How to choose the surface material of the flange heating element?
1. Stainless steel flange heating element
There are many different grades of stainless steel for flange heating element, such as stainless steel 304, stainless steel 321, stainless steel 316L and so on. The normal flange electric heating tube mainly chooses stainless steel 304 material, which is also the material that customers choose the most in the work. The stainless steel 321 is better than the stainless steel 304 material. Stainless steel 316L is generally suitable for liquids with PH>7-14, that is, suitable for alkaline liquids, but it is generally not recommended to use in strong acids and alkalis.
2. Titanium flange heating element
Titanium flange electric heating pipes are 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 flange electric heating pipes is also compared high.
3. Teflon flange heating element
Teflon flange electric heating tube is also called Teflon flange electric heating tube, PTFE flange electric heating tube, commonly known as PTFE tube. Teflon flange electric heating tubes are generally suitable for corrosive liquids such as strong acids and alkalis. The general process temperature is ≦105℃. The advantages of Teflon flange electric heating tubes are non-sticking, non-scaling, and uniform surface heat dissipation, but The price is also high.
4. Quartz flange heating element
Quartz flange heating element are generally suitable for anti-corrosive liquids, except for hydrofluoric acid.
It is worth noting that, according to the experience in practice, according to the strength of acid and alkali from weak to strong, we generally choose the order of materials: stainless steel 304 flange electric heating tube, stainless steel 316 flange electric heating tube, Teflon flange electric heating Tube, titanium flange electric heating tube. Prices have also increased sequentially.