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China Suppliers of Oversized Fused Quartz Tubes for High-Temperature Applications - Factory Direct

Our large-diameter quartz tubes, manufactured at our factory in China, are crafted from high-purity quartz material, achieving impressive diameters of up to one meter. Renowned for their exceptional temperature and corrosion resistance, these quartz tubes offer superior light transmittance, making them ideal for high-temperature furnaces. They play a crucial role in large-scale production processes across diverse industries, including photovoltaics, semiconductors, and metallurgy. As trusted suppliers, we provide essential components for large-scale heat treatment equipment, ensuring reliability and performance in demanding applications.

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

📐 All dimensions are in millimeters (mm). Tolerances listed are standard ranges and may vary based on material grade and production method.

Outer Diameter (mm)	Outer Diameter Tolerance (mm)	Standard Wall Thickness (mm)	Wall Thickness Tolerance (mm)	Standard Length (mm)
200	±2.0～±3.0	6～12	±0.8～±1.2	1000～2000
250	±2.5～±3.5	8～14	±1.0～±1.5	1000～2000
300	±3.0～±4.0	8～16	±1.0～±1.5	1000～2000
350	±3.5～±4.5	10～18	±1.2～±1.8	1000～2000
400	±4.0～±5.0	10～20	±1.2～±2.0	1000～2000
450	±4.5～±5.5	12～22	±1.5～±2.0	1000～2000
500	±5.0～±6.0	12～25	±1.5～±2.5	1000～2000
600	±6.0～±8.0	15～28	±2.0～±3.0	1000～2000
700	±7.0～±9.0	18～32	±2.0～±3.0	1000～1800
800	±8.0～±10.0	20～35	±2.5～±3.5	1000～1800
900	±10.0～±12.0	22～40	±3.0～±4.0	1000～1500
1000	±12.0～±15.0	25～45	±3.0～±5.0	1000～1500

❓ Frequently Asked Questions

Q What does the outer diameter tolerance mean in this specification table?

A The outer diameter tolerance indicates the allowable deviation from the nominal outer diameter during manufacturing. For example, a pipe with an outer diameter of 200mm and a tolerance of ±2.0～±3.0mm means the actual diameter may range from 197mm to 203mm, depending on the specific tolerance applied.

Q Why does the standard length decrease for larger diameter pipes?

A Larger diameter pipes (700mm and above) are heavier and more difficult to handle, transport, and install. Reducing the standard length helps manage weight, minimize structural stress during transit, and ensure safer on-site handling. Pipes with OD ≥ 900mm are limited to 1000～1500mm lengths for this reason.

Q Can wall thickness be customized outside the listed standard range?

A Yes, custom wall thicknesses beyond the listed standard range are typically available upon request. Custom specifications may be required for high-pressure applications, extreme temperature environments, or specific structural requirements. Please consult with the manufacturer for custom orders.

Q How do I select the correct wall thickness for my application?

A Wall thickness selection depends on several factors including operating pressure, fluid type, temperature, and applicable industry standards. Thicker walls provide greater strength and pressure resistance. It is recommended to consult engineering guidelines or a qualified engineer to determine the appropriate wall thickness for your specific use case.

Q What standards are these pipe dimensions based on?

A These pipe dimensions and tolerances are generally aligned with common international manufacturing standards such as ISO, ASTM, or DIN, depending on the material and application. The specific standard applicable to your order should be confirmed with the supplier at the time of purchase.

Q Are tolerances the same across all pipe sizes in the table?

A No, tolerances increase proportionally with pipe size. Larger diameter pipes have wider tolerance ranges for both outer diameter and wall thickness. This is standard practice in pipe manufacturing, as maintaining tight tolerances becomes more challenging at larger scales. Always refer to the specific row in the table for accurate tolerance data for your required size.

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.