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.

Disclosed is a sealed air flow system suitable for use with a sample shaker assembly. The sealed air flow system includes at least one component which accommodates movement of the sample shaker assembly while maintaining an air tight assembly between components of the sealed air flow system.

The invention relates to a method (100) for manufacturing a fastening arrangement for fastening a collar to a tube. The method comprises the steps of providing a hollow tube (10), arranging said tube for receiving at least one forming punch (30) in the axial direction of the tube, punching the tube with a forming punch at an inner radial part of an edge portion (16) of the tube in the axial direction of the tube, locally reducing the tube thickness, so that the material being punched is plastically relocated in the axial direction, locally forming a snap portion (11) in the form of a flange (12) in the radial direction towards the hollow inside of the tube, providing a collar (20) configured to be arranged on the tube, wherein the collar comprises at least one receiving portion (21) arranged to receive said snap portion, and arranging the collar to the tube such that the snap portion engages with said receiving portion.

A hot and cold composite formed square and rectangular steel tube and a production method for the same are provided. The radius of an outer corner of the square and rectangular steel tube meets the following conditions: when t is less than or equal to 6 mm, R is greater than 0 and less than 2.0 t; when t is greater than 6 mm and less than or equal to 10 mm, R is greater than 0 and less than 2.5 t; when t is greater than 10 mm, R is greater than 0 and less than 3.0 t, wherein t is the wall thickness of a straight tube part of the square and rectangular steel tube; R is the radius of each of the outer corners of the four corners of the square and rectangular steel tube; and the wall thickness of each corner of the square and rectangular steel tube is between 1.0 t and 1.8 t.

This application relates to a duct system, including a duct section that includes a foam body having a first end face and a second end face, where the foam body defines a duct passage extending from the first end face to the second end face, and a sleeve that directly or indirectly covers the foam body, the first sleeve including a plurality of side walls, where at least one side wall has an integral end portion that is folded back to define at least a portion of an integral, peripheral coupling flange around an end face of the foam body.

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.

The invention relates to an elongate profile extending in a longitudinal direction and having a first end and a second end, wherein between the first end and the second end the profile has at least one cutting line forming a cutting pattern for at least one profile section to be removed from the profile, wherein after removal of the at least one profile section from the profile the first end of the profile is bendable towards the second end of the profile and/or vice versa.

A forming device which expands a metal pipe material to form a metal pipe having a pipe portion and a flange portion includes first and second dies paired with each other and including pipe forming surfaces for forming the pipe portion and flange forming surfaces for forming the flange portion, a drive unit that drives at least one of the first and second dies, and a controller that controls the drive unit, in which, on at least one of the flange forming surfaces of the first and second dies, a protrusion portion protruding by an amount not to abut against the other flange forming surface when the dies are closed is formed and the controller controls the drive unit to form a thin wall portion at which a thickness of the flange portion becomes partially small at the flange portion by the protrusion portion pressing the flange portion.

The invention relates to an elongate profile extending in a longitudinal direction and having a first end and a second end, wherein between the first end and the second end the profile has at least one cutting line forming a cutting pattern for at least one profile section to be removed from the profile, wherein after removal of the at least one profile section from the profile the first end of the profile is bendable towards the second end of the profile and/or vice versa.

A fluid transfer tube is provided that includes a tubular body. This tubular body includes a first tube end, a second tube end and a bore that extends axially along a centerline through the tubular body from the first tube end to the second tube end. The bore includes a tool receptacle portion at the first tube end. The tool receptacle portion is at least partially formed by an interior surface of the tubular body. The interior surface has a polygonal cross-sectional geometry when viewed in a plane perpendicular to the centerline.