Hot Products

Oversized Fused Quartz Tube for High-Temp Applications – High-Purity China Factory & Suppliers

Large-diameter quartz tubes, manufactured in China, are crafted from high-purity quartz material and can reach impressive diameters of up to one meter. These tubes exhibit exceptional temperature and corrosion resistance, along with outstanding light transmittance, making them ideal for use in large high-temperature furnaces. As key components in large-scale heat treatment equipment, our quartz tubes are essential for industries such as photovoltaics, semiconductors, and metallurgy. As a leading factory and supplier, we are committed to providing the highest quality products to support large-scale production needs

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

⬅ Scroll horizontally to view full table ➡

⌀ Outer Diameter (mm)	📐 OD 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 (OD) tolerance mean in this specification table?

The outer diameter tolerance indicates the permissible deviation from the nominal outer diameter during manufacturing. For example, a pipe with an OD of 200mm may have an actual OD that varies by ±2.0 to ±3.0mm. This range ensures the pipe fits properly within standard connection systems while accounting for manufacturing variability.

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

Larger diameter pipes (700mm and above) have shorter standard lengths (1000–1800mm or 1000–1500mm) primarily due to their increased weight and structural considerations. Longer sections of large-diameter pipe become extremely heavy, making transportation, handling, and installation more difficult and potentially unsafe.

Q Can pipes be manufactured outside the listed standard wall thickness ranges?

The standard wall thickness ranges listed represent the most commonly produced and stocked dimensions. Custom wall thicknesses outside these ranges may be available upon special request, depending on the specific application requirements, load-bearing needs, or project engineering specifications. Please contact the manufacturer directly for custom orders.

Q How should I select the appropriate wall thickness for my application?

Wall thickness selection depends on several factors including operating pressure, fluid type, soil conditions (for buried pipes), temperature ranges, and applicable industry standards. As a general rule, higher pressure applications and larger diameters require greater wall thickness. We recommend consulting with a qualified engineer to determine the optimal wall thickness for your specific use case.

Q What international standards do these pipe dimensions conform to?

These pipe specifications are generally aligned with widely recognized international standards such as ISO, ASTM, DIN, and EN series standards for large-diameter pipes. The specific standard applicable to your order may vary based on material type and end-use industry. Please request the relevant certification documentation when placing your order.

Q Are custom lengths available beyond the listed standard length ranges?

Yes, custom lengths may be available depending on the pipe diameter and material. The standard length ranges shown in the table (1000–2000mm) represent the typical production runs. For project-specific requirements that fall outside these ranges, please reach out to discuss feasibility, lead times, and any additional costs that may apply.

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.