welcome OEM/ODM orders grade 1 quality Specifications
borosilicate glass tube 1.application: medical use 2.size:OD from 4mm to 315mm
Borosilicate glass tube, glass tube, borosilicate 3.3 glass tube,
1. Borosilicate glass tube2.OD from 4mm to 315mm3.Wall thickness from 0.5mm to 10mm4.Shape: round,
5. Different wall thickness available
composition:
1) SiO2: 80±0.5%
2) B2O2: 13± 0.2%
3) Al2O3: 2.4±0.2%
4) Na2O (+K2O): 4.3±0.2%
Chemical properties:
1) Coefficient of mean linear thermal expansion (20°C/300°C): 3.3±0.1 (10-6K-1)
2) Transformation temperature: 525±15°C3)
Working point: 1,260±20°C4)
Softening point: 820±10°C5)
Density at 20°C: 2.23g/cm²6)
Hydrolytic resistance at 98°C: ISO719-HGB17)
Hydrolytic resistance at 121°C: ISO720-HGA18)
Acid resistance class: ISO1776-1 9)
Alkali resistance class: ISO695-A2
Packing: Export cartons on fumigated wooden pallet
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low borosilicate glass tube
