Share The Selection Skills Of Selecting Raw Materials For Tubular Heaters
The stainless steel tubular heater is made of stainless steel as the sheath, magnesium oxide rod as the inner core, magnesium oxide powder filler, and nickel-chromium wire as the heating wire. It can be roughly divided into cartridge heater and double-end tubular heater.
1. The principle of pipe selection: temperature resistance and corrosion resistance
2. Selection of resistance wire.
Stainless steel 303 material, because it contains sulfur, is easy to cut. It is mainly used for convenient cutting and occasions that require high surface finish of stainless steel.
Among the factors that affect the quality of stainless steel tubular heaters, the quality of materials accounts for a very important reason. Reasonable selection of raw materials for tubular heaters is a prerequisite for ensuring the quality of tubular heaters. The choice of material includes the following points for reference:
Compared with stainless steel 304, stainless steel 304L has a lower carbon content. The low-carbon stainless steel near the weld is affected by heat and has less carbides during welding, so carbon emissions are minimized, because carbides will produce welding corrosion . The 305 material has a higher nickel content and is easy to form because of the lower work hardening rate. Stainless steel 308 is generally used in the manufacture of welding rods.
3. Selection of magnesium oxide powder.
4. Selection of sealing materials. First of all, stainless steel 301 is used for various high-strength occasions due to its hardening phenomenon during processing and deformation. In the process of manufacturing stainless steel heating tube, stainless steel 304 is used, which is widely used in heating liquid (without strong acid and alkali) and air heating. It has good comprehensive performance, easy to shape and moderate price. Used more in manufacturing
Stainless steel 302 is actually a higher carbon content than 304, and it has higher strength after cold rolling.
