Abstract:
Pipe joint coating for welded ends of pipes forming a pipeline, where the last and third layer of a 3LPP coating system covering at least a circumferential weld area of the pipe joint is a heated sheet (20) applied around the pipe with a machine having a mounting frame and a transport carriage rotatably movable on the mounting frame to move circumferentially about the pipe joint, and a roller (6) applying an adjusted pressure to the sheet against the pipe, the roller adapting to any eccentricity or ovality of the pipe. The sheet is pressed below the pipe at a location of the sheet away from its overlapping ends (30, 31 ), a first part of the sheet is then applied when the roller is rolled in a first direction, and a second part of the sheet is applied by the roller rolled back in the reverse direction around the pipe. The sheet is dimensioned to obtain an overlapped area between both extremities of the same sheet.
Abstract:
A method of applying protective sheeting (9) of polymer material to a pipeline (1) extending along a longitudinal axis (A1) and having a cutback (8) bounded at opposite axial ends by two end portions (10) of respective protective coatings (5) of polymer material, the method including directly heating the free faces of the end portions (10); extruding and simultaneously winding about the pipeline (1) a protective sheeting (9) wide enough to cover the cutback (8) and the end portions (10); and compressing the protective sheeting (9) against the pipeline (1), the end portions (10) included.
Abstract:
A roller (10) for compressing protective sheeting (9) of polymer material around a pipeline (1) rotates about a given axis of rotation (A2) and has a shaft (13); and a first tubular portion (14) which extends about the shaft (13) and varies in elasticity along the given axis of rotation (A2); more specifically, the first tubular portion (14) is of greater elasticity at the ends of the roller than at the centre of the roller (10).
Abstract:
A heat curable, circular knitted fabric includes reinforcing and meltable resin fibers that can be cured to form a more rigid material form. In one embodiment, the fabric includes a core spun yarn, wherein the core may be made from glass, carbon, basalt, aramid or metal. The wrap surrounding the core may include resin type fibers such as Poly(p-phenylene sulfide) PPS, Polyetherimide (&Rgr;&Egr;I), Polyether ether ketone (PEEK), Polysulfone (PES), Polyphthalamide (PPA), nylon, polyester, or polypropylene.
Abstract:
A method is provided for the production of structural cylinder with a wound material shell, the method comprising : providing a extruded wood core cylinder; wrapping a flexible material about an exterior surface of the cylinder; applying an adhesive between the interior of the material and the exterior profile of the core; allowing the adhesive to cure providing a structural cylinder with a wrapped material exterior.
Abstract:
An apparatus and method for applying a protective material to the girth weld of pipe. The apparatus is particularly suited for protecting a pipe that, except for the ends adjacent to the weld, is protected by layer of a semi-interpenetrating polymer network of epoxy and polyolefin resins. Using the apparatus and method, the protective material is firmly bonded to both the exposed steel end and the pre-existing protective layer.
Abstract:
An axial reinforcement system is disclosed that provides a shell (i.e., a form or jacket) that protects a weight-bearing member (e.g., a cement column) from a corrosive environment and which also substantially increases the structural capacity of the weight-bearing member. The shell is integrated with "positioners" and reinforcing elements, the combination of which offers several advantages over conventional shells. The positioner is attached directly to the shell and the positioner is, in turn, secured to a reinforcing element, which can be a reinforced steel, such as rebar, or a carbon fiber reinforced polymer material. The axial reinforcement system has been found to substantially increase the structural rigidity of the weight-bearing member, while at the same time protecting the weight-bearing member from corrosion and is also simple to install.
Abstract:
An applicator includes a cylindrical core having an interior surface and an exterior surface. A backing layer is attached to at least a portion of the exterior surface of the cylindrical core. A fabric material is attached to at least a portion of the backing layer. The fabric material is formed of polytetrafluoroethylene (PTFE).