3 M.W Steam turbine Vibration Limits required

Your first resource should be the manufacturer, then perhaps any insurance company that might be involved, then the applicable ISO standard which likely will be based on measurement method (casing or proximity probes).

For instance, ISO 10816 Part 3 is titled "Industrial machines with nominal power above 15 kW and nominal speeds between 120 and 15 000 rpm when measured in situ."

 

same as john ask OEM, or use a normative applicable in your country, such as ISO10816-3 for your turbine 3MW is group 1 and likely flexible suports 7.1 and 11.0 mm/s rms you're measuring mm/s peak, to use the standar limits your data must be rms,

depending on how CSI obtain the overall vibration from spectrum or from waveform you could multiply peak by 0.707 to obtain rms.

In my opinion, is useless or non practical to measure displacement of casing vibration, you're already trending velocity with spectrums, then you do dobule work for the same information

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