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 Rods from China Suppliers - Fused Silica Rods for Semiconductor & Laboratory Applications Factory Factories, Factory

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Custom High Purity Quartz Rods from China Suppliers - Fused Silica Rods for Semiconductor & Laboratory Applications Factory Factories, Factory

Our quartz rods, manufactured from high-purity fused silica (SiO₂ ≥ 99.99%), are high-performance cylindrical products favored in various applications. With exceptional high-temperature resistance (softening point ~1730°C and long-term usability at 1100°C), these rods excel in UV-IR transmittance, low thermal expansion, and remarkable chemical inertness, resisting most acids except HF. They also provide outstanding electrical insulation. As leading suppliers in China, we offer quartz rods widely utilized in optics, semiconductors, lasers, lab instruments, and high-temperature equipment, making them essential for precision and harsh-environment applications.

Our quartz rods are expertly crafted by melting natural or synthetic quartz, resulting in high-purity silicon dioxide (SiO₂) cylindrical components. Produced through advanced drawing or molding processes at our factory, these rods serve as essential semi-finished materials for further fabrication into tubes, supports, or optical components.

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Product Description

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 cross-sectional dimensions are available?

Available cross-sectional dimensions range from 3×3 mm up to 20×20 mm, including sizes 3×3, 4×4, 5×5, 6×6, 8×8, 10×10, 15×15, and 20×20.

Q What are the standard length ranges offered?

Most sizes support standard lengths from 100 mm to 1000 mm. Larger sizes such as 15×15 and 20×20 are available in lengths from 100 mm to 500 mm.

Q What tolerance applies to smaller dimensions like 3×3 to 5×5?

Dimensions 3×3, 4×4, and 5×5 all carry a tight tolerance of ±0.1 mm, making them suitable for precision applications.

Q How does tolerance change as the dimensions increase?

Tolerances increase gradually with size: ±0.1 mm for 3×3 to 5×5, ±0.15 mm for 6×6 and 8×8, ±0.2 mm for 10×10 and 15×15, and ±0.25 mm for 20×20.

Q Why are the maximum standard lengths shorter for larger sizes?

Larger cross-sectional sizes such as 15×15 and 20×20 have a maximum standard length of 500 mm, likely due to material weight, handling constraints, and manufacturing process limitations.

Q Can custom lengths or dimensions be ordered outside the standard specifications?

The table reflects standard available specifications. For custom cross-sectional dimensions or lengths outside the listed ranges, it is recommended to contact the supplier directly to discuss custom manufacturing options.

Custom High Purity Quartz Rods from China Suppliers - Fused Silica Rods for Semiconductor & Laboratory Applications Factory Factories, Factory

Product Description

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