Fused Quartz Tubing · Semiconductor · UV · Lab · Furnace
Quartz Glass Tube Manufacturer & Supplier
A quartz glass tube is a cylindrical component made from high-purity fused silica that withstands far higher temperatures, harsher chemistry and wider light wavelengths than ordinary glass. Also called fused quartz tubing, it is the core material for semiconductor diffusion and process tubes, UV and infrared lamp tubes, and high-temperature laboratory and furnace tubes. FGQuartz has manufactured precision quartz glass tube products since 2005 from Lianyungang, China, supplying standard and fully custom tubing to buyers worldwide.
- High Purity
- Fused Silica
- Grade matched to your needs
- 1200°C
- Continuous Service
- ~1300°C short-term
- Custom OD/ID
- Cut to Drawing
- Flanges · sealed ends · ports
- Est. 2005
- 20 Years’ Experience
- Ships internationally
What Is a Quartz Glass Tube?
A quartz glass tube is a hollow cylinder drawn from high-purity fused silica. Because the material is almost pure SiO₂, it stays dimensionally stable under extreme heat, resists thermal shock, transmits ultraviolet through infrared light, and is chemically inert to nearly all acids except hydrofluoric acid.
Why quartz instead of ordinary glass, metal or ceramic? Borosilicate and soda-lime glass soften and contaminate well below 900 °C; metals oxidise and shed particles; many ceramics are opaque and porous. Fused quartz tubing combines the heat resistance of a refractory with optical clarity and ultra-low contamination, which is exactly why it is specified for wafer diffusion, UV sterilisation and precision furnace work.
Key Properties of Fused Quartz Tubing
High Purity
High-purity fused silica with low metallic impurities keeps wafer and lamp processes contamination-free.
High-Temperature Stability
Continuous use to about 1200 °C and short excursions near 1300 °C, with a softening point around 1680 °C.
Thermal-Shock Resistance
A very low expansion coefficient lets a tube move between hot and cold zones without cracking.
Broad Optical Transmission
Clear grades pass UV, visible and infrared light, making them suited to lamp and sensor tubing.
Chemical Inertness
Resistant to most acids and solvents (excluding hydrofluoric acid), ideal for aggressive lab and process chemistry.
Electrical Insulation
Strong dielectric performance is retained at high temperature for heater and high-voltage assemblies.
Types of Quartz Glass Tube We Supply
From standard clear tubing to fully custom assemblies, the range below covers the most requested quartz glass tube formats. Tell us the application and we will match the right type and grade for you.
Clear Quartz Glass Tube
Transparent fused quartz tubing for optical, lamp and general high-temperature use.
Clear grade · polished or as-drawn
Opaque / Milky Quartz Tube
Diffuse opaque grade that spreads heat evenly and screens the work zone from glare.
Opaque grade · even thermal radiation
Quartz Diffusion Tube
High-purity quartz diffusion tube for wafer diffusion, oxidation and LPCVD furnaces.
Semiconductor grade · low metals
UV Quartz Tube
UV-transparent UV quartz tube for germicidal lamps, water treatment and curing systems.
UV-grade · high UV transmission
Infrared Heater Tube
Twin-bore and single-bore tubing for infrared heating elements and emitters.
Clear or opaque · heater format
Large-Diameter Furnace Tube
Big-bore tubing for tube furnaces, sintering lines and thermal processing equipment.
Large OD · controlled wall
Quartz Process Tube
Quartz process tube for thermal, CVD and annealing systems, made to chamber dimensions.
Process grade · cut to equipment
Capillary Tube
Small-bore precision capillaries for analytical, sensor and laboratory instruments.
Fine bore · tight tolerance
Flanged / Sealed / Custom Tube
When a standard length of tubing is not enough, we finish it into a ready-to-fit part. Tubes can be supplied with ground or fire-polished flanges for vacuum and process connections, closed (sealed) ends for test tubes and reaction vessels, side ports for gas inlets and thermocouples, or bends and elbows for routed assemblies. Combine several features on one piece and we build the whole tube to your drawing.
Built to spec from DXF / STEP / IGES · single prototypes to production · custom fabrication →
How to Choose the Right Quartz Glass Tube
Clear vs. opaque (milky)?
Choose clear tubing when you need light to pass through or want to see the work, such as UV lamps and optical paths. Choose an opaque grade when you want diffuse, even heat and a thermal shield, common in heaters and some furnace zones.
Polished vs. as-drawn ends?
Fire-polished or ground ends matter for optical coupling, sealing and clean mating faces. As-drawn ends are economical where the cut face is not critical. We can fire-polish, square-cut or flange the ends to suit.
