UG-28
UG-28
(OP)
Intermediate semi ellipsoidal head also acts as a stiffener when making external pressure calculations as per UG-28, is it correct?
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN





RE: UG-28
Cheers,
gr2vessels
RE: UG-28
prex
http://www.xcalcs.com : Online engineering calculations
http://www.megamag.it : Magnetic brakes and launchers for fun rides
http://www.levitans.com : Air bearing pads
RE: UG-28
Now, again the same question when designing the shell against external pressure would intermediate head be considered as a stiffner? so that unstiffened length L may be reduced accordingly.
One more question, if the intermediate head is flat unstayed head (of UG-34), would this head be considered as stiffener?
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN
RE: UG-28
prex
http://www.xcalcs.com : Online engineering calculations
http://www.megamag.it : Magnetic brakes and launchers for fun rides
http://www.levitans.com : Air bearing pads
RE: UG-28
If yes, then there might be a problem, as a stiffener per UG-29 is not subject to any other stress than the one related to its stiffening function.
prex
http://www.xcalcs.com : Online engineering calculations
http://www.megamag.it : Magnetic brakes and launchers for fun rides
http://www.levitans.com : Air bearing pads
RE: UG-28
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN
RE: UG-28
The fact that a flat head per UG-34 is a line of support, though this case is not explicitly treated by UG-28, is a matter of evidence: the flat head must of course resist the external pressure, thus it prevents the shell from buckling.
Now if the intermediate head is also subject to the external pressure, then it must be capable of withstanding it, and it is also preventing the shell from buckling: it is therefore a line of support.
prex
http://www.xcalcs.com : Online engineering calculations
http://www.megamag.it : Magnetic brakes and launchers for fun rides
http://www.levitans.com : Air bearing pads