Introduce

Quartz flanges are precision-engineered components made from high-purity fused quartz. They are widely used for connecting, sealing, supporting, and positioning quartz tubes, chambers, reactors, and vacuum equipment.

Thanks to their excellent thermal stability, low coefficient of thermal expansion, high chemical resistance, and electrical insulation properties, quartz flanges are suitable for demanding applications in the semiconductor, photovoltaic, laboratory, vacuum, optical, and high-temperature processing industries.

We provide custom quartz flange manufacturing based on customer drawings, samples, dimensions, and application requirements.

Product Features

High-Purity Fused Quartz

Our quartz flanges are manufactured from high-quality fused quartz with low impurity content. This makes them suitable for applications requiring high cleanliness and material stability.

Excellent Heat Resistance

Quartz flanges can maintain good structural stability under high-temperature conditions. They are commonly used in oxidation, diffusion, annealing, deposition, and thermal processing systems.

Low Thermal Expansion

Fused quartz has an extremely low coefficient of thermal expansion. This helps reduce dimensional changes, thermal deformation, and stress caused by rapid temperature variations.

Strong Chemical Resistance

Quartz has excellent resistance to most acids and many corrosive chemicals, making quartz flanges suitable for chemical processing and high-purity gas systems.

Good Electrical Insulation

Quartz provides excellent dielectric properties and electrical insulation, making it suitable for electronic, semiconductor, and high-voltage equipment.

Precision Machining

Outer diameters, inner diameters, bolt holes, locating holes, sealing grooves, steps, and special structures can be machined according to customer drawings.

Quartz Welding Capability

Quartz flanges can be welded to quartz tubes, quartz chambers, quartz reactors, and other quartz components to create complete assemblies.

Applications

Quartz flanges are commonly used in:

• Semiconductor diffusion and oxidation furnaces
• Chemical vapor deposition systems
• Photovoltaic manufacturing equipment
• Vacuum coating equipment
• High-temperature tube furnaces
• Laboratory quartz reactors
• Quartz process tubes
• High-purity gas delivery systems
• Optical and laser equipment
• Chemical processing systems
• Research and testing equipment

Customization Options

We offer custom quartz flange manufacturing services according to your technical requirements.

Available customization options include:

• Outer diameter and inner diameter
• Flange thickness
• Bolt hole quantity and diameter
• Hole spacing and hole position
• O-ring and sealing grooves
• Counterbores and locating holes
• Steps and positioning structures
• Chamfers and rounded edges
• Transparent, polished, or frosted surfaces
• Quartz tube welding
• Quartz chamber welding
• Special shapes and complex structures
• Prototype, small-batch, and volume production

Quartz Flange Manufacturing Process

1. Raw Material Inspection

High-purity fused quartz plates, tubes, or blanks are selected according to the product size, operating temperature, cleanliness requirements, and application conditions.

The raw material is inspected for dimensions, cracks, bubbles, scratches, and other visible defects.

2. Material Cutting

The quartz material is cut into a preliminary blank according to the product drawing. Additional material is reserved for subsequent precision machining.

3. Precision Machining

The outer diameter, inner bore, thickness, steps, and positioning structures are machined using professional quartz processing equipment.

Machining speed and pressure are carefully controlled to reduce chipping, microcracks, and internal stress.

4. Hole and Groove Processing

Bolt holes, locating holes, counterbores, sealing grooves, and O-ring grooves are processed according to the drawing.

For sealing applications, groove width, depth, hole spacing, and positional accuracy are carefully controlled.

5. Edge Grinding

Sharp edges and small chips are removed through grinding, chamfering, or edge rounding.

Proper edge finishing helps reduce stress concentration and lowers the risk of breakage during installation and operation.

6. Surface Finishing

Depending on the application, the quartz flange can be mechanically polished, fire-polished, or frosted.

Polishing improves surface smoothness and transparency, while frosting provides a matte surface.

7. Quartz Welding

When required, the quartz flange is welded to a quartz tube, quartz chamber, or other quartz component.

During welding, the temperature, alignment, concentricity, and welding area are carefully controlled to ensure a reliable connection.

8. Annealing

Welded or complex quartz components may be annealed to release residual internal stress.

Annealing helps reduce the risk of cracking during transportation, installation, and high-temperature use.

9. Cleaning and Drying

After machining, the quartz flange is thoroughly cleaned to remove quartz particles, dust, oil, and processing residues.

The product is then dried and protected in a clean environment.

10. Inspection and Packaging

Finished quartz flanges are inspected for:

• Outer and inner dimensions

• Thickness

• Hole diameter and position

• Groove dimensions

• Flatness

• Surface scratches

• Edge chipping

• Welding quality

• Assembly compatibility

After inspection, each product is packed with protective wrapping, cushioning materials, and shock-resistant packaging.

Frequently Asked Questions

Can quartz flanges be customized according to drawings?

Yes. We can manufacture quartz flanges according to 2D drawings, 3D models, samples, or detailed dimensional requirements.

Can quartz flanges be welded to quartz tubes?

Yes. We can weld quartz flanges to quartz tubes, chambers, reactors, and other fused quartz components.

Can you manufacture small quantities?

Yes. We support prototypes, small-batch orders, and volume production.

Can sealing grooves be machined?

Yes. O-ring grooves, sealing grooves, locating grooves, and other precision structures can be machined according to customer drawings.