37results about "Rigid pipes" patented technology

A gas sampling line having a channel for conducting respiratory gases from a patient respiratory interface to a gas monitor, the gas sampling line comprising, i.a., a gas sampling tube comprised of a polyether block amide material, the polyether segments of which comprise polyethyleneoxide. Use of a tube comprised of a polyether block amide material, the polyether segments of which comprise polyethyleneoxide, for sampling of respiratory gases; and a method for sampling of respiratory gases, the method comprising conducting respiratory gases through such a tube. A gas analysis system for analysing respiratory gases, comprising a gas sampling line as defined above and a gas monitor connectable to the gas sampling line.

Syntactic foams and thermal insulation as described containing epoxy resin, hollow microspheres, and dried sol-gel or fumed metal oxide for forming a thermal insulating layer on a substrate such as a pipeline. Methods for forming such thermal insulating layers are also described, which can include formulating with blowing agents for forming closed cells in the finished insulating foam.

A mineral methane gas drainage pipe comprises a pipe body, wherein two ends of the pipe body are welded with flanges or fast joints, and the pipe body is formed by welding a carbon structural steel cold rolled steel strip, a stainless steel strip and a stainless steel composite steel strip in spiral winding mode. For every two adjacent steel strips, one steel strip is subjected to flanging, the steel strip and the other steel strip are subjected to flanging overlapping, and simultaneously a unique reinforced vault rib structure is formed through spiral winding welding. Whether to coat materials not generating gases hurting human bodies and having a good flame retardant effect on an inner layer and an outer layer of a main body is determined according to difference in materials, and the pipe body is led to be corrosion resistant, antistatic and long in service life. The pipe body is light in weight due to the fact that the pipe body is formed by welding the steel strips in spiral winding mode, and the self-designed fast joints lead the pipe body to have good sealing performance and high pressure loading capacity.

The invention relates to an anticorrosive pipe and relative producing method. It is purposed to solve the problems of present technique with high cost, and worse anticorrosive effect. The invention is characterized in that the producing method comprises following steps: (1) making the pipe line needed anti-corrosion reach Sa2.5 level via shot-blast de-rusting or sandblast de-rusting and removing surface dust; (2) plating adhesive agent on the pipe line to be dried naturally; (3) coiling anticorrosive belt and draw belt on the pipe line; (4) processing steam sulfuration in 130-140Deg.C for 15-25 minutes to prepare said anticorrosive pipe. The invention has lower producing cost, better anticorrosive effect and simple process.

The invention relates to an interlayer thermal-insulated plastic composite tube. Wherein, the producing method comprises: compressing the plastic to form two sheathes and synchronously compress at least one positioning support between them, form a tube with hollow interlayer. The inner wall of the inner tube is compounded with the tube in other material; the outer wall of outer tube can be compounded with the tube with other material; the space between the inner and outer tubes can be compounded with other thermal-insulated material; the surface of outer layer is compounded with reflective film, which is compounded with thermal-insulated tube, whose outer surface is plated with a reflective film with a surface layer which can be plated with reflective film. The invention has simple structure and easy operation, with better thermal-insulated efficiency.

The invention discloses a steel pipe with bell and spigot joints. The steel pipe comprises a basal steel pipe, wherein the basal steel pipe is a cylindrical pipe having a spiral welded junction and formed by spirally rolling, welding and fixedly connecting steel plates. The steel pipe is characterized by further comprising a spigot joint steel pipe and a horn-shaped bell joint; at least two annular grooves for placing sealing rings are formed in the outer surface of the spigot joint steel pipe; the two ends of the spigot joint steel pipe are respectively an inserting end and a welding end; a conical surface in sealing contact with the bell joint is arranged at the outer side of the inserting end of the spigot joint steel pipe; one end of the basal steel pipe is welded and fixedly connected with the welding end of the spigot joint steel pipe; and the other end is welded and fixedly connected with the small end of the horn-shaped bell joint. Connecting structures are as follows: the spigot joint steel pipe of the previous steel pipe is in sealing contact with the conical part of the horn-shaped bell joint of the next steel pipe through the conical surface of the spigot joint; and the spigot joint steel pipe of the previous steel pipe is in sealing contact with the horn-shaped bell joint of the next steel pipe through the sealing ring thereon. The steel pipe has such advantages as simple structure, high sealing reliability, quick mounting, convenience for maintenance and disassembly and long service life.

