Quartz Furnace Tube
Oversized Quartz Tube
Quartz Boat
Quartz Plate
Quartz Lamp Holder
Quartz Rod
Quartz Ring
Customized Quartz Products
Plasma-Fused Quartz Ingots
Quartz Irregular Shaped Sheets
Quartz Crystal Singing Pyramid
Half-white Coated Short-wave Infrared Quartz Heating Lamp
Pioneering Precision Quartz Manufacturing
Lianyungang Southeast Quartz Products Co., Ltd., established in 2015, is located in Donghai County, Lianyungang City, Jiangsu Province—a nationally recognized industrial hub for silica raw materials in China. As an industry-leading Custom Quartz Tubes Manufacturer integrating advanced R&D, customized engineering design, precision processing, domestic sales, and global export trade, Southeast Quartz stands at the forefront of high-purity glass technology.
By harnessing the extraordinary naturally occurring quartz crystal deposits in Donghai County, we specialize in the deep processing of high-purity fused quartz tubes, quartz furnace tubes, bell jars, crucibles, and customized laboratory instruments. Our components serve as essential consumables across semiconductor fabrication, solar photovoltaic (PV) wafer processing, high-temperature chemical synthesis, optical fiber production, and UV disinfection systems worldwide.
10+
Years Industry Leadership
99.99%
SiO2 Purity Level
1200°C
Continuous Temp Endurance
50+
Global Export Markets
Why Choose High-Purity Fused Quartz Tubes?
Unmatched material integrity engineered to withstand the most demanding thermal, chemical, and physical environments.
Extreme Thermal Endurance
Fused silica features a softening point of approximately 1680°C and maintains optimal structural integrity during continuous operation at 1100°C to 1200°C. Its near-zero thermal expansion coefficient ensures near-total immunity to rapid thermal shock.
Ultra-High Chemical Purity
With an SiO2 concentration exceeding 99.99% (4N purity), our customized quartz tubes minimize heavy metal trace impurities (Fe, Al, Ti, Na, K) to single-digit PPM levels, safeguarding sensitive semiconductor wafers against contamination.
Superior Optical Clarity
Offering exceptional light transmission across the ultraviolet (UV), visible, and infrared spectral wavelengths, our clear quartz glass tubes provide crystal-clear transparency essential for optical instruments and UV sterilization devices.
Fused Silica Material Specifications Summary
| Property Parameter | Typical Standard Value | Industrial Performance Advantage |
|---|---|---|
| Chemical Purity (SiO2) | ≥ 99.99% (4N Grade) | Prevents ion diffusion & wafer oxidation during high-temp processing |
| Density | 2.2 g/cm³ | Lightweight, rigid structural integrity |
| Continuous Working Temperature | 1100°C - 1200°C | Ideal for diffusion, annealing, CVD furnace linings |
| Short-Term Max Temperature | 1350°C - 1450°C | Resists temporary thermal spikes without warping |
| Thermal Expansion Coefficient | 5.5 × 10⁻⁷ /°C (20°C–320°C) | Near zero expansion; immune to severe thermal shock |
| Transmittance (Clear Quartz) | > 90% (200nm to 2500nm range) | High UV-Vis-IR throughput for analytical instruments & optics |
Featured High-Purity Fused Quartz Products
Browse our core quartz components manufactured for laboratory research, semiconductor fabrication, and industrial heating processes.
Oversized Fused Quartz Tube for High Temp Applications
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Custom Size Quartz Furnace Tube for Lab & Industry
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Quartz Bell Jar with Excellent Thermal Stability
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Premium Quartz Boat for High Temp Processes
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High Purity Quartz Digestion Tube for Laboratory
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Heat Resistant Quartz Lamp Holder for Industrial Use
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Fused Silica Quartz Plate – Heat Resistant
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High Purity Quartz Rod / Fused Silica Rod
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Custom Transparent Quartz Glass Insulation Ring
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Introduction to Plasma-Fused Quartz Ingots
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Full Range Customized Quartz Instruments & Glassware
Tailored dimensions, flanged ends, ground joints, spiral coils, precision optical windows, and tri-acid purification systems built according to your CAD drawings.
Explore Custom FabricationGlobal Quartz Excellence & Advanced Advantages
Rooted in Donghai County with strict adherence to global quality control standards.
Customer Supreme Philosophy
Adhering to the core philosophy of "Quality First, Customer Supreme, Innovation-Driven, Integrity Management", Southeast Quartz has established a complete pre-sales, in-process engineering, and after-sales support system for international clients.
Multi-Tier Quality Control
All quartz products undergo rigorous inspection, including helium mass spectrometry leak detection, ultra-high pressure resistance tests, optical purity analysis, and stress relief checks before leaving our factory floor to guarantee zero bubbles and zero micro-cracks.
Tailored Customization Services
We provide rapid prototyping and flexible custom manufacturing. Outer diameters from 2mm to 600mm, wall thicknesses from 0.5mm to 15mm, and specialized cut-outs, flanges, or sealing solutions can be produced to exact OEM specifications.
