5mm 6mm 7mm 8mm small dia borosilicate 3.3 glass tube / hollow glass cylinder

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