A manufacturing method of a high-pressure tank including a reinforcement layer configured of fiber reinforced resin including carbon fiber and a liner provided on an inner side of the reinforcement layer includes: a step (a) of preparing the reinforcement layer including a cylindrical portion and a pair of dome portions, the dome portions disposed at respective ends of the cylindrical portion; a step (b) of forming a film on an inner surface of each of the cylindrical portion and the dome portions without using a polymerization catalyst that is deactivated by a component contained in the reinforcement layer; a step (c) of applying a material of the liner to a surface of the film, the material being an uncured material of the liner and containing the polymerization catalyst; and a step (d) of forming the liner by curing the material of the liner applied through a polymerization reaction.

A manufacturing method of a high-pressure tank including a reinforcement layer configured of fiber reinforced resin including carbon fiber and a liner provided on an inner side of the reinforcement layer includes: a step (a) of preparing the reinforcement layer including a cylindrical portion and a pair of dome portions, the dome portions disposed at respective ends of the cylindrical portion; a step (b) of forming a film on an inner surface of each of the cylindrical portion and the dome portions without using a polymerization catalyst that is deactivated by a component contained in the reinforcement layer; a step (c) of applying a material of the liner to a surface of the film, the material being an uncured material of the liner and containing the polymerization catalyst; and a step (d) of forming the liner by curing the material of the liner applied through a polymerization reaction.

The invention relates to a device for hardening resin-impregnated lining tubes with high-energy radiation, comprising at least one radiation source for producing high-energy radiation and at least one power control device for regulating the electrical power output at the at least one radiation source, at least one nominal parameter representing the desired electrical power output of the power control device being adjustable or adjusted, and the actual power received from the at least one radiation source being measured by means of a measuring device and permanently compared with the nominal parameter, wherein in the event of falling short of the nominal parameter, the power control device increases the power output, and in the event of the nominal parameter being exceeded, the power output is reduced.

A rehabilitated pipe system and a method for rehabilitating a pipe system. A lines a host pipe and a coupling member configured for being operatively coupled to a mechanical coupler is positioned adjacent the host pipe so that a connecting section of the liner extends into the coupling member. The connecting section of the liner is adhesively bonded to the coupling member, and the mechanical coupler is installed to fluidly couple the liner to another fluid conducting structure. The connecting section of the liner can be formed in a portion of the host pipe that is removed after lining. The coupling member can be flanged or include a lateral coupling tube. The mechanical coupler can, e.g., be a ductile iron coupler or a bolt.

A rehabilitated pipe system and a method for rehabilitating a pipe system. A lines a host pipe and a coupling member configured for being operatively coupled to a mechanical coupler is positioned adjacent the host pipe so that a connecting section of the liner extends into the coupling member. The connecting section of the liner is adhesively bonded to the coupling member, and the mechanical coupler is installed to fluidly couple the liner to another fluid conducting structure. The connecting section of the liner can be formed in a portion of the host pipe that is removed after lining. The coupling member can be flanged or include a lateral coupling tube. The mechanical coupler can, e.g., be a ductile iron coupler or a bolt.

A delivery pipe for transport of solids, having a double-walled pipe body having an inner pipe and a metallic outer pipe and at least one pipe collar arranged on an end. The delivery pipe is distinguished in that the inner pipe is made of a solid plastic material and a wear ring is inserted in the pipe collar, the inner diameter of which ring is less than or equal to the inner diameter of the inner pipe.

A method for manufacturing a rolled retraction cord is provided. The method comprises the steps of: (A) preparing the sheet, the sheet comprising a first side edge and a second side edge opposite to each other; (B) placing the sheet on a first surface of a first forming member; (C) contacting the first side edge of the sheet with a second surface of a second forming member, the first side edge of the sheet sandwiched between the first surface of the first forming member and the second surface of the second forming member; and (D) applying a force via the first surface or the second surface to the sheet, and rolling the sheet from the first side edge to the second side edge to obtain the retraction cord. With this method, a rolled retraction cord with a smooth surface and enhanced ductility is capable of being provided.

A material for use in lining large-diameter pipes is disclosed. A textile material formed to a tubular shape and impregnated with resin may, on curing the resin, repair a damaged pipe in a cure in place pipe (CIPP) rehabilitation process. The present invention provides both a novel structure of tubular material and a novel method of preparing the material for use in a CIPP rehabilitation process, specifically aimed at large-diameter pipes such as oil rig caissons. The tubular material of this invention comprises four sheets of a double-bed warp-knitted fabric (40). A first pair of sheets (52) are arranged to form, respectively, inside and outside surfaces of a first half-tube, with fabric machine direction extending along the length of the half-tube. The second pair of sheets (52a) are similarly arranged to form a second half-tube. The two half-tubes are connected at a pair of longitudinally extending joins (58, 60). The preparation process includes stabilising tensioned sheets with a mesh layer (44), which makes for better handling of the knitted fabric.

A material for use in lining large-diameter pipes is disclosed. A textile material formed to a tubular shape and impregnated with resin may, on curing the resin, repair a damaged pipe in a cure in place pipe (CIPP) rehabilitation process. The present invention provides both a novel structure of tubular material and a novel method of preparing the material for use in a CIPP rehabilitation process, specifically aimed at large-diameter pipes such as oil rig caissons. The tubular material of this invention comprises four sheets of a double-bed warp-knitted fabric (40). A first pair of sheets (52) are arranged to form, respectively, inside and outside surfaces of a first half-tube, with fabric machine direction extending along the length of the half-tube. The second pair of sheets (52a) are similarly arranged to form a second half-tube. The two half-tubes are connected at a pair of longitudinally extending joins (58, 60). The preparation process includes stabilising tensioned sheets with a mesh layer (44), which makes for better handling of the knitted fabric.

The invention relates to a glass-reinforced plastic pipe liner of improved impact performance comprising layer B) from unsaturated polyester resin, optionally mixed with vinyl ester resin reinforced by non-woven fibres and a layer C) from unsaturated polyester resin, optionally mixed with vinyl ester resin reinforced by chopped fibre strands. At least one of these layers B) or C) comprises colour pigments at 0.2-5.0 wt %. The invention provides flexible liners for pressure and non-pressure GRP pipes. It improves impact performance of the pipe liner whilst offering also improvements in abrasion resistance, water jet resistance for high pressure cleaning without liner damage, increased expected lifetime by improved resistance to internal pressure and permits pigmentation of the liner. The invention also encloses a process for producing the glass-reinforced plastic pipe liner.