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.

High-Quality High-Temperature Oversized Fused Quartz Tube from China Suppliers - Factory Direct for Large Applications Factories, Products

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High-Quality High-Temperature Oversized Fused Quartz Tube from China Suppliers - Factory Direct for Large Applications Factories, Products

Introducing our premium large-diameter quartz tubes, expertly manufactured in China using high-purity quartz materials. With diameters ranging from several centimeters to a maximum of one meter, these tubes are designed to withstand extreme temperatures while offering exceptional corrosion resistance and light transmittance. As reliable suppliers for industries such as photovoltaics, semiconductors, and metallurgy, our quartz tubes play a crucial role in large-scale heat treatment equipment. Choose our factory for all your high-quality quartz tube needs and experience superior performance in your production processes

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← Scroll horizontally to view full table →

⌀ Outer Diameter (mm)	📐 OD Tolerance (mm)	📏 Wall Thickness (mm)	🔧 Wall Tolerance (mm)	📦 Standard Length (mm)
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

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Frequently Asked Questions

► What is the outer diameter range available for these pipes?

The pipes are available in outer diameters ranging from 200 mm to 1000 mm, covering a wide range of industrial and construction applications.

► What are the standard wall thickness options for large-diameter pipes?

For larger diameters such as 900 mm and 1000 mm, the standard wall thickness ranges from 22–40 mm and 25–45 mm respectively, providing enhanced structural strength for demanding applications.

► What is the standard length for pipes with an outer diameter of 700 mm or above?

Pipes with an outer diameter of 700 mm and 800 mm are supplied in standard lengths of 1000–1800 mm, while pipes with an outer diameter of 900 mm and 1000 mm are available in lengths of 1000–1500 mm.

► How tight are the outer diameter tolerances for smaller pipe sizes?

Smaller pipes, such as those with a 200 mm outer diameter, have an OD tolerance of ±2.0 to ±3.0 mm, ensuring precise dimensional accuracy for tight-fit installations.

► Can custom wall thickness be ordered outside the standard range?

The table lists standard wall thickness ranges for each diameter. For special project requirements, it is recommended to contact the supplier directly to discuss custom wall thickness options and feasibility.

► Why do wall thickness tolerances increase with larger pipe diameters?

As the outer diameter increases, the manufacturing process becomes more complex and the absolute dimensional variation naturally grows. Larger pipes require wider tolerance ranges to account for material behavior and production constraints while still meeting structural performance standards.

High-Quality High-Temperature Oversized Fused Quartz Tube from China Suppliers - Factory Direct for Large Applications Factories, Products

Product Description

Product Specifications

Frequently Asked Questions

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