Thanks all.
In this particular case, the loading is largely from internal pressure (no bending, low temperature etc.). So it would be more conservative to apply the DF for hoop stress (vs combined loading). But is that over-conservative...? Of course, all good if it passes with the former...
Hi all
Performing a FEA assessment of pipeline defects (girth weld metal loss) to API 579.
(p.s. what the defects actually are & whether a FEA was warranted etc. are all valid concerns but not the topic for this thread!)
Starting with API 579, Section 5 (general metal loss) leads you to Annex...
Hi LittleInch
Yes, its on a straight section at 12 o'clock position. Defect found after some years of operation; it doesn't pass the analytical checks & hence FEA to take a closer look. Not believed to be a serious issue but require some analysis to back it up. Also the reason why the soil...
Thanks all. Given the pipeline response within the soil is not the focus, am trying to keep it as simple as I can (time being the other issue!). So the soil load as a pressure could be a good & quick way to do it. Would this apply around the whole circumference? Or top half only...
Note...
Hi all
Am modelling an onshore pipeline which is buried to about 2m. Objective is to assess a weld defect & confirm if stresses are within allowable. So only modelling a small section (~5m) in 3D around the girth weld. I want to include the soil load but am not sure how best to do this; the...
