Borosilicate Glass Tube

Descripción del producto

high borosilicate glass tube: size: from ****5mm, and the tubes of *7, *7, *8, *0 for the solar water heater. the high borosilicate glass tube enjoys good heat-proof, anti-rot, mechanical capacity, high working temperature, good technical quality and the favourable price. Main composition: 1) SiO2: *0±0.5% 2) B2O3: *3±0.2% 3) Al2O3: 2.4±0.2% 4) Na2O(+K2O): 4.3±0.2% Chemical properties: 1) Coefficient of mean linear thermal expansion (*0°C/**0°C): 3.3±0.1 (***6K*1) 2) Transformation temperature: **5±*5°C 3) Working point: 1, **0±*0°C 4) Softening point: **0±*0°C 5) Density at *0°C: 2.*3g/cm 6) Hydrolytic resistance at *8°C: ISO***-HGB1 7) Hydrolytic resistance at **1°C: ISO***-HGA1 Usage: A) It is well material for labware, B) solar evacuated collector tube, C) handicraft and D) other high grade glassware usage.