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-Quality Fused Silica Quartz Plate Supplier | Heat Resistant Quartz Glass Factory in China Suppliers, Factories

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Custom High-Quality Fused Silica Quartz Plate Supplier | Heat Resistant Quartz Glass Factory in China Suppliers, Factories

Our high-purity quartz sheets, produced in China, are renowned for their exceptional qualities such as high temperature resistance, superior light transmittance, and a low coefficient of expansion. As a leading supplier and factory specializing in quartz products, we offer customizable sizes and thicknesses to meet the diverse needs of our clients. These versatile quartz plates are widely utilized in optical windows, semiconductor manufacturing processes, laboratory glassware, and other critical applications. They serve as essential components in optoelectronic devices and scientific research equipment.

Each quartz plate is expertly crafted from high-purity silicon dioxide (SiO₂), commonly referred to as fused quartz plate or quartz glass plate. Our manufacturing process involves melting natural or synthetic high-purity quartz, which is then precision cut and polished to create flat panels that meet stringent quality standards.

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Standard Dimensions & Tolerances Specifications

Length × Width (mm)	Dimensional Tolerances (mm)	Standard Thickness (mm)	Thickness Tolerances (mm)
10 × 10	±0.1	0.5 / 1.0 / 2.0	±0.05 ~ ±0.1
20 × 20	±0.1	0.5 / 1.0 / 2.0 / 3.0	±0.05 ~ ±0.1
30 × 30	±0.1	1.0 / 2.0 / 3.0	±0.05 ~ ±0.1
40 × 40	±0.1 ~ ±0.2	1.0 / 2.0 / 3.0 / 4.0	±0.08 ~ ±0.1
50 × 50	±0.1 ~ ±0.2	1.0 / 2.0 / 3.0 / 5.0	±0.08 ~ ±0.1
60 × 60	±0.2	2.0 / 3.0 / 5.0	±0.1
80 × 80	±0.2	2.0 / 3.0 / 5.0	±0.1
100 × 100	±0.2 ~ ±0.3	2.0 / 3.0 / 5.0	±0.1
150 × 150	±0.3	3.0 / 5.0	±0.1 ~ ±0.2
200 × 200	±0.3 ~ ±0.5	3.0 / 5.0	±0.1 ~ ±0.2

Frequently Asked Questions

Q What does "dimensional tolerance" mean in this specification table?

Dimensional tolerance refers to the allowable deviation from the specified length and width measurements. For example, a tolerance of ±0.1 mm means the actual dimension can be up to 0.1 mm larger or smaller than the stated size, ensuring consistent fit and performance across applications.

Q Why do larger sizes have wider dimensional tolerances?

As the length and width increase, achieving the same level of precision becomes more challenging during manufacturing. Larger pieces are subject to greater material variation, thermal expansion, and processing factors, which naturally result in slightly wider allowable tolerances such as ±0.3 ~ ±0.5 mm for 200×200 mm sizes.

Q Are custom sizes or thicknesses available beyond the listed specifications?

The table lists standard sizes and thicknesses available for regular orders. For special project requirements, custom dimensions and thickness options may be available upon request. It is recommended to contact the supplier directly to discuss feasibility, lead times, and any applicable tolerances for non-standard specifications.

Q What is the thinnest available thickness and which sizes support it?

The thinnest standard thickness available is 0.5 mm, which is supported by the smaller sizes of 10×10 mm and 20×20 mm. Thinner pieces are more suitable for precision applications where minimal material footprint is required, and they carry a tighter thickness tolerance of ±0.05 ~ ±0.1 mm.

Q How do thickness tolerances compare between small and large sizes?

Smaller sizes such as 10×10 mm to 50×50 mm typically have tighter thickness tolerances in the range of ±0.05 ~ ±0.1 mm. As dimensions increase to 150×150 mm and 200×200 mm, the thickness tolerances widen slightly to ±0.1 ~ ±0.2 mm, reflecting the increased complexity of maintaining uniform thickness across larger surface areas.

Q Which size offers the most thickness options for design flexibility?

The 40×40 mm size offers the widest range of standard thickness options — 1.0 mm, 2.0 mm, 3.0 mm, and 4.0 mm — making it a versatile choice for applications that require multiple material depth configurations within the same footprint. The 20×20 mm size also provides four thickness options: 0.5 mm, 1.0 mm, 2.0 mm, and 3.0 mm.

Custom High-Quality Fused Silica Quartz Plate Supplier | Heat Resistant Quartz Glass Factory in China Suppliers, Factories

Product Description

Product Specifications

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