this was recently proposed to me;
For Div 1 vessels UG-23 (e) was recently changed to allow higher stresses in the range 2 x Sy, where Sy/UTS < 0.7, as in our case here. The same change was made to Div 2. While setting a limit of 3 x S would generally be ok I’ve often referred to this new clause in lieu of performing additional FEA. I don’t know if we will ever see these higher allowable stresses reported in design programs such as Compress or PVElite.
=> This seems to fly in the face of discontinuity and local stress rules.
=>any comments greatly appreciated.
+are any other members using this?
+is it accepted by the jurisdictions (design registration- yes i know they dont look at noz loads but there are many other potential applications)
thx

Dear urgeo,

Both PVElite and CodeCalc are using this section of the code where it is called for e.g. UHX, cone-cylinder junction. One exception at this time is WRC-107.

If you satisfy the conditions listed in UG-23(e) and if the material is not in the creep range then you can use 2*Sy.