How to calculate head plastic buckling pressure during the hydro test
How to calculate head plastic buckling pressure during the hydro test
(OP)
I need a formula to calculate the plastic buckling pressure for a torispherical and an ellipsoidal heads.
What is ECCS formula for this plastic buckling pressure ?
What is ECCS formula for this plastic buckling pressure ?





RE: How to calculate head plastic buckling pressure during the hydro test
Steve Braune
Tank Industry Consultants
www.tankindustry.com
RE: How to calculate head plastic buckling pressure during the hydro test
ECCS is European Convention for Constructional Steelwork and published the following document:
- "Buckling of Steel Shells, European Recommendations", 1988.
I need calcute the stress during hidro test for an ASME vessel. The formulas of ASME code (Addenda 2003), for torisherical heads, overestimate stress in this condition.
RE: How to calculate head plastic buckling pressure during the hydro test
It makes quite a memorable sound when it goes, too [as in "what the #$%%#@ was that?"].
We had one once on a "non-code" [as in "it doesn't have to be engineered, it's less than 15psi"] tank with shallow, thin ends ("to save $$"). The shop boys were leak testing the pipes, with city pressure in/ a partly open ball valve on the outlet for back pressure. A loud Boinnngggg resounded throughout the shop. The tank knuckle-buckle looked just like the picture in Harvey. Funny how the immutable laws of physics hold true, even when managers hold a meeting & decide they don't apply. "Get out the fender tools, boys!!"
RE: How to calculate head plastic buckling pressure during the hydro test
The pressure vessel design book by H Bednar has a formula for calculating the collaps pressure in dished ends.
Bogu