Stainless Steel Tubes for Heat Exchangers

In the past five years, the development trend of stainless steel welded pipe has been relatively good. Regardless of scale, quality, and production technology, there have been relatively great progress, especially its demand field is gradually expanding. In addition, as the stainless steel welded pipe technology becomes more mature, it can gradually replace with SS seamless pipes, CS pipes & MS pipes. Applications, such as: heat exchanger's tubes, medium and low pressure boiler's tubes, and so on.

1. Higher standard product tubes are possible

The heat exchanger tube is an indispensable part of the heat exchange equipment, and the heat exchanger tube is generally selected according to the pressure and the fluid medium. Now one of the misunderstandings in the selection of heat exchanger tubes on the market is that stainless steel welded tubes cannot be used as heat exchanger tubes, but GB / 151-1999 clearly stipulates that stainless steel welded tubes can be selected when the tube side pressure is ≤6.4MPa. Especially our production process of stainless steel welded pipes is now very mature, it can fully meet the needs of general heat exchanger tubes, and shows its unique advantages.

2. The production process is mature, so austenitic stainless steel welded pipe will be the first choice

Since the heat exchanger tube constitutes the heat transfer surface of the heat exchanger, the size of the heat exchanger tube has a great influence on the heat transfer. When using small diameter tubes, the heat exchange area per unit volume of the heat exchanger is larger, the equipment is relatively compact, the metal consumption per unit heat transfer area is less, and the heat transfer coefficient is also higher. Although it is troublesome to manufacture, the use of austenitic stainless steel welded tubes as heat exchanger tubes can avoid the above problems. Because austenitic stainless steel welded tubes have good corrosion resistance and smooth surfaces, and the production process is mature, so austenitic Stainless steel welded tubes are the first choice for heat exchanger tubes.