Manufacturing method of thin-walled stainless steel composite pipe

Abstract

Manufacturing method of thin-walled stainless steel composite pipe. Steps: 1) making a thin-walled stainless steel inner circular tube with a tire mold. 2) A plurality of reinforcing rings are made of thin-walled stainless steel, and are uniformly distributed and fixed axially on the outer surface of the inner circular tube. 3) Several pieces of ribs are evenly distributed along the circumference between the adjacent reinforcement ring wall plates. 4) Fix the steel ring on the outer periphery of the rib; form the tube skeleton. 5) Concrete is poured outside the framework to form a cement protective layer. Reinforcing rings, ribs and steel rings increase inner tube strength and pipe ring rigidity. The port reinforcement ring can be used as a sealing ring when connecting. The pipe skeleton can withstand sufficient water pressure, ring rigidity and pull-off force. The cement protective layer has high mechanical strength and can meet all the mechanical properties of the composite pipe. Tire mold production, ellipticity is small. The inner circular pipe adopts different corrosion-resistant materials, which can meet the needs of different pH values ​​of the conveying medium, that is, meet the various high-end needs of all sewage and chemical raw material transportation and waterworks. The cost is controllable and can replace ductile iron plastic pipes. Hygiene, safety performance and life are fully optimized. Can be used for sewage drainage and tap water.

Description

(1) Technical field [0001] The invention relates to a method for manufacturing a large-diameter stainless steel composite pipe, which belongs to the pipe category (F16L). (2) Background technology [0002] No matter the existing large-caliber drainage pipeline adopts plastic pipe, or ductile iron pipe, or carbon steel pipe, there are fatal defects. Plastic pipes: poor ring rigidity, unable to withstand ground vehicle rolling; water leakage at the interface; plastic aging, short life. Ductile iron pipe: too heavy, very difficult to install and lay. Carbon steel pipes: easy to corrode and perforate. [0003] The stainless steel pipes designed in the market now have the advantages of high ring rigidity, strong corrosion resistance, and environmental friendliness (no pollution to the environment). The interface can be connected by welding. When the material is selected properly, the service life is almost semi-permanent. [0004] Now domestic large-scale sewage treatment pla...

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Problems solved by technology

[0005] The manufacturing method of the thin-walled stainless steel composite pipe provided by the present invention is to solve the problems of high cost and insufficient performance of the existing disclosed stainless steel drainage pipes, and provide a thin-walled stainless steel with high strength and high cost performance, which can meet the transportation of sewage with various pH values Composite pipe production method

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