In recent years, in addition to steel pipes, copper pipes, stainless steel pipes and other single-material pipes, various composite pipes have also emerged. Carbon steel lined stainless steel composite pipes have good technical characteristics and application prospects due to the advantages of internal and external two-layer metal pipes. The announcement approves the lined stainless steel composite pipe as the product standard of the urban construction industry. The serial number is implemented from year, month and day. The carbon steel lined stainless steel composite pipe is composed of the base pipe material and the lining material. Steel welded pipe or alloy steel seamless pipe lining material is made of high-quality stainless steel pipe. Because it takes into account the advantages of both internal and external pipes, it also overcomes their respective shortcomings and greatly improves the resistance of the composite pipe in the process of water, hot water and gas transportation. The corrosion performance retains the advantages of good sealing and low price of the steel pipe connection. It overcomes the defects of the plastic pipe that uses the clamping connection that is easy to leak and the plastic pipe is easy to aging. The quality of the pipe is reliable, and the stainless steel lined composite pipe is lined with stainless steel lined welds. Inspection to ensure the quality of welds is reliable. Outsourcing steel pipes that meet the standards of the Ministry of Metallurgy have been specially processed to combine the two into one. Both can prevent corrosion and maintain the purity of the medium and have sufficient strength and high temperature resistance. After strict scientific testing, various technical data are Reached the standard of seamless steel pipe for fluid transportation, especially the weld of outer steel pipe and stainless steel pipe is not in the same position, which improves the strength and reliability of the composite steel pipe The characteristics of the application of carbon steel lined stainless steel composite pipe and the application of new building materials and construction technology are non-fouling, nodulation, corrosion-resistant, lined stainless steel composite pipe is in the outer layer of steel pipe composite stainless steel pipe and stainless steel pipe lined matching stainless steel pipe fittings due to Steel contains a certain proportion of chromium. During use, the inner wall of the pipeline forms a very thin chromium oxide film. This film prevents the metal from continuing oxidation. The stainless steel has a strong corrosion resistance. It can not only withstand the corrosion of water and air, but also withstand it. Weak acid and alkali corrosion, good hygienic performance, good safety, good lining Steel water purification pipe can replace pure stainless steel pipe and pure copper pipe to transport drinking water. Lining stainless steel composite pipe and stainless steel pipe fittings can effectively prevent secondary pollution to water quality. The liner stainless steel composite pipe system is in contact with the transmission fluid. The stainless steel material is hygienic, environmentally friendly, and safe. It meets the requirements of ecological housing and the people-oriented concept of the era. The outer steel pipe in the high mechanical strength and high extension lined stainless steel pipe adopts carbon steel seamless pipe, carbon steel welded pipe or alloy steel seamless pipe. The tensile strength of the corresponding wall thickness steel pipe is not less than the elongation is not less than the hydraulic pressure test required by the steel pipe. The bending test or deflection test specified in the outer steel pipe after the composite stainless steel pipe makes the total wall thickness increase. The strength increase can not only be used for Civil water and gas transmission and can be used to transport industrial fluids. Traditional process installation and installation is convenient and convenient. The connection method is easy to use. It can be used for thread connection and flange connection, and can also be welded at the construction site. Welding can be intercepted at will. The original plumber needs to be trained and the construction can be carried out. The original galvanized steel can be used The standard and design and construction specifications of the pipe are easy to enter the market. The connection method of the composite pipe is as follows. The threaded connection is suitable for the following pipe diameter flange connection. The stainless steel lined pipe is the outer layer of the steel pipe. The composite stainless steel pipe can reach the above temperature resistance. The tensile strength is still higher than that of ordinary steel at room temperature. It can be used to transport hot water and boiling water. The material is a metal composite tube, so it is resistant to high temperatures and the thermal expansion and contraction coefficients of the two materials inside and outside are very close. Therefore, even if the temperature changes greatly, the composite tube will not be damaged and will not age. Surface oxidation and corrosion When the chromium content in stainless steel exceeds, an extremely thin chromium oxide film is formed on the surface of the stainless steel to protect the metal from oxidation, so the stainless steel will not rust. The base pipe and liner are metal materials. The tube has higher temperature resistance and high pressure resistance, which is twice the life of ordinary carbon steel pipe. Low temperature, brittleness, good expansion coefficient, small lined stainless steel net The elongation of the outer steel pipe of the pipe reaches the elongation of the inner stainless steel pipe to ensure that the outer steel pipe with the elongation and expansion can be lined with the stainless steel pipe with better elongation to avoid the brittle fracture of new building materials and construction when the water in the pipe freezes and expands Technical table Price comparison of nominal diameter of stainless steel water purification pipe and various pipes. Pipe name Galvanized pipe, stainless steel pipe, aluminum-plastic composite pipe, plastic composite copper pipe, copper pipe lined with plastic composite pipe, stainless steel water purification pipe. It has chemical properties such as anti-rust, oxidation resistance, acid and alkali resistance, good intergranular corrosion resistance, etc. Its anti-rust and anti-corrosion performance is superior to other materials. If there are special needs, it can also be lined with a variety of rare metal materials such as titanium copper and aluminum to achieve different Corrosion resistance requires that the corrosion rate of stainless steel in nitric acid is less than the corrosion rate in boiling acetic acid per year is less than the corrosion rate in citric acid is less than the corrosion rate in potassium hydroxide is less than the time The corrosion rate in is less than the corrosion rate in sulfuric acid every year. It is lined with stainless steel pipes and stainless steel pipes can be used to transport weak acid or Alkaline chemical fluid inner wall smooth fluid flow resistance lined stainless steel pipe is made of cold-rolled stainless steel band welded cold-rolled stainless steel belt surface is smooth and smooth, so stainless steel pipe inner wall smooth pipe fluid resistance is small, non-scaling fluid non-polluting stainless steel pipe inner wall transport The steel pipe and concrete pipe of the water roughening system are poor times. When the lining stainless steel pipe is compared with the metal pipe with the same water cross section, the water flow rate can be increased under the same head loss condition. The low-cost lining stainless steel pipe is lined with the outer steel pipe The stainless steel pipe reduces the manufacturing cost and ensures the thickness to ensure the strength. The price comparison of the nominal diameter of the stainless steel water purification pipe and the various pipes. The price comparison of the various pipes. The use of composite pipes and polypropylene pipes is much lower than that of stainless steel pipes and copper pipes. The use of carbon steel lined stainless steel composite pipes is very wide. The uses of carbon steel lined stainless steel composite pipes are very wide. They are mainly used in civil and industrial applications. The development and application of water pipes can be applied to the pure drinking water pipelines of hotel utilities. With the trend of prohibiting the use of galvanized water pipes, all manufacturers of galvanized pipes will face the elimination of stainless steel pipe lining in the market that has been eliminated by the market. The successful development of these enterprises has brought vitality to these enterprises. At present, there are many domestic pipe manufacturers engaged in stainless steel lining The research, development, production and sales of composite pipes have a wide range of application space. For example, they can be used in the fields of oil refining, petrochemicals, power, metallurgy, pharmaceuticals and food processing. Impact resistance and can save a lot of precious metals. In the grain transportation, if the lined stainless steel composite pipe is used, it is more hygienic and because of the small friction coefficient, the transportation speed can be greatly accelerated. Energy saving, especially the oil department lined stainless steel composite pipe can show its talents in oil transportation. The application of lined stainless steel composite pipe can greatly reduce the phenomenon of pipeline hanging wax and improve the oil delivery rate. Due to the greatly improved acid and alkali resistance, the life of the oil pipeline is increased. New building materials and construction technologies
