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Stainless steel pipe machine:Can stainless steel welded pipes be used as heat exchanger tubes?



Stainless steel pipe machine:In the past five years, the development trend of stainless steel welded pipes is relatively good, and great progress has been made in all aspects of scale, quality, and production technology, especially as the field of demand is gradually expanding. In addition, as the process of stainless steel welded pipes becomes more and more mature, stainless steel seamless pipes can be gradually replaced in many applications, such as heat exchanger equipment pipes, medium and low pressure boiler pipes, etc.

Can welded pipes be used on heat exchange equipment?

A misunderstanding in choosing heat exchanger tubes on the market today is that stainless steel welded tubes cannot be used as heat exchanger tubes, but GB/151-1999 clearly stipulates that when the tube pressure is ≤6.4MPa, stainless steel welded tubes can be used. Especially now that the production process of stainless steel welded pipe is very mature, it can fully meet the needs of general heat exchanger tubes and shows its unique advantages.

Austenitic stainless steel welded pipe will become the first choice.Because the austenitic stainless steel welded pipe has good corrosion resistance and smooth surface, and the production process is mature. 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 heat transfer. When a small diameter tube is used, the heat exchange area per unit volume of the heat exchanger is relatively large, the equipment is relatively compact, the metal consumption per unit heat transfer area is small, and the heat transfer coefficient is also high. Although it is troublesome to manufacture, the use of austenitic stainless steel welded pipe as a heat exchange tube can avoid the above problems.