The "blood vessels" of modern industrial business equipment - graphite tube

    Inside precision equipment such as high-temperature vacuum furnaces, semiconductor devices, and aerospace vehicles, there lies a seemingly simple yet crucial component - graphite tubes. It is like the "blood vessels" of the equipment, transporting heat and process gases in extreme environments, silently supporting the smooth progress of numerous high-end manufacturing processes.

    1.Extraordinary performance determines industrial value

    High-temperature resistance property

   In an inert atmosphere, graphite tubes can stably operate in an environment above 3000℃, and even in the air, they can withstand a temperature of 400℃, far exceeding the service limit of most metal materials.

    Outstanding thermal conductivity

    The thermal conductivity of graphite tubes can reach over 150 W/m·K, comparable to that of aluminum alloy, making them an ideal choice for high-efficiency heat exchangers.

    Excellent thermal shock resistance

    Graphite tubes can withstand sudden temperature changes without cracking, and they will not crack even after being cooled from 1000℃ to room temperature and reheated.

    Chemical stability

The acid and alkali corrosion resistance of graphite tubes enables them to work stably for a long time in harsh chemical environments and have a long service life.

   It has good machinability

    Graphite tubes can be mechanically processed by turning, milling, drilling, etc., and are convenient for connection and assembly with other components.

    2.Three core application fields

    Core components of high-temperature vacuum furnaces

    In high-temperature vacuum furnaces, graphite tubes are used not only as heating elements but also as heat insulation screens and supporting components. Its high-temperature stability and low volatile matter characteristics ensure the purity and stability of the process environment inside the furnace.

   Semiconductor process equipment

    In the semiconductor manufacturing process, graphite tubes are widely used in key equipment such as diffusion furnaces and CVD devices, serving as pipelines for transporting process gases and components of reaction chambers. Their high purity and low pollution characteristics ensure the quality of chip manufacturing.

    Chemical heat exchange equipment

    Graphite tube heat exchangers have become the preferred equipment for heat exchange of corrosive media in the chemical industry. Its excellent corrosion resistance and thermal conductivity make it irreplaceable in heat exchange applications with strong corrosive media such as hydrochloric acid and sulfuric acid.

     3. Analysis of professional technical parameters

    When choosing graphite tubes, the following key indicators need to be paid attention to

    Specification and dimensions: Inner diameter, outer diameter, length and tolerance range

    Bulk density: Usually 1.6-1.9 g/cm³, it affects strength and thermal conductivity

    Compressive strength: It determines its pressure-bearing capacity and service life

    Resistivity: A key electrical performance index

    Ash content: It directly affects the purity of the material and the applicable scenarios

   Coefficient of thermal expansion: It is related to its dimensional stability when the temperature changes

    4. Key points for Use and Maintenance

    Correct installation

    When installing, avoid hard knocking and pounding. Use special tools to ensure uniform force distribution

    Temperature rise specification

    Follow the principle of gradual temperature increase to avoid thermal stress damage caused by sudden temperature changes

    Atmosphere control

    When used in an oxidizing atmosphere, protective measures should be taken or anti-oxidation graphite tubes should be selected

    Regular inspection

    Regularly inspect the surface condition and dimensional changes of the pipelines, and promptly identify and replace aged components

    With the advancement of new material technology, new products such as isotropic graphite tubes, high-purity graphite tubes, and composite coated graphite tubes are constantly emerging. In high-end fields such as aerospace, nuclear industry, and new energy, the application of graphite tubes is constantly expanding and deepening. The seemingly ordinary graphite tube is actually an indispensable key component in modern industry. From chip manufacturing to aerospace materials, from chemical production to new energy development, this tiny tube is playing an irreplaceable role. When choosing and using graphite tubes, the specific working conditions should be taken into account, and various performance indicators should be comprehensively considered to select the most suitable product specifications and materials.