Mortar- coated steel pipe (40) comprise a steel cylinder (42) having a mortar layer (44) disposed therein, such mortar layer (44) being free of any metallic reinforcement. An overcoat (46) is disposed over the mortar layer (44) and is formed from a material that is a dielectric and/or a barrier to moisture and oxygen entering the mortar layer, e.g., a polymeric material. The pipe (42) may include a further concrete or mortar layer (48) disposed over the overcoat (46), forming an outermost pipe surface. The outer layer can be cement, mortar, or other material. The mortar layer thickness is about 1.2 to 4 cm. The pipe is made by compression coating method, where mortar layer and overcoat are applied simultaneously. When an outer layer (48) is desired, it is preferably applied at the same time as the mortar layer (44) and the overcoat (46).
Pressure cast lined steel pipes comprise an annular concrete or mortar liner (14) along an inside diameter, and a metal shell (12) surrounding the liner, wherein the liner (14) is in direct contact with the metal shell (12). The wall thickness of the liner can be from 10 to 50 times the thickness of the metal shell The pipe may be coated with a dielectric material A mold assembly used to form the pipe includes an annular concrete or mortar composition chamber formed between the metal shell and an inner mold member Pressurized water is used in the mold assembly to pressurize the concrete or mortar composition and exert a desired pressure force onto the metal shell while the composition cures in the mold Once a desired degree of cure is achieved, the pressure is removed causing the metal shell to exert a desired compression force onto the cured liner
17 - Rubber and plastic; packing and insulating materials
Goods & Services
ACIDPROOF MATERIAL COMPOSED OF POLYVINYL RESINS COMBINED WITH INERT PIGMENTS AND PLASTIZERS FOR LINING OR COATING STEEL OR CONCRETE PIPES, STRUCTURES, TANKS, VATS, WALLS, AND FLOORS; [CHEMICAL-RESISTANT CAULKING COMPOUNDS;] SHEETS OF PLASTIC MATERIAL FOR SEALING POROUS SURFACES; SEALANTS AND CAULKING COMPOUNDS [; FIBERGLASS-REINFORCED PLASTIC PIPE AND FITTINGS, AND PIPE GASKETS]
17 - Rubber and plastic; packing and insulating materials
19 - Non-metallic building materials
20 - Furniture and decorative products
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
(1) Acid proof material composed of polymer vinyl resins combined with inert pigments and plasticizers, used for lining or coating steel or concrete pipes, structures, tanks, vats, walls, floors.
Poles of this invention have an annular body with a wall structure comprising a number of fiber reinforced resin layers, which can be positioned to form an inside and/or outside portion of the wall structure. A portion of the layers are oriented longitudinally within the wall structure, and the wall structure also includes radially-oriented fiber reinforced resin layers. The pole includes one or more layers or a core of a composite material or polymer mortar disposed within one or more locations of the wall structure, e.g., as an intermediate layer and/or as part of the wall inside and/or outside portion. The pole can include an outside surface resistant to ultra violet radiation. Poles of this invention can be formed using a continuous process on a rotating mandrel, making use of differently positioned stations to form the different portions of the pole as the fabrication is moved axially along the mandrel.
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
