The wall thickness is thinned, the diameter is increased, the water resistance is reduced, the flow rate is increased, the outlet water temperature is reduced, the logarithmic average temperature difference is reduced, and the result of the comprehensive effect is: the relative vacuum is increased. The inner and outer surfaces of stainless steel pipes are smooth and not easy to scale, which can effectively reduce the number of cleanings and reduce maintenance costs. The stainless steel pipes are wear-resistant and vibration-resistant, and have a long service life.
The wall thickness is thin, the weight is lighter than that of copper pipes, and the relative investment is reduced. The material has strong toughness, yield and tensile strength are better than copper pipes. In addition, the expansion mouth of stainless steel pipes only expands but does not weld, even if it is affected by thermal expansion and contraction. No leakage will occur. Therefore, stainless steel pipes are ideal heat exchange pipes to replace copper pipes.
A summary of the advantages of
stainless steel heat exchange tubes mainly include high thermal conductivity, smooth inside and outside tube walls that are not prone to scaling, higher tensile, bending, and yield strengths than copper tubes, and a certain compensation function; strong pressure-bearing capacity, resistance to vibration; and resistance to corrosion. Sex is higher.
However, stainless steel heat exchange seamless pipes also have some shortcomings, because there are two production processes for seamless steel pipes, namely cold drawing and cold rolling. The cost of cold drawing is low, but the quality cannot be guaranteed and pressure vessels cannot be used.
The cold rolling process is complex and costly. Even if the stress is eliminated by heat treatment, the microcracks and wall thickness will be uneven in size during the rolling process, making pitting corrosion and other quality problems prone to occur.
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