A monolithic metal thermal insulating sleeve liner for fluid flow devices such as valves and piping used in severe industrial applications is additively manufactured (e.g., by 3D printing) to fit the bore of a protected fluid flow device. Tessellated support structures obliquely extending between inside surfaces of inner and outer shells provide increased resistance to thermal conduction while also providing increased strength against compression forces. Example support structures include an array of four obliquely oriented elongated members mutually intersecting mid-way between the inside surfaces of inner and outer cylindrical shells. If internal interstices are sealed they can be vacuumed or pressurized to enhance thermal insulating properties. A pressure equalizing aperture can be provided on or through the sleeve if needed in some applications.

Thermally insulating pipes are provided for use in the transportation of a heated substance, such as steam or a fluid. The thermally insulating pipes allow the substance traveling through the pipes to retain their heat during transport. The thermally insulating pipes may include one or more layers each of pipe and insulating material, which are overlapping and alternating in the thermally insulating pipe. An outer pipe layer is also provided on the thermally insulating pipe, which may have an increased thickness for threading, splicing or swedging the thermally insulating pipe.

Thermally insulating pipes are provided for use in the transportation of a heated substance, such as steam or a fluid. The thermally insulating pipes allow the substance traveling through the pipes to retain their heat during transport. The thermally insulating pipes may include one or more layers each of pipe and insulating material, which are overlapping and alternating in the thermally insulating pipe. An outer pipe layer is also provided on the thermally insulating pipe, which may have an increased thickness for threading, splicing or swedging the thermally insulating pipe.

A pipe-in-pipe assembly comprises a bundled infill structure occupying an annulus between inner and outer pipes (12, 26) of the assembly. The infill structure is formed of a plurality of elongate elements laid along the inner pipe comprising a mixture of reinforcing elements (16B) and insulating elements (16A). The reinforcing elements have greater mechanical resistance than the insulating elements to radial compression whereas the insulating elements provide greater thermal insulation than the reinforcing elements. Pluralities of the reinforcing elements are positioned together within the infill structure to form reinforcing formations, such as spacer formations, embedded between insulating regions of the infill structure that are defined by pluralities of the insulating elements.

A pipe-in-pipe assembly comprises a bundled infill structure occupying an annulus between inner and outer pipes (12, 26) of the assembly. The infill structure is formed of a plurality of elongate elements laid along the inner pipe comprising a mixture of reinforcing elements (16B) and insulating elements (16A). The reinforcing elements have greater mechanical resistance than the insulating elements to radial compression whereas the insulating elements provide greater thermal insulation than the reinforcing elements. Pluralities of the reinforcing elements are positioned together within the infill structure to form reinforcing formations, such as spacer formations, embedded between insulating regions of the infill structure that are defined by pluralities of the insulating elements.

The present disclosure relates generally to duct liner insulation products for curvilinear ducts, and more specifically relates to methods and materials to universally fit duct liner insulation for lining oval ducts in air conditioning, heating, and ventilating (HVAC) systems. A duct liner insulation for a curvilinear duct is provided that includes an insulation layer configured to line an interior surface of a curvilinear duct when installed within the curvilinear duct. The duct liner insulation also includes an elastically deformable layer configured to compress the insulation layer against the interior surface of the curvilinear duct when installed within the curvilinear duct such that the insulation layer extends substantially uniformly around an inner periphery of the curvilinear duct.

A heat shield bladder includes first and second sheets of insulating material that form a bladder between the first and second sheets. At least one reflective foil is disposed within the bladder and a plurality of spacers are disposed within the bladder and positioned to space the at least one reflective foil from the first and second sheets of insulating material. Multiple reflective foils may be disposed within the bladder with spacers between each reflective foil. The heat shield bladder may be rolled into a tube shaped and used inside a pipe or formed into panels that may be used to line a vessel.

The invention relates to a segment of pipe-in-pipe pipeline comprising an annulus under reduced pressure sealed and delimited by a metallic internal pipe inserted into a metallic external pipe and provided with a measurement system to determine in a non-intrusive manner the state of the annulus, the measurement system being composed of a first internal emitter/receiver assembly placed inside the annulus and cooperating with means to measure a first physical quantity such as pressure, hygrometry or temperature inside the reduced pressure annulus and a second external emitter/receiver assembly arranged to the exterior of the segment and facing said first assembly.

A heat shield bladder includes first and second sheets of insulating material that form a bladder between the first and second sheets. At least one reflective foil is disposed within the bladder and a plurality of spacers are disposed within the bladder and positioned to space the at least one reflective foil from the first and second sheets of insulating material. Multiple reflective foils may be disposed within the bladder with spacers between each reflective foil. The heat shield bladder may be rolled into a tube shaped and used inside a pipe or formed into panels that may be used to line a vessel.

A pressure vessel system for a motor vehicle for storing fuel includes a plurality of pressure vessels that are combined to form a pressure vessel assembly. The pressure vessels, when mounted, are arranged substantially in parallel relative to one another, and the pressure vessels are fluidically interconnected via a common fuel line. The technology further relates to a fuel line comprising thermal insulation.