A modular fire-rated conduit or duct assembly suitable for applications such as ventilation systems in a multi-floor or multi-room building. According to an embodiment, the modular fire-rated conduit assembly comprises two or more duct or conduit sections, each of the duct sections includes an inner duct liner and an outer casing, and a plurality of casing spacers configured to form a thermal insulating cavity between at least a portion of space between the inner duct liner and the outer casing, and the thermal insulating cavity is configured to receive a thermal material, a first exterior flange connector is attached to one end of each of the inner duct liners, a second exterior flange connector attached to another end of each of the inner duct liners, the first and the second exterior flange connectors are configured to form an assembly junction for coupling respective ends of the duct or conduit sections to form a connected run of the conduit or duct sections, and a joint connection end is formed between the exterior flange connector and the outer casing, and the joint connection end is configured to receive a joint insulating material, and further includes a return configured to receive a connection edge of a joint cover, and the joint cover is configured to encapsulate the joint connection ends of adjacent duct sections modules.

Each of a pair of couplers includes: a vacuum double-pipe structure main part; a valve seat forming an opening through which a fluid flows; and a valve body in the main part. The valve body is configured such that, when separating the couplers, in each coupler, the body is brought into contact with the seat by a spring to close the opening, and when coupling the couplers, the body of each coupler is pressed by the body of the other coupler to move away from the seat and open the opening. The valve body includes: a holding member holding a sealing material sealing between the body and the seat when the body is in contact with the seat; a resin block covering a distal end surface of the holding member; and a metal operating member accommodating the block and protruding from the holding member to pass through the opening.

A modular fire-rated conduit or duct assembly suitable for applications such as ventilation systems in a multi-floor or multi-room building. According to an embodiment, the modular fire-rated conduit assembly comprises two or more duct or conduit sections, each of the duct sections includes an inner duct liner and an outer casing, and a plurality of casing spacers configured to form a thermal insulating cavity between at least a portion of space between the inner duct liner and the outer casing, and the thermal insulating cavity is configured to receive a thermal material, a first exterior flange connector is attached to one end of each of the inner duct liners, a second exterior flange connector attached to another end of each of the inner duct liners, the first and the second exterior flange connectors are configured to form an assembly junction for coupling respective ends of the duct or conduit sections to form a connected run of the conduit or duct sections, and a joint connection end is formed between the exterior flange connector and the outer casing, and the joint connection end is configured to receive a joint insulating material, and further includes a return configured to receive a connection edge of a joint cover, and the joint cover is configured to encapsulate the joint connection ends of adjacent duct sections modules.

A plug-in coupling for connecting a first to a second double-walled, vacuum-insulated cryogenic line is proposed. The plug-in coupling comprises a coupling plug and a coupling socket. The coupling plug has an inner and an outer pipe piece and a first connecting flange and is connected to the first cryogenic line. The coupling socket has an inner and an outer pipe piece and a second connecting flange and is connected to the second cryogenic line. In an assembled state of the plug-in coupling, the coupling plug has been plugged into an open annular gap in the coupling socket. The annular gap is surrounded both at its inner circumference and at its outer circumference by an insulating vacuum, whereby the thermal insulation of the plug-in coupling is improved. This construction makes possible a shorter design of the plug-in coupling, which, while achieving good thermal insulation, is space-saving and easy to handle.

To provide an emergency detachment mechanism for a fluid handling device that has exceptional heat insulation performance and enables liquid hydrogen or another very-low-temperature fluid to be handled. An emergency detachment mechanism for a fluid handling device provided with a pair of couplers 1, wherein each of the pair of couplers 1 has a coupler body part 5 including an internal tube part 2 in which a fluid passes through an interior and which opens at a distal end side, an external tube part 3 which forms a vacuum layer 9 with the internal tube part 2 and which opens at a distal end side, and a connecting flange part 4 that closes off a space between the internal tube part 2 and the external tube part 3, a wall thickness of the connecting flange part 4 being less than a wall thickness of the external tube part 3.

A plug-in coupling for connecting a first to a second double-walled, vacuum-insulated cryogenic line is proposed. The plug-in coupling comprises a coupling plug and a coupling socket. The coupling plug has an inner and an outer pipe piece and a first attachment flange and is connected to the first cryogenic line. The coupling socket has an inner and an outer pipe piece and a second attachment flange and is connected to the second cryogenic line. On a distal end of the coupling plug, there is arranged a circular annular seal such that a sealed connection between the coupling socket and the coupling plug is formed when the coupling plug has been fully inserted into the coupling socket. The plug-in coupling is characterized in that (a) the seal on the distal end of the coupling plug is of electrically insulating form, (b) an insulating sleeve is arranged on the outer pipe piece of the coupling plug, and (c) an insulating disc is situated between the first and the second attachment flange when the coupling plug has been inserted into the coupling socket. The plug-in coupling realizes a galvanic is separation between the coupling plug and the coupling socket.

A thermo-structural spacer is provided. The spacer includes a cylindrical center portion, a first flange connected to a first end of the cylindrical center portion, a second flange connected to a second end of the cylindrical center portion. The second end is distal from the first end. The spacer further includes an annular inner wall configured for providing a through hole extending through a longitudinal axis of the thermo-structural spacer. The cylindrical center portion is narrower than the first flange. The cylindrical center portion is narrower than the second flange. The thermo-structural spacer is configured for restricting heat transfer between the first flange and the second flange.

A modular, aerogel-based vacuum insulated pipe section comprising an outer conduit; an inner conduit concentrically disposed within the outer conduit with aerogel insulation and a condensable gas being disposed in the insulation space between the concentric conduits. As a stand-alone pipe section, the insulation space is at a pressure within the range of from about 100 microns Hg to about 1000 microns Hg. However, in operation, when a cryogenic fluid is traversing the inner conduit, the condensable gas condenses and the pressure within the insulation space is further reduced to range of from about 1 microns Hg to about 5 microns Hg. The vacuum insulated pipe section further includes a coupling arrangement disposed on a first end of the inner conduit and a second end of the inner conduit, the coupling arrangement configured to engage or mate with a corresponding end of another modular vacuum insulated pipe section.

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.

The present relates a reinforcing method in which a duct reinforcement member of straight slat type is applied to a duct having a rectangular cross section whose transverse sides and longitudinal sides have changeable lengths, four bars each including a bottom open equilateral trapezoidal cross-sectional portion integrally formed with a pair of flat sheet portions extended in opposite directions under a pair of hypotenuses of the equilateral trapezoidal cross-sectional portion are bonded to four outer walls of the duct, and a curved angle coupler in contact with ends of the two bars adjacent to each other at the four corners of the duct is bonded to a pair of flat sheet portions near the ends of the two bars.