Borosilicate Glass Tube Coloured Glass Tube Glass Tube

Top quality borosilicate glass tube
1.Clear or colored borosilicate glass tube and rod.
2.can produce sizes as clients request.
3.maily use for making laboratory glassware,smoke pipe,glass Jar,lighting glass,building glass,and so onProduct Description
Borosilicate Clear Glass
Physical data sheet
No.
Physics performance
Numerical Value
Unit
1
coefficient of mean linear thermal expansion(20ºC;300 ºC)
3.3±0.1
10-6 K-1
2
Transformation Temperature
525±15
ºC
3
Softening point
820±10
ºC
4
Working point
1260±20
ºC
5
Density at 20ºC
2.23±0.2
g/cm2
6
Mean thermal conductivity(20ºC-100ºC)
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 98ºC ISO719-HGB 1
Hydrolytic resistance at 121ºC ISO720-HGB 1
water resistance Grade 1 Test method: ISO1776
Acid resistant Class Grade 1 Test method: ISO1776Packaging & ShippingOur Services1.Can produce as client request.2.Can cut round ends,and do fire-polished also.3.Can produce better quality with small tolerance,by platinum tip.Company InformationFAQAny problem,pls give me email or by skype:glasspack1 whatsapp:8615275109050