At present, the stainless steel electric heating tube is the most popular and most popular one on the market. How to get the stainless steel electric heating tube in place in the process of use, I believe many people are also thinking about this issue? As our business, we all know that the electric heating tube is small in size and very powerful, so the temperature change is relatively large. If the internal structure is unscientific, problems such as water leakage, decreased insulation resistance, and perforation will occur. The selection of materials in the manufacture of stainless steel electric heating tubes is also very important, and special attention should be paid to the internal stress caused by the uneven heat transfer of stainless steel. Related experiments can be done to verify the practicability of the design. Only in this way can the usability of the product be ensured and the advantages of the stainless steel electric heating tube can be used.
Comparison of stainless steel electric heating tube and ordinary heating tube:
Stainless steel electric heating tube: good heat resistance, dry burning resistance, relatively mature technology, and relatively low cost. The nickel content reaches 27%. (The nickel content must reach 27% to make the stainless steel electric heating tube have a significant change in corrosion resistance in some media). In terms of materials, 316, 800, 840 and other stainless steels are relatively strong in corrosion resistance and high temperature resistance. 800 stainless steel contains 30% nickel, and special materials are used.
Ordinary heating tube: the nickel content is only 24%, and the nickel content must reach 27% to make the heating tube have obvious changes in the corrosion resistance of some media. In terms of material, 840 stainless steel contains 20% nickel, and 304 stainless steel contains only 8% nickel. In terms of cost, stainless steel 304 is sufficient for normal heating water.
The performance of the heating tube is not only affected by the material, but also has a great relationship with the water quality. The heating tube is heated in the flowing state of water, and the surface temperature of the heating tube reaches 90°C-120°C. The calcium and magnesium ions in the water will precipitate at 60°C and form scale. As a result, the heat transfer performance of the heating element is deteriorated, the heat inside the heating tube cannot be dissipated, and the tube burst phenomenon may occur. Therefore, it is usually necessary to clean the scale on the surface of the pipe frequently to extend the service life of the heating. Customers in some areas with poor water quality can choose stainless steel 800 to extend the service life of the product, but the cost ratio is very high
