How does the finned tube prevent freezing and cracking due to low temperature?

How does the finned tube prevent freezing and cracking due to low temperature?

Spiral finned tube is a derivative product of finned tube. Finned tube is a kind of heat exchange element. The main reason is that adding fins on the surface of the heat exchange tube can improve the heat exchange efficiency. After changing the fin to a spiral shape , its heat transfer area is several times or even dozens of times higher than before, and the spiral fins are more efficient heat transfer elements. At present, this product has been widely used in various boilers. The product can also be manufactured by various methods, such as integral spiral finned tubes, high-frequency resistance welding spiral finned tubes, etc. Frequent use of products, regular maintenance and appropriate maintenance methods is essential.

Regularly check the degree of adhesion between the rubber gasket and each finned tube to avoid leakage caused by rubber gasket degumming. Every time the fins are re-pressed, it is necessary to pay attention to the scale position of the last pressing to prevent the rubber gasket from being over-extruded and reducing the service life. When replacing the rubber gasket of the spiral finned tube, it is necessary to replace the entire section to avoid uneven gaps between the sheets and affect the heat transfer effect.

The design of the heating system should try to avoid the communication between the system and the big oxygen, that is, as airtight as possible, such as the position of the exhaust cock, the closure of the circulation pump, etc., and at the same time avoid generating low pressure during the operation of the equipment, which also avoids unnecessary dehydration. When the heating is stopped, the finned tubes are maintained by dry method or deoxygenated water. When the newly installed finned tube is tested for pressure, the water pressure test medium should be added with water solvent, non-toxic anti-rust agent.

The heat exchange area has a large margin. During the use of the finned tube in winter, due to the low flow rate of the heat medium, the inside of the coil on the fresh air side will freeze, which will damage the finned tube. The finned tubes are not handled well during the installation and piping process, so that there is water in the low point, which is easy to freeze in winter, thus cracking and damaging the finned tubes. The heat exchange area of the finned tube should not leave too much margin. And if the heating area is far away, the air cooler is placed behind the air heater, which can avoid this problem. If it is smaller than the cooling area, then the air heater can be installed alone to avoid waste.