Manufacturer glass tube large diameter borosilicate glass tube 3.3

Material

Borosilicate glass 3.3

Chemical Properties

Stable

Coefficient of mean linear thermal expansion

3.3

Main composition

SiO2,B2O2,Al2O3,Na2O

Physical performance

Numerical Value

Transformation temperature

525±15 °C

Softening point

820±10 °C

Working point

1260±20 °C

Density at 20°C

2.23±0.02 g/cm3

Mean thermal conductivity(20°C-100°C)

1.2 w/m2k

Refractive index

0.92

Further process

Inside frost ,outside frost ,

hole on the tube, decal printing  

Customized logo/size/shape

Available

Characteristics

Good anticorrosion ;high temperature 

resistance ;high transparency 

Coefficient of mean linear thermal expansion

(20°C, 300°C)

3.3±0.1 10-6K-1

Usage

lamp, lighting accessory , smoking pipe, 

solar evacuated collector tube , handcraft