Beijing Kaixingda Industry Technology Development Co., Ltd.
Main products:Drilling Rig,Water Well Drilling Rig,DTH Hammer,Glass Tube,Molybdenum Wire
Products
Contact Us
  • Contact Person : Mr. jia jeff
  • Company Name : Beijing Kaixingda Industry Technology Development Co., Ltd.
  • Tel : 86-10-67562712
  • Fax : 86-10-67562693
  • Address : Beijing,beijing,NO.15 MAJIAPU,FENGTAI DISTRICT
  • Country/Region : China
  • Zip : 100068

borosilicate glass tubes (guaranteed quality)

borosilicate glass tubes (guaranteed quality)
Product Detailed
borosilicate glass tubes (guaranteed quality) 1).Dimension: 3mm-320mm 2).large in stock

borosilicate glass tubes (guaranteed quality)     

 OD: 3-320mm, and the tubes of 37, 47, 58, 70 for the solar water heater.

Main composition:

1) SiO2: 80±0.5%

2) B2O3: 13±0.2%

3) Al2O3: 2.4±0.2%

4) Na2O(+K2O): 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) Softening point   820±10°C

3) Density at 20°C   2.23g/cm2

4) Maximum working temperature    short term(<10h)   500°C    long term(>10h)  450°C

5) water resistance   ISO719/DIN12111         HGB1 ISO720                  HGA1]

6) Acid resistance    ISO1776/DIN12116        1 7) Alkali               ISO695/DIN52322         A2

8) Thermal conductivity cal/cm·s°C   0.0028

9) Resistivity lgρ(25°C)   15

10) Thermal shockv resistance ΔT°C  230

11) specific heat capacity(0-100°C)0.195cal/g

borosilicate glass tubes (guaranteed quality)

Other products


Copyright Notice @ 2008-2012 ECVERY Limited and/or its subsidiaries and licensors. All rights reserved.