Borosilicate Glass Tube

Borosilicate Glass Tube is engineered for high thermal shock resistance, low thermal expansion (~3.3–4.3 × 10⁻⁶/°C), and excellent chemical durability, derived from its silica-boron oxide composition. Its stability under rapid temperature changes and resistance to corrosive chemicals make it indispensable in laboratory, pharmaceutical, and renewable energy sectors. Common uses include heat collector envelopes in concentrated solar power systems, precision tubing for medicament containers, and structural components in low-pressure discharge lamps. Specific technologies benefiting from borosilicate glass tubes include photothermal power generation assemblies, photomultiplier housings, and specialized optical conduits. Research continues to refine its composition to enhance UV–NIR transparency, mechanical strength, and environmental safety by eliminating hazardous refining agents. Its combination of durability, optical clarity, and adaptability ensures borosilicate glass tubes remain a critical material in both advanced scientific instrumentation and industrial energy systems.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Tube

Outside Diameter	=<2mm	±0.05mm
Outside Diameter	2mm - 5mm	±0.1mm
Outside Diameter	>5mm	±5%
Wall Thickness		±10%

Material Properties for Glasses

Chemical Resistance

Element	Value
Acids - concentrated	0
Acids - dilute	0
Alkalis	0
Halogens	0
Metals	0

Electrical Properties

Element	Value
Dielectric constant	0
Dielectric strength( kV mm⁻¹ )	0
Volume resistivity( Ohmcm )	0

Mechanical Properties

Element	Value
Poisson's ratio	0
Tensile modulus( GPa )	0
Hardness - Knoop( kgf mm⁻² )	0
Hardness - Vickers( kgf mm⁻² )	0
Shear strength( MPa )	0
Tensile strength( MPa )	0
Fracture toughness( MPam(0.5) )	0

Physical Properties

Element	Value
Refractive index	0
Useful optical transmission range	0
Apparent porosity( % )	0
Water absorption - saturation( % )	0
Density( gcm⁻³ )	2.23

Thermal Properties

Element	Value
Melting point( C )	0
Sublimation point( C )	0
Upper continuous use temperature( C )	0
Specific heat( J K⁻¹ kg⁻¹ )	0
Thermal conductivity( W m⁻¹ K⁻¹ )	0
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	0