A pipe having an inner layer and an outer layer. The inner layer includes a first material having a first hydrostatic design basis (HDB), and the outer layer is coextruded with the inner layer and includes a second material having a second HDB. The second HDB is greater than or equal to the first HDB, and the first HDB and the second HDB are as specified in ASTM Test Method D2387. Also provided re methods of making and using the pipe.

A pipe having an inner layer and an outer layer. The inner layer includes a first material having a first hydrostatic design basis (HDB), and the outer layer is coextruded with the inner layer and includes a second material having a second HDB. The second HDB is greater than or equal to the first HDB, and the first HDB and the second HDB are as specified in ASTM Test Method D2387. Also provided re methods of making and using the pipe.

A chafe layer for a fluid conduit, wherein the chafe layer consists of thermoplastic polyurethane which contains a polyol, in particular a short-chained, diol as a chain extender and isocyanate. The polyol is a polycarbonate. A fluid conduit, a method for producing a fluid conduit as well as the use of a polyurethane and the use of an ethylene copolymer as an additive.

A chafe layer for a fluid conduit, wherein the chafe layer consists of thermoplastic polyurethane which contains a polyol, in particular a short-chained, diol as a chain extender and isocyanate. The polyol is a polycarbonate. A fluid conduit, a method for producing a fluid conduit as well as the use of a polyurethane and the use of an ethylene copolymer as an additive.

The present invention provides a structure that improves sound absorption coefficient. The present invention provides a structure comprising: a foam resin layer formed of a foam material having a foaming ratio of 1.1 to 8 times; and a sound absorbing layer formed of a foam material having a foaming ratio of 10 to 30 times, the sound absorbing layer laminated on the foam resin layer.

The present invention provides a structure that improves sound absorption coefficient. The present invention provides a structure comprising: a foam resin layer formed of a foam material having a foaming ratio of 1.1 to 8 times; and a sound absorbing layer formed of a foam material having a foaming ratio of 10 to 30 times, the sound absorbing layer laminated on the foam resin layer.

The present invention is directed to a pipe or pipe fitting comprising a polyurea-based coating, wherein the pipe or pipe fitting is made from plastic, wherein the plastic is selected from polyolefins, preferably polyethylene (PE) and/or polypropylene (PP). The polyurea-based coating allows for enhanced mechanical strength and performance of the pipe or pipe fitting comprising the polyurea-based coating compared to a corresponding pipe or pipe fitting not comprising the polyurea-based coating, wherein the mechanical strength and performance relate to hydrostatic pressure resistance according to the Hydrostatic Pressure Test under ISO 1167 and/or resistance to failure according to the Notched Pipe Test under ISO 13479 and/or long-term hydrostatic strength according to ISO 9080:2012 standard. This makes the pipes suitable for high-pressure applications, for example in the Oil and Gas industry, in particular to use of plastic pipes of the present invention comprising a polyurea-based coating for conveying process fluids in both water and hydrocarbon environments.

The present invention is directed to a pipe or pipe fitting comprising a polyurea-based coating, wherein the pipe or pipe fitting is made from plastic, wherein the plastic is selected from polyolefins, preferably polyethylene (PE) and/or polypropylene (PP). The polyurea-based coating allows for enhanced mechanical strength and performance of the pipe or pipe fitting comprising the polyurea-based coating compared to a corresponding pipe or pipe fitting not comprising the polyurea-based coating, wherein the mechanical strength and performance relate to hydrostatic pressure resistance according to the Hydrostatic Pressure Test under ISO 1167 and/or resistance to failure according to the Notched Pipe Test under ISO 13479 and/or long-term hydrostatic strength according to ISO 9080:2012 standard. This makes the pipes suitable for high-pressure applications, for example in the Oil and Gas industry, in particular to use of plastic pipes of the present invention comprising a polyurea-based coating for conveying process fluids in both water and hydrocarbon environments.

Various fittings capable of preventing distortion are disclosed. The fitting comprises a metal member configured to have at least two sub metal members and a body. Here, the sub metal members are included in the body, and the body is formed of plastic.

Various fittings capable of preventing distortion are disclosed. The fitting comprises a metal member configured to have at least two sub metal members and a body. Here, the sub metal members are included in the body, and the body is formed of plastic.