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 Custom High-Temperature Resistant Quartz Glass Rings from China Suppliers - Insulation Components from Factory Factories, Factory

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Custom Custom High-Temperature Resistant Quartz Glass Rings from China Suppliers - Insulation Components from Factory Factories, Factory

Introducing our high-purity quartz rings, sourced from top-quality fused silica, proudly manufactured by leading suppliers and factories in China. These premium components offer exceptional thermal stability and can withstand temperatures up to 1100°C, making them ideal for demanding applications. Our quartz rings feature low thermal expansion, outstanding light transmittance, and remarkable resistance to acids and corrosion, ensuring durability and reliability. With superior electrical insulation and high dimensional accuracy, these quartz rings are essential in various industries, including semiconductor manufacturing, high-temperature furnaces, optical devices, laboratory equipment, and photovoltaic sectors. They function effectively as sealing rings, insulation parts, and structural components in the most challenging environments.

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Product Description

Product Specifications

📐 All dimensions are in millimeters (mm). Tolerances are specified for outer diameter, inner diameter, and height respectively.

Outer diameter	Inner diameter	Height	Outer diameter tolerance	Inner diameter tolerance	Height tolerance
20	10	5～20	±0.2	±0.2	±0.2
30	15/20	5～30	±0.2	±0.2	±0.2
40	20/30	5～30	±0.2	±0.2	±0.2
50	30/40	5～50	±0.3	±0.3	±0.3
60	40/50	5～50	±0.3	±0.3	±0.3
80	50/60/70	10～60	±0.3	±0.3	±0.3
100	60/80/90	10～80	±0.5	±0.5	±0.5
120	80/100	10～80	±0.5	±0.5	±0.5
150	100/120	10～100	±0.8	±0.8	±0.5
200	150/180	10～120	±1.0	±1.0	±0.8
250	200/220	10～120	±1.2	±1.2	±0.8
300	250/280	10～150	±1.5	±1.5	±1.0

❓ Frequently Asked Questions

Q What do the outer diameter and inner diameter values in the table represent?

A The outer diameter refers to the total external measurement of the ring or component, while the inner diameter refers to the measurement of the hollow center. Both values are listed in millimeters (mm) and define the basic dimensional specifications of each size variant.

Q Why do tolerance values increase as the outer diameter gets larger?

A Larger components naturally require wider tolerance ranges due to the increased difficulty of maintaining precision during manufacturing at greater scales. For example, a 20mm outer diameter has a tolerance of ±0.2mm, while a 300mm outer diameter allows ±1.5mm, which is still proportionally tight relative to the part size.

Q Can I request a custom inner diameter that is not listed in the table?

A Yes. The inner diameter options shown (e.g., 15/20, 20/30) represent standard configurations. Custom inner diameter specifications may be available upon request, subject to engineering review and minimum order quantity requirements. Please contact our technical team for more details.

Q What is the height range, and can intermediate heights be specified?

A The height range (e.g., 5～20mm, 10～150mm) indicates the minimum and maximum available heights for each diameter size. Intermediate heights within the listed range can generally be specified to meet your application requirements. Please consult with our team to confirm availability for your specific height.

Q Are the tolerance values the same for all dimensions at a given size?

A Not always. For most sizes, the outer diameter, inner diameter, and height share the same tolerance value. However, for larger sizes (150mm and above), the height tolerance may differ from the diameter tolerances — for example, at 150mm outer diameter, the diameter tolerance is ±0.8mm while the height tolerance is ±0.5mm.

Q What materials are these components available in?

A The dimensional specifications in this table apply across multiple material options. Available materials may include various grades of metal, plastic, or composite materials depending on the application. Please refer to the product material specifications page or contact our sales team for material-specific guice.

Custom Custom High-Temperature Resistant Quartz Glass Rings from China Suppliers - Insulation Components from Factory Factories, Factory

Product Description

Product Specifications

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