Machine Risk Assessment in the Context of the Machinery Directive 2006/42/EC
In a rapidly evolving technological landscape with the emergence of new types of machines and equipment, ensuring compliance with the requirements of the Machinery Directive 2006/42/EC based on relevant standards is a complex task. A key element in such cases is the execution of a complete risk assessment process in accordance with the methodology described in standard PN-EN ISO 12100.
Key Stages of Risk Assessment
The primary step in risk assessment is hazard analysis. This involves identifying potential hazardous scenarios across various categories of hazards, such as:
- Mechanical
- Electrical
- Thermal
- Noise-related
- Vibration-related
- Radiation-related
- Caused by materials and substances
- Resulting from non-compliance with ergonomic principles
- Arising from the environment in which the machine is used
- Combinations of hazards
Hazard analysis enables the anticipation of potential emergency scenarios (cause >> >> enabling factors >> consequence), which may not be apparent during the design phase. Each event is assigned a category based on the severity of likely consequences—ranging from negligible to fatal—and the statistical frequency of occurrence.
Risk Reduction
After assessing the risk—determined by the combination of consequence severity and frequency of occurrence—it is essential to reduce that risk. This is achieved using recognized methods aligned with best engineering practices and applicable standards, such as:
- PN-EN 60204 – for electrical installations
- PN-EN ISO 13850 – for emergency stop functions
- PN-EN 13857 – for safe distances from hazardous parts
- Other standards as required
Mitigating Measures
The application of appropriate risk reduction measures may influence:
- The severity of potential consequences
- The duration of human exposure to hazardous machine operations
- The ability to avoid the hazard at the moment of occurrence
- The statistical frequency of hazardous events
Required Competencies
Conducting machine risk assessments requires not only analytical skills but also in-depth knowledge of machine construction and their systems, including electrical, hydraulic, and pneumatic components. A solid understanding of the relevant standards and specifications used in risk analysis is also essential.