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.

High-Quality High Purity Quartz Rod / Fused Silica Rod - China Supplier & Factory for Semiconductors and Laboratory Use Manufacturers, Products

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High-Quality High Purity Quartz Rod / Fused Silica Rod - China Supplier & Factory for Semiconductors and Laboratory Use Manufacturers, Products

Quartz rods are high-performance cylindrical components crafted from fused silica (SiO₂ ≥ 99.99%), renowned for their exceptional high-temperature resistance, with a softening point of approximately 1730°C and a long-term usability at 1100°C. These rods boast excellent UV-IR transmittance, low thermal expansion, and remarkable chemical inertness, making them resistant to most acids, except HF. Additionally, they provide outstanding electrical insulation properties. Perfect for applications in optics, semiconductors, lasers, laboratory instruments, and high-temperature equipment, quartz rods are essential materials for precision manufacturing and harsh-environment scenarios. As a leading supplier and factory in China, we ensure premium quality quartz rods to meet diverse industrial needs.

Produced through the melting of natural or synthetic quartz and formed into solid cylindrical rods via drawing or molding processes, our quartz rods are ideal semi-finished materials that can be further fabricated 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

What cross-sectional dimensions are available in this specification table?

The table covers eight standard cross-sectional sizes ranging from 3×3 mm up to 20×20 mm, including 3×3, 4×4, 5×5, 6×6, 8×8, 10×10, 15×15, and 20×20.

What are the tolerance values for smaller cross-sectional sizes such as 3×3 to 5×5?

For smaller sizes including 3×3, 4×4, and 5×5, the dimensional tolerance is ±0.1 mm, ensuring a high level of precision for fine applications.

Do tolerances increase as the cross-sectional size gets larger?

Yes. Tolerances gradually increase with size. Sizes 6×6 and 8×8 carry a tolerance of ±0.15 mm, sizes 10×10 and 15×15 have ±0.2 mm, and the largest size 20×20 has a tolerance of ±0.25 mm.

What standard lengths are available for sizes up to 10×10?

Cross-sectional sizes from 3×3 through 10×10 are available in standard lengths ranging from 100 mm to 1000 mm, providing flexible options for various applications.

Are the standard lengths different for larger sizes like 15×15 and 20×20?

Yes. For larger cross-sectional sizes of 15×15 and 20×20, the standard length range is reduced to 100–500 mm, compared to the 100–1000 mm range available for smaller sizes.

Can custom lengths or tolerances be requested outside of these standard specifications?

The table reflects standard production specifications. For requirements outside these listed dimensions, tolerances, or lengths, it is recommended to contact the supplier directly to discuss custom manufacturing options.

High-Quality High Purity Quartz Rod / Fused Silica Rod - China Supplier & Factory for Semiconductors and Laboratory Use Manufacturers, Products

Product Description

Product Specifications

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