Provided are an apparatus for manufacturing a compound powder, a method of manufacturing an iron-boron compound powder by using the apparatus, a boron alloy powder mixture, a method of manufacturing the boron alloy powder mixture, a combined powder structure, a method of manufacturing the combined powder structure, a steel pipe, and a method of manufacturing the steel pipe The method of manufacturing the boron alloy powder mixture includes: preparing a mixed powder including a boron iron alloy powder and a target powder; heat-treating the mixed powder to boronize at least a portion of the target powder and de-boronize at least a portion of the boron iron alloy powder, thereby de-boronizing the boron iron alloy powder to reduce the melting point of the boron iron alloy powder.

The invention discloses a winding pipe with a fiber reinforced polypropylene (FRPP) reinforced hollow-structure wall. The winding pipe is divided into FRPP inner layers, high-density polyethylene (HDPE) tube outer layers and HDPE adhesion layers, wherein each FRPP inner layer and the corresponding HDPE tube outer layer form a square unit tube together, and the square unit tubes are bonded together through the HDPE adhesion layers to form the whole winding pipe. According to the design of the winding pipe, on the one hand, the ring stiffness of the tubes is improved through the high-elasticity modulus of the FRPP material, on the other hand, the ring flexibility of the tubes is maintained through the toughness of the HDPE; besides, by means of the rapidly cooling crystallization property of the HDPE material, the square unit tubes of the hollow structures can be formed rapidly, the stability of the forming process for the tubes is guaranteed, and the product performance is reliable; for another, the usage of the raw materials can be lowered, the proportion of the FRPP material in the raw materials is increased, meanwhile, the product mass is reduced, and transportation is convenient; according to the winding pipe, the production process is simple and easy to implement, and production of the winding pipe of the large diameter can be achieved.

A composite strip (10) windable to form a helical pipe for transporting fluid is disclosed. The composite strip comprises: an elongate plastic strip (11) having a base portion (12), the base portion (12) having an upper side defining an outer face (15); and at least one lengthwise extending composite rib portion (20) upstanding from the outer face (15) of the base portion (12). The rib portion (20) has a distal end (23) remote from the base portion (12). The composite rib portion comprises: an elongate inboard reinforcing member (30) disposed within or adjacent to the base portion (12); an elongate outboard reinforcing (40) member disposed within the distal end (20) of the rib portion (20) parallel to the inboard reinforcing member (30); and an elongate intermediate plastic web (23) portion extending between the inboard and outboard reinforcing members (30, 40). When wound into a helical pipe, the composite rib portion (20) reinforces the pipe against radial crushing loads.

A hollow molded article is obtained by molding a thermoplastic polyester composition comprising a blend of reinforcing fiber glass, polybutylene terephthalate with a melting point of 210 to 230° C. and polyethylene terephthalate with a melting point of 240 to 260° C., wherein at least 10% of the outer surface of the article has a continuous glossy region with a gloss of at least 75 gloss units, as measured at 60 degrees in accordance with ASTM D523 and wherein the gloss varies from the average less than 10 gloss units in the glossy region. A gas-assisted injection molding process is also disclosed for making such hollow molded articles, which articles can have various uses, including handles for appliances or the like.

The invention provides a straight pipeline for LNG return and liquid inlet. The straight pipeline comprises an outer pipeline body and an inner pipeline body. The inner pipeline body is arranged in the outer pipeline body and connected with inner pipeline flanges. The outer pipeline body is connected with an outer pipeline flange. An outer pipeline flange sealing face and a matching face are arranged on the outer pipeline flange. The horizontal plane where the matching face is located is lower than the horizontal plane where the sealing face of the outer pipeline flange is located. An inner pipeline flange sealing face and a matching edge are arranged on each inner pipeline flange, the horizontal plane where the matching edges are located is lower than the horizontal plane where the sealing faces of the inner pipeline flanges are located, and the matching edges are arranged on the matching face. A gap allowing liquid to pass is formed in each inner pipeline flange. The outer pipeline flange sealing face and the inner pipeline flange sealing faces are located in the same horizontal plane. In use, the liquid flowing into a gas dispenser flows in the inner pipeline body, and gas flowing out of the gas dispenser flows between the inner pipeline body and the outer pipeline body. By the adoption of the straight pipeline for LNG return and liquid inlet, the on-site heat preservation construction workload can be reduced effectively, the heat preservation performance of the pipeline is improved, the loss of refrigeration capacity is reduced, and BOG generation is reduced.

