Tubes and capillaries made of borosilicate glass 3.3
Product specifications: Tubes and capillaries
Material: Borosilicate glass 3.3
You can find more information about the glass in our info data sheet.
Borosilicate tube 3.3 is required wherever visual inspection of processes in pipelines must be guaranteed under pressure, thermal and chemical stress.
The high level of safety is achieved by using a special borosilicate glass with good chemical resistance, exceptional purity and homogeneity. The low thermal expansion typical of this borosilicate glass results in a particularly high thermal shock resistance.
Production and quality checks in the process sequence guarantee the property values of the glasses and the tight dimensional tolerances. Tensile, compressive and torsional forces must be avoided under all circumstances.
Operating conditions:
Temperature: 300 °C / 572 °F
Pressure: depending on diameter and thickness
Calculation of the pressure resistance: TOOL - Glass consultant borosilicate glass tubes
Technical information:
Coefficient of expansion at 20 °C / 300 °C (68 °F / 572 °F): 3.3 x 10–6 K–¹
Young's modulus: 64 x 10³ N/mm²
Thermal conductivity at 20 to 100 °C: 1.2 W/(m·K)
Stress-optical coefficient K: 4.0 x 10–6 mm²/N
Thermal shock resistance: 303 ... 115 °C (depending on the wall thickness of the pipe)
Chemical resistance:
Water resistance DIN ISO 719/720: Hydrolysis class 1
Acid resistance DIN 12116: Acid class 1
Alkali resistance DIN 52332: Alkali class 2
