How can I search for a all the node points that exceed a particular stress value?
After running an analysis, select Results> Filter
This is a very powerful capability for isolating only the results you need. Example, using Result >Filter criteria/Support, you can generate a report which only shows that supports which exceed 7,000 lb. Vertical load, or have pipe deflections at the support point which exceed 5" in the X, 1" in the Y, or 4" in the Z. Result filters not only save lots of time, they prevent errors from slipping through the cracks. Result filters can be combined with graphical select (Example: output report contains only the points in the graphically selected range which exceed user defined deflection criteria).
You can also use the Result >Filter criteria to satisfy a flange analysis, often engineers want to evaluate highly loaded flanges e.g. flanges with stress > 7000 psi. Define the filter criteria as: Select Result/Filter criteria/Code stress, code stress option = checked, greater than 7000. Click OK will highlight all points meeting this criterion. Clear the selection set then Select/ flanges then Result output report, check both options "Limit results to highlighted points" & Apply Filter Criteria (Result >Filter) to create a flange report with stresses > 7000psi.
HINT: Familiarize yourself with this useful capability.