Equipment Changeovers

Please define "changeover".

The factors to be consider for Equipment change over.

Ex : Two Pumps -- One is running and other stand by.

Whether both pumps should have equal running hours after certain years

as I have the define the Changeover procedure, i need the details like this.

I suggest you operate your equipment based on the manufacturers recommended duty cycles. If this is continuous, rotate the duty based on recommended preventive maintenance scheduling. Longevity is another matter and is directly affected by your particular process.

Well dear it depends on various factorsss...First case if its a cooling tower pumps it depends on the fact how long it filters perform..Like choking.Once u see the discharge pressure (Or head) reaching the shut-off head (Or trip point in process) you can change it over..Second if its in process it depends on the fact you plant engineering team has ordered from the vendor..You can review the vendors technical braocher for more details.

Also you can check out PM team how they want to rate the equipment as ..something very critical needs to be run to failure etc etc...and secondly you can run the equipment till u find the largw flucuations in perfromance parameters...

Since feild is very wide..it emcopess condition monitoring etc ..

The main consideration is the availability of the standby pump to perform when called upon to do so. This means that while it is not running it needs to be checked regularly to ensure that it is in good working condition.

You must ensure that the bearings remain lubricated, that there is no bowing of the shaft, seals do not stick, product does not solidify, no Brinelling of bearings etc etc.

How you achieve this depends on the pump, the duty, the lubrication system, atmospheric conditions etc.

You can run and switch over at fixed periods. This ensures that both pumps age at the same speed which I have never thought to be an ideal way to do things, but it is very easy to implemet so has some redeeming features.

You can switch over for a shorter period, say run for a month, switch over for a week, switch over and run for a month etc.

You can run one pump continuously and either turn the standby pump by hand or bump it or run for a few minutes in parallel to ensure lubrication, no seal leaks, no vibration etc then shut it down and leave the running pump running.

You choose, no two specialists ever seem to agree on this one. The one thing that we do know is that the standby pump is the important one to monitor and maintain as it MUST work when called upon.