There are many types of preventive and corrective maintenance.
Breakdown maintenance:
Break Down Maintenance means that people waits until equipment fails and repair it.
Preventive maintenance:
Preventive maintenance is a daily or routine maintenance ( cleaning, inspection, oiling and re-tightening ). This practice helps to retain the healthy condition of equipment and prevent failure through the prevention of deterioration, periodic inspection or equipment condition diagnosis, to measure deterioration.
It is further divided into periodic maintenance and predictive maintenance.
Just like human life is extended by preventive medicine, the equipment service life can be prolonged by doing preventive maintenance.
Periodic maintenance ( Time based maintenance – TBM):
Periodic maintenance or time based maintenance consists of periodically inspecting, servicing and cleaning equipment and replacing parts to prevent sudden failure and process problems
Predictive maintenance:
This is a method in which the service life of important part is predicted based on inspection or diagnosis, in order to use the parts to the limit of their service life. Compared to periodic maintenance, predictive maintenance is condition based maintenance. It manages trend values, by measuring and analyzing data about deterioration.
Condition Monitoring:
Condition monitoring is the process of determining the condition of machinery while in operation. The key to a successful condition monitoring program includes:
1. Knowing what to listen for
2. How to interpret it
3. When to put this knowledge to use
Successfully using this program enables the repair of problem components prior to their failure. Condition monitoring not only helps plant personnel reduce the possibility of catastrophic failure, but also allows them to order parts in advance, schedule manpower, and plan other repairs during the downtime.
Corrective maintenance:
Corrective maintenance improves equipment and its components so that preventive maintenance can be carried out reliably. Equipment with design weakness must be redesigned to improve reliability or improving maintainability.
1. Purpose The purpose of this procedure is to ensure that all corrective and preventive maintenance activities are carried out as per applicable international best practices in order to achieve maximum customer satisfaction with minimum adverse impact on environment, health and safety of both employees and end users, operators and community.…