Borosilicate 3.3 Glass Tube /Pyrex Pipes for Linghting Glass Shade

• Customization: Available
• Color: Transparent
• Certification: ISO9001
• Model NO.: 70614
• Cup Accessories: without Handle
• Application: Chemistry
• Type: Glass Tube
• Glass Type: Glass Tube
• Materails: Borosilciate 3.3 Glass
• Coe: 3.3*10-6
• Temperature: Heat Resisitant
• Shock: Shock Resistant
• Transport Package: Carton
• Specification: OD1.8mm --- OD400mm
• Trademark: Honhai
• Origin: China
• Production Capacity: 200000kg/Day

Product Description

Product Description

High borosilicate 3.3 glass tube

Borosilicate 3.3 glass is a widely used special heat-resistant glass material with a thermal expansion coefficient of only 3.3×10-6/K. It features outstanding thermal stability and chemical inertness. The tube body is completely transparent without bubbles or striae, which makes it a superior alternative to ordinary soda-lime glass for high-temperature and acid-base corrosive working environments.

Core Advantages

Excellent thermal shock resistance: Resist sudden temperature change up to 150°C without cracking
Ultra-high light transmittance: Superior transmission for visible and ultraviolet light, free of impurities and dark spots
Outstanding chemical resistance: Resistant to acids, alkalis and organic solvents, no harmful substance precipitation
Ultra-low thermal expansion: Stable dimension under high temperature conditions
Good mechanical performance: Thick-wall versions own strong compression & impact resistance; deep processing services including flange forming, polishing, frosted cutting are available

Physical data of COE 3.3 borosilicate glass tube

No.	Physics Performance	Numerical Value	Unit
1	Medium coefficient of linear expansion α20/300 acc.To DIN 52328	3.3 ± 0.1	10-6 K-1
2	Transformation Temperature	525 ± 15	degree Celsius
3	Upper annealing temperature	560 ± 10	degree Celsius
4	Softening point	820 ± 10	degree Celsius
5	Working temperature	1260 ± 20	degree Celsius
6	Maximum short-time working temperature	500	degree Celsius
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(20 degree Celsius -100 degree Celsius )	1.2	W/m2K
11	Temperature for the specific electrical resistance of 108Ω·cm(DIN52326)tk 100	250	degree Celsius
12	Stress-optical constant(DIN52314)K	4.0	10-6mm2/N

Chemical data of COE 3.3 borosilicate glass tube:

Composition	SiO2	B2O3	Na2O + K2O	Al2O3
approx.weight %	81	13	4	2

high borosilicate 3.3 glass tube
Description	Rate
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

Main Application Fields

Laboratory equipment: Glass reactors, test tubes, distillation columns, measuring cylinders
Industrial sight glass: Boiler sight cylinder, pipeline flow observation tube, chemical reaction kettle viewport
Lighting & optics: High-temperature lamp housing, UV light protective sleeve
Medical & pharmaceutical: Sterile glass packaging, laboratory sampling tubes
Household & new energy: Heat-resistant glass containers, battery observation casings