Am running an analysis for a new line which will connect to older lines and existing/new equipment (tank and heat exchangers). Although the manual I have discusses evaluation by CII of nozzle loading in accordance with HEI, I cannot find this option on the nozzle screen. Perhaps it's a version issue. Are there general guidelines for maximum allowable loads at a heat exchanger nozzle imposed by the piping system? If things are the same as I remember them (haven't done this work for +10 years), I would expect the vendors to say either their equipment is so strong that the pipe would fail first, or that the allowable loads are zero, either of which is no help at all.

Rod

Rod,

The HX's are pressure vessels and the CAESAR II WRC 107 routine is the way to go. You mention "tanks" (?). Tanks are atmospheric pressure (or very slightly above) storage equipment. I suspect the "tanks" are also pressure vessels and WRC 107 will apply here also.

Regards, John.

Thanks, John!

Just had another thought - does it improve the model if the HX is modeled as a series of rigid elements, starting at the HX supports?

Equipment nozzle modelling in CAESAR II
Please refer section 6-8 , 6-9, 6-10 and 6-11, 6-12, 6-13 of Caesar II application guide. It appears that there are two different methods of equipment nozzle flange modelling for vertical vessels and horizontal vessels.
1)vertical vessel and horizontal nozzle flange :- Nozzle neck modelled as pipe and flange modelled as rigid with weight.
2)Horizontal vessel and vertical nozzle flange :- Nozzle neck modelled as pipe and flange modelled as rigid with zero weight.
Can anybody throw some light on this modelling please?

Best regards

Mahesh

Dear Rod

i think that WRC 107 can be used here