OD:4~315mm Large thick Wall thickness:4~10mm Top:fire polished/cut neat/anneal Heat resistant,acid/alkali resistant COE:3.3

We have our own furance for the production of those glass tubes, we can customize the specifications to the customers' demand, and the delivery time will be very short.

Our glass tubes can keep high brightness for longer time than other glass, and looks more transparent due to the borosilicate material.The outer diameter is 4~315mm, wall thickness is 1.0~10mm, and the length below 3m

The material is high borosilicate 3.3. And the working temperature is 450-500C. Borosilicate 3.3 series glass is a kind of special type glass material with the features of low 

expansion coefficient,high temperature resistance,high intensity, high rigidity, transparency 

and chemical stability. It doesn't explode in high temperature, and can be forged and drawn 

to variety of formation when soften. All these splendid features enable it to be widely used in the field of solar energy,chemical 

industry, pharmaceutical packaging, electric light source,artificial crystal, artificial craft 

decoration and so on.Compared with ordinary glass. It's non poisonous, and it has made

 the big progress in its mechanical property, thermal stability, hydrolytic resistance.acid 

resistance and alkali resistance glass High borosilicate glass products: We can provide a full range of borosilicate glass products, such as borosilicate tube, 

glass rods Glass tube OD from 4mm~315mm Glass rods dia from 3~42mm Glass tubes wall thickness: 1.0mm~10mm Technical data for glass tube Main composition:1) SiO2: 80+/-0.5% 2) B2O3: 13+/- 0.2% 3) Al2O3: 2.4+/- 0.2% 4) Na2O: 4.3 0.2% 

Chemical properties: 1) Coefficient of mean linear thermal expansion (20 C/300 C):3.3 0.1 (10-6K-1) 2) Transformation temperature: 525 +/-15 C 3) Working point: 1, 260+/- 20 C 4) Softening point: 820 +/-10 C 5) Density at 20 C: 2.23G/cm 6) Hydrolytic resistance at 98 C: ISO719-HGB1 7) Hydrolytic resistance at 121 C: ISO720-HGA1

8) Acid resistance class: ISO1776-1

9)Alkali resistance class: ISO695-A2

Applications: superior heat resisting products and crafts,Rod suit for

Super quality architectural lamps;tube applicable to chemical instrument,

chemical tube and handicrafts;raw material for vacuum tubes,article of daily necessities.

Large heavy wall high borosilicate glass tube