| CIP liners for high-pressure pipelines |
 |
 Pressure drum for up to 2000 ft. of HPL |
In
a joint R&D project, Karl Weiss of Germany and GTI as partner
and sponsor, completed product refinements as well as development
and testing of the new High-Pressure Liner (HPL) installation equipment
for natural gas pipelines. The first field installation of the new HPL in the U.S. was hosted by KeySpan in 2004 using the installation procedure, the equipment and tools designed to maximize the product's capabilities. This field installation represents a successful project completion. It is the culmination of several years of R&D and considerable investment by technical organizations and utilities. The project has been challenging but we are committed to providing gas operators with a reliable and long-term trenchless method for extending the useful life of high-pressure pipelines. |
For applications, such as
- actual or potential corrosion fractures,
- preventive protection against internal corrosion,
- sealing of culverts, railroad underpasses and nature reserves,
- preventive sealing of fracture-prone weld seams
For rehabilitation of gas transmission pipes, currently up to 24" (larger diameters for large projects on request) and a maximum operating pressure of 250 psi. Test according to German DVGW VP 404 passed successfully. DVGW certificate has been awarded in August 2002.
Based on the results, the starline®HPL-G system has a use expectancy of at least 50 years in structurally sound pipes with an internal pressure of 450 psi (30 bar) for bridging corrosion pits up to 2" (50 mm) in diameter.
With a modified liner coating, this technology is called starline®HPL-W. It can be used for drinking water transmission pipes (see starline®1000)