0086-0769-86737650
Shangdong Industrial Area, Qishi Town, Dongguan, Guangdong, China (Mainland)
Technical Data of the High Borosilicate Glass:
1. Chemical composition:
SiO2>78%
B2O3>10%
2. Physical and Chemical Properties:
Coefficient of expansion | (3.3±0.1)×10-6/°C |
Density | 2.23±0.02 |
Water resistant | Grade 1 |
Acid resistance | Grade 1 |
Alkaline resistance | Grade 2 |
Softening point | 820±10°C |
Thermal shock performance | ≥125 |
Maximum working temperature | 450°C |
Tempered max. working temperature | 650°C |
3. Main Technical Parameters:
Melting point | 1680°C |
Forming temperature | 1260°C |
Softening temperature | 830°C |
Annealing temperature | 560°C |
We supply borosilicate glass tubes in many different sizes, outside diameter from 20mm to 200mm, wall thickness from 1mm to 5mm 
Borosilicate glass tube,outside diameter 230 MM, height 110 MM, thickness 4 MM.
Dongguan Ruifeng glass Products Co., Ltd. is located in Dongguan, Guangdong province, China. Our company covers an area of 3000 square meters. We are mainly engaged in developing and producing high boron silicon glass tubes and many kinds of glass prodcts. Such as glass jars, spice jars, pepper jars,oil and vinegar bottles, glass tubes for lamp, lad glass test tubes, glass rods, glass pipes, glass vases, glass balls, glass candle holders, etc.
We sincerely welcome everyone in different roles to visit and instruct us. Our professional technology, high quality product and the best service will be your optimum choice.
If you're interested in our product, please don't hesitate to contact us.