Which grade for my process?
Diffusion and CVD work needs the lowest-metal semiconductor grade; UV systems need a high-UV-transmission grade; general furnace work can use a standard grade. We carry several grades, so the exact one is confirmed with our team against your application — not chosen by a code on this page.
Not sure which to pick? Send us your operating temperature, environment and dimensions and we will recommend the right material and finish.
Applications of Quartz Glass Tube Products
Semiconductor Manufacturing
Diffusion, oxidation, LPCVD and annealing tubes for wafer fabs.
High-Temperature & Furnaces
Process, protection and heater tubes for tube furnaces and thermal lines.
Optical Fiber Production
Substrate and deposition tubing for preform manufacturing.
Laboratory & Analysis
Heat-resistant reaction and combustion tubing for research labs.
UV & Sterilisation
UV-transparent tubing for germicidal lamps, water treatment and curing.
UV quartz tube formats
Lighting Industry
Envelopes and arc tubes for halogen, UV and specialty lamps.
Clear & doped tubing
Custom Quartz Tube Fabrication
Send a drawing or a description of your application and we will build the tube to match. We accept DXF, STEP and IGES files and produce single-piece prototypes through to production runs.
to length and squareness
optical-quality ends and surfaces
vacuum and process connections
gas inlets, thermocouple ports
elbows and shaped sections
test tubes and reaction vessels
Specifications & Options
| Form | Round tube; single- or twin-bore; capillary |
| Appearance | Clear (transparent) or opaque (milky) |
| Diameter range | Approx. 5–1000 mm OD (capillary to large furnace tube) |
| Wall & length | Controlled wall thickness, excellent concentricity; cut to length |
| End forms | As-drawn, ground, fire-polished, sealed, flanged |
| Surface | As-drawn or polished |
| Grade | Matched to your application & confirmed before production |
Dimensions and finish are made to order. We carry several material grades; the exact grade is recommended by our team based on your use case rather than ordered from a code, to avoid mismatches.
Quality Control & Why FGQuartz
Every quartz glass tube goes through a strict in-house quality process, with inspection at each stage:
- Raw-material purity verification
- Dimensional inspection on every custom order
- Surface and visual quality check
- Optical and thermal performance testing where specified
Backed by experience since 2005, in-house machining for bespoke orders, a stable high-purity material supply and international shipping, FGQuartz serves semiconductor, laboratory, lighting and industrial customers — from standard catalogue tubing to one-off custom builds.
Quartz Glass Tube FAQ
What is a quartz glass tube made of?
It is made from high-purity fused silica, giving it far better heat, chemical and optical performance than ordinary glass.
What temperature can fused quartz tubing withstand?
Quartz tubing works continuously to about 1200 °C, tolerates short excursions near 1300 °C, and softens around 1680 °C.
What is the difference between clear and opaque (milky) quartz tubes?
Clear tubing transmits light and lets you see the process; opaque tubing scatters light for diffuse, even heating and acts as a thermal screen. The right choice depends on whether light transmission or heat distribution matters more.
What is a quartz diffusion tube used for?
A quartz diffusion tube is the low-metal process tube used in semiconductor diffusion, oxidation and LPCVD furnaces, where contamination from the tube would ruin the wafers.
Can you supply UV quartz tubes?
Yes. We supply UV-grade UV quartz tube products with high ultraviolet transmission for germicidal lamps, water treatment and UV curing.
What is a quartz process tube?
A quartz process tube is tubing cut and finished to the dimensions of a specific furnace or CVD chamber so it fits the equipment exactly.
What diameters and lengths can you make?
We supply everything from fine-bore capillaries to large-diameter furnace tubes (roughly 5–1000 mm OD), with controlled wall thickness, excellent concentricity and cut-to-length service.
Do you offer custom quartz tube fabrication?
Yes. We add flanges, sealed ends, side ports, bends and fire-polished faces, and work from DXF, STEP or IGES drawings, including single-piece prototypes.
Which grade should I choose?
We carry several grades, so we recommend the grade based on your application and confirm it before production rather than asking you to pick a code — this avoids costly misunderstandings.
Do you ship internationally?
Yes. FGQuartz ships quartz glass tube orders internationally and handles export documentation.
Related Quartz Products
Browse the full quartz glass product range or see every quartz glass application.
Whether you need standard fused quartz tubing, a UV quartz tube, a semiconductor diffusion tube or a fully custom assembly, FGQuartz is ready to quote. Tell us your dimensions and application and we will match the right tube for you.