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How to calculate head plastic buckling pressure during the hydro test
- Thread starter acbdcl
- Start date
That subject has been addressed in a WRC Bulletin. I suggest you go to their website and track down the bulletin number. What is ECCS?
Steve Braune
Tank Industry Consultants
Steve Braune
Tank Industry Consultants
- Thread starter
- #3
Steve
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.
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.
Harvey's "Pressure Component Construction" Ch. 2.6.4 has a section on this. Basically, if axis ratio a/b > 1.42, this can be a problem.
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 $$"
. The shop boys were leak testing the pipes, with city pressure in/ a partly open ball valve on the outlet for back pressure. A loud Boinnngggg resounded throughout the shop. The tank knuckle-buckle looked just like the picture in Harvey. Funny how the immutable laws of physics hold true, even when managers hold a meeting & decide they don't apply. "Get out the fender tools, boys!!" ;-)
It makes quite a memorable sound when it goes, too [as in "what the #$%%#@ was that?"].
We had one once on a "non-code" [as in "it doesn't have to be engineered, it's less than 15psi"] tank with shallow, thin ends ("to save $$"
. 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!!" ;-)- Status
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