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Engineered to withstand extreme corrosive atmospheres, rapid thermal cycles, and demanding process kinetics.
Why modern chemical processing, continuous flow synthesis, and ultra-pure acid purification rely on fused quartz glass.
With an exceptionally low coefficient of thermal expansion (approx. 5.5 × 10-7 /°C), fused quartz tubes resist violent temperature fluctuations from red-hot 1100°C to cold liquid quench without catastrophic cracking.
Impervious to hydrochloric, nitric, sulfuric, perchloric, and organic acids at elevated operating temperatures. Fused quartz eliminates metallic ion contamination and ensures total chemical containment in high-purity pipelines.
Offering over 90% optical transmission from 200 nm deep-UV through 2500 nm near-infrared, making it the premier material for photochemical synthesis, UV-chlorination immersion wells, and laser-assisted catalysis.
In chemical engineering equipment design, material selection defines the operational boundaries of temperature, pressure, corrosion resistance, and chemical contamination. Fused quartz (amorphous silicon dioxide, SiO2 with purity exceeding 99.99%) stands as an indispensable material across pilot-scale reactors, continuous tubular flow reactors, gas-phase chlorination columns, tri-acid purification columns, and sub-boiling distillation apparatus.
Traditional borosilicate glass, while widespread in wet laboratory settings, degrades quickly under temperatures above 450°C and suffers from gradual ion leaching when exposed to aggressive mineral acids under reflux. Conversely, specialized metals such as Hastelloy, tantalum, and titanium are cost-prohibitive, opaque to photochemical irradiation, and susceptible to pitting in highly oxidizing or halogenated environments. Fused quartz tubes resolve this engineering dilemma by offering the structural transparency of optical glass paired with refractory thermal tolerance and near-absolute chemical inertia.
With the global chemical industry transitioning from wasteful batch processing to agile, modular continuous flow chemistry, fused quartz tubes serve as precision reactor channels. Photochemical chlorination, bromination, photo-oxidation, and sulfochlorination reactions mandate high-intensity ultraviolet irradiation. Quartz tubes act both as the pressure containment vessel and the optical window, facilitating maximum photon flux into the turbulent reaction stream without solarization or degradation over thousands of continuous operating hours.
In semiconductor fabrication and photovoltaic cell manufacturing, electronic-grade acids (such as electronic-grade nitric, hydrochloric, and hydrofluoric precursors) require parts-per-trillion (ppt) impurity limits. Sub-boiling distillation systems fabricated from fused quartz tubes and condensers prevent metallic leaching (Fe, Al, Cu, Na) that routinely occurs in metallic or resinous equipment. The non-porous, fire-polished interior surface of our fused quartz tubes ensures zero bubble retention, laminar flow dynamics, and frictionless cleaning protocols.
Fused quartz tubes are the central reactor liners for chemical vapor deposition (CVD), fluidized bed pyrolysis, and high-temperature gas-solid reduction. In these environments, process gases like silane, chlorine, ammonia, and hydrogen are energized up to 1100°C–1200°C under continuous vacuum or positive inert pressure. Quartz furnace tubes maintain geometric roundness and structural hermeticity, preventing atmospheric oxygen ingress and thermal expansion mismatch.
Physicochemical, mechanical, and optical benchmark properties of our high-purity fused quartz tubing.
