Technical Articles
Reasons for using stainless steel heat exchanger tube
Posted: 06/29/2020 17:28:57 Hits: 11
A heat exchanger is a device that transfers part of the heat of the hot fluid to the cold fluid, which is mainly used in the fields of petroleum, chemical boilers, metallurgy, electricity, ships, heating, refrigeration and air conditioning, machinery, food, pharmaceuticals, etc.; it can be used as a heater, cooler, condenser, evaporator and reboiler in the production of chemical boiler; used as a condenser in the air-conditioning industry. In the past, copper tubes have been used in heat exchanger, but with the advancement of production technology and changes in user needs, stainless steel tubes have gradually replaced copper tubes as heat exchanger tube. But why can stainless steel tubes replace copper tubes for heat exchanger? In other words, what are the advantages of stainless steel pipes? Below, we will tell you the answer.
Compared with copper pipes, the advantages of stainless steel pipes are:
1. Pipe wall thickness. Because of strength and wear, the thickness of copper pipe cannot be less than 1.2mm, while the thickness of welded stainless steel pipe can be as thin as 0.5-0.8mm. According to the law of heat conduction and thermal resistance, if the coefficient of thermal conductivity remains unchanged, the smaller the thickness of the pipe wall, the smaller the thermal resistance and the greater the heat transfer coefficient. Therefore, the overall heat transfer coefficient between the stainless steel tube and the copper tube can be reduced by reducing the wall thickness. Under the same heat exchange area, the overall heat transfer coefficient is 2% to 8% higher than that of the copper tube.
2. Oxidation resistance. As we all know, stainless steel pipes have strong oxidation resistance, while copper pipes have poor oxidation resistance, which is easy to generate "patina", and as the use time increases, the oxide layer of copper pipes will become thicker and thicker, and the internal dirt will also be more and more, the heat transfer effect will become worse. However, the stainless steel tube will basically not oxidized. Even if it is oxidized, the speed of oxidation is slow. And the inner wall is relatively smooth, so that the thickness of the bottom layer of the boundary laminar flow is reduced, and it is not easy to form fouling on the inner wall. Therefore, the heat transfer effect of the copper tube will become worse and worse over time; while the heat transfer life of the stainless steel tube is not affected by time Impact.
3. Material hardness. The stainless steel tube has a strong hardness, which can improve the impact resistance and vibration resistance of the heat exchanger. The stainless steel heat exchanger tube uses a differential pressure for leak detection, and there is no pressure drop for 5 minutes.
In general, although the heat exchange effect of copper tubes is better than that of welded stainless steel tubes, the material of stainless steel pipe is special, and the wall thickness can be reduced to shorten the gap with the copper pipe, and the welded stainless steel is not easy to be oxidized, and no dirt will accumulate inside. So if it is used for a long time, the heat exchange effect of welded stainless steel pipe is better.
Well, the above is the reason why the heat exchanger uses stainless steel tubes and the advantages of stainless steel tubes. I hope you know more about heat exchanger tubes. In addition, we also want to remind everyone: When choosing heat exchanger tubes, try to choose professional, large-scale heat exchanger tube manufacturers, such as Landee Pipe, a Division of Xiamen Landee Industries Co., Ltd. Our company has obvious advantages in the field of welded stainless steel pipes, stainless steel heat exchanger tubes, and threaded stainless steel tubes.
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Landee Pipe is a professional
industrial pipe manufacturer based in China, we have been producing pipe for a variety of applications, and covering areas of pipe manufacturing, exporting and trading. welcome to access our website: https://www.landeepipe.com.
