Abstract: A fire tube with three hollow tube sections, two of which are parallel to each other and one of which is perpendicular to and connects the ends of the first two tube sections. The bottom-most tube section, which contains the burner, has an inner ceramic liner that is made up of one or more separate ceramic tubular sections. An upper set of cooling fins surrounds the top part of the bottom-most tube section, and a lower set of cooling fins surrounds the bottom part of the bottom-most tube section.

Abstract: A fire tube with three hollow tube sections, two of which are parallel to each other and one of which is perpendicular to and connects the ends of the first two tube sections. The bottom-most tube section, which contains the burner, has an inner ceramic liner that is made up of one or more separate ceramic tubular sections. An upper set of cooling funs surrounds the top part of the bottom-most tube section, and a lower set of cooling fins surrounds the bottom part of the bottom-most tube section.

Abstract: A method of rehabbing reinforced concrete pilings while in service and without the requirement to demo or otherwise gain access over the ends of an existing column. Design adopts modern environmentally responsible fiber reinforced polymer rebar and other FRP stirrups uniquely shaped into spiral sections requiring only side access for placement, designed to permanently encase the piling with a totally non-rusting non-metal reinforcement lateral containment cage featuring preformed circumference stirrups that mechanically interlock vertically and lateral adjustability to control density. The spiral stirrups extending fully 360-degrees around an existing piling with an additional overlap of at least 45 degrees.

Abstract: A box type duct with circumferential obtuse angle connection. Unit plates respectively located on the upper, lower and two side surfaces are spliced in the circumferential direction to form a unit pipe section, and the unit pipe sections are spliced in the axial direction to form a box type duct; wherein the unit plate is an arc-shaped corrugated plate arched to the outside of the box type duct, and the adjacent unit plates form an obtuse angle of circumferential connection. The cross section of the duct is in an approximately rectangular box shape, so the utilization ratio of clearance of the duct is high; the unit plate adopts an arc-shaped structure, and by utilizing the pipe-soil joint stressing principle, the strength and bearing capacity of the overall structure are maximized; and the box type duct adopts flat flange or angle steel flange connection in the circumferential direction.

Abstract: A pipe coupler may include a first coupling member and a second coupling member. The first coupling member may be configured to hold a portion of a first pipe. The second coupling member may be configured to hold a portion of a second pipe coupled to the first pipe. The first coupling member and the second coupling member may be coupled to each other to connect the first pipe to the second pipe in a direction substantially perpendicular to a coaxis of the coupled first and second pipes. Thus, a leakage of the fluid through a combining portion between the first and second coupling members may be suppressed.

Abstract: A method of manufacturing at least one flange (1a, 1b) by first rotating a tubular element (30) and two sheet elements (10, 20) with respect to one another until a radially enlarged portion (11) and adjacent hub section (21a,b) have been formed on the tubular element. The sheet element is impregnated by a thermosetting resin. When the resin has cured, the radially enlarged portion (11) is cut along a cut line (S), thereby also dividing the tubular element (30) in two parts (30a, 30b) and generating at least a first flange (1a) having a first flange section (11a) and a first hub section (21a). Optionally, a second flange (1b) having a second flange section (11b) and a second hub section (21b), is generated. In a preferred embodiment, the cut line (S) is arranged in the middle of the radially enlarged portion (11), whereby two similar flanges (1a, 1b) are generated.

Abstract: Described herein are coiled tubes with improved and varying properties along the length that are produced by using a continuous and dynamic heat treatment process (CDHT). Coiled tubes can be uncoiled from a spool, subjected to a CDHT process, and coiled onto a spool. A CDHT process can produce a “composite” tube such that properties of the tube along the length of the tube are selectively varied. For example, the properties of the tube can be selectively tailored along the length of the tube for particular application for which the tube will be used.

Abstract: A pipe unit for a rehabilitation pipe is used to rehabilitate an existing pipe. The pipe unit has segments mutually linked in a circumferential direction of the pipe unit, and at least one diameter expander for enlarging an inner diameter of the pipe unit. The diameter expander has a thickness in the circumferential direction of the pipe unit and is inserted between an adjacent pair of the mutually linked segments so as to be completely separated from each other by the diameter expander in the circumferential direction and by an amount corresponding to the thickness of the diameter expander.

