What information do you need to engineer a custom quartz tube or component?

Please send outer and inner diameter (or wall thickness), length, required tolerances, end configuration (open, closed, flanged, ground joint or welded fittings), material grade (transparent or opaque fused quartz), working temperature and atmosphere, annual or batch quantity, and a drawing in PDF, DWG or STEP format. Complete data lets our engineers confirm manufacturability and lead time in a single review.

What is the maximum operating temperature of fused quartz?

Transparent fused quartz typically supports continuous service around 1,100 °C and short exposures up to roughly 1,250 °C, with a softening point near 1,683 °C. Real limits depend on grade, load, atmosphere and cycle time. Above about 1,100 °C, surface contamination such as alkali residue from skin contact accelerates devitrification, so quartzware should be cleaned and handled with clean gloves before firing.

How does Southeast Quartz verify quality before shipment?

Products undergo helium mass-spectrometry leak detection, pressure resistance testing and purity testing before leaving the factory, together with dimensional inspection against the customer drawing, to ensure stable performance with no impurities and no leakage.

Can you manufacture oversized quartz tubes and non-standard quartz shapes?

Yes. Our workshop combines flame hot-working with CNC cold machining, so we produce oversized fused quartz tubes, bell jars, slotted quartz boats, flanged reactors, irregular shaped quartz sheets and fully customized quartz instruments according to customer equipment parameters.

Where is Southeast Quartz located and which markets do you export to?

Our factory is at No. 1 Qingsheng Rd., Qinghu Industrial Park, Donghai County, Jiangsu, China, within China's best-known crystal and quartz industrial cluster. Besides customers throughout China, we export to Europe, the Americas, Southeast Asia and the Middle East.

Custom High Purity Quartz Rod / Fused Silica Rod for Semiconductor & Laboratory - Trusted China Suppliers & Factory Suppliers, Factory

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Custom High Purity Quartz Rod / Fused Silica Rod for Semiconductor & Laboratory - Trusted China Suppliers & Factory Suppliers, Factory

A quartz rod is a high-performance cylindrical product made from high-purity fused silica (SiO₂ ≥ 99.99%), suitable for various applications across different industries. With exceptional high-temperature resistance, it features a softening point of approximately 1730°C and maintains long-term usability at temperatures up to 1100°C. This product provides excellent UV-IR transmittance, low thermal expansion, and remarkable chemical inertness, making it resistant to most acids, except HF. Additionally, quartz rods deliver outstanding electrical insulation properties, making them essential for precision and harsh-environment applications.

Manufactured in China, these quartz rods are produced by melting natural or synthetic quartz and subsequently forming them into solid cylindrical shapes through advanced drawing or molding techniques. As a trusted supplier and factory of high-quality quartz rods, we ensure that our products meet the highest standards for optics, semiconductors, lasers, laboratory instruments, and high-temperature equipment.

These quartz rods serve as essential semi-finished materials, perfect for further fabrication into tubes, supports, or optical components, catering to the diverse needs of industries worldwide.

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Product Details

⚙️ Product Specifications

📐Cross-sectional Dimensions	⚖️Tolerances	📏Standard Lengths
3×3	±0.1	100–1000
4×4	±0.1	100–1000
5×5	±0.1	100–1000
6×6	±0.15	100–1000
8×8	±0.15	100–1000
10×10	±0.2	100–1000
15×15	±0.2	100–500
20×20	±0.25	100–500

❓ Frequently Asked Questions

Q What do the cross-sectional dimensions in the table refer to?

The cross-sectional dimensions (e.g., 3×3, 5×5) refer to the width and height measurements of the material's cross-section, expressed in millimeters. These values define the size profile of each product variant.

Q What does the tolerance value mean, and why does it vary by size?

Tolerance indicates the allowable deviation (±mm) from the specified dimension during manufacturing. Larger cross-sections typically have slightly wider tolerances due to the increased complexity and material behavior at greater sizes.

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

The table lists standard length ranges for each dimension. For custom lengths outside these ranges, please contact our sales team directly to discuss feasibility and lead times for special orders.

Q Why do the 15×15 and 20×20 sizes have a shorter maximum standard length (up to 500)?

Larger cross-sectional sizes such as 15×15 and 20×20 are limited to a maximum standard length of 500 due to material handling constraints, weight considerations, and manufacturing process requirements that ensure consistent quality.

Q How should I select the right cross-sectional dimension for my application?

Selection depends on your application's load requirements, space constraints, and fit specifications. Smaller dimensions (3×3 to 6×6) suit precision or lightweight applications, while larger sizes (10×10 to 20×20) are better for structural or heavy-duty uses.

Q Are all dimensions listed in stock, or do some require lead time?

Common sizes such as 5×5 and 10×10 are typically available from stock. Less common or larger dimensions may require a production lead time. We recommend confirming availability with our team before placing time-sensitive orders.

Custom High Purity Quartz Rod / Fused Silica Rod for Semiconductor & Laboratory - Trusted China Suppliers & Factory Suppliers, Factory

Product Description

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