The invention relates to the technical field of marine polyurethane thermal insulation balance weight pipes, and discloses a hard polyurethane spraying prefabricated thermal insulation balance weight pipe with an anti-corrosion layer and a preparation method of the hard polyurethane spraying prefabricated thermal insulation balance weight pipe. The hard polyurethane spraying prefabricated thermal insulation balance weight pipe structurally comprises a steel pipe, the anti-corrosion layer, a polyurethane foam thermal insulation layer, an interface adhesive layer, a polyolefin protection layer, anti-skid particles, a concrete balance weight layer and a reinforcement steel wire mesh in sequence from inside to outside. A waterproof sealing rubber strip is bonded to the end of the anti-corrosion layer. The preparation method comprises the steps that the steel pipe coated with the anti-corrosion layer is conveyed to a polyurethane foam spraying line for spraying construction; the waterproof sealing rubber strip is bonded; an adhesive is wound, polyolefin is extruded, and the anti-skid particles are scattered; the pipe end of the polyolefin protection layer is finished after cooling; and weight balancing, finishing and maintaining of the thermal insulation pipe are carried out. The conditions of holes and uneven density cannot be generated, a pipe end waterproof cap does not need to be additionally mounted, and consistency of the pipe end and a main coating can be kept; and the shearing strength between the polyurethane foam thermal insulation layer and the polyolefin protection layer and the shearing strength between the polyolefin protection layer and the concrete balance weight layer are increased.

A plastic-coated composite steel tube comprises a steel tube body (1), wherein an external epoxy resin layer (3) is arranged on the outer wall (2) of the steel tube body (1); and an internal epoxy resin layer (5) is arranged on the inner wall (4) of the steel tube body (1). By the structure, the plastic-coated composite steel tube has the advantages of high mechanical strength, corrosion resistance, low friction coefficient, long service life and the like. Moreover, the plastic-coated composite steel tube is high in corrosion resistance, high in flame retardancy, high in antistatic property and high in weather resistance.

The invention provides a floor heating pipe easy to install, and belongs to the field of floor heating pipes and heat supply pipe fittings. The floor heating pipe solves the problem that an existing floor heating pipe is troublesome to install. The floor heating pipe easy to install comprises a floor heating pipe body and further comprises fixing assemblies. Each fixing assembly comprises an insulating plate, aluminum foil paper and a fixing clamp, wherein the insulating plate is in a square block shape, the aluminum foil paper is attached to the upper portion of the insulating plate, and the fixing clamp is in an L shape. The floor heating pipe further comprises clamping legs and clamping rings. Barbs are arranged at the ends of the clamping legs, and the clamping legs penetrate the aluminum foil paper and are fixed with the insulating plates. Each insulating plate is further provided with a strip-shaped clamping groove and a strip-shaped clamping block. The multiple insulating plates can be connected through cooperation of the clamping grooves and the clamping blocks, the clamping rings are bent into an arc structure, the fixing assemblies are pushed into the bottom of the floor heating pipe body from one side of the floor heating pipe body, the bottom of the floor heating pipe body abuts against the upper portion of the aluminum foil paper, and the side portion of the floor heating pipe body is clamped on the clamping rings. The corresponding clamping rings of the two adjacent fixing assemblies are clamped on the two sides of the floor heating pipe body. The floor heating pipe is convenient to install, and materials are saved.

The invention discloses a halogen-free metal insulating tube. The halogen-free metal insulating tube comprises a metal tube body, and an insulating layer laminated on the outer surface of the metal tube body, wherein the insulation layer comprises a substrate and a plurality of bulges arranged on the substrate; the bulges are adhered to the metal tube body; an air passage is formed between every two bulges and the metal tube body; the insulating layer is made of a polyolefin cable material; the polyolefin cable material is prepared by copolymerizing polyethylene, an ethylene-vinyl acetate copolymer, a flame retardant and a silane coupling agent through a coupling reaction. Correspondingly, the invention further provides a preparation method of the halogen-free metal insulating tube. According to the invention, the halogen-free metal insulating tube is not only simple in structure, low in cost and long in service life, but also has low smoke, flame retardance, corrosion resistance, cracking resistance, ultraviolet protection and other excellent performance.

