Provided are a flexible insulated air duct and a modular flexible insulated air-duct system; the flexible insulated air duct includes an air-duct main body (1); the air-duct main body (1) includes an inner air-duct layer (5) and a heat-insulating layer (4) integrally formed on the inner air-duct layer (5); the inner air-duct layer (5) is arranged inside the heat-insulating layer (4), and the heat-insulating layer (4) is a rubber/plastic material. The modular flexible insulated air-duct system made by assembling a main air duct (7), a branched air duct (8), and a connecting air duct (9) may be rapidly connected on-site using a zip fastener to form an air-duct system having any configuration.

A system comprising a protective jacket for insulating pipe is provided. The protective jacket comprises a first metal shell comprising an interior surface and an exterior surface, wherein the interior surface comprises a moisture protective coating, and the exterior surface comprises a film adhered to the exterior surface by an adhesive, and wherein the adhesive provides for a toolless removal of the film.

A system comprising a protective jacket for insulating pipe is provided. The protective jacket comprises a first metal shell comprising an interior surface and an exterior surface, wherein the interior surface comprises a moisture protective coating, and the exterior surface comprises a film adhered to the exterior surface by an adhesive, and wherein the adhesive provides for a toolless removal of the film.

A coaxial heat transfer tube (100), comprising a first inner heat transfer tube (110) having straight parts (111, 113, 115, 117) and curved parts (112, 114, 116), a first outer heat transfer tube (120) having straight parts (121, 123, 125, 127) and curved parts (122, 124, 126). The first outer heat transfer tube (120) radially surrounds the first inner heat transfer tube (110) at least within the first primary straight part (121) and the first primary curved part (122). Thermally insulating material (530) has been provided in between a curved part (122) of the first outer heat transfer tube (120) and a curved part (112) of the first inner heat transfer tube (110). Neither a straight part (121) nor a curved part (122) of the first outer heat transfer tube (120) comprises a longitudinal seam. A method for making a coaxial heat transfer tube (100).

A coaxial heat transfer tube (100), comprising a first inner heat transfer tube (110) having straight parts (111, 113, 115, 117) and curved parts (112, 114, 116), a first outer heat transfer tube (120) having straight parts (121, 123, 125, 127) and curved parts (122, 124, 126). The first outer heat transfer tube (120) radially surrounds the first inner heat transfer tube (110) at least within the first primary straight part (121) and the first primary curved part (122). Thermally insulating material (530) has been provided in between a curved part (122) of the first outer heat transfer tube (120) and a curved part (112) of the first inner heat transfer tube (110). Neither a straight part (121) nor a curved part (122) of the first outer heat transfer tube (120) comprises a longitudinal seam. A method for making a coaxial heat transfer tube (100).

A foamed resin molded article (1) including: a foamed resin layer (30) comprising a first resin which is a copolymer including a rubber component, a vinyl cyanide monomer unit and an aromatic vinyl monomer unit, and a blowing agent; and a non-foamed resin layer (50) covering the foamed resin layer (30), wherein: the non-foamed resin layer (50) comprises a second resin which is a copolymer including a rubber component, a vinyl cyanide monomer unit, and an aromatic vinyl monomer unit; and the amount of the rubber component in the non-foamed resin layer (50), determined by pyrolysis-gas chromatography/mass spectrometry (PGC/MS), is 1% by mass or more and 30% by mass or less, based on the total mass of the second resin.

A foamed resin molded article (1) including: a foamed resin layer (30) comprising a first resin which is a copolymer including a rubber component, a vinyl cyanide monomer unit and an aromatic vinyl monomer unit, and a blowing agent; and a non-foamed resin layer (50) covering the foamed resin layer (30), wherein: the non-foamed resin layer (50) comprises a second resin which is a copolymer including a rubber component, a vinyl cyanide monomer unit, and an aromatic vinyl monomer unit; and the amount of the rubber component in the non-foamed resin layer (50), determined by pyrolysis-gas chromatography/mass spectrometry (PGC/MS), is 1% by mass or more and 30% by mass or less, based on the total mass of the second resin.

An apparatus for sealing an opening in a metal sheath surrounding an insulated pipe is provided, the apparatus including a base comprising an outer flange securable within the opening, and defining an inner passage therethrough, the base having an annular ridge extending into the inner passage; a flexible waterproof body positionable within the inner passage, the body having a periphery therearound and a groove located within the periphery adapted to engage around the annular ridge; and a flexible metal element within the base.

An apparatus for sealing an opening in a metal sheath surrounding an insulated pipe is provided, the apparatus including a base comprising an outer flange securable within the opening, and defining an inner passage therethrough, the base having an annular ridge extending into the inner passage; a flexible waterproof body positionable within the inner passage, the body having a periphery therearound and a groove located within the periphery adapted to engage around the annular ridge; and a flexible metal element within the base.

A method for suppressing corrosion under insulation includes a step of applying a paste containing aerogel particles and a liquid medium to a target surface to form a coating film. A paste for suppressing corrosion under insulation contains aerogel particles and a liquid medium.