| Pump Power / Speed | Zone A/B Boundary (mm/s) | Zone B/C Boundary (mm/s) | Zone C/D Boundary (mm/s) | |--------------------|--------------------------|--------------------------|--------------------------| | > 1 kW to 300 kW | 1.8 | 4.5 | 7.1 | | > 300 kW | 2.8 | 7.1 | 11.0 |
It outlines the exact placement of vibration sensors (accelerometers) on the pump housing. Incorrect sensor placement can lead to false positives or missed faults. 3. Legal and Regulatory Compliance
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ISO 10816-7:2009 (and its later integration into ISO 20816-7) provides criteria for assessing the vibration levels of pumps when measurements are taken on the bearing housings or pedestals. It is widely used in industrial maintenance to ensure pump reliability and prevent catastrophic failure. The standard defines two main vibration criteria:
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If you cannot access the PDF, consider these industry equivalents: | Pump Power / Speed | Zone A/B
Like most parts of the ISO 10816 framework, Part 7 utilizes a color-coded or lettered classification system to define the health of the pump based on broadband vibration velocity (measured in mm/s RMS).
Structures (like skids or steel mezzanines) where the support system flexes or has a natural frequency close to or below the operating speed. Pumps on flexible foundations are generally allowed slightly higher vibration limits because the structure absorbs and amplifies some of the energy without necessarily damaging the pump internals. 3. Operating Conditions Matter
: General-purpose industrial pumps processing non-hazardous fluids (e.g., standard water distribution systems). Vibration Severity Zones Legal and Regulatory Compliance : Corporate or university
Boiler feed pumps in power plants, large crude oil pipeline pumps, and heavy-duty petrochemical process pumps.
Setting operational limits for acceptance testing and operational monitoring. Pump Categorization Under the Standard
This category includes pumps where high reliability is paramount, or pumps with high power ratings (typically above 200 kW). Examples include boiler feed pumps, main crude oil pipeline pumps, and large cooling water pumps. Because of their operational impact, Category I pumps have lower (stricter) allowable vibration limits.
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