Tempered borosilicate glass for fireplaces

Tempered borosilicate glass 1)Excellent high temperature performance 2)can used in Portable Bio Ethanol Fireplaces

Tempered Borosilicate glass tube, glass tube, glass cylinder ,borosilicate 3.3 glass tube,

Heat resistant up to 400°C

Available size:

1) Outer diameter: 4mm - 315mm

2) Different wall thickness available

 3) Standard length: according your need.

Main composition:

1) SiO2: 80±0.5%

2) B2O2: 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) Transformation temperature: 525±15°C3)

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

Thermal conductivity cal/cm·s°C   0.0028

Resistivity lgρ(25°C)   15

Thermal shockv resistance ΔT°C  230

specific heat capacity(0-100°C)0.195cal/g

 

 

Tempered borosilicate glass for fireplaces