Why are the NMISC = {14,34,54,74} results for a plastic elbow (PIPE60) and elastic elbow (PIPE18) pipe so drastically different? The stresses are far below yield so they should match.
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Defect 72433 was filed, and it is clear that PIPE60 is producing some very odd results, partly due to the geometry of the elbow and some ASME Code formulas; for example, the PIPE60 does not degenerate to a straight pipe when a large major radius is used. PIPE60 is being replaced by the new pipe elbow PIPE290, so the problem is going to be documented not fixed. |
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