After years of testing, stainless steel has been used in various fields. For stainless steel heat exchangers, it is still a relatively new industry. One of the important equipment that plays an important role in many fields, and heat exchange tubes and condenser tubes are its important components, which directly affect the service life, safety, and economy of the unit. The number of tubes used in heat exchangers and condensers is very large , its cost accounts for 60%-80% of the cost of heat exchangers and condensers. Therefore, the selection of cost-effective metal materials for heat exchange tubes and condenser tubes is a key link. The materials used for heat exchange tubes and condenser tubes should have excellent heat transfer performance, and should also have good corrosion resistance, erosion resistance, and abrasion resistance. They should also have good strength, rigidity, and plasticity, and are easy to process and manufacture. In the 1980s, copper tubes were first used in heat exchange tubes and condenser tubes in my country. Copper has abundant resources in my country. Copper also has excellent thermal conductivity and ease of processing. At that time, our domestic price was relatively moderate. It is widely used in heat exchange tubes and condenser tubes. At that time, the stainless steel industry was still in its infancy in my country, and its high price made stainless steel pipes not widely used. In theory, the corrosion and erosion of fresh water on copper pipes is very small, but with the development of industry and agriculture in our country, environmental pollution has become more and more serious. By the 1990s, the water quality in most parts of our country had seriously declined. , Various harmful substances in the water have caused increasingly serious corrosion to the pipe material, which has forced copper pipes to withdraw from the application range of heat exchange pipes and condenser pipes. In the mid-1990s, various grades of stainless steel materials were applied to all walks of life, and stainless steel seamless pipes were applied to heat exchange pipes and condenser pipes. As early as the 1960s, stainless steel pipes were used abroad. Instead of copper tubes, it is used in heat exchange tubes and condenser tubes, and good results have been obtained.