Our products include Pharmaceutical neutral glass tube, tubular vial, moulded glass vial, ampoule, rubber stoppers and tear-off caps, Borosilicate clear and colored glass tube and rod, glass cylinder and borofloat glass sheet, and the Lead glass tube, lead free glass tube.

Borosilicate Glass 3.3 Tube No.
Physics performance
Numerical #118alue
Unit

1
Coefficient of mean linear thermal expansion(20-300 )
3.3± 0.1
10-6K-1

2
Transformation Temperature
525± 15

3
Softening point
820± 10

4
Working point
1260± 20

5
Density at 20
2.23± 0.2
G/cm2

6
Mean thermal conductivity(20-100)
1.2
W/m. K

7
Refractive Index
0.92
L

Chemical Composition in approximate weight %( main components)
Item.
SiO2
B2O3
AL2O3
Na2O +K2O

%
81
13
2
3.08

Chemical data:
Hydrolytic resistance at 98 ISO719-HGB 1
Hydrolytic resistance at 121 ISO720-HGB 1
Water resistance Grade 1 Test method: ISO1776
Acid resistant Class Grade 1 Test method: ISO1776

Product Feature
Borosilicate Glass 3.3 Tube
Produced by the international standards strictly.