Abstract

Described is a method for manufacturing coated pipe sections having a hollow conduit or an electrical cable within the coating. Also described are such pipe sections. The hollow conduit may be used to place sensors, fiber optics, or heating cable within the coating.

IPC Classes  ?

• F16L 58/10 - Coatings characterised by the materials used by rubber or plastics
• F16L 53/38 - Ohmic-resistance heating using elongate electric heating elements, e.g. wires or ribbons
• B29C 48/09 - Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
• B29C 48/151 - Coating hollow articles
• F16L 9/147 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
• F16L 9/19 - Multi-channel pipes or pipe assemblies

Abstract

A multi layer pipe coating for steel pipe, and a method of production of same. The multi layer coated steel pipe has a first layer of coating, which is an anti-corrosion coating, a second layer of coating, comprising a thermoplastic selected from the group consisting of polyphenylene sulfide, polypropylene, and polystyrene, an epoxy intermediate layer between the second layer of coating and a third layer of coating, and a third layer of coating, which comprises a thermoplastic selected from the group consisting of polyphenylene sulfide, polypropylene and polystyrene. The second layer of coating and the third layer of coating comprise different thermoplastics.

IPC Classes  ?

• F16L 9/147 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
• F16L 58/10 - Coatings characterised by the materials used by rubber or plastics
• B05D 7/14 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies

Abstract

Described is a method for manufacturing coated pipe sections having a hollow conduit or an electrical cable within the coating. Also described are such pipe sections. The hollow conduit may be used to place sensors, fiber optics, or heating cable within the coating.

IPC Classes  ?

• F16L 58/10 - Coatings characterised by the materials used by rubber or plastics
• F16L 9/147 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
• F16L 9/19 - Multi-channel pipes or pipe assemblies
• F16L 53/38 - Ohmic-resistance heating using elongate electric heating elements, e.g. wires or ribbons
• B29C 48/09 - Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
• B29C 48/151 - Coating hollow articles

Abstract

A method of coating a field joint, pipe sections for forming a coated field joint, and a coated field joint formed thereby. First and second angular cut backs are provided in the parent coating of each pipe section. The first angular cut back is at an angle of about 30°+−0.5° relative to the longitudinal axis of the field joint, and the second angular cut back is positioned further from the field joint than the first angular cut back. The first and second angular cut backs result in the parent coating having a stepped profile, a step in the stepped profile between the first and second angular cut backs, the step is substantially parallel to the longitudinal axis of the field joint and is often substantially free of indentations. The field joint coating may be injection moulded to have an upstand that is less than or equal to about 5 mm.

IPC Classes  ?

• B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
• B29L 23/00 - Tubular articles
• B29K 23/00 - Use of polyalkenes as moulding material

Abstract

In an injection molded polypropylene field joint of an oil or gas pipeline, the three- dimensional geometry of the injection molded/cast coating can have an influence on the stress placed on the line coating during cooling. Specifically, it has been found that molding or casting a coating having circumferential grooves, or other groove geometry, proximal to the interface with the line coating, will reduce line coating failure proximal to the field joint, in particular line coating failure related to the initial spooling/reeling of the pipe.

IPC Classes  ?

• B29C 70/84 - Moulding material on preformed parts to be joined
• F16L 58/10 - Coatings characterised by the materials used by rubber or plastics
• B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
• F17D 5/00 - Protection or supervision of installations

Abstract

A pipeline having a series of interconnected pipe sections forming Field Joints, each pipe section having a coating with a thermal insulation layer which extends over a substantial portion of a length of the pipe section, and an anti-corrosion layer situated underneath the thermal insulation layer. The pipeline has a Field Joint Coating (FJC) at connection regions where ends of the adjacent pipe sections are interconnected. Each FJC has an anti-corrosion coating layer, an intermediate coating layer of a thermoplastic material which covers the anti-corrosion coating layer, and a FJC thermal insulation layer which covers the intermediate coating layer.

IPC Classes  ?

• F16L 59/20 - Arrangements specially adapted to local requirements at flanges, junctions, valves, or the like adapted for joints for non-disconnectable joints
• F16L 58/18 - Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings

Abstract

A method of coating a field joint, pipe sections for forming a coated field joint, and a coated field joint formed thereby. First and second angular cut backs are provided in the parent coating of each pipe section. The first angular cut back is at an angle of about 30°±5° relative to the longitudinal axis of the field joint, and the second angular cut back is positioned further from the field joint than the first angular cut back. The first and second angular cut backs result in the parent coating having a stepped profile, a step in the stepped profile between the first and second angular cut backs, the is substantially parallel to the longitudinal axis of the field joint and is free of indentations. The field joint coating is injection moulded to have an upstand that is less than or equal to about 5 mm.

