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 Oversized Fused Quartz Tubes for High Temp Applications - China Suppliers & Factory Supplier, Suppliers

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High-Quality Oversized Fused Quartz Tubes for High Temp Applications - China Suppliers & Factory Supplier, Suppliers

Discover high-quality large-diameter quartz tubes from leading suppliers in China. Our quartz tubes, crafted from high-purity quartz material, feature diameters ranging from several centimeters up to an impressive one meter. Engineered for exceptional performance, these tubes offer high temperature resistance, corrosion resistance, and superior light transmittance, making them ideal for large high-temperature furnaces. As integral components in large-scale heat treatment equipment, they are widely utilized in the fields of photovoltaics, semiconductors, and metallurgy. Partner with our factory to enhance your production capabilities with our premium quartz solutions

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Product Description

⭕Outer Diameter (mm)	📐Outer Diameter Tolerance (mm)	📏Standard Wall Thickness (mm)	🔧Wall Thickness 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

Q1 What does the outer diameter tolerance mean in this specification table?

The outer diameter tolerance refers to the allowable deviation from the nominal outer diameter during manufacturing. For example, a pipe with an outer diameter of 200mm may have a tolerance of ±2.0～±3.0mm, meaning the actual diameter can vary within that range while still meeting quality standards.

Q2 Why does the standard length decrease for larger diameter pipes?

Larger diameter pipes (700mm and above) have a reduced standard length range of 1000～1800mm or 1000～1500mm due to increased weight, handling complexity, and transportation constraints. Shorter lengths help ensure safe and efficient logistics.

Q3 Can custom wall thickness be ordered outside the standard range?

Yes, custom wall thickness options beyond the listed standard ranges may be available upon request. Please contact our technical team with your specific project requirements, and we will assess feasibility based on material and manufacturing capabilities.

Q4 What is the significance of wall thickness tolerance in pipe selection?

Wall thickness tolerance indicates how much variation is permitted in the pipe wall during production. Tighter tolerances ensure more consistent performance under pressure and structural loads, which is critical for applications requiring precise engineering specifications.

Q5 Are these specifications compliant with international standards?

The dimensional tolerances listed in this table are generally aligned with common international manufacturing standards. However, specific compliance with standards such as ASTM, EN, or ISO should be confirmed based on your project requirements and regional regulations.

Q6 How do I select the right outer diameter and wall thickness for my application?

Selecting the appropriate outer diameter and wall thickness depends on factors such as operating pressure, fluid type, installation environment, and load-bearing requirements. We recommend consulting with our engineering team to match the correct specification to your specific application needs.

High-Quality Oversized Fused Quartz Tubes for High Temp Applications - China Suppliers & Factory Supplier, Suppliers

Product Description

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