For heating the pipelines of a device, is it better to use stainless steel pipes or carbon steel pipes?
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To maintain the temperature of the liquid or ensure proper flow in winter, many pipelines require heating. For conventional heating, seamless carbon steel pipes are commonly used; these pipes need to be painted and welded. In some projects, stainless steel is now used as the heating pipe, with clamping connections, which makes installation easier. However, stainless steel is more expensive. When it comes to heating pipeline systems, is it better to use stainless steel pipes or carbon steel pipes?
If money is not a concern, stainless steel tubes can be used; however, in that case, a smaller diameter tube can be chosen, which allows the total weight of the heat tracing system and the amount of insulation required to be reduced slightly.
For stainless steel, since corrosion margin is not considered, the wall thickness can be smaller, and the pipe diameter can also be smaller
The price of stainless steel seamless pipes is approximately four times that of carbon steel seamless pipes, but using stainless steel allows for a reduction in weight; therefore, the difference in cost due to the material difference is not as significant as one might think
Judging from the image in question, the disadvantages of using carbon steel pipes for heating stainless steel pipes are quite evident
Stainless steel instrument tubing provides good heat tracing performance; copper tubing can also be used, and both offer significantly better results than carbon steel tubing. Heat tracing for many root valves is simply not feasible using carbon steel tubing. However, stainless steel and copper tubing are expensive, so it is recommended to consider the total cost over the long term when choosing between these materials.
It is indeed necessary to consider the investment cost. Another key factor is the expected lifespan of use. Personally, I recommend using carbon steel if the intended usage period is around 5 years; for periods longer than 5 years, stainless steel would be a better choice. From personal experience, using carbon steel over an extended period makes subsequent repairs very difficult, and the costs associated with repairs and insulation, among other things, also mean that the area won’t remain clean.
It is recommended to use the same material as the insulated pipeline, including the wire used for fixation.
Modern chemical processing units have a service life of well over five years, right?