.