High-Purity Graphite Tubes for Industrial Furnace, Continuous Casting & Heat Exchanger

▍Product Description

Our factory specializes in the production of high-purity industrial graphite tubes, manufactured using proven extrusion and high-temperature graphitization processes. These tubes feature a uniform and dense structure, with stable and reliable physical and chemical properties. We offer full-range customization based on customers’ on-site equipment conditions, installation dimensions, and operating temperatures, supporting both standard stock and custom-made orders. Designed specifically for harsh high-temperature industrial environments, these graphite tubes overcome the limitations of ordinary carbon steel tubes. With their exceptional heat resistance, high thermal conductivity, thermal shock resistance, and corrosion resistance, they are widely used in core industrial sectors such as industrial furnaces, vacuum heat treatment equipment, thermal exchange systems, and non-ferrous metal continuous casting. They serve as superior, wear- and heat-resistant components that effectively replace metal tubing in high-temperature applications.

Precision Machined High-Purity Graphite Tubes

Multi-Size Graphite Sleeves & Short Tubes

▍Key Product Advantages

• Excellent Thermal Shock Resistance: With a low coefficient of thermal expansion and good thermal conductivity, these tubes can withstand extreme temperature fluctuations without cracking, making them particularly suitable for industrial furnaces that undergo frequent temperature cycling.

• High Purity and Uniform Structure: Formed using an isostatic pressing process, the material features a dense and uniform internal structure with high purity (carbon content >99.9%). This ensures that the material does not react with molten metal at high temperatures, thereby maintaining product purity.

• Excellent Machinability: Compared to brittle materials such as silicon carbide (SiC), graphite tubes are easier to machine through processes like turning, milling, and drilling, enabling complex custom designs.

• High Cost-Effectiveness: While meeting the demands of harsh operating conditions, the overall cost is lower than that of many high-end refractory materials, making it a cost-effective choice.

▍Structural Features

Note: Supports special-shaped machining such as threads (M10–M50), flanges, steps, and tapered surfaces, with a precision of ±0.05 mm.

▍Precautions for Use

• Control Surface Temperature: Although the material has extremely high temperature resistance, excessively high surface temperatures can accelerate material wear. It is recommended to control the operating temperature appropriately while meeting process requirements to extend service life.

• Avoid Rapid Heating: When graphite tubes are newly installed in equipment, heat them up gradually to avoid sudden, rapid temperature increases, thereby reducing structural damage caused by thermal stress.

• Voltage Adjustment: When used as a heating element, the resistance value will increase slightly over time. Therefore, allow for sufficient voltage adjustment margin.

• Regular Inspection: If fine cracks appear on the surface of the graphite tube, replace it promptly to prevent disruption to the normal operation of the entire system.

Continuous Metal Casting

Vacuum Heat Treatment

Optical Fiber Drawing

▍FAQ

• Q1: What are the advantages of graphite tubes compared to silicon carbide (SiC) heating tubes?

  A1: Graphite tubes offer superior thermal shock resistance and can withstand more extreme temperature fluctuations. Additionally, graphite is easier to machine, making it simpler to fabricate into complex shapes, and it also offers certain cost advantages.

• Q2: Do you offer customization based on customer-provided drawings or samples?

  A2: Absolutely. We can customize products according to customer-provided drawings and technical specifications, including outer diameter, inner diameter, length, and tolerances.

• Q3: What is the maximum length for high-temperature graphite tubes?

  A3: We carry a full range of standard stock lengths. We can also custom-manufacture extra-long, one-piece graphite tubes to meet the installation requirements of large-scale industrial equipment.

• Q4: In which fields are graphite tubes primarily used?

  A4: They are primarily used in vacuum furnace heating elements, continuous casting of non-ferrous metals (such as copper and aluminum), high-temperature heat exchangers, and industries such as semiconductor and quartz glass manufacturing.