SPR™ Spiral Wound Lining

32″ – 200″+ Pipe Lining

Round & Non-Round Shapes

100% Trenchless

SPR™ PVC Liner

32" - 200"+ Pipe Lining

Round & Non-Round

100% Trenchless

The Large & Non-Round Liner

SPR™ is a Spiral Wound pipe lining method for large diameter sewers, storm drains and culverts. SPR™ lines both round and non-round shapes, providing fully structural rehabilitation. 

The PVC profile strip is wound into the pipe by a traverse winding machine. The machine travels the length of the pipeline while constructing the liner at a fixed diameter. Grout is then introduced to fill the annular space; either part of the structural liner or just as a gap filler to uniformly transfer loads onto the liner. Grout type depends upon dimensions of the pipe and overall project conditions.

SPR™ Trenchless Lining Process

Videos, Projects & Articles

The Large & Non-Round Liner

SPR background for mobile

SPR™ lining occurs along a guide-frame constructed to mirror the pipeline’s shape. These shapes can be anything from a box, horseshoe, teardrop, arch etc. The SPR™ machine traverses the pipe while pulling PVC profile along to construct the trenchless pipe liner. 

Once winding is completed, grout (either structural/non-structural) is introduced between the liner and host pipe. Grouting occurs in lifts through ports installed within the liner. Once grouting is finished, the end result is a fully structural rehabilitated pipe.

Symbol for sewer pipe lining

Sewer Pipe Lining

Symbol for storm drain rehabilitation

Storm Drain Lining

Symbol for culvert rehabilitation

Culvert Lining

SPR™ Lining Process

SPR™ lining occurs along a guide-frame constructed to mirror the pipeline’s shape. These shapes can be anything from a box, horseshoe, teardrop, arch etc. The SPR™ machine traverses the pipe while pulling PVC profile along to construct the trenchless pipe liner.

Once winding is completed, grout is introduced between the liner and host pipe. Grouting occurs in lifts through a series of ports installed within the liner. Once grouting is finished, the end result is a fully structural rehabilitated pipe.  

PVC lining with SPR™ winding machine

Trenchless Lining Methods

3 Spiral Wound installation methods based upon pipe diameter

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