Overview
ISO 3585:1998 specifies the main characteristics of borosilicate glass 3.3, focusing on its physical and chemical properties relevant to its use in laboratory glassware, glass plant, pipelines, and fittings. This international standard facilitates consistency and quality in the selection and identification of borosilicate glass 3.3 for scientific and industrial applications. Glass characterized by this standard is known for its excellent thermal and chemical resistance, making it highly suitable for demanding environments where precision and durability are essential.
Key Topics
- Physical Properties: The standard outlines nominal values for important properties such as density, coefficient of mean linear thermal expansion, viscosity, thermal conductivity, specific heat capacity, elastic modulus, Poisson's ratio, and ultimate tensile strength.
- Chemical Resistance: Borosilicate glass 3.3 exhibits high resistance to hydrolytic attack at both 98°C and 121°C, acid resistance, and alkali resistance, making it ideal for use with aggressive substances.
- Thermal Stability: The glass is designed to perform reliably within a nominal temperature range of 20°C to 300°C, with specified transformation and softening temperatures.
- Mechanical Strength: The standard provides guidance on tensile strength and factors influencing mechanical reliability, indicating the importance of manufacturing quality and surface finish.
- Testing Methods: It references standardized methods, ensuring reliable and repeatable assessment of both physical and chemical properties.
Applications
Borosilicate glass 3.3, as defined by ISO 3585:1998, is widely used in:
- Laboratory Glassware: Beakers, flasks, and test tubes benefit from the high chemical and thermal stability of borosilicate glass, ensuring safety and reliability in chemical analyses and experiments.
- Industrial Glass Plant: Pipelines and fittings in chemical processing plants utilize borosilicate glass 3.3 for transporting and handling corrosive or high-temperature substances.
- Process Equipment: Its resistance to thermal shock and chemical attack makes it suitable for sensors, reaction vessels, and other critical glass components in both research and production environments.
- Scientific Instrumentation: The properties detailed in ISO 3585 support the design of precise measurement and observation tools requiring stable material performance.
Using glass that conforms to ISO 3585:1998 ensures compatibility, safety, and interchangeability of components in both new installations and maintenance operations.
Related Standards
Organizations and professionals referring to ISO 3585:1998 often use related standards for further specification and testing, including:
- ISO 695 - Glass - Resistance to attack by a boiling aqueous solution of mixed alkali - Method of test and classification
- ISO 719 - Glass - Hydrolytic resistance at 98°C - Method of test and classification
- ISO 720 - Glass - Hydrolytic resistance at 121°C - Method of test and classification
- ISO 1776 - Resistance to attack by hydrochloric acid at 100°C
- ISO 7884 series - Viscosity and viscometric fixed points
- ISO 7991 - Determination of coefficient of mean linear thermal expansion
- ISO 3586, ISO 3587, ISO 3819, ISO 4704, ISO 4797, ISO 4803 - Additional specifications for glass plant components, laboratory glassware (beakers, flasks, tubing), and handling guidelines
Consulting these international standards helps ensure compliance, performance, and safety when selecting and utilizing borosilicate glass 3.3 in various scientific and industrial applications.