IPC Classes  ?

• B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
• F16L 58/18 - Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
• F16L 13/02 - Welded joints
• F16L 58/10 - Coatings characterised by the materials used by rubber or plastics
• B29K 23/00 - Use of polyalkenes as moulding material
• B29L 23/00 - Tubular articles

Abstract

A method of coating a field joint and a coated field joint formed thereby. The field joint coating includes a first thermal insulation material injection molded over the uncoated field joint to form a first layer, and a second thermal insulation material injection molded over the first layer to form a second layer. The second material has a greater flexibility than the first material and a lower maximum operating temperature than the first material. In certain embodiments, the second material forms a significant part of the volume of the field joint coating.

IPC Classes  ?

• B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
• F16L 58/18 - Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
• F16L 59/20 - Arrangements specially adapted to local requirements at flanges, junctions, valves, or the like adapted for joints for non-disconnectable joints
• B29C 45/16 - Making multilayered or multicoloured articles
• B29C 65/00 - Joining of preformed partsApparatus therefor
• B29K 23/00 - Use of polyalkenes as moulding material
• B29K 63/00 - Use of epoxy resins as moulding material
• B29K 75/00 - Use of polyureas or polyurethanes as moulding material
• B29K 105/20 - Inserts
• B29L 23/00 - Tubular articles

Abstract

A method of providing a foamed insulation coating on at least a portion of a pipe, including extruding a melt stream over the pipe portion. The melt stream includes a matrix polymer and expandable fillers in an unexpanded state, the melt stream being maintained at a sufficiently high temperature to maintain the matrix polymer in extrudable form and at a sufficiently high pressure to maintain the expandable fillers in the unexpanded state. Once extruded, the expandable fillers are permitted to expand into an expanded state at a lower pressure.

IPC Classes  ?

• F16L 59/02 - Shape or form of insulating materials, with or without coverings integral with the insulating materials
• C08J 9/228 - Forming foamed products
• B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)
• B29C 47/02 - incorporating preformed parts or layers, e.g. extrusion moulding around inserts or for coating articles
• F16L 59/14 - Arrangements for the insulation of pipes or pipe systems
• C08J 9/32 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof from compositions containing microballoons, e.g. syntactic foams
• B29K 105/04 - Condition, form or state of moulded material cellular or porous
• B29L 23/00 - Tubular articles
• B29C 47/92 - Measuring, controlling or regulating

Abstract

An insulated high-temperature transport conduit for use in undersea environments. The conduit comprises a continuous steel pipe having at least a first layer of thermal insulation provided over its outer surface. The first layer of thermal insulation comprises a polymer composition having a thermal conductivity of less than about 0.40 W/mK and long-term heat resistance at continuous operating temperatures within the range from about 150° C. to above about 205° C. The first thermal insulation layer comprises a polymer composition comprising a polymer selected from the group consisting of one or more fluoropolymers, hydrogenated nitrile butadiene rubber (HNBR), and a blend of one or more fluoropolymers with HNBR. The conduit may further comprise second and third layers of insulation on top of the first layer, along with a corrosion protection coating underlying the first thermal insulation layer.

IPC Classes  ?

• F16L 59/14 - Arrangements for the insulation of pipes or pipe systems
• F16L 1/16 - Laying or reclaiming pipes on or under water on the bottom
• F16L 59/02 - Shape or form of insulating materials, with or without coverings integral with the insulating materials
• B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
• B23K 37/00 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
• F16L 58/10 - Coatings characterised by the materials used by rubber or plastics
• F16L 58/18 - Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
• F16L 59/20 - Arrangements specially adapted to local requirements at flanges, junctions, valves, or the like adapted for joints for non-disconnectable joints
• F16L 13/02 - Welded joints
• B29C 39/10 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
• B29C 33/00 - Moulds or coresDetails thereof or accessories therefor
• F16L 9/02 - Rigid pipes of metal
• F16L 9/22 - Pipes composed of a plurality of segments

Abstract

A method of manufacturing a Field Joint Coating (FJC) for a pipeline, the method comprising: providing a pipe section to be joined to a similar pipe section or free end of a pipeline, wherein each pipe section is provided with a coating comprising a thermal insulation layer over a length of the pipe section having a protruding section, wherein the end zones of each pipe section are free of thermal insulation, thereby allowing access to the ends of the pipe section and the pipeline to connect the pipe section with the free end of the pipeline, applying an anti-corrosion coating layer on a connection region of the joined ends of the pipe section and the pipeline, heating the protruding section and applying an intermediate coating layer of a thermoplastic material on the anti-corrosion coating layer and the protruding section, applying a thermal insulation layer on the intermediate coating layer.

