Dears,

In NozzlePro, a nozzle local load calc for external forces & moments shows failure.

If I put P=0, it is OK with allowable stress derated - by Smh in primary check & by Smavg in primary & secondary checks. Is this approach right ? Is pressure here having anything to do with pressure thrust ?

In WRC107, is no Pr thrust inclusion same as putting zero value for pressure?

From the viewpoint of reliability, I consider this type of allowable derating subjective in nature & better to avoid.
What do you all think about it ?

regards,

sam