Method for rehabilitating a pipe with a liner having an electrically conductive layer

A method for rehabilitating and lining a pipe comprising the steps of:

• providing a tube of lining around a tubular shaped inflatable bladder, said lining having a first end and an opposing second end, said lining comprising a conductive woven graphite fiber layer;
• impregnating said lining with a resin;
• positioning said lining and said bladder along an interior section of a hollow pipe line having a substantially tubular shaped interior wall;
• inflating said bladder so that said lining is urged against said interior wall;
• providing a source of electrical power;
• coupling said source to said woven graphite fiber layer at said first end of said tube of lining through a first power line and coupling said source to said woven graphite fiber layer at said second end of said tube of lining through a second power line;
• and
• causing an electrical current to flow through said woven graphite fiber layer sufficient to resistively heat said woven graphite fiber layer to enhance curing of said resin impregnated within said lining.

A method of rehabilitating a pipe comprising the steps of:

• providing a tube of lining having a first end and an opposing second end, said lining comprising a conductive woven graphite fiber layer and a bladder;
• impregnating said lining with a resin;
• positioning said tube of lining along an interior section of a hollow pipe having an interior wall;
• urging said lining against said interior wall;
• providing a source of electrical power;
• coupling said source to said woven graphite fiber layer at said first end of said tube of lining through a first power line and coupling said source to said woven graphite fiber layer at said second end of said tube of lining through a second power line;
• and
• causing an electric current to flow through the woven graphite fiber layer to resistively heat said woven graphite fiber layer to enhance curing of said resin impregnated in said lining.

A method of rehabilitating a pipe comprising the steps of:

• providing a lining having a first layer of polyester, a second layer of polyester and a conductive layer of woven graphite fiber disposed between said first layer and said second layer;
• needle punching said layers to mechanically bind and interlock said layers;
• forming said layers into a tubular shape having a first end and a second end, said tubular shape comprising a bladder;
• impregnating said lining with a heat curable resin;
• positioning said lining along an interior section of a hollow pipe having an interior wall;
• inflating the bladder to urge said lining against said interior wall;
• providing a source of electrical power;
• coupling said source to said layer of woven graphite fiber at said first end of said tube of lining through a first power line and coupling said source to said layer of woven graphite fiber at said second end of said tube of lining through a second power line;
• and
• causing an electric current to flow through said power lines and said conductive layer to resistively heat said conductive layer to enhance curing of said resin impregnated in said lining.

A method of rehabilitating a pipe comprising the steps of:

• providing a tube of lining extending lengthwise from a first end to an opposing second end, said lining comprising a conductive woven graphite fiber layer and a bladder;
• impregnating said lining with a resin;
• positioning said tube of lining along an interior section of a hollow pipe having an interior wall;
• urging said lining against said interior wall;
• providing a source of electrical power;
• coupling said source to said woven graphite fiber layer only at a first end position through a first power line and coupling said source to said woven graphite fiber layer only at a second end position spaced lengthwise from said first end position through a second power line;
• and
• causing an electric current to flow through the woven graphite fiber layer from said first power line to said second power line to resistively heat said woven graphite fiber layer to enhance curing of said resin impregnated in said lining.