About the choice of shell material of electric heating tube

As a professional manufacturer of electric heating tubes, it is necessary to have professional qualities to help customers choose electric heating tubes suitable for their use. When choosing a suitable electric heating tube, the shell material of the electric heating tube must first be considered. The electric heating tube is used as an electric heating device. Important heating elements, according to different working environments, the choice of materials is very important, and it plays a vital role in the life and quality of the electric heating tube. Next, our heating technology tells customers about the experience in choosing the material of the electric heating tube shell.

1. Stainless steel heating tube There are many different grades of stainless steel for heating tube, such as stainless steel 304, stainless steel 321, stainless steel 316L, stainless steel 310S and so on. Conventional non-alkaline water and oil can be heated with stainless steel 304. Some acid and alkaline liquids use stainless steel 316L, but strong acid and strong alkali are not suitable for stainless steel 316L. From the perspective of temperature resistance, the general working temperature is Stainless steel 304 can be used for around 300 degrees, stainless steel 321 is recommended for working temperature around 500 degrees, and stainless steel 310S is recommended for higher temperatures. The above is purely personal experience, not accurate theoretical values, and for reference only.

2. Titanium electric heating tube Titanium electric heating tube is generally suitable for chromium plating, acid copper, nickel plating, passivation, filling, oxidation bath, chromic acid anodization, phosphating acid tin plating and other processes, so the price of titanium electric heating tube is also Relatively high.

3. Teflon electric heating tube Teflon electric heating tube is also called Teflon electric heating tube, polytetrafluoroethylene electric heating tube, commonly known as PTFE tube. Teflon heating tubes are generally suitable for corrosive liquids such as strong acids and alkalis. The general process temperature is ≦105℃. The advantages of Teflon heating tubes are non-sticking, non-scaling, uniform surface heat dissipation, but the price is also high , Due to the low temperature requirements, the surface load should not be too high when designing, so the Teflon electric heating tube has low power and high cost, so there are few customers who use Teflon electric heating tube.

4. Quartz heating tube Quartz heating tube is generally suitable for anti-corrosive liquids, except for hydrofluoric acid. The disadvantage is that it is extremely fragile.

5. Feiyu coated electric heating tube Feiyu coated electric heating tube can be described as a "universal heating tube" among liquid heating tubes. Generally, acidic or alkaline liquids can be heated with coated electric heating tubes. It can almost replace the Teflon heating tube. Generally, the power per meter of the Teflon heating tube can only reach about 400W/m. The use of coated electric heating tubes solves the problem of low power. In addition, the biggest function of the coated electric heating tube is It can be used to prevent scale. Scale is a fatal factor for the short life of the heating tube. Scale prevention can greatly extend the life of the heating tube!

It is worth mentioning that according to our practical experience, according to the strength of acid and alkali from weak to strong, we generally choose the order of materials for stainless steel 304 electric heating tube, stainless steel 316 electric heating tube, Teflon electric heating tube, and titanium electric heating tube. Prices have also increased sequentially.