The invention discloses a pipeline with noise reduction and thermal insulation. The pipeline comprises a pipeline body (1) and is characterized in that a hollow protective layer (2), a reinforced polyethylene layer (3) and an outer sheath (4) are sequentially arranged outside the pipeline line body (1) from inside to outside, and the hollow protective layer (2) is formed to be in a hollow shape by processing polycarbonate or polyethylene. By the structure provided by the invention, the leakproofness and thermal insulation of a primary pipeline can be greatly improved by the cooperation of the hollow protective layer, the reinforced polyethylene layer and the outer sheath, especially, the good noise reduction and thermal insulation effects can be realized when the pipeline is transported; however, the more remarkable rigidity can be provided for the pipeline by reinforcing the polyethylene layer, and the service life of the pipeline can be prolonged.

The invention discloses a bimetallic welding plastic coating composite steel pipe. The steel pipe comprises a steel pipe base pipe, anti-corrosion coatings are arranged on the inner and outer side surfaces of the steel pipe base pipe, the inner side walls of ports in the two sides of the steel pipe base pipe are each provided with a connecting steel plate, the connecting steel plates are annularlyand fully covered on the inner side wall of the steel pipe base pipe, one ends of the connecting steel plates are flush with the ports in the steel pipe base pipe, the other ends of the connecting steel plates extend to the position, at 100 to 120 mm, of the interior of the steel pipe base pipe, and the connecting steel plates are stainless steel plates with the thickness being 0.8 to 1.2 mm. Thesteel pipe has the beneficial effects that the stainless steel plates are composited in segments, required to be welded, of the two ends of the plastic coating steel pipe, and the problem that when the plastic coating composite steel pipe is welded, an inner coating is damaged by high temperature and is difficult to repair is solved.

The invention provides a nodular cast iron composite tube lined with epoxy ceramic. The composite tube comprises at least two cast tube single tubes, an attached layer is arranged on the inner wall ofeach cast tube single tube, and an epoxy ceramic layer is arranged on each attached layer; each attached layer is composed of the following components of, by weight, 35-55 parts of portland cement, 2-8 parts of silicon dioxide, 0.3-4 parts of ferroferric oxide, 5-10 parts of bentonite, 3-6 parts of nanofibers, 3-10 parts of urethane acrylate, 30-45 parts of water; and each epoxy ceramic layer iscomposed of the following components of, by weight, 40-50 parts of water-borne epoxy resin, 20-25 parts of water-borne polyurethane resin, 15-28 parts of quartz powder, 3-10 parts of isopropanol, 8-13parts of silica, 5-9 parts of aluminum oxide, and 1-15 parts of hollow glass microbeads. The anti-erosion capability of the composite tube to acid and alkali components in sewage is improved, so thatthe nodular cast iron composite tube is protected from being corroded when being buried under the soil for a long time.

The invention discloses a helical corrugated winding pipe. The helical corrugated winding pipe comprises a pipe body which is formed by helically winding and bonding an Omega-shaped belt, wherein the pipe body comprises a pipe wall and a helical corrugated structure which is arranged at the outer side of the pipe wall and is integrally formed with the pipe wall; the belt comprises a corrugated bulge, a first basal plate and a second basal plate, wherein the section of the corrugated bulge is in the shape of a circular ring which is obtained by cutting out a plane, and is provided with an open abnormal shape; the first basal plate and the second basal plate are respectively connected to the opening two sides of the corrugated bulge; one end, far from the corrugated bulge, of the first basal plate is further provided with a first connecting plate; and one end, far from the corrugated bulge, of the second basal plate is further provided with a second connecting plate. According to the helical corrugated winding pipe disclosed by the invention, in production, the belt is wound on a forming mould in a helical mode, and adjacent two turns of belts are matched and bonded together by virtue of respective first connecting plate and second connecting plate to obtain the pipe body. According to the helical corrugated winding pipe, the raw material cost is low, the production process is simple, the product cost is greatly reduced, and the product stability is good.

The invention belongs to the technical field of plastic pipelines, and particularly relates to a PE water supply pipe and a preparation method thereof.The PE water supply pipe comprises an inner blocking layer and an outer reinforcing layer, the inner blocking layer is made of nylon-modified high-density polyethylene, nylon is dispersed in the high-density polyethylene in a layered mode, and the PE water supply pipe has a good blocking effect on organic solvents and is environmentally friendly and harmless; the outer reinforcing layer is made of fiber-reinforced modified polyethylene, so that the bearing performance of the PE water supply pipe is enhanced, meanwhile, the reduction of the mechanical property of the PE water supply pipe caused by a nylon layered structure is improved, the high-performance requirement of a severe working condition environment on the PE water supply pipe is met, and the application range of the PE pipe is expanded.