Scrim-enforced pipe liner
View Patent ↗Stretch-resistant liners for lining pipes, pipes lined with stretch-resistant liners, and methods for lining pipes with stretch-resistant liners. The liners are made from a lamination that includes a sealing layer, a strength layer of stretch-resistant woven material that overlies the sealing layer, a support layer of non-woven resin-impregnated material that overlies the strength layer, and a barrier layer that overlies the support layer. The lamination is rolled into a tube and inverted when inserted into a pipe so that the barrier layer is the layer that abuts the interior wall of the pipe, the support layer underlies the barrier layer, the strength layer underlies the support layer and the sealing layer underlies the strength layer is contacted by materials flowing through the pipe.
1. A stretch-resistant liner for a pipe, comprising:
a flat, flexible strength layer of cross-hatched fiberglass fibers;
a flat, flexible support layer of a felt base made from non-woven fabrics impregnated with curable resins disposed in overlying relation to said layer of cross-hatched fiberglass fibers;
said flat, flexible strength layer of cross-hatched fiberglass fibers and said flat, flexible support layer of a felt base being sandwiched between a sealing layer and a barrier layer;
said sealing layer being in contact with said strength layer of cross-hatched fiberglass fibers and said barrier layer being in contact with said support layer;
wherein the liner is configured to be inverted into a pipe such that the barrier layer is adjacent a pipe wall and the sealing layer is the innermost layer in the pipe.
2. The liner of claim 1 , further comprising:
said flat, flexible strength layer of cross-hatched fiberglass fibers, said flat, flexible support layer of a felt base, said sealing layer and said barrier layer being formed into a cylindrical configuration so that said barrier layer is in a radially innermost position, said support layer is radially outwardly of said barrier layer, said strength layer is radially outward of said support layer, and said sealing layer is radially outward of said strength layer.
3. The liner of claim 2 , further comprising:
said flat, flexible strength layer of cross-hatched fiberglass fibers, said flat, flexible support layer of a felt base, said sealing layer and said barrier layer being formed into said cylindrical configuration and inverted into a pipe lumen so that said barrier layer is in a radially outermost position and is adapted to contact said lumen of said pipe, said support layer is radially inwardly of said barrier layer, said strength layer is radially inward of said support layer, and said sealing layer is radially inward of said strength layer.
4. The liner of claim 1 , further comprising:
said support layer being made from non-woven fabrics impregnated with curable resins.
5. The liner of claim 1 , further comprising:
said barrier layer formed from a flexible film of air impermeable plastic.
6. The liner of claim 1 , further comprising:
said strength layer comprising a flexible stretch-resistant scrim.
7. A pipe lined with a stretch-resistant liner, comprising:
said pipe having a radially innermost surface and a radially outermost surface;
a support sleeve of non-woven fabrics impregnated with curable resins having a radially innermost surface and a radially outermost surface;
a strength sleeve of cross-hatched fiberglass fibers having a radially innermost surface and a radially outermost surface;
a sealing sleeve having a radially innermost surface and a radially outermost surface;
a barrier sleeve having a radially innermost surface and a radially outermost surface;
said radially outermost surface of said sealing sleeve disposed in abutting relation to said radially innermost surface of said strength sleeve;
said radially outermost surface of said strength sleeve disposed in abutting relation to said radially innermost surface of said support sleeve;
said radially outermost surface of said support sleeve disposed in abutting relation to said radially innermost surface of said barrier layer; and
said radially outermost surface of said barrier layer adapted to be disposed in abutting relation to said radially innermost surface of said pipe.
8. A method for lining a pipe with a stretch-resistant liner, comprising the steps of:
providing a flexible support sleeve of non-woven fabrics impregnated with curable resins having a radially innermost surface and a radially outermost surface and disposing said flexible support sleeve in a cylindrical configuration;
providing a flexible strength sleeve of cross-hatched fiberglass fibers having a radially innermost surface and a radially outermost surface;
mounting said flexible strength sleeve in circumscribing relation to said flexible support sleeve in overlying relation to said radially outermost surface of said flexible support sleeve;
applying a barrier layer to said radially innermost surface of said flexible support sleeve;
applying a sealing layer to said radially outermost surface of said flexible strength sleeve; and
introducing said flexible support sleeve and said flexible strength sleeve into a pipe lumen by inverting said flexible support sleeve and said flexible strength sleeve so that said barrier layer is adapted to abut said interior wall of said pipe and so that said sealing layer is adapted to protect said flexible strength sleeve and said flexible support sleeve from materials flowing within said lumen of said pipe.