SIF

I m getting the message in Warning "30 the fitting has a D/t ratio greater than 100. SIF computations for this fitting may be inval" even after i activated the Brach Flexibility. How to avoid this warning.

Use heavier schedule pipe!

What do you think D/t ratio is????? Its the OD / t read the online help and the code instead of simply typing questions in this forum do some independent study and learning!

Hi john, using heavier schedule pipe is ok..but for 2020 dia pipe with 0.08kscg...10 thick is more enough....i activated the Brach Flexibility..but i m getting the warning message as "the fitting has a D/t ratio greater than 100. SIF computations for this fitting may be inval" pls...give me a solution..how to avoid this warning message

From B31.3-2006, Table D300, Note 1:



So, if you take your pipe outer diameter, and divide it by your pipe wall thickness the result is the D/t ratio. This value must be less than 100 to avoid the warning.

Hi Moorthi,
just make a search a find this topic "Satisfying D/T ratio for Large diameter fittin "
Regards
Yani

Richards reply gives the details from the code. The error in caesar is due to the code requirements.
Further to that when the D/t ratio is greater than 100 calculate the SIF for the branch connetion in FEPIPE or Nozzlepro and input the same in your caesar input.