CUIRE is a research, education and outreach organization and part of the University of Texas at Arlington’s (UTA) Department of Civil Engineering. Since its inception in 2002, CUIRE has focused on assembling exceptional and broad-reaching engineering and technical talent to address the needs of underground infrastructure on a regional, state, national and international scale.
Through a research contract with Asoe Hose Manufacturing Inc., China, for its Pipe-in Liner product, CUIRE will develop a complete design guide with equations and sample calculations, and an installation guide that includes pre-planning, planning, installation, delivery, and closeout and safety precautions. Both these documents will be prepared for the U.S. market. Pipe-in Liner is a fabric-reinforced, flexible plastic pipe (FRFPP), as shown above.
The Asoe’s Pipe-in Liner product is a trenchless method using lining with inserted hoses to renew water, gas and oil pipelines, and are classified into four different series:
- Pipe-in Liner W series to rehabilitate water main pipes and other types of water pressure pipes at normal temperature
- Pipe-in Liner O series to rehabilitate oil pipes onshore or offshore
- Pipe-in Liner G series to rehabilitate gas pipes onshore or offshore
- Pipe-in Liner H series to rehabilitate pipes in municipal hot water systems. The H series can resist temperatures up to 203 degrees F. Asoe is the first in the world to develop this type of solution to renew hot water pipes.
The Pipe-in Liner can be used to install a liner where pressure rating is greater than that of the host pipe, and where the host pipe is in structurally sound condition but has localized corrosion perforations and/or leaking joints. The new pipe must be reduced in diameter as a separate operation prior to installation into the host pipe. Long, continuous lengths can then be inserted in a single operation. Depending on site conditions, section lengths up to 13,000 feet can be inserted in a single pull. This method is available over a range of diameters, from 5 to 40 inches.
Asoe manufactures different hoses, including through-the-weave polyurethane (PU) lay-flat hoses and fire hoses. Jacketed fire hoses are lined with ethylene propylene diene monomer (EPDM), polyurethane (PU), nitrile butadiene rubber (NBR), PVC and natural rubber (NR). Asoe designs and manufactures hose couplings, which work with its hoses, according to different technical requirements in different applications. The materials applied in couplings are aluminum, carbon steel, stainless steel and PE.