SPR™

32″ – 200″+ Pipe Lining　Round & Non-Round Shapes　100% Trenchless

The Round & Non-Round Liner for Large Diameter Pipe Rehabilitation

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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.

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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™ Lining Process

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The SPR™ Spiral Wound process is a trenchless rehabilitation solution for restoring the hydraulic efficiency, reliability, and integrity of aging sewers, storm drains, and culverts. 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.

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Once winding is completed, grout is introduced between the Spiral Wound 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.