ROTORDYNAMICS STANDARDS - NEW DEVELOPMENTS AND THE NEED FOR INVOLVEMENT

The paper reports recent developments in international standards which are particularly pertinent to manufacturers and operators of rotating machinery. In particular it discusses standards relating to balancing , especially flexible shafts, and acceptable vibration levels for rota ting machinery. In the area of balancing the report is very opportune because, following an unanimous international ballot at the Draft Inte rnational Standard (DIS) stage, a new standard ISO 11342, 'Mechanical vibration-methods and criteria for the mechanical balancing of flexibl e rotors', has just been published. Nevertheless, despite publication of this new standard, ISO 11342, work is already under way on a major revision in which the classification of rotors will be completely chan ged.