Posted by: sam
Piping Stress Workinghour Estimation - 08/08/06 10:26 AM
I perform piping stress workinghour estimation this way:
2 nodes per straight span, 3 nodes per elbow,
1 node per mitre cut, 2 nodes per fitting like valve/flange etc & for each 150 nodes 10 hours for detailed piping stress analysis.
Which way our forum members do this ?
regards,
sam
Posted by: S
Re: Piping Stress Workinghour Estimation - 08/09/06 12:31 AM
Hello sam ,
Good Morning.
I would like to know the basis on which you have devised such a plan.
Have you done some kind of test?
I feel it doesnt just depend on the modelling alone.
Posted by: sam
Re: Piping Stress Workinghour Estimation - 08/09/06 02:28 AM
You are right, checking is imperative indeed.
This estimation is based on certain assumptions:
1) Piping stress isos will have probable support positions marked
2) Pipe Spec, branch table, insulation thk table, valve weights, P&ID, line designation table available
3) Piping stress analysts are skilled & motivated enough
4) It is a statistical estimate. One size may not fit all. It requires adjustment based on feedback in actual workplace.
regards,
sam
Posted by: SAMAbdul
Re: Piping Stress Workinghour Estimation - 08/09/06 08:21 AM
How about complexity of the calculation? high temp, rotating equipment connections, complex expansion joint modeling....
Posted by: sam
Re: Piping Stress Workinghour Estimation - 08/09/06 10:10 AM
Engineers need to work in an ethical manner; so, if complexity requires additional time, the same has to be reported in feedback and estimates should be revised for future applications.
regards,
sam