A resin composition and method for installing a pipe liner that allows the liner to be fully wet out with a resin and activator and stored for a period of up to six months prior to installation and curing. A method of lining a pipe with a delayed curing resin composition is also provided that includes fully wetting out a liner with a blended two part epoxy composition such that the liner can be transported in a wet out fashion, placed in a pipe to be lined and repositioned as needed without concern for the resin composition to begin curing.

An assembly for relining a junction between a branch pipeline and a main pipeline comprises a seal installation device capable of moving within the main pipeline to the junction. The seal installation device includes a curable seal for being placed and pressed onto the junction and optionally for extending into the branch pipeline. The assembly further comprises a light curing device for being introduced into the seal installation device within the main pipeline and the branch pipeline for curing the seal.

In order to further improve a method and a device for rehabilitating a pipe section, wherein the rehabilitation device has at least one tube-shaped inliner for sealing damage to the pipe section and a heating element, in such a way that the rehabilitation may be carried out more easily, safer, and more economically, it is proposed to design the heating element as a tube-shaped and electric heating element and to arrange it essentially across an entire length of the inliner arranged within the pipe section, and to cure the inliner essentially along the entire length in one step by means of the tube-shaped electric heating element.

A resin composition and method for installing a pipe liner that allows the liner to be fully wet out with a resin and activator and stored for a period of up to six months prior to installation and curing. A method of lining a pipe with a delayed curing resin composition is also provided that includes fully wetting out a liner with a blended two part epoxy composition such that the liner can be transported in a wet out fashion, placed in a pipe to be lined and repositioned as needed without concern for the resin composition to begin curing.

Cured-in-place pipe lining repair is a way to access and repair a pipe or pipe section in a trenchless manner. A resinous material is positioned in a pipe and is cured, which creates a repaired wall or surface for the pipe. A light curable resin can be cured with the introduction of illumination in the pipe, such as via a light source. To aid in reducing the curing time for the resin, a liner saturated with the resin, a scrim, and/or a bladder used to press the resin towards the wall of the pipe can be manufactured with a light source, such as one or more fiber optic lines or strings. The lights can be incorporated along the full length of the pipe being repaired and activated along the length to cure the resin along the length at the same time, which reduces the time needed for curing.

A leak repair device for a pipe comprises a tubular member having an interior surface and an exterior surface with an adhesive or other bonding agent applied to the exterior surface of the tubular member. The tubular member includes a plurality of folds configured to allow the tubular member to expand and contract. This feature allows the leak repair device to be delivered internally to a location within the pipe and then expanded to form a proper seal. An exemplary fold pattern would be the waterbomb origami tube pattern, which can be formed from a single continuous sheet. The aforementioned leak repair device may form a kit with a deployment mechanism operable to inflate the leak repair device at a given location within the damaged pipe.

A steam generator for use with a liner assembly for pipeline repair or reinforcement, includes: a water heater configured to heat water to generate steam; a water feed conduit configured to convey water to the water heater; an air heater configured to generate heated air; an air supply conduit configured to convey pressurized air to the air heater; a heated air supply conduit configured to convey heated air from the air heater to the water heater to yield a steam-air mixture; and an output conduit configured to convey the steam-air mixture from the water heater. An automated steam generator system including the steam generator is also described.

A method for relining a pipeline includes providing and using a composition that includes (a) a resin crosslinkable by action of a photoinitiator that is activated with actinic light, (b) a resin crosslinkable by action of a co-hardening compound; (c) a photo-initiator compound that can be photoactivated by irradiation with actinic light; and (d) a co-hardener compound added before use that is a semilatent co-hardener or a co-hardener at room temperature. A kit for relining a pipeline according to this method includes (1) a container containing (a), (b) and (c); (2) a container containing (d); (3) a substrate for impregnation with the composition resulting from mixing the contents of container (1) and container (2); and, optionally, (4) a source of actinic light and a generator of a flow of gas or liquid at adjustable pressure.

A lining tube for rehabilitating pipelines includes inner, outer, and middle tube layers. The middle tube layer includes a seamless fabric formed from warp threads and weft threads. The warp threads run in a longitudinal direction and the weft threads run in a circumferential direction relative to the lining tube. The weft threads exhibit a greater elasticity than do the warp threads. The lining tube is capable of expanding in diameter by up to 50% from a pressureless state to a pressurized state without tearing or rupturing. A method for retrofitting a pipeline involves pulling a lining tube into the pipeline, expanding the lining tube using pressurized air so as to press an outer tube layer of the lining tube against an inside surface of the pipeline, and maintaining the lining tube in a pressurized state using the pressurized air until a resin in the lining tube cures and hardens.

A method of manufacturing a length of lined pipe comprises inserting a radially-contracted liner pipe into an outer host pipe. Injector needles are inserted through an end of the outer pipe into an annular gap between the pipes. Adhesive is injected between the pipes at locations inboard of the end of the outer pipe. After withdrawing the injectors, at least a portion of the liner pipe is expanded to close the gap and to bond the pipes together via the injected adhesive. Shims may be inserted into the gap between the pipes. A portion of the liner pipe inboard of the shims may be expanded radially while the shims constrain local radial expansion of an outboard portion of the liner pipe to maintain the gap for accommodating the injectors. Withdrawing the shims after injecting the adhesive allows radial expansion of the outboard portion to close the gap between the pipes.