Stainless steel composite polymer pipes for the heat exchanger industry

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Unlike ordinary composite pipes with stainless steel on the inner layer and carbon steel on the outer layer, the \"stainless steel composite heat exchange tubes\" for boilers and heat exchangers developed by our company utilize a unique 3D polymerization technique to increase the interlayer bonding strength between the inner stainless steel layer and the outer carbon steel layer from 0.2 MPa to over 210 MPa, an improvement of 1,050 times. Experts say that 0.2 MPa, when converted into pressure, is roughly equivalent to a force of 20 kilograms; a stronger young man can use tools to separate the different metal layers within such composite pipes under this combined force ； As for composite pipes with an interlayer bonding strength of 210 MPa, there are almost no mechanical methods to tear them apart. The bonding rate of this stainless steel composite heat exchange tube is 100%, and its mechanical properties, corrosion resistance, non-destructive testing results, pressure-bearing capacity, and plastic processing characteristics all meet the requirements for use in boilers and heat exchangers. Stainless steel polymerized heat exchange tubes – an upgraded version of seamless stainless steel heat exchange tubes. Feature 1: High bonding strength of 210 MPa with a 100% bonding rate. An innovative triple-composite manufacturing process is used, which completely solves the problem of low interlayer bonding strength associated with conventional bimetallic composite tubes. Its bonding strength and heat transfer performance exceed the standards of existing composite pipes. The interlayer bonding strength increased from 0.2 MPa in conventional composite pipes to over 210 MPa, a rise of 1,050 times. The combination rate reaches 100%. Feature 2: Its thermal conductivity is 200% that of pure stainless steel pipes. Extensive experimental tests conducted by authoritative institutions have shown that the thermal conductivity of stainless steel polymerized heat exchange tubes is 150–200% that of pure stainless steel pipes at different operating temperatures. Feature 3: Its pressure resistance is greater than or equal to that of seamless steel pipes of the same specification. Stainless steel polymerized heat exchange tubes are used in industrial applications such as boilers, heat exchangers, and pressure pipelines, and they can indeed achieve an excellent pressure resistance level of 1+1≥. Through repeated blasting experiments, it has been shown that the pressure resistance of stainless steel polymerized heat exchange tubes is greater than or equal to that of seamless steel tubes of the same specification. Feature 4: Excellent machinability. Stainless steel polymerized heat exchange tubes possess outstanding overall mechanical properties as well as mechanical strength; they can be subjected to various plastic processing methods, and can be connected using flexible techniques such as welding and threading. Stainless steel polymerized heat exchange tubes use high-precision carbon steel pipes as the base material, and thin-walled stainless steel pipes as the material for corrosion resistance. Through a novel three-material composite manufacturing process, these two different types of pipes are combined seamlessly, resulting in excellent heat transfer performance and high bonding strength. The main applications and benefits lie in the boilers and heat exchanger devices manufactured using stainless steel polymerized heat exchange tubes, which are used in various industries such as petroleum, chemicals, power plants, shipbuilding, refrigeration, food processing, pharmaceuticals, the nuclear industry, and the military industry. It can significantly reduce operating costs, greatly improve a company’s production efficiency, and substantially enhance its competitiveness in the global market. This product meets the green production requirements of the aforementioned industries, enabling energy conservation, emission reduction, and environmental protection, thereby bringing significant economic and social benefits. Production process: Prepare raw materials for the inner and outer tubes → Lubricate the outer surface of the outer tube → Lubricate the inner surface of the inner tube → Wrap a polymer layer around the outer surface of the inner tube → Assemble the inner and outer tubes together → Trim excess material → Draw the tubes → Treat them in a reducing atmosphere → Cut off the ends to reach the desired length → Straighten the tubes → Inspect them for defects → Clean the semi-finished products → Soak them in rust preventive solution and drain the excess liquid → Package them and store them for shipment.