Technical data for glass tube
Main composition:
1) SiO2: 80 +-0.5%
2) B2O3: 13+- 0.2%
3) Al2O3: 2.4+- 0.2%
4) Na2O(+K2O): 4.3+-0.2%
Chemical properties:
1.Coefficient of mean linear thermal expansion:
(20°C/300°C):3.3 ±0.1 (10-6K-1)
2. Density at 20 °C: 2.23G/cm
3.Size: OD 8-315 mm,Wall thickness:1.0-10mm,Length:1500mm
4. Color: clear/Transparent.
5.Softening point: 820±10℃
6.Transformation temperature:525±15℃
7.Hydrolytic resistance at 90℃: ISO719-HGB1
8.Hydrolytic resistance at 120℃: ISO720-HGA1
9. Acid resistance class: ISO1776-1
10.Alkali resistance class: ISO695-A2
Feature:
1) with high transparency
2) of high temperature resistance
3) various sizes for select