WT Glass provide high quality borosilicate sight glass tubes. Heat & chemical resistant, ideal for industrial use. Custom sizes available. Request a quote today!
Outer diameter 4mm to 400mm, thickness 0.8 to 12mm, length 9.5mm to 1500mm.
| Material | Borosilicate Glass |
|---|---|
| Outer diameter | 150mm, can customise 4mm to 400mm |
| Thickness | 9mm, can customize 0.8 to 12mm |
| Length | 120mm, can customize 9.5mm to 1500mm; Glass can be cut to any desired length needed |
| Edge | Grind or Polish |
Premium Borosilicate Sight Glass Tubes – Built for Extreme Conditions!
Enhance your industrial equipment with our high-quality borosilicate sight glass tubes, designed for superior thermal shock resistance, chemical durability, and optical clarity. Perfect for high-pressure steam, aggressive chemicals, and extreme temperatures, our sight glass tubes ensure reliable performance in pharmaceutical, chemical processing, food & beverage, and oil & gas applications.
Made from 3.3 high-borosilicate glass, our tubes offer:
✔ Exceptional heat resistance (up to 450°C)
✔ Strong chemical stability (resists acids & alkalis)
✔ High transparency for easy monitoring
✔ Precision machining for leak-proof sealing
Trusted by manufacturers worldwide, our sight glass tubes meet ISO, DIN, and ASTM standards. Custom sizes & coatings available. Request a quote today and upgrade your system with durable, high-performance borosilicate glass!
Visit our website now for specs & bulk order discounts!
Size:
Outer diameter: 4mm to 400mm;
Thickness: 0.8 to 12mm;
Length: 9.5mm to 1500mm
Edge finishing: fire polished edge; grind flat edge; polished edge; thread edge; closed bottom.
Surface finishing: sandblasting; printing.
| Chemical Performance | |||||
| 1 | SiO2 | B2O3 | Na2O | Al2O3 | Fe2O3 |
| 80.3% | 13.04% | 4.17% | 2.44% | 0.027% | |
| 2 | Water resistance | ISO0719 I | |||
| 3 | Acid resistance | ISO0195 I | |||
| 4 | Alkali resistance | ISO0695 II | |||
| Mechanical Performance | |||||
| 5 | Density ρ | 2.2250g/cm3 @24℃ | |||
| 6 | Bending Strength | 150N/mm2 | |||
| 7 | Surface compressive stress | 90N/mm2 | |||
| 8 | Young’s modulus | 64 GPa | |||
| 9 | Poisson’s ratio | 0.2 | |||
| 10 | Hardness | 5.5 Mohs, (470 Knopp, 580 Vickers) | |||
| 11 | Elastic Modulus | 67KNmm-2 | |||
| Thermodynamic Performance | |||||
| 12 | Thermal Expansion Coefficient (0-300℃）(20-300) | ≤3.3*10-6K-1 | |||
| 13 | Softening Point | 820±10℃ | |||
| 14 | Strain Point | 520±10℃ | |||
| 15 | Annealing Point | 560±10℃ | |||
| 16 | Caloricity (20-100℃) | 0.83KJ* (kgxK)-1 | |||
| 17 | Thermal Coefficient | 1.2WxmxK-1 | |||
| 18 | Thermal Shock Resistance | 180K | |||
| 19 | Max Working Temperature | -70 up to 500℃ Short time (＜10h） | |||
| 20 | Max Working Temperature | -70 up to 280℃ Long time (＞10h） | |||
| Eletric Property | |||||
| 21 | Electric Volume Resistivity | 8.6×1013Ωxcm (at 25℃） 1.4×106Ωxcm (at 300℃） 1.4×10 6Ωxcm (at 300℃） | |||
| 22 | Dielectric Dissipation Fraction | 38×10-4 (at 1MHz, 20℃） | |||
| 23 | Dielectric Constant εr | 4.6 (at 1MHz, 20℃） | |||
| Optical Property | |||||
| 24 | Refractive Index | 1.4714 @24℃ | |||
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