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High borosilicate glass products,We can provide a full range of borosilicate glass products, such as borosilicate tube, glass rods Glass tube ,solar collector
OD from 10mm~315mm
Glass rods dia from 3~80mm
Glass wall thickness: 1.4mm~22mm
Technical data for glass tube
Main composition:1) SiO2: 80± 0.5%
2) B2O3: 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° C
3) Working point: 1, 260± 20° C
4) Softening point: 820± 10° C
5) Density at 20° C: 2.23G/cm
6) Hydrolytic resistance at 98° C: ISO719-HGB1
7) Hydrolytic resistance at 121° C: ISO720-HGA1
