There are not separate efficiencies for longitudinal and circumferential. This seems to be an invention of Mr. Schueler's which does not exist in the Code. This is the primary reason I advised ignoring this posting.
There are separate formulas for longitudinal [clause UG-27(c)(1)] and...
NO. I said I've never heard of "equivalent longitudinal efficiency". Thus I have no opinion on how, or even why, anyone would calculate it.
My only advice would be to follow the Code rather than a 20 year old Q&A posting. If the Code is not clear to you I'd suggest asking your supervisor how...
I've been designing pressure vessels for 30+ years and have seen the name Robert Schueler many times, so I know he's very knowledgeable, but I can't make much sense of his answer. I've never heard of "equivalent longitudinal efficiency'. Thus I only tried to give information I know, and...
At 250 tons and 110 ft diameter that's 26 psf. A standard 3/16" steel deck is only 8 psf. What does your IFR look like to be so heavy?
Next, 26 psf is only 5" (125 mm) water column. How did you arrive at 12" (300 mm) WC? A more reasonable weight will reduce this pressure even further.
Air...
Not sure where you're reading this. Let me take a guess, and if I'm on the wrong track ask a follow-up question with the specific sentence or formula.
With a simple free-body diagram you can figure out the basic thin-plate membrane forces. The load in the hoop direction of a cylinder, which...
Are you able to contact the engineer who did the Ontario stamping? Perhaps they have, or would be willing to get, an Alberta stamp. It's relatively easy to get a stamp in another province once you're registered somewhere in Canada.
Which code are you asking about? I will assume Section VIII Division 1.
For carbon steel low temp operation is covered by UCS-65 thru UCS-68. Basically, if you can find a steel mill that can produce the carbon steel with the Code required impact tests it's permitted. I have many vessels in...
API 650 Clause 1.1.1 states : This standard establishes minimum requirements for material, design, fabrication, erection, and inspection for vertical, cylindrical, aboveground, closed- and open-top, welded storage tanks ...
Your tank is not cylindrical, and thus cannot be API 650.
I'm afraid that I'm one who insists on a space between the value and the unit. I would use a non-breaking space when the program may re-flow the text.
Most of the world should follow BIPM SI Brochure 9th Edition (2019) clause 5.4.3, which can be found here ...
Based on the zero information you've given, my answer is "make it stronger".
Applicable code, vessel size, saddle dimensions, which check is failing, etc, etc, etc ??? Sketches or drawings are always best.
In API 650 a flanged bottom in only permitted on an Annex J shop assembled tank. However your tank is quite small so shop assembly might be possible.
Assuming EN 14015 is similar to API 650, you could check your copy to see if there's something similar to Annex J.
I have been licensed in five or six of the provinces over the years. I seem to remember they all have something to say about this, but they are quite varied. I suspect the more recent the revision to their guidelines the closer they read like this NSPE statement.
I would advise looking up the...
