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 High-Purity Oversized Fused Quartz Tube Suppliers in China - Ideal for High-Temperature Applications from Factory Factory, Product

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Wholesale High-Purity Oversized Fused Quartz Tube Suppliers in China - Ideal for High-Temperature Applications from Factory Factory, Product

Introducing our high-purity quartz tubes, crafted from premium materials and available in large diameters, with sizes reaching up to one meter. Our quartz tubes are designed to withstand high temperatures and resist corrosion, offering outstanding light transmittance. Ideal for large high-temperature furnaces, these tubes are essential components in industries such as photovoltaics, semiconductors, and metallurgy. As a leading factory and supplier in China, we provide high-quality quartz solutions for large-scale heat treatment equipment, ensuring optimal performance and reliability for your manufacturing needs

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Product Description

Product Specifications

Outer Diameter	Outer Diameter Tolerance	Standard Wall Thickness	Wall Thickness Tolerance	Standard Length
200	±2.0～±3.0	6～12	±0.8～±1.2	1000～2000
250	±2.5～±3.5	8～14	±1.0～±1.5	1000～2000
300	±3.0～±4.0	8～16	±1.0～±1.5	1000～2000
350	±3.5～±4.5	10～18	±1.2～±1.8	1000～2000
400	±4.0～±5.0	10～20	±1.2～±2.0	1000～2000
450	±4.5～±5.5	12～22	±1.5～±2.0	1000～2000
500	±5.0～±6.0	12～25	±1.5～±2.5	1000～2000
600	±6.0～±8.0	15～28	±2.0～±3.0	1000～2000
700	±7.0～±9.0	18～32	±2.0～±3.0	1000～1800
800	±8.0～±10.0	20～35	±2.5～±3.5	1000～1800
900	±10.0～±12.0	22～40	±3.0～±4.0	1000～1500
1000	±12.0～±15.0	25～45	±3.0～±5.0	1000～1500

Frequently Asked Questions

What is the range of Outer Diameters available in this specification?

The available outer diameters range from 200 mm to 1000 mm, accommodating various industrial requirements with corresponding standard wall thicknesses.

What is the standard length for these specifications?

The standard length generally ranges from 1000 mm to 2000 mm for outer diameters up to 600 mm. For larger sizes like 700 mm to 800 mm, the length is 1000 mm to 1800 mm, and for 900 mm to 1000 mm diameters, the standard length is 1000 mm to 1500 mm.

How does the wall thickness tolerance vary with size?

The wall thickness tolerance scales with the size of the diameter, starting from ±0.8～±1.2 mm for the 200 mm diameter and increasing up to ±3.0～±5.0 mm for the 1000 mm outer diameter.

What is the standard wall thickness for a 500 mm Outer Diameter?

For an outer diameter of 500 mm, the standard wall thickness is 12 mm to 25 mm, with a wall thickness tolerance of ±1.5～±2.5 mm.

What is the maximum Outer Diameter tolerance allowed?

The maximum outer diameter tolerance is ±12.0～±15.0 mm, which applies to the largest standard outer diameter size of 1000 mm.

Wholesale High-Purity Oversized Fused Quartz Tube Suppliers in China - Ideal for High-Temperature Applications from Factory Factory, Product

Product Description

Product Specifications

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