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  3. Tubular Sight Glass
  4. Borosilicate Glass Tube
  • Borosilicate Glass Tube
  • Borosilicate Glass Tube
  • Borosilicate Glass Tube
Borosilicate Glass Tube Borosilicate Glass Tube Borosilicate Glass Tube

Borosilicate Glass Tube

  • Product Item:OV-011
  • Material: Borosilicate Glass 3.3
  • Colour: transparent
  • Use:observe liquid level
  • Size: Various
  • Inquiry Send Email

    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. Borosilicate glass tube is usually used in tubular level gauge for high temperature and pressure resistance, which is also known as tubular gauge glass, pyrex glass tube.

    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

    Working temperature

    260 ± 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





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