Abstract: In a diaphragm bellows, diaphragms that follow one another are welded together alternately in region of their inner and outer edges. At least one guide part is provided for guiding on a surface of a rod passing through an inner through-opening in the diaphragm bellows or of a tube surrounding the diaphragm bellows. The at least one guide part is made of sheet metal and has a holding portion which, in the case of guiding on a rod, is located, in a region of an outer edge, between adjacent diaphragms and is welded to the adjacent diaphragms and, in the case of guiding on a tube, is located, in the region of an inner edge, between adjacent diaphragms and is welded to the adjacent diaphragms. The holding portion is connected to a guide portion for guiding on the surface of the rod or of the tube.

Abstract: A gripping apparatus for use in gripping a pipe, for holding forces, or restraining relative movement. The pipe defines an inside radius. The gripping apparatus has an outer surface where the outer surface defines a transition surface or a curve. In certain embodiments the transition surface or curve has a radius less than or equal to the inside radius of the pipe.

Abstract: A multilayered motor vehicle pipeline, wherein the pipeline has at least two layers, preferably at least three layers of plastic. At least one surface of at least one layer connected to another layer is configured profiled, wherein the profiling has maxima and minima. The height difference ?h between the maxima and the minima directly adjacent to the maxima is between 1 and 100 ?m.

Abstract: The present invention provides an insulated fluid conduit useful in facilities in which a hot fluid susceptible to one or more deleterious phase changes in response to heat loss to a cold environment is transported. Such conduits may be particularly well suited to improve thermal control in subsea hydrocarbon production operations. The fluid conduit includes an inner first insulating layer containing a first polymer matrix, and a first phase change material undergoing a phase change at T1. The fluid conduit includes an outer second insulating layer containing a second polymer matrix, and a second phase change material undergoing a phase change at T2, wherein T1 is greater than T2. One or more barrier layers inhibit migration of the phase change material from the insulation layers and into the environment. In one or more embodiments, the phase change material is present as a microencapsulated phase change material.

Abstract: A pipe (10) for conveying a fluid, including an inner sheath (20), at least one layer (34, 36) of inner armors, arranged outside the inner sheath (20) and an outer protection sheath (22), positioned outside each layer (34, 36) of inner armors. It includes an inner fluid, received between the inner sheath (20) and the outer sheath (22). The pipe includes an intermediate polymer sheath (24), interposed between the inner sheath (20) and the outer sheath (22), the intermediate sheath (24) and the inner sheath (20) delimiting an inner annular space (26) between them for receiving the inner fluid. The inner fluid is confined in the inner annular space (26) at a pressure above 50 bars.

Abstract: An exhaust duct includes a duct plate (21) having a cylindrical shape, a heat insulation panel (23) disposed at a predetermined interval on an inner surface side of the duct plate (21), a heat insulation material (22) disposed between the duct plate (21) and the heat insulation panel (23), and a connecting member (24) configured to connect the duct plate (21) to the heat insulation panel (23) and also including a first plate portion (31) and a second plate portion (32) as a stress absorption unit capable of absorbing stress in two directions intersecting in a longitudinal direction. With this structure, durability is improved by preventing damage of the connecting member between the duct plate and the heat insulation panel.

Abstract: A reelable mechanically lined pipe (MLP) (30) having at least a liner (32) and an outer pipe (34), the outer pipe having an outer diameter, DH, with the MLP formed from a plurality of pipe joints having conjoining girth welds (36), wherein the ends of each pipe joint terminate with clad overlay welds (40) having a length in the range Lmin=100 mm and Lmax=4DH, and wherein the liner thickness, t, is equal to or less than a value calculated by formula I as defined.

Abstract: The systems and methods described herein relate to an improved stretchable hose apparatus which enables the transmission of high-throughput signals along several conductors within a conductor cable. In particular, the stretchable hose enables consistent high speed communications and high power transmission between a buoyant object and an optional underwater device in all weather conditions by permitting compression of the conductor cable in a first range of hose extensions and limiting elastic elongation of the conductor cable in a second greater range up to full hose extension.

Abstract: A buckling pattern steel pipe for being buried in ground in which flexure occurs includes: a steel pipe straight portion; and a buckling pattern portion. The buckling pattern portion is in a shape expressed by a sine wave determined based on: a buckling wavelength which is 2.05 to 4.32 times a compression local buckling half wavelength expressed by 1.72?(r·T); and a crest height expressed by a value 8.00 to 16.25 times a pipe thickness of the steel pipe straight pipe portion, and the buckling pattern portion absorbs bending compression deformation caused by faulting of the ground and axial compression deformation caused by the flexure so as to avoid deformation of the steel pipe straight pipe portion, where r is a pipe thickness center radius of the steel pipe straight pipe portion and T is the pipe thickness of the steel pipe straight pipe portion.

Abstract: A corrugated steel pipe is disclosed. The corrugated steel pipe comprises a plurality of unit steel pipes, which are continuous in the axial direction. Each unit steel pipe comprises a first cylindrical pipe obtained by bending a first unit steel plate into a cylindrical shape, both ends of the first unit steel plate abutting each other and forming a first seam on one side of the first cylindrical pipe; and a second cylindrical pipe obtained by bending a second unit steel plate into a cylindrical shape, both ends of the second unit steel plate abutting each other and forming a second seam on one side of the second cylindrical pipe. The second cylindrical pipe is bent into a cylindrical shape and folded on the outer surface of the first cylindrical pipe so that the inner surface of the second unit steel pipe surrounds the first seam. The second seam is positioned not to correspond to the first seam.

Abstract: A septic line cleaning assistance device that positions into alignment with a lower opening in a T-pipe to plug the lower opening in the T-pipe. The blocked lower opening enables a suction apparatus to suck waste from a pipe connected to a waste opening in the T-pipe through an upper opening in the T-pipe. A rod is configured to be inserted along the T-pipe and positioned into place along the T-pipe. The rod comprises a plug end holding the plug that is configured to frictionally engage the lower opening in the T-pipe to effectively seal the lower opening. A handle end having a grip enables the positioning of the plug over the lower opening, and pulling the plug into a mating position with the lower opening. An adjustable peripheral fastener is slidably positioned over the upper end of the T pipe to hold the device and plug in place.

Abstract: A circumferential welded joint of a line pipe is formed by butting against each other end portions of steel pipes having a yield strength according to 5L Specification of API Standards not smaller than 555 N/mm2 and welding the butted portions in a circumferential direction. A joint strength ratio ?match=(TS-w/TS-b)·(YS-w/YS-b) represented by a product of a ratio between a tensile strength TS-w of a weld metal and a tensile strength TS-b of a base material and a ratio between a yield strength YS-w of the weld metal and a yield strength YS-b of the base material, and a critical equivalent plastic strain ?p-cri [%] for ductile crack generation in a base material heat affected zone satisfy Equation (1), and the yield strengths YS-w, YS-b of the weld metal and base material satisfy Equation (2). ?match>4.85?p-cri?0.31??(1) YS-w/YS-b?1.

Abstract: A gripping apparatus for use in gripping a pipe, for holding forces, or restraining relative movement. The pipe defines an inside radius. The gripping apparatus has an outer surface where the outer surface defines a transition surface or a curve. In certain embodiments the transition surface or curve has a radius less than or equal to the inside radius of the pipe.

Abstract: A system and method of sealing leaks in process piping and equipment without process shutdown by providing a clamp having a cavity surrounding a leaking structure, sealant equipment comprising an injection gun to inject a sealant into the clamp cavity, means for pressuring moldable sealant from the gun into the clamp cavity in a staged manner beginning at a point away from the leak site. The preferred sealant comprises a moldable nitrile rubber delayed curing (vulcanizing) formulation or composition molded into shapes for insertion into an injection gun.

Abstract: A fuel supply system provided comprises: a resin filler neck configured to have an opening which a fuel nozzle is inserted through and have a multi-layered structure of a conductive layer of electrical conductivity and a non-conductive layer of non-electrical conductivity; a resin fuel pipe connected with the filler neck and configured to have a multi-layered structure including a conductive outer layer of electrical conductivity provided as an outermost layer; and a cap member of electrical conductivity configured to open or close the opening of the filler neck. The filler neck includes a cap member contact part of electrical conductivity arranged to come into contact with the cap member and a conductive outer layer contact part of electrical conductivity arranged to come into contact with the conductive outer layer of the fuel pipe, so as to form a conductive path from the cap member to the conductive outer layer of the fuel pipe.

Abstract: Provided are articles useful for rapidly and easily stopping leaks of material contained in conduits, such as water pipes under pressure. Articles according to this disclosure include a band, a lock and a lever. The band is wrapped around the conduit or pipe, and the lever is configured to engage with an end of the band and the lock that rides on the band. Manually, pulling the remaining end of the band and then actuating the lever, or vice versa, cinches the band around the outer circumference of the conduit, effectively sealing the conduit wall and preventing the contents of the conduit from leaking into the ambient surroundings. Elements of the invention cooperate to permit easy removal of the articles for re-use.

Abstract: A pulsation damper is disposed within a fluid volume defined by a fluid volume wall such that the pulsation damper is exposed to pressure pulsations within the fluid volume. The pulsation damper includes a pulsation damper first half having a first damper wall which is flexible in response to the pressure pulsations; a pulsation damper second half having a second damper wall which is flexible in response to the pressure pulsations; and a damping volume defined between the pulsation damper first half and the pulsation damper second half such that the damping volume is fluidly segregated from the fluid volume. One of the pulsation damper first half and the pulsation damper second half defines a spacing member which maintains separation between the fluid volume wall and one of the first damper wall and the second damper wall.

Abstract: A system for generating swirl includes a pipe and at least two orifice plates located within a section of the pipe and defining a swirl generation area. Each orifice plate has an off-set orifice or hole and is configured to have a position that is adjustable within the swirl generation area. Each orifice plate may be oriented at an angle variable to each other to generate a variable degree of swirl as fluid flow exits the swirl generation area.

Abstract: A flow-straightener apparatus and associated systems for converting a rotating airflow into a substantially longitudinally directed airflow is presented. A first annular frame is provided and a second annular frame arranged concentrically within the first annular frame. A plurality of flow-straightener vanes are also provided, each having a first end coupled to an interior surface of the first annular frame and a second end coupled to an exterior surface of the second annular frame. The plurality of flow-straightener vanes each also have a leading edge and a trailing edge and each vane has a curved segment.

Abstract: A monomer delivery device for a bone cement delivery system having a sealed body that has and a chamber sized to receive an ampule of monomer, a collar attached to the body having a blade configured to sever the ampule and a spout attached to the collar to expel the monomer.