Since the surface of the stainless steel tube will form a thin protective film, although the protective film is about 3×10-6 mm, it is very tough. Even if it is destroyed, as long as there is oxygen next to it, it can be regenerated immediately to prevent rust. As long as you know the characteristics of stainless steel and use it correctly.
Under the condition of less corrosiveness such as water pipes or hot water of 100 °C, there is almost no need to worry about rusting, and there is no need to worry about the smaller inner diameter or the increase of resistance caused by the common "rusting projections" generated in galvanized steel pipes. Larger phenomenon, you can get water flow that will not be blocked.
Thin-walled stainless steel pipes require only about one-third of the thickness of galvanized steel pipes due to their high corrosion resistance and mechanical properties. Therefore, the weight of the pipe is greatly reduced, and the cost is also reduced, making the handling easier and the installation more convenient.