PE / PU Trenchless Pipe Rehabilitation For Aging Oil Pipeline Repairing

Pipe-in Liners are classified into four different series: Pipe-in Liner W Series, Pipe-in Liner O Series, Pipe-in Liner G series, and Pipe-in Liner H series.

►Pipe-in Liner W series are used to rehabilitate pressure pipelines, including water main pipes and force mains at normal temperature.

►Pipe-in Liner O series are used to rehabilitate oil pipes both onshore and offshore.

►Pipe-in Liner G series are used to rehabilitate gas pipes both onshore and offshore.

►Pipe-in liner H series are used to rehabilitate pipes in municipal heat system. Pipe-in liner H series can resist a temperature up to 95° C (203° F).

Furthermore, Asoe is the first company in the world to develop this type of solution to rehabilitate hot water pipes.

Besides liners, Asoe also supplies complete solutions and accessory equipment, including couplings to connect Pipe-in Liner with host pipes, equipment to install couplings, and technical consulting etc.

Pipe-in Liner solution is a semi-structurally independent rehabilitation technology. There is no connection between the host pipe and the liner; the liner works independently from the host pipe. The liner is rigid and maintains the round shape inside the host pipes when there is a vacuum inside the host pipe or when there is temporary external pressure on the host pipe.

ASTM installation guide and design guide are available upon request.

Connectors (PILC Couplings, Patent Protected)

•Choose section of host pipes to be rehabilitated

•Install by-pass hoses in order to keep transferring flow during

rehabilitating

•Dig construction pits at two ends

•Inspect pipes with a mobile TV camera and analysis of video recordings

•Mechanical coarse cleaning of host pipes with scraper pigs

•Clean host pipes by water jetting

•Position Pipe-in Liners at the start pit and the pulling winch at

destination pit

•Install pulling head onto liner

•Install hose guides

•Fold Pipe-in Liner into U-shape and bind the liner with scotch tape

•Pull liner into the host pipes

•Install PILC couplings onto the host pipes

•Hydrostatic pressure test or air pressure test

•Install transition pipes

•Recover transferring fluid

•Remove by-pass and close pit

In order to purchase correct liners to rehabilitate host pipes, the following information is required:

1.Normal operating pressure and temperature;

2.Media transferred inside the host pipes, such as

water,oil,gas, hot water, chemicals etc.

3.Materials and actual ID of host pipes, number of

bends,degrees of bends, etc.

4.The length of each section of host pipes which

Are supposed to be rehabilitated.

Rehabilitating oil pipes in Venezuela.The ID of oil pipes is

100mm. One section of oil pipes were rehabilitated and the

total length was 660m. Pipe-in Liner O series ware installed.

Pipe-in Liners hold the pressure from inside but not from outside.The host pipes must be able to hold the pressure from outside. If the host pipes collapse, Pipe-in Liner solution is not recommended.