BS EN 149 is a European standard for respiratory protective devices, specifically focusing on filtering facepiece respirators (FFRs). It provides requirements and test methods for the design, performance, marking, and use of these devices to protect against particulate hazards in the workplace. Here are the key details of BS EN 149:
1. Scope
- The standard applies to filtering facepiece respirators (FFRs) designed to protect the wearer from inhaling harmful airborne particles.
- It is primarily concerned with devices that are used for protection against particles such as dust, fumes, and aerosols.
2. Categories of Respirators
BS EN 149 classifies respirators into three classes based on their filtration efficiency:
- FFP1: Provides a filtration efficiency of at least 80%. These are intended for environments with low toxicity.
- FFP2: Provides a filtration efficiency of at least 94%. Suitable for more hazardous environments.
- FFP3: Provides a filtration efficiency of at least 99%. These offer the highest level of protection against airborne particles.
3. Performance Requirements
The standard outlines specific performance criteria, including:
- Filtration efficiency: The device must meet the required filtration level for its class (80%, 94%, or 99%).
- Total inward leakage (TIL): The respirator must ensure that no more than a specified percentage of external particles leak into the device.
- Breathing resistance: The resistance to airflow through the filter material should be low enough to allow easy breathing while wearing the respirator.
- Compatibility with other equipment: The respirator should be compatible with other personal protective equipment, like eye protection.
4. Testing Methods
The standard specifies the following tests to assess the respirator’s performance:
- Particle filtration efficiency: A test to measure how well the respirator filters particles.
- Leakage tests: These tests check the tightness of the respirator against the face.
- Breathing resistance: Tests to measure the ease of breathing while using the respirator.
- Condensation: A test to check the condensation resistance in different conditions.
5. Marking Requirements
All respirators certified under BS EN 149 must be marked with:
- The manufacturer’s name and address.
- The product type and class (FFP1, FFP2, or FFP3).
- A CE mark, indicating conformity with European health, safety, and environmental protection standards.
- The year of manufacture.
- Additional information such as expiration dates, if applicable.
6. Additional Considerations
- User Instructions: Clear instructions on how to properly use and maintain the respirator.
- Maintenance and Storage: Respirators are usually designed for single-use, but some models can be reusable, requiring proper maintenance and cleaning.
- Fit Testing: Although not a part of the standard itself, fit testing is often recommended to ensure the respirator fits the wearer correctly.
BS EN 149 is part of a broader set of regulations and standards for personal protective equipment (PPE), ensuring that respiratory devices provide effective protection against harmful airborne particles while being comfortable and practical for the wearer.