Diverse Industrial Applications of Fused Quartz
High-purity quartz tubing and component solutions engineered specifically for high-stress industrial environments.
Semiconductor Fabrication
Used extensively in diffusion furnaces, LPCVD process chambers, etch bath tanks, and wafer carrier boats. Ultra-high purity ensures maximum yield by eliminating trace element contamination during high-temperature thermal steps.
Explore Semiconductor Applications →Photovoltaic Solar Manufacturing
Quartz furnace tubes and quartz boats act as fundamental process vessels for monocrystalline and polycrystalline silicon cell processing, including phosphorus diffusion, oxidation, and anti-reflective coating steps.
Explore Solar PV Solutions →Chemical & Tri-Acid Purification
Due to its total resistance to acid corrosion (except HF acid), fused silica glass is crafted into chlorine and hydrogen burners, acid condensers, distillers, and tri-acid purification hardware for reagent manufacturing.
Explore Chemical Equipment →Laboratory Analytical Equipment
Essential for high-temperature pyrolysis, combustion tubes, digestion vessels, UV spectrophotometer cells, and customized experimental setups requiring transparency and heat resistance.
Explore Laboratory Uses →Electric Light Source & UV Curing
Quartz lamp envelopes, ozone-free UV lamp tubes, high-intensity discharge (HID) lamp holders, and IR heating tubes benefit from high UV clarity and rapid thermal shock survival.
Explore Lighting & IR Components →Insulation & Thermal Barriers
Precision-machined quartz insulation rings, flange plates, and thermal shields prevent heat loss while insulating sensitive electronics in vacuum processing equipment.
Explore Quartz Insulation →State-of-the-Art Production & Processing Display
A glimpse inside our standardized production workshops, cutting-edge glassworking lathes, and automated finishing equipment.
Product Deep Processing Capabilities
Factory Workshop & Infrastructure
Certified Quality & Global Compliance
Our commitment to excellence is validated by international environmental, safety, and purity standards.
At Lianyungang Southeast Quartz Products Co., Ltd., quality is integrated into every step of our manufacturing workflow. From raw quartz sand purification to continuous flame fusion, glass lathe machining, stress annealing, and cleanroom packaging, we maintain strict compliance with international testing frameworks.
Our high-purity fused quartz tubes are backed by ISO Quality Management certifications, REACH chemical compliance, RoHS hazardous substance restrictions, and SGS material analytical reports. This ensures our worldwide clientele receives zero-defect components optimized for high-yield semiconductor and chemical manufacturing.
Trusted by Customers Worldwide
Quality • Service • Global Presence
Expanding Global Footprint
With dependable product performance, efficient logistics capabilities, and responsive after-sales service, products from Lianyungang Southeast Quartz Products Co., Ltd. not only cover all major industrial provinces in China but are exported across North America, Europe, Southeast Asia, East Asia, and the Middle East.
Continuous Innovation & Research
Looking ahead, Southeast Quartz will continue to deepen its technological expertise in high-purity quartz processing. By continually advancing precision flame processing, plasma melting, and automated CNC glass machining, we strive to supply global high-tech industries with unmatched customized quartz products.
Frequently Asked Questions (FAQ)
Get quick answers regarding custom quartz tube manufacturing capabilities, tolerances, and ordering processes.
What custom dimensions and wall thicknesses can Southeast Quartz manufacture?
We manufacture custom fused quartz tubes ranging from outer diameters (OD) as small as 2mm up to oversized furnace tubes over 600mm. Wall thicknesses range from 0.5mm thin-wall tubing to heavy wall thickness over 15mm. Standard tolerances are within ±0.1mm, with precision grinding available down to ±0.02mm upon request.
What temperature limit can high-purity fused quartz tubes withstand?
Our clear fused quartz tubes can operate continuously at temperatures up to 1100°C - 1200°C. For short durations, they can endure maximum temperatures reaching 1350°C to 1450°C. The softening point occurs around 1680°C.
Can you customize flanged ends, ground glass joints, or sealed bottoms?
Yes. We offer extensive cold-machining and hot-glassworking fabrication, including flat or domed sealed ends, ground glass ball/socket joints, kovar/metal-to-quartz seals, spiral coils, slotted openings, and precision optical windows fused directly to tube bodies.
How do you ensure safe international delivery of fragile quartz glass tubes?
We utilize specialized export-grade protective packaging, incorporating custom PE foam inserts, bubble wrap, inner rigid boxes, and reinforced wood crates for sea or air freight, guaranteeing safe arrival at destination ports worldwide.
Get In Touch with Our Engineers
Contact our sales and engineering team today to discuss your technical drawings, material purity requirements, or request a custom quotation.
Address: No. 1 Qingsheng Rd., Qinghu Industrial Park, Donghai County, Jiangsu, China 222300
Phone: +86 135-8528-2520 / +86 135-8528-6180 / +86 138-5128-2778
Email: karensun@southeastquartz.com | karen.sun@dnquartz.com
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