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.

Custom Oversized Fused Quartz Tube for High Temp Applications Manufacturers, Factory

1 / 4

Custom Oversized Fused Quartz Tube for High Temp Applications Manufacturers, Factory

Large-diameter quartz tubes are made of high-purity quartz material, with diameters reaching tens of centimeters and a maximum diameter of one meter. They possess characteristics such as high temperature resistance, corrosion resistance, and excellent light transmittance, making them suitable for large high-temperature furnaces. They are used in large-scale production in fields such as photovoltaics, semiconductors, and metallurgy, and are key components of large-scale heat treatment equipment.

Send Inquiry

Product Description

Product Specifications

Key Specifications

Diameter Range	Outer diameter 80mm–600mm, inner diameter customizable based on wall thickness requirements
Length Range	1000mm–6000mm (continuous length available for special orders)
Wall Thickness	5mm–20mm (precision machined to ensure uniform thickness)
Surface Finish	Polished inner/outer surface (Ra ≤ 0.2μm) for high light transmittance (≥90% for UV-visible light)

Chemical Composition (Grade: FD-5)

Grade	Al	Ca	Mg	Cr	Cu	Fe	Ni	Mn	Li	Na	K	Ti	B
FD-5	14	0.5	<0.1	<0.03	<0.03	0.3	<0.03	<0.2	0.4	0.8	0.6	1.2	<0.1

Product Parameters & Tolerances

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

Physical & Mechanical Properties of Quartz Glass

Mechanical / Thermal Behavior	Standard Values
Density	2.2 g/cm³
Compressive strength	1100 Mpa
Flexural strength	67 Mpa
Poisson's ratio	0.14 ~ 0.17
Young's modulus	72000 Mpa
Modulus of rigidity	31000 Mpa
Mohs hardness	5.5 ~ 6.5
Transformation point	1280°C
Softening Point	1780°C
Annealing point	1250°C
Specific heat (20 ~ 350 °C)	670 J/kg·°C
Thermal conductivity (20 °C)	1.4 W/m·°C
Index of refraction	1.4585
Low thermal expansion coefficient	5.5×10⁻⁷ cm/cm·°C
Thermal processing temperature	1750 ~ 2050°C
Short-term use temperature	1300°C
Long-term use temperature	1100°C
Material	Silicon Dioxide (Natural Quartz)
Color	Transparent or colorless
Surface	No Air Bubble, no line
Strain	1270°C Fused Quartz Glass Brick
PPM grade	Controlled 10 / 20 / 100 PPM
Shape	Circle
Thickness	2mm - 20mm

Frequently Asked Questions (FAQ)

Q1 What are the maximum continuous operating temperatures for this quartz glass?

The quartz glass supports a continuous long-term operating temperature of up to 1100°C, and can withstand peak short-term working temperatures reaching up to 1300°C without structural deformation.

Q2 Can outer dimensions and wall thickness be customized?

Yes. While standard outer diameters range from 80mm to 1000mm and lengths from 1000mm to 6000mm, inner diameters and wall thicknesses (ranging from 2mm to 45mm depending on diameter) can be precision customized to fit your requirements.

Q3 What optical properties and surface quality can be expected?

Our quartz glass is polished on both inner and outer surfaces with a surface roughness of Ra ≤ 0.2μm, delivering an optical transmittance of ≥90% across the UV-visible spectrum with no visual defects such as lines or bubbles.

Q4 What makes this material resistant to extreme thermal shock?

Due to its extremely low coefficient of thermal expansion (5.5×10⁻⁷ cm/cm·°C), natural fused quartz glass exhibits exceptional resistance to severe thermal shocks and rapid temperature variations without cracking.

Q5 What purity grades are available for chemical applications?

The product is manufactured from high-purity natural quartz (Grade FD-5) with tightly controlled trace element levels (controlled PPM grades of 10, 20, or 100 PPM), making it ideal for semiconductor and high-purity chemical processing.

Custom Oversized Fused Quartz Tube for High Temp Applications Manufacturers, Factory

Product Description

Product Specifications

Frequently Asked Questions (FAQ)

Related Products

Custom Oversized Fused Quartz Tube for High Temp Applications Manufacturers, Factory

High-Quality Oversized High-Purity Fused Quartz Tubes for High Temp Applications - China Suppliers and Factory Manufacturers, Product

Wholesale High-Temperature Resistant Transparent Quartz Glass Ring | China Suppliers & Factory for Insulation Applications Manufacturers, Factories

Custom High Purity Quartz Rod / Fused Silica Rod for Semiconductors & Labs - Quality China Suppliers & Factory Supplier, Suppliers

Wholesale Quartz Microchannel Flow Cell Manufacturers, Supplier

Wholesale Fused Silica Quartz Plate from China - High-Temperature Resistant Supplier & Factory for Optoelectronic Applications Manufacturer, Manufacturers

Wholesale High-Quality Quartz Boats for High-Temperature Processes - China Suppliers & Factory Supplier, Factories

Custom High-Quality Fused Silica Quartz Plates from China Suppliers - Heat Resistant Factory Products Manufacturers, Suppliers

Wholesale Quartz Bell Jar with Excellent Thermal Stability Factories, Products

High-Quality China Suppliers Factory Fused Silica Quartz Plate - Heat Resistant, High Purity, Custom Sizes Available Manufacturer, Products