A wrap tape cassette for a subsea pipeline repair or coating machine includes a drum for carrying a wrap tape wound on the drum. A housing defines an exit opening for the wrap tape to be dispensed from the drum onto a pipeline during a repair or coating operation. The drum may be mounted to the housing for rotational and longitudinal movement relative to the housing to dispense the wrap tape through the exit opening on being unwound from the drum. A leading end of the wrap tape may be attached to an anchor element that is arranged as a closure for the exit opening and, when moved from the exit opening, for attachment to a pipeline being repaired or coated.

A high-pressure pipe comprises an inner liner (1), an outer coating layer (6) and a reinforcement layer (2, 5) positioned between the inner liner and the outer coating layer. The reinforcement layer has helically wound strips (2, 5) which each comprise a matrix (4) and fibers (3) embedded in the matrix; the fibers consist of a multitude of twisted high-strength filaments. With an aim of providing a relatively high bending flexibility, the filaments of a fiber are sized filaments obtained by subjecting the filaments to a sizing operation.

A high-pressure pipe comprises an inner liner (1), an outer coating layer (6) and a reinforcement layer (2, 5) positioned between the inner liner and the outer coating layer. The reinforcement layer has helically wound strips (2, 5) which each comprise a matrix (4) and fibers (3) embedded in the matrix; the fibers consist of a multitude of twisted high-strength filaments. With an aim of providing a relatively high bending flexibility, the filaments of a fiber are sized filaments obtained by subjecting the filaments to a sizing operation.

A boiler tube reinforcement device reinforces a boiler tube including a weld portion. The reinforcement device includes: a strip-shaped first steel plate that is wound and fixed by welding in a region including the weld portion of the boiler tube; a first reinforcement member in surface contact with an outer peripheral surface corresponding to one semi-circumference of the boiler tube in an outer peripheral surface of the first steel plate wound around the boiler tube; a second reinforcement member in surface contact with an outer peripheral surface corresponding to another semi-circumference of the boiler tube in the outer peripheral surface of the first steel plate wound around the boiler tube, wherein the second reinforcement member covers the outer peripheral surface of the first steel plate together with the first reinforcement member; and a coupling member that couples the first reinforcement member and the second reinforcement member together around the boiler tube.

A process for manufacturing pipes using thermoplastic pipe and tape (continuous fiber, fully wetted in a similar thermoplastic as the pipe) that embeds the fibers into pipe surface. In one embodiment, an ambient temperature (72 degrees F.) tape is tightly wrapped around the cold pipe in a dry environment (relative humidity below 30). An external heat source is used to heat up the entire length of the pipe causing the thermoplastic to melt and the pipe to expand due to thermal expansion. Since the fibers have less stretch than the thermal expansion of the pipe the fibers will be embedded into the molten layer of the pipe, creating a permanent bond between the fibers and the pipe. A protective film is applied to the pipe. Portions of the tape and film are scraped from the surface of the pipe creating an area where the end of the pipe is coupled to another pipe using an electronic fusion coupler.

A process for manufacturing pipes using thermoplastic pipe and tape (continuous fiber, fully wetted in a similar thermoplastic as the pipe) that embeds the fibers into pipe surface. In one embodiment, an ambient temperature (72 degrees F.) tape is tightly wrapped around the cold pipe in a dry environment (relative humidity below 30). An external heat source is used to heat up the entire length of the pipe causing the thermoplastic to melt and the pipe to expand due to thermal expansion. Since the fibers have less stretch than the thermal expansion of the pipe the fibers will be embedded into the molten layer of the pipe, creating a permanent bond between the fibers and the pipe. A protective film is applied to the pipe. Portions of the tape and film are scraped from the surface of the pipe creating an area where the end of the pipe is coupled to another pipe using an electronic fusion coupler.

The present invention provides a metal pipe coated on at least a section of the metal pipe with a polyolefin coating system, wherein the system consists of the following layers: (a) optionally, a corrosion protective layer of a chromate, phosphate or other salt; (b) a polyolefin based adhesive, preferably in a thickness of 0.3-5 mm; (c) a PE or PP coating layer, preferably in a thickness of 1-10 mm; (d) optionally, an adhesion promoting layer between the polyolefin based adhesive and a PE or PP layer; wherein the polyolefin based adhesive contains an organic phase consisting of substantially saturated hydrocarbons, and wherein the adhesive contains amorphous polypropylene, ethylene-propylene copolymers or poly(iso)butylene (co)polymers, said adhesive being flowable when a pressure of 10 kgf/cm.sup.2 is applied, wherein the PE or PP coating is a continuous layer over the coated section, and wherein said polyolefin based adhesive adheres to both the metal pipe and to said PE or PP coating.

The present invention provides a metal pipe coated on at least a section of the metal pipe with a polyolefin coating system, wherein the system consists of the following layers: (a) optionally, a corrosion protective layer of a chromate, phosphate or other salt; (b) a polyolefin based adhesive, preferably in a thickness of 0.3-5 mm; (c) a PE or PP coating layer, preferably in a thickness of 1-10 mm; (d) optionally, an adhesion promoting layer between the polyolefin based adhesive and a PE or PP layer; wherein the polyolefin based adhesive contains an organic phase consisting of substantially saturated hydrocarbons, and wherein the adhesive contains amorphous polypropylene, ethylene-propylene copolymers or poly(iso)butylene (co)polymers, said adhesive being flowable when a pressure of 10 kgf/cm.sup.2 is applied, wherein the PE or PP coating is a continuous layer over the coated section, and wherein said polyolefin based adhesive adheres to both the metal pipe and to said PE or PP coating.

Embodiments herein are directed to an anti-corrosion tape comprising at least four plies. At least two plies of the anti-corrosion tape, in the form of carrier plies, include an at least single-layer carrier, and at least one layer of the carrier is designed as a carrier layer. At least one other ply of the anti-corrosion tape is designed in the form of a connection ply and includes at least one connection layer, wherein the connection layer includes a material selected from a group consisting of at least one butyl rubber and/or at least one polyisobutene, and the at least one connection ply is arranged between the two carrier plies. At least one other ply of the anti-corrosion tape is designed as an anti-corrosion ply and is arranged on at least one exposed surface of at least one support ply.

Embodiments herein are directed to an anti-corrosion tape comprising at least four plies. At least two plies of the anti-corrosion tape, in the form of carrier plies, include an at least single-layer carrier, and at least one layer of the carrier is designed as a carrier layer. At least one other ply of the anti-corrosion tape is designed in the form of a connection ply and includes at least one connection layer, wherein the connection layer includes a material selected from a group consisting of at least one butyl rubber and/or at least one polyisobutene, and the at least one connection ply is arranged between the two carrier plies. At least one other ply of the anti-corrosion tape is designed as an anti-corrosion ply and is arranged on at least one exposed surface of at least one support ply.