IPC Classes  ?

• B05D 1/08 - Flame spraying
• F16L 59/20 - Arrangements specially adapted to local requirements at flanges, junctions, valves, or the like adapted for joints for non-disconnectable joints
• F16L 58/18 - Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings

Abstract

A method for forming a high temperature field joint between two insulated pipe sections, and an insulated conduit having a low temperature field joint. The conduit comprises a steel pipe with a corrosion protection coating and a pipe insulation layer comprising a polymer composition having thermal conductivity of less than about 0.40 W/mk, and/or heat resistance to continuous operating temperatures from about 150° C. to above about 205° C. After a circumferential weld joint is formed between the two pipes, a first field joint insulation layer is applied over the joint area, the first field joint insulation layer comprises a polymer composition having heat resistance to continuous operating temperatures from about 150° C. to above about 205° C.

IPC Classes  ?

• F16L 9/14 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
• F16L 59/02 - Shape or form of insulating materials, with or without coverings integral with the insulating materials
• B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
• B23K 37/00 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
• F16L 58/10 - Coatings characterised by the materials used by rubber or plastics
• F16L 59/14 - Arrangements for the insulation of pipes or pipe systems
• F16L 58/18 - Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
• F16L 59/20 - Arrangements specially adapted to local requirements at flanges, junctions, valves, or the like adapted for joints for non-disconnectable joints
• F16L 13/02 - Welded joints
• B29C 39/10 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
• B29C 33/00 - Moulds or coresDetails thereof or accessories therefor
• F16L 1/16 - Laying or reclaiming pipes on or under water on the bottom
• F16L 9/02 - Rigid pipes of metal
• F16L 9/22 - Pipes composed of a plurality of segments

Abstract

A wrappable, styrenic thermal insulation product for application to flexible, armored pipe is in the form of an elongate tape of generally rectangular cross-section, optionally being provided with interlocking and/or overlapping portions so as to provide a continuous insulating layer when one or more layers of the tape are wound around the pipe. The interlocking and/or overlapping portions may be of various configurations. The tape is comprised of polystyrene or a styrene-based thermoplastic having high compressive creep resistance, high compressive strength and low thermal conductivity and may be foamed or unfoamed. A flexible, armored pipe incorporates one or more layers of the wrappable, styrenic thermal insulation product between an outer armor layer and an outer polymeric sheath.

IPC Classes  ?

• F16L 11/08 - Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
• F16L 9/147 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement

Abstract

A polymeric composition for insulating fluid and/or gas transport conduits, such as off-shore oil and gas pipelines operating at temperatures of 130° C. or higher in water depths above 1,000 meters. The outer surface of the conduit is provided with at least one layer of solid or foam insulation comprising a high temperature resistant thermoplastic having low thermal conductivity, high thermal softening point, high compressive strength and high compressive creep resistance. The high temperature resistant thermoplastic is selected from one or more members of the group comprising: polycarbonate; polyphenylene oxide; polyphenylene oxide blended with polypropylene, polystyrene or polyamide; polycarbonate blended with polybutylene terephthalate, polyethylene terephthalate, acrylonitrile butadiene styrene, acrylonitrile styrene acrylate, or polyetherimide; polyamides, including polyamide 12 and 612 and elastomers thereof; polymethylpentene and blends thereof; cyclic olefin copolymers and blends thereof; and, partially crosslinked thermoplastic elastomers, also known as thermoplastic vulcanizates or dynamically vulcanized elastomers.

IPC Classes  ?

• F16L 9/14 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups

Abstract

Coatings for protecting and insulating fluid and/or gas transport conduits, such as off-shore oil and gas pipelines operating at temperatures of up to 100° C. in water depths above 1,000 meters. The outer surface of the conduit is provided with at least one layer of thermal insulation comprising polystyrene or styrene-based thermoplastic, having low thermal conductivity, high thermal softening point, high compressive strength and high compressive creep resistance.

IPC Classes  ?

• F16L 9/14 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups