Abstract: A multi-stage gas compression, storage and distribution system utilizing a hydrocarbon gas from a municipal gaseous supply line in a manner that does not affect an operational integrity of said municipal gaseous supply line includes an inlet line fluidly in fluid communication with a supply of hydrocarbon gas at a first pressure, a first compression unit configured to compress the hydrocarbon gas from the inlet line to a second pressure, a first storage vessel configured to receive the hydrocarbon gas from the first compression unit for storage at the second pressure, a second compression unit configured to compress the hydrocarbon gas from the first storage vessel to a third pressure, and a second storage vessel configured to receive the hydrocarbon gas from the second compression unit for storage at the third pressure.

Abstract: A laser welded joint has weld metal provided between a plurality of steel sheets. A chemical composition of the weld metal has predetermined components, and average hardness of the weld metal is 350 to 540 in Vickers hardness. In the weld metal, distribution density of porosities having a diameter of 2 ?m to 50 ?m is equal to or less than 5.0 pieces/mm2. In the weld metal, distribution density of oxide inclusions having a diameter of 3 ?m or more is 0.1 to 8.0 pieces/mm2.

Abstract: A manufacturing method of a multilayer shell-core composite structural component comprises the following procedures: (1) respectively preparing feeding material for injection forming of a core layer, a buffer layer and a shell layer, wherein the powders of feeding material of the core layer and the shell layer are selected from one or more of metallic powder, ceramic powder or toughened ceramic powder, and are different from each other, and the powder of feeding material of the buffer layer is gradient composite material powder; (2) layer by layer producing the blank of multilayer shell-core composite structural component by powder injection molding; (3) degreasing the blank; and (4) sintering the blank to obtain the multilayer shell-core composite structural component. The multilayer shell-core composite structural component has the advantages of high surface hardness, abrasion resistance, uniform thickness of the shell layer, stable and persistent performance.

Abstract: A method of forming an additively manufactured aluminum part includes establishing an arc between a metal-cored aluminum wire and the additively manufactured aluminum part, wherein the metal-cored aluminum wire includes a metallic sheath and a granular core disposed within the metallic sheath. The method includes melting a portion of the metal-cored aluminum wire using the heat of the arc to form molten droplets. The method includes transferring the molten droplets to the additively manufactured aluminum part under an inert gas flow, and solidifying the molten droplets under the inert gas flow to form deposits of the additively manufactured aluminum part.

Abstract: An aspect of the present disclosure is to precisely define a constant value used in the Monkman-Grant analysis, when estimating remaining life of a high-chromium steel pipe through which high-temperature and high-pressure fluid is allowed to flow. A remaining life estimation method according to the present disclosure is particularly characterized in that a step of obtaining a constant on an accelerated creep test is performed in which a constant indicative of the product of a strain rate and a rupture time in the Monkman-Grant analysis is obtained by multiplying a first coefficient to transform uniaxial rupture ductility into multiaxial rupture ductility, the uniaxial rupture ductility being obtained from a specimen of the high-chromium steel pipe, a second coefficient to amend consumed life of the specimen, and a third coefficient to amend a measured pressure into an assessment pressure.

Abstract: A steel plate has a chemical composition containing, by mass %, C: 0.03% or more and 0.10% or less, Si: 0.05% or more and 0.50% or less, Mn: 1.00% or more and 2.00% or less, P: 0.015% or less, S: 0.005% or less, Mo: 0.20% or less (including 0%), Nb: 0.01% or more and 0.05% or less, and the balance being Fe and inevitable impurities, and, if desired, containing, by mass %, one or more of Al: 0.005% or more and 0.1% or less, Cu: 1.00% or less, Ni: 1.00% or less, Cr: 0.50% or less, and V: 0.05% or less, in which Pcm* (%) (=C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/2+V/10) is 0.20 or less. The steel plate has a volume fraction of bainite in a base material of 50% or more, and has a volume fraction of island martensite (MA) in a coarse-grain region reheated in a dual-phase temperature range of 5.0% or less.

Abstract: A corrosion resistant strip is disclosed. The strip comprises a core, and an interlayer adapted to be located between the core and an optional Al—Si based clad. The interlayer has a composition essentially consisting of (in percentages by weight): Si?0.9%, Fe?0.7%, Cu?0.5%, Mn 0.5-1.8%, Mg?0.7%, Zn?4.0%, Ni?1.5%, elements selected from group IVb, Vb, and/or VIb of the periodic table ?0.3% each and ?0.5% in total ?0.05 wt % each and ?0.15% in total, of unavoidable impurity elements, balance Al. The core is more noble than the interlayer after brazing. The interlayer exhibits a volume fraction of a texture component of at least 30%.

Abstract: A terminal plate 160F is configured such that an electrically conductive aluminum core plate 181 having a current collector terminal 161 is placed between a titanium cell-side plate 182 and a titanium end plate-side plate 183 both having higher corrosion resistance. Both the cell-side plate 182 and the end plate-side plate 183 have plate outer peripheries extended more outward than the outer periphery of the core plate 181. A plate adhesive seal member 184 is arranged to cover the outer peripheries of the respective plates including the core plate 181 and keep the plate-sandwiched state. The core plate 181 has a gold-plated outer peripheral end face and is thereby in the non-bonded state with the plate adhesive seal member 184 on the outer peripheral end face.

Abstract: A composition for welding or brazing aluminum comprises silicon (Si) and magnesium (Mg) along with aluminum in an alloy suitable for use in welding and brazing. The Si content may vary between approximately 4.7 and 10.9 wt %, and the Mg content may vary between approximately 0.15 wt % and 0.50 wt %. The alloy is well suited for operations in which little or no dilution from the base metal affects the Si and/or Mg content of the filler metal. The Si content promotes fluidity and avoids stress concentrations and cracking. The Mg content provides enhanced strength. Resulting joints may have a strength at least equal to that of the base metal with little or no dilution (e.g., draw of Mg). The joints may be both heat treated and artificially aged or naturally aged.

Abstract: The present invention provides high strength steel pipe for line pipe superior in low temperature toughness suppressed in drop of toughness of the HAZ and a method of production of the same, more particularly high strength steel plate for line pipe used as a material for high strength steel pipe for line pipe and a method of production of the same, in particular high strength steel pipe for line pipe superior in low temperature toughness characterized in that the chemical compositions of the base metal is, by mass %, C: 0.020 to 0.080%, Si: 0.01 to 0.50%, Mo: 0.01 to 0.15%, Al: 0.0005 to 0.030%, and Nb: 0.0001 to 0.030% contained in a range of C+0.25Si+0.1Mo+Al+Nb: 0.100% or less and the mixture of austenite and martensite present along prior austenite grain boundaries of the reheated part of the heat affected zone has a width of 10 ?m or less and a length of 50 ?m or less.

Abstract: A ceramic tile includes an opening that is used to help fasten the ceramic tile to a mounting object. The opening can have a relatively small width that can obviate the need for a cap and can allow for less abrading of a polymer compound that is exposed adjacent to a major surface of the ceramic tile. In an embodiment, an insert is placed into the opening in the ceramic tile, and the ceramic tile is fastened to a wall using a welding technique. In other embodiments, different shapes of openings and fastening techniques can be used.

Abstract: A method for producing a semifinished part (20) for an implant, in particular for an intraluminal endoprosthesis, which comprises the following steps: a) providing a first sleeve (11) from a first metallic material and at least one second sleeve (12, 13) from a second metallic material, b) arranging the first sleeve (11) and the at least one second sleeve (12, 13) into one another in such a manner that the sleeve combination (10) forms at least a press fit between said sleeves, and c) forming the sleeve combination (10) at an increased temperature by means of extrusion. The invention further includes a method for producing an implant, to a corresponding semifinished part or a corresponding implant, respectively.

Abstract: There is provided a surface-coating material having excellent cracking resistance and peeling resistance, and having excellent high-temperature corrosion resistance properties; and a poppet valve coated with the surface-coating material. The Ni—Cr—Co-based alloy comprises 40.0 to 50.0 mass % of Cr, 10.0 to 20.0 mass % of Co, 0.5 to 5.0 mass % of Nb, 0.01 to 5.0 mass % of Fe and 0.1 to 3.0 mass % of Si, with the remainder being 26.0 to 40.0 mass % of Ni and unavoidable impurities. The Ni—Cr—Co-based alloy may additionally comprise one or more elements selected from Mo, W, Mn, Ti, Al, B and C in a total amount of 5.0 mass % or less. The content of each of Ti and Al is 3.0 mass % or less and the content of each of B and C is 1.0 mass % or less. In the poppet valve, at least a face portion is coated with the Ni—Cr—Co-based alloy.

