Div 2 - Internal Support Attachment Methodology
Div 2 - Internal Support Attachment Methodology
(OP)
Hi All,
We are designing our first Div 2 vessel after many Div 1 vessels over the past few years. My question is when it comes to internal support structures for say a demister pad or tower tray how do you approach this? As i understand Div.1 allows you to use generally acceptable rules to prove the design of such items however Div.2 from reading seems to point you directly to design by analysis (Part 5, FEA).
Do you have any room to move when it comes to this items to use the standard calcs from say PVElite to design internal supports? It would be an expensive exercise to design these most probably lightly loaded components using FEA when we can design the rest of the pressure components for far less work in PVElite / NozzlePRO.
We are designing our first Div 2 vessel after many Div 1 vessels over the past few years. My question is when it comes to internal support structures for say a demister pad or tower tray how do you approach this? As i understand Div.1 allows you to use generally acceptable rules to prove the design of such items however Div.2 from reading seems to point you directly to design by analysis (Part 5, FEA).
Do you have any room to move when it comes to this items to use the standard calcs from say PVElite to design internal supports? It would be an expensive exercise to design these most probably lightly loaded components using FEA when we can design the rest of the pressure components for far less work in PVElite / NozzlePRO.





RE: Div 2 - Internal Support Attachment Methodology
RE: Div 2 - Internal Support Attachment Methodology
Probably through my lack of experience with div.2 :D.
para 4.15.5.2 in Div.2 gives the options for lugs which i took as being applicable to a support bracket to hold a demister element. This then points to either Part 5 or WRC or another 'analytical method'.
If you dont mind me asking , what calculation methodology would you use for say a support ring in a Div.2 vessel? I thought the whole point of Div.2 was that you either design with the rules provided, which check against stress intensity allowables or you opt for numerical analysis and check against the same criteria. The formula im use to working with in Div.1 of course only summarise in an allowable stresses , or do i simply re-use them and look at things from a membrane and bending stress perspective.
Thanks again. Im sure it will eventually be clear.
RE: Div 2 - Internal Support Attachment Methodology