Hi all,

I want to do a nozzle load check according to EN-13445 chapter 16. The PVElite loads/moments box however adds loads that act on the centerline of the vessel and I can't find an other add loads option. So I have two questions:
- is it possible to perform a check according to EN-13445 chapter 16?
- if so: how do I enter the nozzle loads in PVElite?

Thanks in advance for your replies.

No one who knows if it is even possible?

Hello Corne

When considering nozzle loads, they can only be computed in accordance with WRC 107 or PD 5500. Section 16 is roughly based upon PD 5500, although not exactly so. When entering the loads (forces and moments), they are local to the nozzle. I am not sure what you mean by: 'The PVElite loads/moments box however adds loads that act on the centerline'. Perhaps you could elaborate.

Ray,
thanks for your reply.
What I meant is that there is an option in PVElite to add forces and moments to a vessel, but that those will be added on the centerline of the vessel, and thus work on the complete vessel. Therefor this option can't be used to input nozzle forces for calculations like WRC/PD5500/EN-13445 chapter 16.

I know the option to calculate nozzle forces with WRC107/PD5500, but as EN-13445 is featured as a code too, I thought maybe chapter 16 was incorporated in PVElite somehow too. Apperently it isn't.

Hello Corne

The simple answer is no. You have to add the forces separately to the vessel.

Any chance this will get incorporated in PVElite / CodeCalc someday?

Dear Corne,

An ideal option would be to have a check box to transfer the local nozzle loads from the nozzle to the vessel. So, only if that box is checked will the loads be transferred to the vessel. Some times the loads are just "standard" nozzle loads from a table and not real loads. Their purpose is to be just insure that the nozzle is strong enough and really to design the vessel support for those loads.

If you have real actual piping loads then you would want to transfer that to the vessel.

What do you think?

I think we have some misunderstanding here.
EN-13445 chapter 16 concerns local stresses due to nozzle loads, and doesn't concern forces acting on the complete vessel. Two topics are crossing each other here:

- EN-13445 chapter 16 is not incorporated in PVElite/CodeCalc, where WRC and PD5500 are. Is there a change EN-13445 chapter 16 gets incorporated?

- secondly it would indeed be nice if it was possible to add forces on a flange, and that PVElite automatically calculated both local flange stresses and transferred these forces to the main vessel itself too.