Abstract

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).

IPC Classes  ?

• F16L 9/02 - Rigid pipes of metal
• F16L 58/06 - Coatings characterised by the materials used by cement, concrete, or the like
• F16L 58/10 - Coatings characterised by the materials used by rubber or plastics

Abstract

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

IPC Classes  ?

• B28B 11/00 - Apparatus or processes for treating or working the shaped articles
• F16L 58/06 - Coatings characterised by the materials used by cement, concrete, or the like
• F16L 9/02 - Rigid pipes of metal
• F16L 9/08 - Rigid pipes of concrete, cement, or asbestos cement, with or without reinforcement

Abstract

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.

IPC Classes  ?

• 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
• B32B 1/08 - Tubular products
• B32B 27/04 - Layered products essentially comprising synthetic resin as impregnant, bonding, or embedding substance
• B32B 27/16 - Layered products essentially comprising synthetic resin specially treated, e.g. irradiated
• E04H 12/02 - Structures made of specified materials
• H02G 7/00 - Overhead installations of electric lines or cables