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
1. Rehabilitating water drainage pipes in a water plant in
Zhuhai, Guangdong, China. The ID of water pipe is 300mm.
Three sections of water pipes were rehabilitated and the total
length was 120 meters. Pipe-in Liner W series were installed.
2. Rehabilitating water main pipes in Xiamen, Fujian, China.
Four sections of water pipes were rehabilitated and the total
length was 600 meters. Pipe-in Liner W Series were
installed.
3. Rehabilitating water pipes in Rostov nuclear plant in
Russia. The ID of water pipes is 300mm. Ten sections of
water pipes were rehabilitated and the total length was about
1600m. Pipe-in Liner W series were installed.
4. Two projects of DN700 water pipes rehabilitation in China
are forthcoming.
