Containment Safety of Turbocharger at Reduced Engine Load

A reduced engine load is very often concurrent with a normal operation mode (e.g. slow steaming or auxiliary engine) and is often accompanied by a turbocharger rotating speed which is lower than the specified maximum speed. In the rare case of a rotor failure, at such a reduced engine load, the resulting internal forces can be absorbed by the turbocharger in its original delivery condition without any further modification.

MAN Energy Solutions has performed tests at reduced turbocharger rotational speeds. As a result, we can confirm to all operators and users that the specific turbocharger is containment safe at a reduced engine load. The rpm which is stated on the specific webpage of each turbocharger type indicates the maximum revolution up to which the turbocharger is confirmed as containment safe in case of the unlikely event of a rotor damage. If the turbocharger is operated above the indicated confirmed rpm speed, please follow the safety instructions given in the ASB for the duration of operation at this rpm speed.

The actual engine load corresponding to this confirmed safe rotating speed of the turbocharger may vary depending on engine type, engine application and turbocharger layout. The general operation and maintenance of the turbocharger should always be conducted in accordance with the operating manual.