ISO 20816

Definition of ISO 20816

ISO 20816 defines an international standard for measuring and evaluating machine vibrations, replacing the predecessor standard ISO 10816 and introducing expanded assessment criteria for various machine types in industrial manufacturing environments.

Normative Foundations

The ISO 20816 series structures vibration evaluation in a detailed manner:

• Part 1: General guidelines for all machine types.
• Part 2: Systematically addresses land-based turbines and generators.
• Part 3: Classifies industrial machines by specific characteristics.
• Part 4: Focuses on gas turbine units.
• Additional Parts: Methodically cover specialized machine categories.

Assessment Parameters

The standard specifies enhanced criteria for precise condition assessment:

• Broadband Vibrations: RMS values of vibration velocity.
• Shaft Relative Vibrations: Displacement of rotating components.
• Bearing Vibration Temperatures: Correlation with vibration behavior.
• Machine Foundations: Differentiation by foundation types.
• Operating Conditions: Consideration of varying operational states.

Measurement Methods and Techniques

Standard-compliant vibration measurement requires defined procedures:

• Measurement Points: Positioned at specified machine components.
• Sensor Technology: Selected based on measurement type and range.
• Frequency Ranges: Defined according to machine characteristics.
• Data Collection: Conducted under specified operating conditions.
• Data Evaluation: Assessed per standardized criteria.

Integration Aspects

ISO 20816 forms the basis for modern condition monitoring:

• Online Monitoring Systems: Configured per standard specifications.
• Alarm Thresholds: Set based on standardized evaluation zones.
• Trend Analysis: Implemented for long-term condition assessment.
• Diagnostic Functions: Integrated per standard recommendations.
• Documentation Structures: Established for compliance records.

Consistent application of ISO 20816 standards in industrial monitoring systems enables objective, reproducible machine condition assessment, supporting data-driven maintenance decisions to enhance equipment availability and process safety.