Multi Color Borosilicate Glass Tube

Product Item：OV-015

Material: Borosilicate Glass 3.3

Colour: transparent or translucent

Use:smoke pipe and others

Size: Various

Description

Borosilicate Glass Tube is a type of glass with silica and boron trioxide as the main glass-forming constituents. Borosilicate glass tubes are known for having very low coefficients of thermal expansion (3.3 × 10−6 K−1 at 20 °C), making them more resistant to thermal shock than any other common glass.

Physical Data of 3.3 Borosilicate GlassTube

No.	Physics Performance	Numerical Value	Unit
1	Medium coefficient of linear expansion α20/300 acc.To DIN 52328	3.3 ± 0.1	10-6K^-1
2	Transformation Temperature	525 ± 15	Deg.C
3	Upper annealing temperature	560 ± 10	Deg.C
4	Softening point	820 ± 10	Deg.C
5	Max Working temperature	400± 20	Deg.C
6	Maximum short-time working temperature	500	Deg.C
7	20 degree Celsius Density ρ	2.23 ± 0.02	g/cm³
8	Modulus of elasticity E	64	103 N/mm²
9	Poisson's ratio	0.20	1
10	Thermal productivity(20Deg.C-100Deg.C)	1.2	W/m²K
11	Temperature for the specific electrical resistance of 108Ω·cm(DIN52326)tk 100	250	Deg.C
12	Stress-optical constant(DIN52314)K	4.0	10-6mm²/N

Chemical Data of 3.3 Borosilicate GlassTube

Composition	SiO2	B2O3	Na2O + K2O	Al2O3
approx.weight %	81	13	4	2
Water resistance to ISO720	1
Water resistance to European Pharmacopoeia	1
Water resistance to USP23	1
Acid resistance Class(DIN12116)	1
Alkali resistance Class(ISO695)	2