Changzhou Longxing Glass Products Factory
Changzhou Longxing Glass Products Factory
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Customized High quality, glass tube used to patio gas heater
Customized, comeptitive price, different size glass tube for outdoor heater
1. Materials is borosilicate glass, Belongs to hard glass
2. Transmittance: Thickness 3 mm glass tube can reach 92%
3. Can bear 600°C temp.
Temp. difference can reach 250°C,
After semi-tempered technology, Temp. difference can reach 350°C
Physical Properties:
| Coefficient of expansion (20°C–30°C) | 3.3 X 10-6 K-1 |
| Density | 2.23g/cm3 |
| Refractive index | (Sodium D line) 1.474 |
| Dielectric constant (1MHz, 20°C) | 4.6 |
| Specific heat (20°C) | 750J/kg°C |
| coefficient of heat conductivity(20°C) | 1.14 W/m°C |
| Visible light transmittance, 3 mm thick glass | 92% |
| Strain temperature | 520°C |
| Annealing temperature | 560°C |
| Softening point at which Borosilicate may deform | 820°C |
| Temp. difference | 250°C |
| Water resistance(ISO 719) | 1级 |
| Acid resistance(ISO 195) | 1级 |
| Alkali Resistance(ISO 695) | 2级 |
Chemical Composition
| SiO2 | 80% |
| B2O3 | 13% |
| NA2O+K20 | 4.3% |
| Al2O3 | 2.4% |
