How to choose the shell material of the heating tube?
How to choose electric heating tube material?
Then we have to figure out what materials and commonly used materials for the electric heating tube, so as to compare and choose with the heating medium, working environment and temperature requirements.
How many materials are there for electric heating tubes?
1.Metal: carbon steel (iron), stainless steel, titanium pipe and imported stainless steel materials, such as Ingle 840, Ingle 800, German stainless steel 321, etc.
2. Non-metallic categories: quartz glass, ceramics, PTFE sheath, silicon carbide.
What you need to know is whether the purchase of electric heating tubes focuses on corrosion resistance or high temperature heating, direct conduction heating, convection heating or radiant heating, and whether the working environment has vibration or external impact.
The shell material of the heating tube
Based on long-term experience, our factory has summarized the tube material selection for heating tubes under common conditions of heating solid, liquid and gaseous media.
Perforated insert heating for castings, molds and mechanical equipment.
1.Low temperature, the surface temperature of 304 stainless steel material is about 450℃, which can meet the needs of most mold heating.
2.Medium temperature. For example, the electric heating tube of the extrusion cylinder is made of stainless steel 321, and the surface temperature is below 700 degrees.
3.High temperature, such as high temperature cartridge electric heating tube for quenching, choose stainless steel 310S material, and the surface temperature can be 800-900℃.
Water heating
1.Non-drinking water (cleaning, heat exchange, etc.), stainless steel 304 material can fully meet the temperature and anti-rust requirements.
2.For drinking water, it is recommended to use stainless steel 316 material, because the water quality in some areas is weakly acidic, which is safe and hygienic; of course, stainless steel 304 pipe material can also be used.
Oil heating
Carbon steel and stainless steel 304 tube are used as the material for the electric heating tube of the oil barrel.
Heating of corrosive liquids
According to the specific analysis of the corrosion characteristics of the heating medium, stainless steel 304, stainless steel 316, titanium tube or Teflon material is used.
Air dry heating
1.Surface temperature of air dry heating electric heating tube: ≤450℃, tube material: stainless steel 304, stainless steel 316 and titanium tube.
2.Surface temperature of electric heating tube: ≤700℃, tube material: stainless steel 321.
3.Surface temperature of electric heating tube: 800～900℃, tube material: stainless steel 310s is also called stainless steel 2520.
