CompressionFit

TM

Governed by ASTM F3508, the CompressionFit HDPE pipe lining technology specifies an HDPE pipe with an outside diameter larger in size than the inside of the host pipe to be renewed. After the HDPE is butt fused to correspond to the pull distance, the pipe is pulled through a reduction die immediately before entering the host pipe. This reduces the HDPE pipe temporarily below the ID of the host pipe allowing it to be inserted.

While the towing load keeps the HDPE under tension during the pull, the pipe remains in its reduced size. The HDPE remains fully elastic throughout the reduction and installation process. After installation, the pulling load is removed. The HDPE pipe expands until it is halted by the inside diameter of the host pipe. The effectively natural ‘tight’ or ‘compression fit’ is accepted as exchanging an existing failing pipeline with a composite pipe in its place.

History of CompressionFit

Science of CompressionFit

SPECIFICATIONS

Increased Flow Rates Over Slip Lining

Tight fitting HDPE provides maximum Internal Diameter delivering greatest flow
Smooth wall of HDPE (150 c-factor) reduces friction and pumping costs
No grouting is required due to compressive tight fit of new HDPE

Minimal Schedule
and Impact

Production rates of up to 5,000 feet in a single pull
91% less excavation than open cut

Solution to the Problem

Fully structural HDPE can be installed if the host pipe has no integrity
Semi-structural HDPE can be installed if the host pipe has some integrity, yet increase strength, span holes and provide corrosion protection
Thin walled HDPE can be installed if the host pipe is sound, but joints are leaking or corrosion protection is required

Existing Utility Path Followed

No available easement? We won't need one
Design hours reduced as utility relocates are irrelevant

VIEW OUR RECENT COMPRESSIONFIT PROJECTS