Custom High Borosilicate Glass Tube — Made to Your Drawing, OD 1mm–300mm
Custom high borosilicate glass tube is a made-to-order glass tubing solution engineered to your exact dimensions, end finishes, and application requirements. From single prototypes to OEM production runs, every tube is produced to drawing with full dimensional and material traceability.
What Can Be Customized
Unlike standard stock tubing, this product is built around your specifications. The following customization options are available:
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Outer Diameter (OD) — 1 mm to 300 mm, negotiated to your application requirements
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Wall Thickness — 0.5 mm to 5.0 mm; thick walls for strength, thin walls for light transmission
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Length — 10 mm to 2,000 mm with precision cutting tolerances down to ±0.5 mm, or supplied as continuous long tubes
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End Finish — Fire polished, clean cut, flared, or flanged for safe handling and assembly
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End Shape — Open end, fire-sealed bottom, or special beveled edge
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Tube Body — Straight tubing or custom bent (U-bends, coils, custom angles and radii)
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Surface Treatment — Frosted/ground, graduation markings, or printed logo/markings
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Packaging — Individual cardboard sleeves, foam dividers, or custom carton boxing for OEM/ODM branding
Applications
Custom high borosilicate glass tubes are specified when standard sizes cannot meet assembly or performance requirements:
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Laboratory Apparatus Fabrication — Custom distillation setups, reactors, and analytical instruments
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Pharmaceutical & Diagnostic — Custom vials, ampoules, and sample tubes
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Industrial Sight Glasses — Boiler and pipeline observation windows with specific diameters
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Lighting & Electronics — Tailored outer tubes for high-power lamps and sensors
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Solar Thermal — Vacuum collector tubes in non-standard dimensions
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OEM/ODM Glassware — Private-label laboratory and consumer glass products
Material & Advantages
Manufactured from 3.3 borosilicate glass with a low coefficient of thermal expansion of approximately 3.3 × 10⁻⁶/K, these tubes deliver reliable thermal shock resistance and chemical durability.
Why custom high borosilicate glass tube over standard stock:
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Exact Fit — Eliminates assembly gaps and rework caused by mismatched standard sizes
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Design Freedom — Bent, flared, and sealed forms unlock apparatus geometries not possible with stock tubing
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One-Piece Construction — Reduces joints and potential leak points in critical systems
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Brand Differentiation — Surface markings and custom packaging support private-label products
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Cost Efficiency — Material properties between standard borosilicate and high-purity quartz, at a lower price point than quartz for moderate thermal applications
Technical Specifications
| Parameter | Specification |
|---|---|
| Material | Borosilicate 3.3 |
| Coefficient of Thermal Expansion | ~3.3 × 10⁻⁶/K |
| Softening Point | ~820°C |
| Max Working Temperature | ≤500°C |
| Density | ~2.23 g/cm³ |
| Light Transmittance | ≥90% (visible light) |
Customization Range
| Item | Range | Tolerance / Notes |
|---|---|---|
| Outer Diameter (OD) | 1 mm – 300 mm | Negotiated per drawing |
| Wall Thickness | 0.5 mm – 5.0 mm | ±10% |
| Length | 10 mm – 2,000 mm | Cutting tolerance down to ±0.5 mm; continuous tubes available |
| End Finish | Fire polished, clean cut, flared, flanged | Per assembly requirement |
| Tube Form | Straight, U-bend, coil, custom angle/radius | Shape fixed during fabrication |
Certifications
Complies with ISO 3585 for borosilicate 3.3 glass tubing, covering outer diameter range 4 mm to 300 mm. Material also conforms to USP Type I and ASTM E438 Type I requirements for chemical and thermal durability.
Evidence & Examples
Inspection Report — Every custom production batch undergoes dimensional verification against the approved drawing, including OD, wall thickness, length, and end-finish inspection. Full data is recorded in the batch inspection report.
Customer Case — A research institute required bent borosilicate tubes with fire-polished ends for a custom photobioreactor assembly. Tubes were produced to provided CAD drawings with ±0.5 mm cutting tolerance and consistent bend radii across the production run, fitting the instrument manifold without modification.
Request a Quote
Send us your drawing, sample, or specification. Contact us for a free sample and a tailored quotation. We support small-batch trial production and large-scale OEM/ODM delivery.
