Method for lining a pipe or main

USRE36859E · kind E · reissue

Assignee

• BG plc · GB

Inventor

• Brian Walter Storah, deceased · Nantwich, GB

Key dates

• Filing date: Dec 13, 1996
• Grant date: Sep 12, 2000
• Expiry date: Dec 13, 2016

Classification

• Technology area (CPC —): General

Abstract

A method for lining a pipe or main comprising heating a length of synthetic-resin liner pipe 20 of external diameter substantially equal to or greater than the internal diameter of the pipe or main 40 to be lined, mechanically deforming the heated liner pipe 20 to reduce its external diameter to less than the internal diameter of the pipe or main 40 to be lined, causing the liner pipe 20 to enter the pipe or main 40 to be lined and pressurizing the internal wall of the liner pipe 20 to cause it to expand into engagement with the internal wall of the pipe or main 40 to be lined.