Abstract: There is provided an insulation foam in a tubular form, comprising at least one seamless layer of crosslinked polyethylene (PEX) closed-cell physical foam. The tubular foam can favourably be used to thermally insulate tubes that convey water, refrigerants or other fluids, in particular, copper tubes for Heating, Ventilation, Air-Conditioning and Refrigeration (HVAC&R) applications, as well as plastic tubes for use in domestic plumbing systems, hydronic radiant heating and cooling systems. There is also provided a method for manufacturing a crosslinked polyethylene (PEX) closed-cell physical foam in seamless tubular form, an insulation foam material using the same and a polymer blend for its manufacturing.

Abstract: There is provided an insulation foam in a tubular form, comprising at least one seamless layer of crosslinked polyethylene (PEX) closed-cell physical foam. The tubular foam can favourably be used to thermally insulate tubes that convey water, refrigerants or other fluids, in particular, copper tubes for Heating, Ventilation, Air-Conditioning and Refrigeration (HVAC&R) applications, as well as plastic tubes for use in domestic plumbing systems, hydronic radiant heating and cooling systems. There is also provided a method for manufacturing a crosslinked polyethylene (PEX) closed-cell physical foam in seamless tubular form, an insulation foam material using the same and a polymer blend for its manufacturing.

Abstract: A seamless composite metal tube comprises an inner layer (1) consisting of copper or a copper alloy, an outer layer (5) consisting of aluminium or an aluminium alloy, and at least three different intermediate intermetallic layers (2, 3, 4) each consisting of copper and aluminium, wherein the concentration of copper decreases from the inner layer (1) to the outer layer (5) in the radial direction of the tube.

Abstract: The present invention relates to a method of manufacturing a seamless multilayer composite pipe, an apparatus for manufacturing a seamless multilayer composite pipe, and a seamless multilayer composite pipe. The method of manufacturing a seamless multilayer composite pipe comprises the steps of a) providing a seamless metal pipe with at least one continuous layer covering its inner surface, and b) passing the seamless metal pipe through a unit in order to reduce the diameter of the seamless metal pipe by cold working. An apparatus for manufacturing a seamless multilayer composite pipe comprises a unit for providing a seamless metal pipe with at least one continuous layer covering its inner surface, and a unit for reducing the diameter of the seamless metal pipe by cold working.

Abstract: A seamless composite metal tube comprises an inner layer (1) consisting of copper or a copper alloy, an outer layer (5) consisting of aluminium or an aluminium alloy, and at least three different intermediate intermetallic layers (2, 3, 4) each consisting of copper and aluminium, wherein the concentration of copper decreases from the inner layer (1) to the outer layer (5) in the radial direction of the tube.

Abstract: An Insert (4) for a pipe-fitting system comprising a fitting (2) and a pipe (3) is provided. The insert (4) is adapted to be inserted into the fitting (2) and is adapted to receive the pipe (3) an outer diameter of which substantially corresponds to the inner diameter of the inner circumferential face of the insert (4). The inner circumferential face is provided with a sealing portion (4a, 4a1, 4a2) adapted to seal between the insert (4) and the pipe (3) and a holding portion (4d) for holding the pipe (3), being different from the sealing portion (4a, 4a1, 4a2). An outer circumferential face of the insert (4) is provided with at least one circumferential groove (5) for engaging with a deformed portion of the fitting (2).

Abstract: The present invention relates to a method of manufacturing a seamless multilayer composite pipe, an apparatus for manufacturing a seamless multilayer composite pipe, and a seamless multilayer composite pipe. The method of manufacturing a seamless multilayer composite pipe comprises the steps of a) providing a seamless metal pipe with at least one continuous layer covering its inner surface, and b) passing the seamless metal pipe through a unit in order to reduce the diameter of the seamless metal pipe by cold working. An apparatus for manufacturing a seamless multilayer composite pipe comprises a unit for providing a seamless metal pipe with at least one continuous layer covering its inner surface, and a unit for reducing the diameter of the seamless metal pipe by cold working.

Abstract: An insert (4) is provided for connecting standardized fittings (2) normally used for connecting standardized pipes with multilayer pipes (3). The insert (4) being slightly elastically deformable is adapted to be inserted into a fitting (2) and adapted to receive a pipe (3), wherein an outer circumferential face of the insert is substantially smooth for sealing between the fitting (2) and the insert (4) and an inner circumferential face of the insert (4) is provided with a sealing portion (4a, 4a1, 4a2) for sealing between the insert (4) and the pipe (3) and a holding portion (4d) for holding the pipe (3) in position.