What are the typical areas of application for pipes and capillaries made of borosilicate glass 3.3?
These pipes and capillaries are particularly resistant to chemical and thermal stresses and allow for visual inspection of processes in pressurized pipelines. Due to the low coefficient of thermal expansion, borosilicate glass 3.3 offers high temperature cycling resistance and is suitable for applications up to 300 °C.
Specifications for pipes and capillaries made of Borosilicate glass 3.3
Product specification: Pipes and capillaries
Material: Borosilicate glass 3.3
Further information about the glass can be found in our info data sheet.
Borosilicate tube 3.3 is required wherever under pressure, with thermal and chemical stress, the visual inspection of processes in pipelines must be ensured.
The high safety is achieved by a special borosilicate glass with good chemical resistance, extraordinary purity and homogeneity. The typical low thermal expansion of this borosilicate glass results in a particularly high thermal shock resistance.
Through production and quality checks in the process, the property values of the glasses and the tight dimensional tolerances are guaranteed. Tensile, compressive, and torsional forces must be avoided under all circumstances.
Operating conditions:
Temperature: 300 °C permanent
Pressure: dependent on diameter and thickness
Calculation of pressure resistance: TOOL - Glass advisor pipes made of Borosilicate glass
Technical Information:
Coefficient of expansion at 20 °C/300 °C: 3.3 × 10⁻⁶ K⁻¹
Modulus of elasticity: 64 x 10³ N/mm²
Thermal conductivity at 20 ... 100 °C: 1.2 W/(m·K)
Stress-optical coefficient K: 4.0 x 10–6 mm²/N
Temperature change 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
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