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Quick Details

  • Place of Origin: Hebei, China (Mainland)
  • Brand Name: bright pearl
  • Model Number: redline
  • color: red and white
  • Shape: Tubular
  • Material: Borosilicate Glass Tube
  • Density: 2.23±0.02
  • Outer diameter: 20mm-200mm
  • Length: 100mm--2000mm

Packaging & Delivery

Packaging Details Each packed with bubble bag, then put into carton box. Customized packaging are welcome.
Delivery Time within 7-14 days after receiving advance payment


Redline gauge glass


Redline tubular gage glass has a red line between two white lines which, in the presence of a colorless liquid, magnifies the red line.  The bold red line makes it easier to read the liquid level. 


Redline tubular gage glass is widely used in tanks, reservoirs and low pressure boiler applications.


Material: borosilicate glass





O.D.1/2" ±0, -1/32

Wall 5/64"±1/64"Length 8-72


O.D.5/8" ±0, 1/32

Wall 3-32" ±1/64"Length 8-72


O.D. 3/4" ±0, 1/32

Wall 7/64" ±1/64"Length 8-72


O.D. 1" ±0, 1/32

Wall 1/8" ±1/64"Length 8-72


Technical Data of the High Borosilicate Glass:

1. Chemical composition:

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



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China (Mainland) | Trading Company
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45 Transactions 20,000+
The supplier’s transactions conducted via Alibaba.com in the past 6 months.
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Supplier's Trade Assurance Limit: US $87,000
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