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High-Temperature Resistant Quartz Glass Ring - China Suppliers & Factory for Insulation and Sealing Applications

Quartz rings are high-purity components manufactured from fused silica, renowned for their exceptional thermal stability and high-temperature resistance of up to 1100°C. With their low thermal expansion and outstanding light transmittance, these rings offer robust acid and corrosion resistance, alongside superior electrical insulation. Our quartz rings are produced at our state-of-the-art factory in China, ensuring high dimensional accuracy and excellent mechanical strength. As trusted suppliers in the industry, we cater to a diverse range of applications, including semiconductor manufacturing, high-temperature furnaces, optical devices, laboratory equipment, and photovoltaic industries. They serve critical roles as sealing rings, insulation parts, and structural components designed for harsh environments

Product Description

Material & Quality

Made from 99.99% high-purity fused silica, our large-diameter quartz tube is free of impurities, ensuring minimal thermal expansion and maximum resistance to thermal shock (can withstand rapid temperature changes from -20℃ to 1200℃). It is non-toxic, non-porous, and resistant to most acids (except hydrofluoric acid) and alkaline solutions, making it suitable for corrosive chemical processing.

Core Advantages

Superior thermal stability: Operates continuously at 1100℃, short-term use up to 1450℃
Excellent mechanical strength: High compressive strength and impact resistance, cracking during installation and use
Customization support: Cut-to-length, flanged ends, and drilled holes available per customer drawings
Long service life: Resists aging and oxidation even under prolonged high-temperature exposure

Key Application Fields of Large-Diameter Quartz Tubes

Large-diameter quartz tubes are essential components in various high-end industries, thanks to their excellent thermal stability, chemical inertness and high light transmittance.

Semiconductor Industry

They are widely used in diffusion furnaces, oxidation furnaces and ion implantation equipment for wafer processing. The high purity and corrosion resistance of quartz tubes can ensure no pollution to semiconductor materials during high-temperature processes.
Solar Energy Sector

Applied to the production line of photovoltaic cells and silicon wafers, they serve as the core components of high-temperature sintering and coating equipment, helping to improve the conversion efficiency of solar cells.
High-Temperature Heat Treatment & Metallurgy

Used as furnace linings and heating chambers in annealing furnaces, quenching furnaces and sintering furnaces, they can withstand continuous high-temperature operation up to 1100℃ and resist thermal shock.
Laboratory & Scientific Research

Employed in high-temperature chemical reactors, vacuum tubes and chemical vapor deposition (CVD) systems, suitable for harsh experimental environments such as strong acid corrosion and high-temperature pyrolysis.
Optical Fiber & Optoelectronics Industry

Serve as protective sleeves and drawing molds in optical fiber preform production, ensuring the purity and uniformity of optical fiber materials during the high-temperature drawing process.
Environmental Protection & Waste Treatment

Used in high-temperature waste gas incinerators and hazardous waste treatment equipment, taking advantage of their high-temperature resistance and chemical stability to decompose harmful substances.

Product Specifications

Product Details

📐 Standard Dimensions & Tolerances (Unit: mm)

⬤ Outer Diameter	○ Inner Diameter	↕ Height	Outer Dia. Tolerance	Inner Dia. Tolerance	Height Tolerance
20	10	5～20	±0.2	±0.2	±0.2
30	15/20	5～30	±0.2	±0.2	±0.2
40	20/30	5～30	±0.2	±0.2	±0.2
50	30/40	5～50	±0.3	±0.3	±0.3
60	40/50	5～50	±0.3	±0.3	±0.3
80	50/60/70	10～60	±0.3	±0.3	±0.3
100	60/80/90	10～80	±0.5	±0.5	±0.5
120	80/100	10～80	±0.5	±0.5	±0.5
150	100/120	10～100	±0.8	±0.8	±0.5
200	150/180	10～120	±1.0	±1.0	±0.8
250	200/220	10～120	±1.2	±1.2	±0.8
300	250/280	10～150	±1.5	±1.5	±1.0

❓ Frequently Asked Questions

Q What do the outer diameter and inner diameter values in the table refer to?

The outer diameter refers to the total external measurement across the widest point of the part, while the inner diameter refers to the measurement of the internal bore or hole. Both are listed in millimeters (mm) and represent the nominal target dimensions before tolerance is applied.

Q Why do tolerance values increase as the outer diameter gets larger?

Larger components are more difficult to manufacture to exact specifications due to material expansion, machining limitations, and increased complexity. As a result, tolerance ranges are proportionally wider for larger outer diameters (e.g., ±1.5 mm for Ø300 vs. ±0.2 mm for Ø20) to accommodate practical manufacturing constraints while still ensuring functional fit.

Q Can custom dimensions outside of this standard table be produced?

Yes. The table represents standard available configurations. Custom outer diameters, inner diameters, and heights beyond the listed ranges can typically be produced upon request. Please contact our technical team with your specific requirements for feasibility assessment and quotation.

Q What does the height range (e.g., 5～50) indicate?

The height range indicates the minimum and maximum height available for a given outer diameter size. For example, an outer diameter of 60 mm can be produced in heights ranging from 5 mm up to 50 mm. You can select any height within this range based on your application needs.

Q Are the tolerance values bilateral (both plus and minus)?

Yes. All tolerance values listed in the table are bilateral, meaning the actual dimension can deviate equally in both the positive (+) and negative (−) direction from the nominal value. For example, a tolerance of ±0.3 mm means the actual dimension may be up to 0.3 mm larger or smaller than specified.

Q Why are there multiple inner diameter options for a single outer diameter?

Multiple inner diameter options for a given outer diameter (e.g., Ø80 outer with 50/60/70 inner) allow for flexibility in wall thickness to suit different load-bearing, weight, or fitment requirements. This gives engineers and designers the ability to select the most appropriate configuration for their specific application without requiring fully custom tooling.

Packaging and Shipping

Why Choose Southeast Quartz?

Southeast Quartz relies on the superior high-quality quartz ore resources in Donghai County, deeply engages in the deep processing of quartz glass, and has become a core supplier to global customers. All products undergo multiple tests such as helium mass spectrometry leak detection, pressure resistance test, and purity test before leaving the factory to ensure stable performance, no impurities, and no leakage.