Abstract: A tube weld seam test method and device for testing a tube weld seam (32) of a flexible tube (18) for leaks having: a first pinching device (10) and a second pinching device (12) for pinching closed the flexible tube (18) at a first position (A) and at a second position (B), the weld seam to be tested being arranged between the first and second positions (A; B); a compressing mechanism arranged for partly compressing a tube section enclosed between the first and second pinching devices (10; 12); and a pressure test device (14) arranged for testing an internal pressure of said tube section in order to test the tube weld seam for leaks.

Abstract: This is a bloodflow-directable infusion catheter which may be used in cardiovascular and endovascular procedures to deliver diagnostic, therapeutic, or vaso-occlusive agents to a target site accessible through the vasculature. The device is a flow-directed infusion catheter having a variety of sections of different flexibilities with tapered junctions between those sections. Additionally, at least some of the inventive catheter's sections have radio-opaque markers at or near the distal end of the individual sections. The more distal section or sections of the inventive catheter may be severed from the catheter body by the physician user so that the remaining catheter has a suitable diameter for the chosen task and the resulting severed end has a radio-opaque marker showing the catheter's distalmost end.

Abstract: A dual bias weld is an improved weld for joining strips to be formed into coiled tubing. Tubing is formed from a first strip and a second strip, the first and second strips being of the same width. A planar end surface is formed on an end of the first strip, the plane of the planar end surface being defined by a line lying along a top surface of the first strip at an acute angle with respect to the longitudinal direction of the first strip and a line lying along an edge surface of the first strip at an acute angle with respect to the longitudinal of the first strip. Similarly, a planar end surface is formed on an end of the second strip, the plane of the planar end surface being defined by a line lying along a top surface of the second strip at an acute angle with respect to the longitudinal direction of the second strip and a line lying along an edge surface of the second strip at an acute angle with respect to the longitudinal direction of the second strip.

Abstract: A system for making a long length of seam-welded tubing from shorter lengths of flat metal strip which are spliced end-to-end and formed into tubular form and seam-welded. Adjoining ends of two successive lengths of the strip are trimmed at supplementary angles, one of which is an acute angle. The trimmed ends are abutted and welded, preferably with weldment extending beyond each such end. All surfaces of the weld are finished to match the dimensions of the strip. The tubing, along with the welded joints, is heat treated as the tubing is formed to produce a product substantially free of internal surface roughness along the splice welds.

Abstract: A secondary containment system for conduits, pipes and electric cables includes a plurality of separate duct sections connected in end-to-end relation to provide an electrically insulating fluid tight system. Each duct section includes a pair of generally Z-shaped structural members formed from a fiber reinforced plastic material with each structural member including top and bottom flanges for supporting a removable top cover panel and a rigidly joined bottom panel. The structural member top flanges are preferably shaped to deflect the top cover panel to present an outwardly convex top surface to prevent the collection of condensate and other fluids.

Abstract: A retaining ring of an eyeball return fitting of the type used in swimming pools and spas is provided with a releaseable or breakaway cover cap. The cap closes the end of the return fitting during construction. This permits the finish work for the cement and plaster stages of the pool construction to be effected without the danger of cement or plaster getting into the fitting during construction. After construction has been completed, the cap is released and drops away, carrying with it any cement or plaster which may have hardened on it during construction.

Abstract: A buried conduit consisting, in transverse cross-section, of a lower component (2) and a covering upper component (1) which bears on the upper part of the side walls (22) of the lower component (2) by means of lengthwise bearing members (3). According to the invention, the upper component (1) forms an arched vault made so as to have sufficient flexibility to distort slightly under the effect of the forces to which it is subjected, and the lower component (2) is made so as to resist, without distortion, the forces transmitted by the ground and by the upper component (1), both components being fixed to each other along the lengthwise bearing members (3) and the latter consisting of socket joints, so as to permit the bearing parts of the distortable upper component to pivot without sliding relative to the undistortable lower component.

Abstract: Multiple electrical connections between circuits in axially displaced housings are made by mounting the connectors so that they are at right angles to the axis of the housings.

Abstract: A prefabricated composable duct element for piping aeriform fluids in general and for use in erecting concrete casting boxes is provided. The duct element may be connected to further duct elements to constitute conventional ducts such as straights of various lengths, bend or elbows, multi-way unions, cap elements for closing heads and the like. All such elements are provided at each end thereof with joint connection means each including at least one male part and at least one female part for the coupling thereof with any adjoining one of said elements.