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 Custom Transparent Quartz Glass Ring High Temperature Resistant Insulation Ring Manufacturer, Suppliers

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Wholesale Custom Transparent Quartz Glass Ring High Temperature Resistant Insulation Ring Manufacturer, Suppliers

Quartz rings are high-purity components made from fused silica, featuring excellent thermal stability, high-temperature resistance up to 1100°C, and low thermal expansion. They exhibit outstanding light transmittance, strong acid and corrosion resistance, as well as superior electrical insulation. With high dimensional accuracy and good mechanical strength, they are widely used in semiconductor manufacturing, high-temperature furnaces, optical devices, laboratory equipment, and photovoltaic industries, serving as sealing rings, insulation parts, and structural components in harsh environments.

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Product Description

Product Specification

Key Specifications

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

What size ranges are available for this product?

The product is available in outer diameters ranging from 20mm up to 300mm, with various inner diameter options and heights from 5mm up to 150mm depending on the outer diameter selection.

How are dimensional tolerances managed?

Tolerances are strictly controlled according to size specifications. Smaller dimensions carry precision tolerances as tight as ±0.2mm, while larger units scale up to ±1.5mm to match standard manufacturing practices.

Can custom heights within the listed ranges be requested?

Yes, heights can be selected within the minimum and maximum ranges listed for each outer diameter category to meet specific engineering criteria.

Are there multiple inner diameter configurations per outer diameter?

Yes, most outer diameter sizes offer multiple inner diameter configurations (e.g., OD 80mm supports ID options of 50mm, 60mm, and 70mm) to accommodate different application requirements.

What are the unit measurements used in the specification table?

All dimensional values, including outer diameter, inner diameter, height, and corresponding tolerances, are specified in millimeters (mm).

Wholesale Custom Transparent Quartz Glass Ring High Temperature Resistant Insulation Ring Manufacturer, Suppliers

Product Description

Product Specification

Frequently Asked Questions

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