Your Reliable Partner For Custom Special Glass In China
From a 0.02 mm fiber-optic capillary bore to a four-meter quartz tube, we draw, bore, and finish glass tubing to the tolerances your process actually demands. Every tube is held to tight dimensional limits — down to ±0.002 mm on a precision bore — and checked against the material’s thermal and chemical limits before it leaves the floor. Whether you need a single quartz sleeve for a UV lamp or USP Type I borosilicate stock for medical packaging, we have the materials and the process control to match.
Glass tubing is one of those quietly demanding products. It looks simple, but the bore, the wall, and the material all have to be right, or the part it feeds won’t work. A tube can be drawn from soda-lime, borosilicate, quartz, or sapphire, and each one buys you something different: soda-lime for everyday lab work, borosilicate for thermal shock and chemical resistance, quartz for high purity and continuous service up to 1200 °C, and sapphire where you need an inert, ultra-hard bore.
Choosing the right supplier means more than getting a tube in the right diameter. You want one who can hold the tolerance you specify, certify the material against the standard your industry follows, and finish the ends so they don’t crack in service. That is the combination we focus on, from a single prototype through to volume production.
Drawn from high-purity fused silica, our quartz glass tubes carry properties ordinary glass can't reach: higher hardness, transmittance up to 92%, and steady performance under heat. They come transparent or opaque milky white, in single, twin, spiral, and thick-wall forms, in lengths up to 4 m. You'll find them in semiconductor CVD lines, lamp envelopes, and high-temperature lab work.Standard circular-section tubing in clear or colored glass, the most common profile for laboratory, lighting, and process applications.
Our standard glass tubes cover the broad middle of the market in soda-lime, borosilicate, or quartz, with outside diameters from 5 to 550 mm and lengths from 10 to 2500 mm. They resist most acids and alkalis and hold up under sustained heat. Polished edges and optional color finishing make them as suited to instrument builds as to lab and process plumbing.
When the bore matters as much as the material, we draw precision glass tubing to a tolerance as tight as 0.005 mm. The accuracy takes serious process control, and it's what lets these tubes feed precise instruments and metering equipment where a loose fit isn't an option.
Made from borosilicate with an inserted cavity accurate to ±0.005 mm, our micro capillary tubes are built for the optical communication industry. They come in round, square, and D-type profiles and in single, dual, and multi-mode cavities. Laser-cut ends leave no incision cracks, and the smooth bore avoids empty-gel problems, so they package collimators, pigtails, and DWDM ports cleanly.
Our polished quartz sleeves shield the UV lamp inside air and water purification systems while letting the disinfecting wavelengths pass through. High UV transmission and clean polishing keep the lamp working at full output. They run in kitchen, hospital, laboratory, and wastewater-treatment equipment.
This is neutral borosilicate stock with a mean linear thermal expansion of 4.9 × 10⁻⁶ K⁻¹, rated USP Type I and ISO 719 HGB1 for hydrolytic resistance. It offers the chemical stability and thermal-shock resistance that primary medical packaging requires. Available clear or amber, it's the raw tubing pharmaceutical packagers form into vials, ampoules, and cartridges.
Solid borosilicate and quartz rod, polished on surface and edge, covers both laboratory stirring rods and the rod stock used to build sight glass. It's corrosion resistant against most acids and alkalis and works at 1200 °C for long stretches. Diameter and length are made to your requirement.
Send your drawings, sizes, glass type, thickness, quantity, and application. Our team will help you choose the right material and processing solution.
The material sets the ceiling on temperature, expansion, and chemical resistance, so it’s the first thing to settle. The table below compares the three base glasses we draw most often.
| Property | Soda-lime | Borosilicate | Quartz |
|---|---|---|---|
| SiO₂ content | 60–75% | > 81% | > 90% |
| Density at 25 °C | 2.53 g/cm³ | 2.23 g/cm³ | 2.20 g/cm³ |
| Coefficient of thermal expansion | 8.6 × 10⁻⁶ /K | 3.3 × 10⁻⁶ /K | 5.5 × 10⁻⁷ /K |
| Softening point | 726 °C | 820 °C | 1780 °C |
| Continuous service temperature | 350 °C | 450 °C | 1200 °C |
After material comes the bore. We group tubing into three accuracy classes so you can match cost to what the application really needs.
| Class | Inside diameter | ID tolerance |
|---|---|---|
| Normal glass tube | 5–500 mm | ±0.5 mm |
| Precision glass tube | 5–500 mm | ±0.005 mm |
| Heavy-wall capillary tube | 0.025–0.508 mm | ±0.02 mm
|
For optical-fiber and analytical capillaries, we hold the inner diameter to ±0.002 mm, with bores starting at 0.005 mm. On the pharmaceutical side, our neutral borosilicate stock meets USP Type I and ISO 719 HGB1, with a transformation temperature of 515 °C and a density of 2.32 g/cm³. Quartz tubing carries a Mohs hardness of 5.5–6.5, a compressive strength near 1150 MPa, and transmittance up to 92%.
Most of what we ship is made to a drawing. Catalog sizes rarely match a sensor housing, a fiber collimator, or a vial-forming line exactly, so we cut, bore, and shape tubing to your specification instead of forcing a standard part to fit. Send us a drawing or a sample, and we’ll match the bore, wall, length, end finish, and color. Multi-bore, heavy-wall, square, and D-type geometries are routine, and so are sterilization-ready materials for medical and analytical work.
Every tube follows the same controlled path, scaled from a single prototype to a production run:
Tell us the material, size, thickness, tolerance, quantity, application, and any holes, slots, edges, coating, printing, or polishing requirements. We can manufacture custom glass components from your drawing, CAD file, sketch, or sample.
Yunpu Industrial Zone, Nangang, Huangpu District, Guangzhou
+86-19860070065
sales@specialglass.net
+86 19860070065
+86 19860070065
