STA high purity borosilicate 3.3 pyrex glass tube
- Category: >>>
- Supplier: Sta Refractory (zhengzhou) Co. Ltd.
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Product Overview
Description
Description:
Borosilicate pyrex glass tubing and rods made by us are well-known for their stability and pressure resistance, good workability and high thermal shock resistance. We have a very low rate of thermal expansion, which makes it an excellent material for laboratory glassware and for use in large-scale technological plants in the chemical apparatus industry. Our products are resistant to corrosion and remain absolutely neutral, even to aggressivechemicals, in nearly all fields of chemistry. This brings them a great advantage over other materials. Borosilicate glass is extremely resistant to water, acids, salt solutions, organic substances and halogens. Tubing, capillary and rod also have a high alkali resistance for physical and chemical properties.
Specifications:
Outer Diameter:30mm-400mm
Wall Thickness:0.5mm-10mm
standard length:1500mm or according per requirment
shape: round, flat, tringle, hexagon
Chemical Compositions and Physical and Chemical Properties
| Chemical Compositions and Physical and Chemical Properties of Borosilicate Glass Type 3.3 | |||||
| composition | SiO2 | B2O3 | R2O | Al2O3 | Fe2O3 |
| weight% | 80.3 | 13.0 | 4.2 | 2.4 | 0.035 |
| Physics performance | Numerical Value | Unit | |||
| Medium coefficient if linear expansion | 3.3±0.1 | 10-6K-1 | |||
| Softening point | 820±10 | °C | |||
| Viscosity temperature | 510±10 | °C | |||
| Uper annealing temperature | 560±10 | °C | |||
| Thermal conductivity(20-100°C) | 1.2 | Wm-1K-1 | |||
| Temperature for the specific electrical resistance | 240 | °C | |||
| 20°C Demsity ρ | 2.23±0.02 | g/cm3 | |||
| Endure water under 98 °C | ISO0719-HGB1 | / | |||
| Endure water under 121 °C | ISO0720-HGA1 | / | |||
| Acid-proof test | Na2O≤100 | µg | |||
| Alkali-proof test | ISO0695 | / | |||
Working point: 1,260±20°C4)
Softening point: 820±10°C5)
Density at 20°C: 2.23g/cm²6)
Hydrolytic resistance at 98°C: ISO719-HGB17)
Hydrolytic resistance at 121°C: ISO720-HGA18)
Acid resistance class: ISO1776-1 9)
Alkali resistance class: ISO695-A2
Packing pictures
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