Meaning of "reinforcement"
Meaning of "reinforcement"
(OP)
Very stupid question: in ASME VIII Div.1, what is the real meaning of "reinforcement" for opening in pressure vessel? Does it mean pads or include also nozzles, for example pipes?
In UG-36(3) it's written "the centerline of an unreinforced opening". Does it mean a simply hole or include also the nozzle? thanks
In UG-36(3) it's written "the centerline of an unreinforced opening". Does it mean a simply hole or include also the nozzle? thanks





RE: Meaning of "reinforcement"
RE: Meaning of "reinforcement"
RE: Meaning of "reinforcement"
UG(36)(c)(3) states "the centerline of an unreinforced opening as defined in (-a) and (-b)..."
(-a) states "...with a finished opening not larger than..."
-(b) states "threaded, studded, or expanded connections in which the hole cut in the shell or head is not greater than 2-3/8" Diameter"
(-b) is straight forward....hole cut.
(-a) refers to a finished opening....a finished opening is explained in UG-36(c)(1) and defined in UG-37 as d.
At least I think this is what you are asking.
RE: Meaning of "reinforcement"
The available reinforcement area is any metal area available for compensation per UG-37 rules: may be in vessel wall, in nozzle wall, in welds, in a reinforcing element (generally called a reinforcement pad).
UG-37 is quite clear and simple on the point.
Unreinforced openings per UG-36(c)(3) are those openings that, by code rules, do not require to check the available reinforcement against the required one; in other words it may be said that their required reinforcement is zero.
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: Meaning of "reinforcement"
After you run out of extra metal for reinforcing/compensation in shell, nozzle, pipe, couplings, weld metal, then you move to pads.