Gas Turbine Vibration Evaluation Evidence Worksheet
Organize applicability, measurement and source evidence for qualified review against ISO 20816-4:2018. This worksheet checks documentation completeness and public scope only; it does not calculate a vibration zone, diagnosis, alarm, trip setpoint, acceptance result or operating instruction.
Evaluation-evidence record
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Standard and source register
| ID | Source and lifecycle | Verified public support | Not supported publicly |
|---|---|---|---|
| S1 | ISO 20816-4:2018 Edition 1 – published – confirmed at stage 90.93 | Land-based, fluid-film-bearing, power and speed scope; nine exclusions; eligible measurement positions/directions; steady, transient and change contexts; predecessor lifecycle. | Closed numerical zones, exact bands, amplitude conventions, change criteria, boundary rules, protection setpoints and operating-limit procedure. |
| S2 | ISO 20816-2:2017 với Amendment 1:2024 Published and current official records | Route for land-based gas turbines above 40 MW with fluid-film bearings at rated speeds 1 500, 1 800, 3 000 or 3 600 r/min; amendment lifecycle. | No authorization to apply Part 2 criteria to a Part 4 machine, or to reproduce protected criteria. |
| S3 | ISO 10816-4:2009 Edition 2 and Amendment 1:2017 withdrawn; revised by ISO 20816-4:2018 | The predecessor lifecycle and former non-rotating-part scope. | No proof that former numerical values, criteria or actions are unchanged in ISO 20816-4:2018. |
Review notes
Why does this page no longer output Zone A, B, C or D?
The former six configurations lacked a checked licensed ISO 20816-4:2018 clause/table, complete applicability and measurement conditions, and a verified boundary convention. Three of those configurations were explicitly outside the public scope. A numeric zone would therefore be unsupported.
Does ISO 20816-4 cover aero-derivative gas turbines?
No. The official current abstract explicitly excludes aero-derivatives and gas turbines with similar dynamic properties because materially different criteria apply.
Does ISO 20816-4 cover small turbines or rolling-element bearings?
No generic rule is provided here. The official current abstract excludes gas turbines at or below 3 MW and rolling-element-bearing vibration from this part.
Can a bearing-housing velocity or shaft-displacement value alone establish a safe alarm or trip?
No. Applicability, position, direction, quantity, amplitude convention, band, processing, operating state, trend, licensed criteria, OEM/site limits and protection philosophy must all be controlled.
Can this worksheet recommend continued operation, maintenance or shutdown?
No. It only checks whether a documentation package is complete enough for licensed external evaluation by an accountable qualified reviewer.
Source access: 17 July 2026. No closed ISO clause, amendment text, table, coefficient or zone boundary is copied or inferred. The former automatic classifications and protection advice were removed because their current normative basis and complete application conditions were not verified.
