How to choose the surface material of flange heating tube?

How to Choose the Surface Material for Flange Heating Tubes?

As a key heating element in electric heating equipment, flange heating tubes require a critically important material choice, tailored to the specific operating environment. This material plays a crucial role in determining their lifespan and quality. Below, we'll share our experience selecting materials for flange heating tubes.

1. Stainless Steel Flange Heating Tubes

Flange heating tubes come in many different grades of stainless steel, such as 304, 321, and 316L. Typical flange heating tubes are primarily made of 304 stainless steel, which is the most popular material. 321 stainless steel is a better choice than 304. 316L stainless steel is generally suitable for alkaline liquids, but is not recommended for use with strong acids or bases.

2. Titanium Flange Heating Tubes

Titanium flange heating tubes are generally suitable for processes such as chrome plating, copper plating, nickel plating, passivation, filling, oxidation tanks, chromic acid anodizing, phosphating, and acid tin plating. Therefore, titanium flange heating tubes are relatively expensive.

3. Teflon Flange Heating Tubes

Teflon flange heating tubes are also called Teflon flange heating tubes, polytetrafluoroethylene flange heating tubes, and commonly known as PTFE tubes. Teflon flange heating tubes are generally suitable for use in corrosive liquids such as strong acids and alkalis. Typical process temperatures are ≤105°C. Teflon flange heating tubes offer advantages such as non-sticking, anti-scaling, and uniform heat dissipation across the surface, but they are also relatively expensive.

4. Quartz Flange Heating Tubes

Quartz flange heating tubes are generally suitable for use in corrosive liquids, with the exception of hydrofluoric acid.

It is worth noting that, based on practical experience, the order of material selection, from weak to strong acidity and alkalinity, is generally: stainless steel 304 flange heating tubes, stainless steel 316 flange heating tubes, Teflon flange heating tubes, and titanium flange heating tubes. Prices also increase in this order.