BS EN 14175 is a European standard that outlines safety and performance requirements for fume cupboards, which are used in laboratories to contain hazardous fumes, gases, or vapours. This standard is crucial for ensuring that fume cupboards are designed, constructed, and tested to provide effective containment and protection for laboratory personnel.
The standard is divided into several parts, focusing on different aspects of fume cupboard performance, including:
- BS EN 14175-1: Vocabulary, defining key terms.
- BS EN 14175-2: Safety and performance requirements.
- BS EN 14175-3: Type test methods for measuring the containment effectiveness of fume cupboards.
- BS EN 14175-4: On-site test methods to ensure proper function after installation.
- BS EN 14175-6: Special provisions for variable air volume fume cupboards.
The standard addresses ventilation, airflow, and containment efficiency, ensuring that the fume cupboard effectively protects against harmful airborne contaminants. Specific tests, such as the “Inner Plane Test” and “Outer Plane Test,” are conducted to measure how well the cupboard contains hazardous substances under different conditions​
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Compliance with BS EN 14175 is critical for laboratory safety and is regularly required for equipment to meet regulations like COSHH (Control of Substances Hazardous to Health) in the UK.
The key components of a fume cupboard as outlined by the BS EN 14175 standard include:
- Sash: The adjustable front opening, often made from safety glass, allows users to access the cupboard while minimizing exposure to fumes. The sash’s position is crucial for controlling airflow.
- Exhaust System: This includes a fan and ducting that directs harmful substances out of the laboratory. If external venting is not feasible, recirculation systems using filters may be used.
- Work Chamber: A chemically resistant chamber where hazardous materials are processed. The construction materials must be able to withstand corrosive substances typically used in laboratories.
- Airflow and Ventilation: The cupboard must provide sufficient airflow to contain fumes effectively. The airflow is typically drawn in through the opening (sash) and directed through the exhaust system. The standard specifies that the cupboard should maintain an optimal face velocity to prevent fume escape.
- Face Velocity Measurement: A critical aspect of safety, face velocity refers to the speed at which air enters the cupboard. The BS EN 14175 standard requires testing of airflow to ensure proper containment and safe working conditions.
- Containment Tests: These include the Inner Plane Test (measuring fume escape inside the cupboard) and the Outer Plane Test (measuring fume escape around the opening), both of which ensure effective fume containment​Clean Air​Clean Air​Axair Fans.
These components work together to ensure that the fume cupboard provides both personal and environmental protection when handling hazardous substances.
