Let us today consider commissioning “norms”.
“Norms” are typical normal durations it takes for the commissioning team to perform certain activities so it enables the scheduling to be more accurate. Please note these durations are based on my experience and not any industry standard, but the times I state will not be far off…
- Systemizing P&ID’s and other engineering drawings – 1 hour per drawing
- Check out of systemized drawings to ensure the boundaries are correct and the full check out of P&ID’s for commissionability – 50 P&ID’s per day
- Drafting of a commissioning procedure – 1 procedure per day (some will take half and hour some will take 3 days!).
- Punchlisting, per system – 1 day (again this is the average, some systems will take 2 hours some 3 days!)
- Leak testing – 1, 12 hour day
- Water commissioning – 1 day per procedure
- If commissioning is involved with loop testing – 1 loop test per hour
- Check out of a DCS sequenced control system – 0-5 steps in sequence ½ day, complicated sequences greater than 20 steps 3 days
- Process commissioning per system – on average 3 weeks
I hope my guidance on normal durations has been of help to your planning.
For those who are US based, enjoy the Labour Day Holiday!
Safe and successful commissioning always…