I saw Endress+Hauser corriolis meters used for 10barg steam application and I couldn't see a worse situation than what I saw(pipeline vibration, hot ambience and leaking steam near by the meter etc.) I checked the past records and the meters were working perfectly.
I personally feel that corriolis meters are overkill for steam application(in terms of money). You can go with density compensated vortexes for steam and turbines for condensate.
Regards,