Abstract: A method and apparatus for joining materials having primarily ferritic properties is described. The method includes joining the ferritic materials using a welding process and a weld material having a primarily austenitic microstructure. The resulting weldment enhances the properties of yield ratio, uniform elongation, toughness and tearing resistance thereby producing superior strain capacity. High strain capacity produces a structure that accommodates high axial loading. The weldment can also accommodate larger than conventional weld flaws while maintaining sufficient strength, tearing resistance, and fracture toughness under high axial loading.

Abstract: The present invention relates to a pre-stressed insulated tubing, including an inner tube (3) and an outer tube (2) nested outside of the inner tube (3), and a closed ring cavity is formed between the inner tube (3) and the outer tube (2), wherein an insulated casing (4) is arranged in the closed ring cavity. The pre-stressed insulated tubing of the present invention features high vacuum degree, high thermal insulation level and long working life, and the insulated casing is reusable for cost saving.

Abstract: A process for producing a fluid conduit by forming a fluid delivery channel along the outer surface of a first elongate tubular body member. A second elongate tubular body having an inner circumference is fitted about the outer circumference of the first tubular body so as to seal the at least one fluid delivery channel on the outer surface of the first tubular body. A section of the fitted first and second tubular assembly is removed therefrom so as to define a fluid delivery channel in the form of a sealed fluid conduit.

Abstract: Provided is a bimetallic tube for transport of hydrocarbon feedstocks in a petrochemical process unit and/or refinery process unit, including: i) an outer tube layer being formed from a steam cracker alloy including at least 18.0 wt. % Cr and at least 10.0 wt. % Ni; ii) an inner tube layer being formed from an alumina forming bulk alloy including 5.0 to 10.0 wt. % of Al, 18.0 wt. % to 25.0 wt. % Cr, less than 0.5 wt. % Si, and at least 35.0 wt. % Fe with the balance being Ni, wherein the inner tube layer is formed plasma powder welding the alumina forming bulk alloy on the inner surface of the outer tube layer; and iii) an oxide layer formed on the surface of the inner tube layer, wherein the oxide layer is substantially comprised of alumina, chromia, silica, mullite, spinels, or mixtures thereof.

Abstract: Coiled tubing is provided with one or more conduits passing through and secured to an inner wall of the coiled tubing. The conduits are resistant to annealing temperatures and therefore are welded to flat plate which is used for forming the coiled tubing or are retained in a groove formed in the inner wall of the coiled tubing. When the coiled tubing is formed by rolling the flat plate into a slit tubular and seam welding the longitudinal joint, the coiled tubing and the heat resistant conduits are annealed. The conduit can be wireline, electric line, cable or an empty tubular, all of which are resistant to the annealing temperatures. The empty tubular can be used to retain a secondary conduit such as heat labile fiber optic cable which is run into the empty tubular, such as by pumping or floating, after the annealing process.

Abstract: The present invention relates to a pipe section (10), constructed to be joined end-to-end to a same pipe section in order to form a pipeline which is laid from a pipeline laying vessel, the pipe section having a pipe has a greater wall thickness than the wall thickness of a main part of the pipe wall (15), the pipe section comprising a thickened gripping zone (20) which section, wherein the thickened gripping zone has a length (22) and a wall thickness which are constructed and arranged to allow a shear clamp (45) having protrusions (48) to grip the thickened gripping zone in order to suspend the pipeline from the pipeline laying vessel via the thickened gripping zone.

Abstract: Provided is a bimetallic tube for transport of hydrocarbon feedstocks in refinery process furnaces, and more particularly in furnace radiant coils, including: i) an outer tube layer being formed from stainless steels including chromium in the range of 15.0 to 26.0 wt. % based on the total weight of the stainless steel; ii) an inner tube layer being formed from an alumina forming bulk alloy including 5.0 to 10.0 wt. % of Al, 20.0 wt. % to 25.0 wt. % Cr, less than 0.4 wt. % Si, and at least 35.0 wt. % Fe with the balance being Ni, wherein the inner tube layer is formed plasma powder welding the alumina forming bulk alloy on the inner surface of the outer tube layer; and iii) an oxide layer formed on the surface of the inner tube layer, wherein the oxide layer is substantially comprised of alumina, chromia, silica, mullite, spinels, or mixtures thereof.

Abstract: Provided is a bimetallic tube for transport of hydrocarbon feedstocks in refinery process furnaces, and more particularly in furnace radiant coils, including: i) an outer tube layer being formed from carbon steels or low chromium steels comprising less than 15.0 wt. % Cr based on the total weight of the steel; ii) an inner tube layer being formed from an alumina forming bulk alloy including 5.0 to 10.0 wt. % of Al, 20.0 wt. % to 25.0 wt. % Cr, less than 0.4 wt. % Si, and at least 35.0 wt. % Fe with the balance being Ni, wherein the inner tube layer is formed plasma powder welding the alumina forming bulk alloy on the inner surface of the outer tube layer; and iii) an oxide layer formed on the surface of the inner tube layer, wherein the oxide layer is substantially comprised of alumina, chromia, silica, mullite, spinels, or mixtures thereof.

Abstract: The invention relates to a tube (01) or semi-finished tube, in particular for chemical apparatus construction, for storing or for transporting aggressive storage media, comprising a solid inner tube (02) with the inner side (05) of which the storage medium can come into contact and which is made of a thermoplastic that is chemically resistant to the storage medium, and comprising an adhesion-promoting layer (03) applied to the outer side (09) of the inner tube (02), which has a textile structure and is made of a thermoplastic, the textile structure of the adhesion-promoting layer (03) being suitable for mounting a support tube (04) on the outer side of the adhesion-promoting layer (03), the outer side of the inner tube (02) and the inner side of the adhesion-promoting layer (03) being welded together in a material-bonded manner, the textile structure being preserved on the outer side of the adhesion-promoting layer (03).

Abstract: A pipeline for the transport of a pressurized flowable medium, consisting of a metal tube corrugated transversely to its longitudinal direction and of a hose which is arranged in the same and consists of plastic. In the position of use the hose bears against the inwardly pointing wave troughs of the metal tube, which hose has a multiplicity of holes separated from one another in the wall of the same over its entire axial length. The wave troughs of the metal tube penetrate slightly into the surface of the hose so as to fix the latter with respect to axial loads.

Abstract: An apparatus for conveying fluid comprising a first tube and a second tube. The first tube has a first end and a second end, an inner wall and an outer wall. The inner wall defines a passage for fluid and an outer wall has at least one first receiving section for receiving an inner wail from the second tube. The second tube has a first end and a second end, an inner wall and an outer wall. The inner wall defines a chamber for receiving the first tube and has at least one second receiving section for receiving the outer wall of the first tube wherein at least one of the first tube and the second tube are drawn down such that the first receiving section and the second receiving section of the first tube and the second tube are in close proximity to each other and sealed.

Abstract: An exhaust manifold includes: a double collecting pipe having an inner pipe, including a collecting pipe portion and branch pipe portions, and an outer pipe, covering the collecting and branch pipe portions and thicker than the inner pipe; and an inner pipe retainer having semi-circular portions and a connecting portion, and thicker than the inner pipe and thinner than the outer pipe. The inner pipe retainer connects the inner and outer pipes with a gap therebetween. Exhaust gas from exhaust ports of a set of cylinders is introduced into the collecting pipe portion through the branch pipe portions. The total spot-welded area of the outer peripheral portions of the branch pipe portions and the inner peripheral portions of the semi-circular portions is larger than that of the inner peripheral portion of the outer pipe and the outer peripheral portions of the semi-circular portions.

Abstract: A process for producing a fluid conduit by forming a fluid delivery channel along the outer surface of a first elongate tubular body member. A second elongate tubular body having an inner circumference is fitted about the outer circumference of the first tubular body so as to seal the at least one fluid delivery channel on the outer surface of the first tubular body. A section of the fitted first and second tubular assembly is removed therefrom so as to define a fluid delivery channel in the form of a sealed fluid conduit.

Abstract: Provided is a bimetallic tube for transport of hydrocarbon feedstocks in refinery process furnaces, and more particularly in furnace radiant coils, including: i) an outer tube layer being formed from carbon steels or low chromium steels comprising less than 15.0 wt. % Cr based on the total weight of the steel; ii) an inner tube layer being formed from an alumina forming bulk alloy including 5.0 to 10.0 wt. % of Al, 20.0 wt. % to 25.0 wt. % Cr, less than 0.4 wt. % Si, and at least 35.0 wt. % Fe with the balance being Ni, wherein the inner tube layer is formed plasma powder welding the alumina forming bulk alloy on the inner surface of the outer tube layer; and iii) an oxide layer formed on the surface of the inner tube layer, wherein the oxide layer is substantially comprised of alumina, chromia, silica, mullite, spinels, or mixtures thereof.

Abstract: The present invention provides high strength steel plate with excellent low temperature toughness, high strength steel pipe using this as a base metal, and methods of production of the same. The steel plate of the present invention contains Mo: 0.05 to 1.00% and B: 0.0003 to 0.0100%, has a Ceq of 0.30 to 0.53, has a Pcm of 0.10 to 0.20, and has a metal structure which has an area percentage of polygonal ferrite of 20 to 90% and has a balance of a hard phase comprised of one or both of bainite and martensite. To obtain this steel plate, strain-introducing rolling is performed with a start temperature of not more than Ar3+60° C., an end temperature of Ar3 or more, and a reduction ratio of 1.5 or more, then the plate is air-cooled and then acceleratedly cooled from Ar3?100° C. to Ar3?10° C. in temperature by 10° C./s or more.

Abstract: An APIX100-grade high strength steel pipe includes a base material containing, in mass percentage, C: more than 0.03% and 0.08% or less, Si: 0.01% to 0.5%, Mn: 1.5% to 3.0%, P: 0.015% or less, S: 0.005% or less, Al: 0.01% to 0.08%, Nb: 0.005% to 0.025%, Ti: 0.005% to 0.025%, N: 0.001% to 0.010%, O: 0.005% or less, and B: 0.0003% to 0.0020%, further contains one or more of Cu, Ni, Cr, Mo, and V, satisfies 0.19?Pcm?0.25, the balance being Fe and unavoidable impurities, and has a TS of 760 to 930 MPa, a uniform elongation of 5% or more, and a YR of 85% or less; the seam weld metal has a specific composition.

Abstract: The present invention provides high strength thick welded steel pipe for line pipe superior in low temperature toughness, and a method of production of the same. A base material steel plate containing C: 0.010 to 0.050%, Si: 0.01 to 0.50%, Mn: 0.50 to 2.00%, Al: 0.020% or less, Ti: 0.003 to 0.030%, and Mo: 0.10 to 1.50%, having a carbon equivalent Ceq of 0.30 to 0.53, having a crack susceptability parameter Pcm of 0.10 to 0.20, satisfying formula 3, comprised an area ratio of 20% or less of polygonal ferrite and an area ratio of 80% or more of bainite, and having an effective crystal grain size of 20 ?m or less is formed into a pipe shape, then seam welded to make the effective crystal grain size of the heat affected zone 150 ?m or less: 10C+100Al+5Mo+5Ni<3.3??formula 3.

Abstract: The manufacture of clad tubes (30) is described. Tube (10) intended to line the walls of a combustion chamber is made of a high strength material to contain the high-pressure steam created. However, these tubes (10) are typically not corrosion/erosion resistant. Manufacture of tubes (10) with both high strength and high resistance to corrosion/erosion would be prohibitively expensive. Therefore, tubes (10) are covered with a non-corrosive material to protect them. This is done by surface welding a strip (20) of high alloy material to the outer surface (12) of the tubes (10). It is preferable to use electric high frequency resistance welding to surface weld the strip (20) onto tube (10). The strips (20) are preferably attached with little melting and metal dilution allowing the strip 20 to keep its corrosion/erosion resistance properties.

Abstract: The present invention provides high strength welded steel pipe for line pipe inexpensive in cost and superior in low temperature toughness, and a method of production of the same, produced by forming a base material steel plate containing, by mass %, C: 0.010 to 0.050%, Si: 0.01 to 0.50%, Mn: 0.50 to 2.00%, S: 0.0001 to 0.0050%, and Ti: 0.003 to 0.030%, limiting Al to 0.020% or less and Mo to less than 0.10%, having a carbon equivalent Ceq of 0.30 to 0.53 and a crack susceptibility parameter Pcm of 0.10 to 0.20, comprised of polygonal ferrite and residual bainite of an area rate of 20% or less, and having an effective crystal grain size of 20 ?m or less, into a pipe shape, then seam welding it and making the effective crystal grain size of the heat affected zone 150 ?m or less.

Abstract: A tubular assembly comprising a first iron based tubular having a first non-cladded inner surface; and a second iron based tubular having a second non-cladded inner surface, wherein the first tubular is connected to the second tubular using a non-iron based bonding material. Preferably, the non-iron based bonding material has a lower crack growth rate than the iron based tubulars.

Abstract: In a method of making a high-pressure accumulator pipe as composite pipe of steel for pressures of up to 1800 bar and above with high static strength and fatigue strength for fuel injection systems with common rail systems for internal combustion engines, a first inner pipe part is inserted into a second outer pipe part with little clearance, and the inner pipe part is connected to the outer pipe part gap-free and by interference fit through mechanical forming. The mechanical forming includes a rolling-in process, wherein the inner pipe part is subjected to a ductile expansion and the outer pipe part is subjected to an elastic expansion using an oversized rolling tool that is moved within the inner pipe part, and wherein a residual compressive stress adjusted to the operating pressure is applied to the inner pipe part after the forming process via the elastic resilience of the outer pipe part.

Abstract: A tube for an exhaust system includes, an add-on part that is firmly connected with the tube by a brazing seam.

Abstract: A twin-wall pipe comprises an internal pipe and an external pipe. The external pipe is corrugated, having elevations and troughs. The twin-wall pipe is further provided with a socket. In a transition portion towards the twin-wall pipe and the socket, provision is made for at least one overflow passage which interconnects the clearance between the external pipe and internal pipe in the vicinity of the transition portion and an adjacent elevation. a?b refers to the radial height b of the overflow passage relative to its width a in the circumferential direction.

Abstract: There is described a flow pipe (10) of metal for use in a flow meter for fluids, particularly multiphase fluids. The flow pipe has a main run (7) and one or more laterally extending channels (t) of small diameter relative to the main run. The internal surface of the main run that defines the flow area, is cladded with a corrosion and wear resistant metallic material (6) different from the metallic material of the remainder of the flow pipe. The material that encloses and defines the laterally extending channels (t) is of the same metallic material as the internal surface of the flow pipe. Consequently a continuous and integrated internal cladding is formed in the main run so that a fluid in the flow pipe (10) is in contact with the corrosion and wear resistant material only.

Abstract: A method for setting a protective coating on the inner wall of a tube includes providing a cylindrical sleeve, then setting on the outer surface of the sleeve a layer of a thermo fusible material, then machining the sleeve to provide it with an external diameter corresponding to the tube internal diameter, positioning the sleeve in the tube, and finally soldering the sleeve on the tube by applying heat.

Abstract: A method for assembling a corrugated double-walled pipe section from pipe segments, having the steps of: providing an inner wall segment which is curved in circumferential direction and straight in longitudinal direction, providing an outer wall segment which is curved in circumferential direction and corrugated in longitudinal direction, connecting the inner wall segment to the concave side of said corrugated outer wall segment, providing a longitudinal profile at the longitudinally extending edges of the wall segment so as to provide a pipe segment, and connecting the adjoining longitudinal profiles of at least two of the pipe segments to each other.

Abstract: An apparatus for conveying fluid comprising a first tube and a second tube. The first tube has a first end and a second end, an inner wall and an outer wall. The inner wall defines a passage for fluid and an outer wall has at least one first receiving section for receiving an inner wail from the second tube. The second tube has a first end and a second end, an inner wall and an outer wall. The inner wall defines a chamber for receiving the first tube and has at least one second receiving section for receiving the outer wall of the first tube wherein at least one of the first tube and the second tube are drawn down such that the first receiving section and the second receiving section of the first tube and the second tube are in close proximity to each other and sealed.

Abstract: Abrasion resistant polymer pipe and a process for the production thereof. The pipe comprises a first, abrasion resistant inner layer (1) and a second, structural layer (2), which is placed on the outer side of the inner layer. The first and the second layers comprise extrudable polymer materials and they are preferably separated by an alarm layer which indicates wear or depletion of the inner layer. The pipe is suitable for use in the mining industry and generally for conducting liquid and gaseous fluids containing abrasive particles.

Abstract: A Cu/Al composite pipe and a manufacturing method thereof are disclosed. The inner layer of the pipe is Cu, and the outer layer is Al. The combinative layer is formed between the two layers due to mutual diffusion of Cu and Al. The raw composite pipe is rolled with single rolling by a planetary rolling machine, wherein the rolling process has the single pass percentage reduction of area of 50%˜95%, an exit rolling speed of 5˜30 m/min, a temperature in the deformation area of 200° C. ˜600° C. The pipe can be used in many fields, such as architecture, refrigeration, air-conditioners, refrigerators, solar energy, water heaters, condensers and radiators, etc.

