The stainless steel heat exchange tube is one of the components of the heat exchanger and is used for heat exchange between two media.
However, the editor believes that there are still many people in the society who do not know much about it, including their specifications and materials. Therefore, a summary is specially made for everyone to understand.
Stainless steel heat exchange tube specifications
The commonly used heat exchange tubes are mainly Φ10mm---Φ114mm, and the thickness is 0.6mm---3.0mm; the length can be customized according to actual needs. Due to the large fluid resistance of the small diameter pipe, it is inconvenient to clean and easy to block, but the large diameter stainless steel pipe is different. Its fluid resistance is not as large as that of small pipe diameters, which is convenient for us to clean. Therefore, small diameter pipes are used for clean fluids, while larger diameter pipes are used for viscous or dirty fluids.
Stainless steel heat exchange tube material
Two widely used austenitic stainless steels, 304 stainless steel and 304L stainless steel, are used in stainless steel heat exchange tubes. As for, which is better, 304 stainless steel or 304L stainless steel? It depends on their properties and production process.
Let's take a look at the basic performance first. The core function of the heat exchange tube is to conduct the heat generated by the gas. The better the thermal conductivity, the better the heat exchange. 304 stainless steel and 304L stainless steel have the same thermal conductivity.
From the production process point of view, the processing of stainless steel heat exchange tubes is very difficult, and the internal structure and welding process are very demanding. If there is carelessness in the manufacturing process, it will affect the quality of the whole machine, and the manufacturing process will also face risks. 304 stainless steel and 304L stainless steel can be used for hot processing such as stamping and bending without heat treatment and hardening. It can be seen that the properties of the two stainless steels in general use are similar.
However, 304L stainless steel has better weldability than 304 stainless steel. After welding or stress relief, it can still maintain excellent resistance to intergranular corrosion, and its thermal shock resistance is also higher than that of 304 stainless steel, making the whole machine more stable and reliable.
