dished end with small convex
dished end with small convex
(OP)
Hello
How to calculate a dished end with small convex? ratio H/D=0,12(H-height of end, D-diameter of end). I can't find any formulas covering this type of dished ends.
Thank you for any help.
Andy
How to calculate a dished end with small convex? ratio H/D=0,12(H-height of end, D-diameter of end). I can't find any formulas covering this type of dished ends.
Thank you for any help.
Andy





RE: dished end with small convex
RE: dished end with small convex
Andy
RE: dished end with small convex
ASME VIII, Div 1, Appendix 1 has design formulas for torispherical heads of various proportions. In UG-32 the standard ASME Torispherical head has a dish radius that is 100% of the vessel diameter. The knuckle radius is 6% of the vessel diameter. This gives an H/D ratio of about 0.17, so clearly your vessel head is even flatter than that. I was not aware that there were any veseel codes that permitted shallower heads than that. My impression was that the euro codes did not allow heads as shallow as the ASME Codes.
Joe Tank
RE: dished end with small convex
Andy
RE: dished end with small convex
Regards,
Mike
RE: dished end with small convex
prex
http://www.xcalcs.com
Online tools for structural design
RE: dished end with small convex
regards
Andy
RE: dished end with small convex
Andy
RE: dished end with small convex
http://www.bakertankhead.com/products.htm
Regards,
Mike
RE: dished end with small convex
Part of engineering judgment is knowing when something doesn't need engineering, although that's kind of hard to get across sometimes.
RE: dished end with small convex
It needs it in this case.
Regards,
Mike
RE: dished end with small convex
I can't calculate this as a flat head, thickness is too big.
RE: dished end with small convex
Have you tried calculating as a sphere of whatever your dish radius is?
Not clear what code you're working to, but ASME Sec VIII Div 1 also has a formula for dish only heads in Appendix 1-6
Regards,
Mike
RE: dished end with small convex
RE: dished end with small convex