Abstract: A method of manufacturing a brazed pipe comprises steps A to D. In the step A, on an upper surface of the right-hand side edge portion of a material plate 20 having a brazing material layer over opposite surfaces thereof, a first slant surface 21 is formed such that it inclines from the upper side toward the lower side while approaching the right end, and a first flat surface 22 is formed between the first slant surface 21 and the lower surface. In the step B, on a lower surface of the left-hand side edge portion of the material plate 20, a second slant surface 24 is formed such that it inclines from the lower side toward the upper side while approaching the left end, and a second flat surface 25 is formed between the second slant surface 24 and the lower surface.

Abstract: A pipe structure suitable for being laid in the sea comprises an inner pipe (2) for conveying fluid to be transported along the pipe structure and an outer pipe (3) around the inner pipe and supporting the inner pipe with space between the inner and outer pipes, the outer pipe having openings to allow water first to flow into the space between the inner pipe and the outer pipe and then to flow out of the space.

Abstract: A high-strength stainless steel, having good mechanical properties and corrosion resistance in a high-pressure hydrogen gas environment, and excellent in stress corrosion cracking resistance, and a container or other device for high-pressure hydrogen gas, which is made of the said stainless steel, are provided. The stainless steel is characterized in that it consists of, by mass %, C: not more than 0.02%, Si: not more than 1.0%, Mn: 3 to 30%, Cr: more than 22% but not more than 30%, Ni: 17 to 30%, V: 0.001 to 1.0%, N: 0.10 to 0.50% and Al: not more than 0.10%, and the balance Fe and impurities. Among the impurities, P is not more than 0.030%, S is not more than 0.005%, and Ti, Zr and Hf are not more than 0.01% respectively, and the contents of Cr, Mn and N satisfy the following relationship [1]: 5Cr+3.4 Mn?500 N??[1].

Abstract: A heat shield comprises a flexible inner jacket configured and disposed to be fitted around at least a portion of a component, and a flexible outer jacket configured and disposed to be fitted around the inner jacket.

Abstract: Process for producing single layer and multilayer polyolefin foam pipes with improved compression resistance having a polyolefin foam layer which consists of mixtures of modified propylene polymers having strain hardening behaviour or propylene homopolymers with a stereospecificity index >98% or propylene copolymers with a stereospecificity index of the homopolymer matrix of >96%. The polyolefin foam pipes include coated steel pipes for transporting crude oil or gas products or district heating applications, single layer pipes for insulation purposes and for non- or low-pressure applications and multilayer plastic pipes for the transportation of hot or cold fluids.

Abstract: The present invention provides a high strength welded steel pipe superior in weld zone embrittlement crack characteristics and a method of production of the same, that is, a method of production of a welded steel pipe superior in hydrogen embrittlement cracking resistance of weld metal characterized by seam welding from the inner and outer surfaces by a tensile strength of 850 MPa or more, then expanding or reducing the size of the pipe for correction, which method of production of welded steel pipe characterized in that the hydrogen concentration of the preceding weld metal is 0.2 cc or less per 100 g at ordinary temperature.

Abstract: A tubular body comprises an inner hollow core and an outer casing of one or more strips of self mechanically inter-engaging helically wound material having a higher yield strength than that of the core material. Also provided is a method of forming the tubular body comprising the steps of winding the outer core onto the inner core and an end connector for use with said tubular body when said body is provided with helically extending detents on an outer surface thereof.

Abstract: A weld joint having a base material and a weld metal both of an austenitic steel, wherein the weld metal has a chemical composition, in mass %, that C: 0.04% or less, Si: 1.0% or less, Mn: 3% or less, P: 0.02% or less, S: 0.005% or less, Cr: 15 to 25%, Ni: 30% or more, Mo: 10% or less, Nb: 2.5 to 5%, Al: 3.0% or less, Ti: 0.5% or less, and the balance: Fe and inevitable impurities, the contents of Al and Ti satisfying the following: (Ti+Al)>Nb/8. The weld joint is a high strength austenitic steel weld joint which exhibits excellent toughness at a low temperature and excellent resistance to hydrogen embrittlement, which are required for a piping and a vessel for high pressure hydrogen, particularly also in a welded zone.