Criticality defination for stress analysis Level-I

Anon. #1

Please use the "Search" box on the right side of the screen and type in:

"Pipe stress analysis criteria"

Read all you find there and you will have your answer.

PennPiper,

I have searched the answers posted by you ,It doesn;t say anything about pipe size for the lines connecting to Rotating machinery & static equipments,

My question is 2" & below pipe sizes connecting to Rotating machinery & static equipments need to do a rigourous (comprensive) analysis i.e. Stress category -1 or Level -I calculation.If you see API-610 it gives published allowable loads for 2" pump nozzle size but have seen some companies they do Level-I analysis for 2" pump nozzle connecting lines?what is criterion to decide on size if the line connecting to pump/vessel

You asked: "what is the criterion to decide on size if the line connecting to pump/vessel?"

The criteria is that the line is connected to a pump. It does not matter what the size is, it is connected to a pump. What do you not understand.

That pump is more important and if lost is more costly (in replacement and lost productivity) than an hour or so of the stress engineers time.

Question is not about Analysis ,whether it can be done as level-I analysis ,because less than 2" pumps can be done by chart methods also i.e. level 2 or manual method,which is also a analysis type

Regards,

Rajesh