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Borosilicate Glass tubing
Borosilicate Glass tubing
Supplier Info
[China Supplier]
Contact Person : Mr. Chai Slyvia
Tel : 86-531-81180905
Fax : 86-531-88033316
Product Detail
Borosilicate Glass tubing borosilicate glass tubes are widely used in the laboratories, chemical factories

 

Physical data  Borosilicate Glass tubing

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 1Hydrolytic resistance at 121ºC         ISO720-HGB 1water resistance                       Grade 1              Test method: ISO1776Acid resistant Class                   Grade 1              Test method: ISO1776

Borosilicate Glass tubing

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