Opening in CONE
Opening in CONE
(OP)
Hi,
This is regarding the opening in the lower half of the cone, my cone dimensions are as follows.
Larger ID : 2901 mm
Smaller ID : 97.2 mm
Thickness of Cone : 19 mm
Overall length : 1400 mm
Now we have to do the WRC calculation of the nozzle which is attached on the lower opening.
As per my understanding there is no provision in ASME Sec VIII Div.2 or Div. 2 for such kind of opening.
So what we have done is, in COMPRESS we have attached a Forged shell on the lower half of the cone and then we have attached the nozzle pipe to the forged shell.
We have to avoid Part 5 analysis. Can anyone suggest some views ..?
This is regarding the opening in the lower half of the cone, my cone dimensions are as follows.
Larger ID : 2901 mm
Smaller ID : 97.2 mm
Thickness of Cone : 19 mm
Overall length : 1400 mm
Now we have to do the WRC calculation of the nozzle which is attached on the lower opening.
As per my understanding there is no provision in ASME Sec VIII Div.2 or Div. 2 for such kind of opening.
So what we have done is, in COMPRESS we have attached a Forged shell on the lower half of the cone and then we have attached the nozzle pipe to the forged shell.
We have to avoid Part 5 analysis. Can anyone suggest some views ..?





RE: Opening in CONE
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http://www.xcalcs.com : Online engineering calculations
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RE: Opening in CONE
RE: Opening in CONE
You're stuck here - if this is a Div. 1 vessel, then U-2(g). Do the Div. 2, Part 5 analysis.
RE: Opening in CONE
Once you have the stresses you would combine and use them just the same way you would have done with WRC 107.
Not also that it shouldn't be difficult to demonstrate that, when those stresses are acceptable for the nozzle neck at the smaller end, they must also be acceptable in the cone, as the diameter and thickness go increasing.
Of course this assumes you are not required to estimate the secondary (discontinuity) stresses at the pipe to cone junction. I don't think those may be evaluated without FEM for external moments. However secondary stresses need not be considered under Div.1, but of course you'll need to get an agreement with the person approving your calculations on this point.
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