| Property Parameter | Standard Metric Value | Engineering Benefit in Chemical Systems |
|---|---|---|
| SiO2 Purity | ≥ 99.99% (Trace Fe < 0.5 ppm, Al < 15 ppm) | Eliminates catalyst poisoning & acid cross-contamination |
| Continuous Operating Temp | 1100 °C (Short-term up to 1250 °C) | Enables extreme thermochemical synthesis & cracking |
| Softening Point | 1680 °C (Annealing point 1210 °C) | Guarantees dimensional stability under furnace heating |
| Thermal Expansion Coeff. | 5.5 × 10-7 / °C (20 °C to 320 °C) | Withstands rapid thermal shocks from 1100 °C into cold water |
| Acid Resistance | Class 1 / Acid proof (Except Hydrofluoric & Hot H3PO4) | Total corrosion resistance against concentrated boiling acids |
| Optical Spectral Range | 190 nm (UV) — 2800 nm (NIR) ≥ 90% T | Optimal for photochemical reactors & spectroscopic monitoring |
| Dielectric Strength | 25–40 kV/mm at 20 °C | Superior electrical insulation in RF/microwave plasma reactors |
The global demand for high-performance fused quartz tubes is accelerating rapidly, driven by the global expansion of green hydrogen production, carbon capture & utilization (CCU), synthetic e-fuels, and advanced battery material synthesis. As chemical processing moves toward electrification and renewable energy integration, electric-heated quartz tube reactors are replacing traditional fossil-fuel burning tube furnaces, reducing carbon footprint while offering microsecond-level temperature regulation.
Furthermore, the rapid emergence of continuous pharmaceutical manufacturing (Flow Chemistry) mandates inline real-time Process Analytical Technology (PAT). Because fused quartz tubes are non-fluorescent, transparent across Raman, UV-Vis, and NIR frequencies, inline spectrometers can non-destructively monitor intermediate reaction kinetics directly through the quartz wall without inserting intrusive probes that create dead zones or cause corrosion leakage.
A National Silicon Material Base Manufacturer & Deep-Processing Pioneer Since 2015
Lianyungang Southeast Quartz Products Co., Ltd., established in 2015, is located in Donghai County, Lianyungang City, Jiangsu Province—a national base for silicon material industry. As a professional manufacturer integrating R&D, design, production, sales and import & export trade, the company relies on the superior high-quality quartz ore resources in Donghai County, deeply engages in the deep processing of quartz glass, and has become a core supplier of quartz consumables for photovoltaic, semiconductor, laboratory, chemical, lighting and other industries with mature production technology, strict quality control system and complete customized services.
The company has standardized production workshops, advanced quartz processing equipment and a professional R&D team, with full-process production capacity from quartz raw material processing to finished product manufacturing. It can produce a full range of quartz products, including high-purity fused quartz tubes, quartz furnace tubes, quartz bell jars, quartz boats, quartz lamp holders, quartz crucibles, quartz instruments (beakers, condensers, distillers, etc.), and tri-acid purification equipment. All products are made of high-purity fused quartz raw materials, featuring excellent high-temperature resistance (up to 1200℃), thermal shock resistance, corrosion resistance, high light transmittance and good electrical insulation performance, which can meet the demanding working conditions such as vacuum environment, high-temperature sintering, atmosphere control and precision experiments.
Zero-Defect Quality Assurance for High-Risk Chemical & High-Temperature Facilities
Adhering to the philosophy of "Quality First, Customer Supreme, Innovation-Driven, Integrity Management", the company has established a complete quality inspection system. All products undergo multiple tests such as helium mass spectrometry leak detection, pressure resistance test and purity test before leaving the factory to ensure stable performance, no impurities and no leakage. Meanwhile, the company provides flexible customized services, and can customize product sizes, structures and specifications according to customers' equipment parameters and process requirements, quickly responding to personalized orders.
With reliable product quality, efficient delivery capacity and thoughtful after-sales service, the products of Lianyungang Southeast Quartz Products Co., Ltd. not only cover all provinces and cities in China, but also are exported to many countries and regions in Europe, America, Southeast Asia, the Middle East, etc., winning wide recognition and trust from customers at home and abroad. In the future, the company will continue to deeply cultivate the field of quartz products, continuously improve technological innovation and production technology levels, and strive to provide global customers with higher-quality and more professional quartz product solutions, contributing to the high-quality development of high-end manufacturing and scientific research fields.
Precision quartz hot-working lathes, CNC cold-working cutting, ultrasonic cleaning, and optical annealing furnaces.
From Donghai natural high-purity quartz sands to custom chemical engineering components.
Over a decade of manufacturing excellence serving vital high-tech sectors worldwide.
Explore our comprehensive lineup of precision-machined quartz products engineered for demanding process operations.
