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 Oversized Fused Quartz Tube for High-Temp Applications – High-Purity China Factory & Suppliers Factory, Products

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Wholesale Oversized Fused Quartz Tube for High-Temp Applications – High-Purity China Factory & Suppliers Factory, Products

Large-diameter quartz tubes, manufactured in China, are crafted from high-purity quartz material and can reach impressive diameters of up to one meter. These tubes exhibit exceptional temperature and corrosion resistance, along with outstanding light transmittance, making them ideal for use in large high-temperature furnaces. As key components in large-scale heat treatment equipment, our quartz tubes are essential for industries such as photovoltaics, semiconductors, and metallurgy. As a leading factory and supplier, we are committed to providing the highest quality products to support large-scale production needs

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Product Description

Product Specifications

⬅ Scroll horizontally to view full table ➡

⌀Outer Diameter (mm)	📐OD 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

❓ Frequently Asked Questions

Q What does the outer diameter (OD) tolerance mean in this specification table?

The outer diameter tolerance indicates the permissible deviation from the nominal outer diameter during manufacturing. For example, a pipe with an OD of 200mm may have an actual OD that varies by ±2.0 to ±3.0mm. This range ensures the pipe fits properly within standard connection systems while accounting for manufacturing variability.

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

Larger diameter pipes (700mm and above) have shorter standard lengths (1000–1800mm or 1000–1500mm) primarily due to their increased weight and structural considerations. Longer sections of large-diameter pipe become extremely heavy, making transportation, handling, and installation more difficult and potentially unsafe.

Q Can pipes be manufactured outside the listed standard wall thickness ranges?

The standard wall thickness ranges listed represent the most commonly produced and stocked dimensions. Custom wall thicknesses outside these ranges may be available upon special request, depending on the specific application requirements, load-bearing needs, or project engineering specifications. Please contact the manufacturer directly for custom orders.

Q How should I select the appropriate wall thickness for my application?

Wall thickness selection depends on several factors including operating pressure, fluid type, soil conditions (for buried pipes), temperature ranges, and applicable industry standards. As a general rule, higher pressure applications and larger diameters require greater wall thickness. We recommend consulting with a qualified engineer to determine the optimal wall thickness for your specific use case.

Q What international standards do these pipe dimensions conform to?

These pipe specifications are generally aligned with widely recognized international standards such as ISO, ASTM, DIN, and EN series standards for large-diameter pipes. The specific standard applicable to your order may vary based on material type and end-use industry. Please request the relevant certification documentation when placing your order.

Q Are custom lengths available beyond the listed standard length ranges?

Yes, custom lengths may be available depending on the pipe diameter and material. The standard length ranges shown in the table (1000–2000mm) represent the typical production runs. For project-specific requirements that fall outside these ranges, please reach out to discuss feasibility, lead times, and any additional costs that may apply.

Wholesale Oversized Fused Quartz Tube for High-Temp Applications – High-Purity China Factory & Suppliers Factory, Products

Product Description

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