Dechocking of impeller and replacing corroded impeller refixing of loosened impeller of pumps

To describe a standard operating procedure for dechocking of impeller & replacing corroded impeller/refixing of loosened impeller of pumps.
The standard operating procedure describes in detail the method of dechocking of impeller & replacing corroded impeller/refixing of loosened impeller of pumps in the plant.
The responsibility of dechocking of impeller & replacing corroded impeller/refixing of loosened impeller of pumps lies with the staff of rank not lower than supervisor of maintenance department.
Refixing of Loosened Impeller Of Pumps,Replacing Corroded Impelle, Engineering