Evaluating a lifting lug located in 2:1 head
Evaluating a lifting lug located in 2:1 head
(OP)
Hello,
I'm currently evaluating a pressure vessel design.
Most relatively small pressure vessels in the refinery, usually have two lifting lugs welded directly to the 2:1 elliptical head.
If these accessories were welded to vessel shell, WRC-107 would be applicable, in order to evaluate vessel stresses due to the connection while the equipment is being moved from one place to another.
However, I fear this is not the case if the lug is located on the 2:1 head, due to it being eccentric to the vessel longitudinal axis.
I believe a commercial FEA software will be required, in order to check the vessel stresses per Div. 2. Ansys will provide the stresses combination, but these would have to be linearised. Since I have no experience with this analysis, I would very much like to avoid it. PV Elite won't let me put lifting lugs on the vessel head either. I would appreciate any input...
Another solution could be moving the lifting lugs from the vessel head to the shell. WRC-107 should suffice in this case, if I'm not wrong. Forgive my lack of experience.
Thank you
I'm currently evaluating a pressure vessel design.
Most relatively small pressure vessels in the refinery, usually have two lifting lugs welded directly to the 2:1 elliptical head.
If these accessories were welded to vessel shell, WRC-107 would be applicable, in order to evaluate vessel stresses due to the connection while the equipment is being moved from one place to another.
However, I fear this is not the case if the lug is located on the 2:1 head, due to it being eccentric to the vessel longitudinal axis.
I believe a commercial FEA software will be required, in order to check the vessel stresses per Div. 2. Ansys will provide the stresses combination, but these would have to be linearised. Since I have no experience with this analysis, I would very much like to avoid it. PV Elite won't let me put lifting lugs on the vessel head either. I would appreciate any input...
Another solution could be moving the lifting lugs from the vessel head to the shell. WRC-107 should suffice in this case, if I'm not wrong. Forgive my lack of experience.
Thank you





RE: Evaluating a lifting lug located in 2:1 head
Only two lifting lugs? Why not 4?
RE: Evaluating a lifting lug located in 2:1 head
http://www.networkintl.com/contents%2Fauction%2FQF...
MJCronin
Sr. Process Engineer
RE: Evaluating a lifting lug located in 2:1 head
PV inside diameter: 950 mm
PV outside diameter: 980 mm
Total height: About 3584 mm
PV axis: Vertical
There are some similar vessels in the refinery, with only 2 lifting lugs attached directly to the vessel 2:1 shell, eccentric to the axis. That's why we're aiming for only two lifting lugs.
Thank you MJCronin for the link. I'll be checking it out carefully today.
RE: Evaluating a lifting lug located in 2:1 head
FEA is unnecessary for this vessel.
Regards
r6155