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.

Wholesale Fused Silica Quartz Plate from China - High-Temperature Resistant Supplier & Factory for Optoelectronic Applications Manufacturer, Manufacturers

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Wholesale Fused Silica Quartz Plate from China - High-Temperature Resistant Supplier & Factory for Optoelectronic Applications Manufacturer, Manufacturers

Discover high-quality quartz sheets from trusted suppliers in China. Our quartz sheets are crafted from high-purity silicon dioxide (SiO₂), offering exceptional temperature resistance, high light transmittance, and a low coefficient of expansion. These versatile sheets can be customized in size and thickness to meet your specific needs. Ideal for various applications, including optical windows, semiconductor manufacturing processes, and laboratory glassware, our quartz sheets serve as vital components in optoelectronic and scientific research equipment. Partner with a leading factory in China to access premium quartz products tailored for performance and reliability.

A quartz plate, also known as a fused quartz plate or quartz glass plate, is meticulously produced by melting natural or synthetic high-purity quartz, followed by precision cutting and polishing to create flat panels. Explore our range of quartz plates to enhance your projects with superior quality and durability.

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All dimensions are in millimeters (mm). Tolerances are standard references; custom specifications are available upon request.

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 do the dimensional tolerances in this table indicate?

A Dimensional tolerances refer to the acceptable deviation range (in millimeters) from the specified length and width measurements. For example, a tolerance of ±0.1 mm means the actual dimension can be 0.1 mm larger or smaller than the nominal size.

Q Why do larger sizes have greater dimensional tolerances?

A As the size of a piece increases, minor variations in material properties and manufacturing processes accumulate, making it more challenging to maintain tight tolerances. Larger pieces such as 150×150 mm or 200×200 mm therefore carry wider tolerance ranges compared to smaller sizes like 10×10 mm.

Q Can I request a thickness that is not listed in the Standard Thickness column?

A The standard thickness options listed represent the most commonly stocked configurations. Custom thickness values may be available depending on the material and size. Please contact us directly to discuss your specific requirements and confirm feasibility.

Q What is the difference between dimensional tolerances and thickness tolerances?

A Dimensional tolerances apply to the length and width (the flat face dimensions) of the piece, while thickness tolerances refer to the allowable deviation in the depth or height measurement. These two parameters are controlled separately during the manufacturing process.

Q Are these tolerance values compliant with any international standards?

A The tolerance values listed are based on standard manufacturing practices and are consistent with commonly referenced precision machining guidelines. If your application requires compliance with a specific standard such as ISO, DIN, or ASTM, please inform us so we can verify or adjust accordingly.

Q Which size offers the most thickness options?

A The 40×40 mm size offers the widest range of standard thickness options, available in 1.0, 2.0, 3.0, and 4.0 mm. The 20×20 mm size also provides four options (0.5, 1.0, 2.0, and 3.0 mm), making both sizes highly versatile for various application needs.

Wholesale Fused Silica Quartz Plate from China - High-Temperature Resistant Supplier & Factory for Optoelectronic Applications Manufacturer, Manufacturers

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