This disclosure relates generally to corrugated pipe, and more particularly to corrugated pipe with an outer wrap. In one embodiment, a pipe includes an axially extended bore defined by a corrugated outer wall having axially adjacent, outwardly-extending corrugation crests, separated by corrugation valleys. The pipe also includes an outer wrap applied to the outer wall. The outer wrap may include fibers and plastic. The outer wrap may span the corrugation crests producing a smooth outer surface.

A new protective polymeric sheet is described wherein said polymeric sheet includes perforations and attached spacers that allow air and water circulation when the sheet is in use. The sheet protects underlying structures from damage while ensuring moisture migration between the protective polymeric sheet and the underlying structure. The protective polymeric sheet comprises a plurality of perforations extending through the sheet and a plurality of spacers, each spacer extending from a lower surface of the sheet adjacent to one side of each perforation. The spacers are created during perforation of the polymeric sheet. The protective polymeric sheet is useful in a number of applications, including without limitation: to protect pipelines; to replace geotextiles in heap leach processes; to line sandboxes and paving stones; to cover greenhouse floors; to make industrial or residential gutter caps; and as a filter.

The invention relates to a pipe having a thermoplastic casing surface and a glass-fibre-reinforced thermo-setting coating surrounding the thermoplastic casing surface. The thermo-setting coating is formed from multiple layers of glass-fibre matting or glass-fibre fabric, or a combination of the two, wherein the layers are applied to the thermoplastic casing surface in a wet-on-wet method using a vinylester, polyester or epoxy resin. According to the invention, an outer layer of the thermo-setting coating is formed from cross-wound glass-fibre fleece or glass-fibre fabric.

An apparatus includes a Polymer Thermal Expansion Based Passive Thermal Diode (PTE-PTD) that includes layers and is configured to provide passive heating and cooling of a pipeline. A polyurethane (PU) layer is provided that is configured to contact at least an upper portion along a length of a pipe. A polyethylene terephthalate (PET) layer is provided that is configured to surround the PU layer and the length of the pipe. A graphene layer is provided that is configured to surround an epoxy layer. An epoxy shell is provided that is configured to surround the graphene layer. An air gap on a first side of the PTE-PTD is provided. The air gap is formed by a void in the PET layer and is configured to provide additional air space between the PET layer and the PU layer. The air gap provides an upward movement of the PET layer using opposite forces of alternate sides of the PET layer. The PTE-PTD is installed on the pipeline.

The invention relates to a pipe having a thermoplastic casing surface a glass-fibre-reinforced thermo-setting coating surrounding the thermoplastic casing surface. The thermo-setting coating is formed from multiple layers of glass-fibre matting or glass-fibre fabric, or a combination of the two, wherein the layers are applied to the thermoplastic casing surface a wet-on-wet method using a vinylester, polyester or epoxy resin. According to the invention, an outer layer of the thermo-setting coating is formed from cross-wound glass-fibre fleece or glass-fibre fabric.

A pipe insulation system has a spacer wrap, an insulation material and a cladding. The spacer wrap has an upper surface and a lower surface. The upper surface of the spacer wrap has a plurality of convex protrusions. The upper surface is positioned against a pipe. The insulation material has an inner surface and an outer surface. The insulation material is positioned exterior to the lower surface of the spacer wrap. The cladding has an interior surface and an exterior surface. The cladding is positioned exterior to the outer surface of the insulation material.

Some embodiments of the present technology may encompass pipe insulation systems. The insulation systems may include an insulation member having an inner surface and an outer surface. The insulation systems may include a protective cladding having an interior surface and an exterior surface. The interior surface of the protective cladding may be disposed about the outer surface of the insulation member. The interior surface of the protective cladding may include an embossed texture formed from a plurality of protruding features and a plurality of recessed features. The plurality of protruding features may extend at least 1 mm beyond the plurality of recessed features.

This disclosure relates generally to corrugated pipe, and more particularly to corrugated pipe with an outer wrap. In one embodiment, a pipe includes an axially extended bore defined by a corrugated outer wall having axially adjacent, outwardly-extending corrugation crests, separated by corrugation valleys. The pipe also includes an outer wrap applied to the outer wall. The outer wrap may include fibers and plastic. The outer wrap may span the corrugation crests producing a smooth outer surface.

A coated tow includes a fiber bundle composed of continuous reinforcement fibers that form a flat substrate in a ribbon shape and a thermoplastic-based overcoating applied to the flat substrate to form a uni-directional tape. An extruded tape includes a plurality of cords of twisted fiber yarns each composed of continuous reinforcement fibers, a thermoplastic overcoating applied to each of the cords, and a high density polyethylene (HDPE) that encases the plurality of cords to form a uni-directional tape. The reinforcement fibers have continuous filaments aligned lengthwise along a length each of the cords. A process of producing the coated tow or extruded tape includes feeding one or more spools of continuous fiber tow under tension control, sinking the continuous fiber tow in a chemical bath, passing the wetted continuous fiber tow through one or more squeezing rollers, and passing the continuous fiber tow through an oven.

A heat-shrink sleeve is provided for covering a pipe joint formed between two pipes that are coupled to one another to form a tube. The heat-shrink sleeve comprises a heat-shrinkable material that is configured to conform to the first and second pipes when heated to cover the pipe joint.