It is clear to me that API 12F is a pre-engineered standard. It is unclear to me however what the testing requirements are. The standard says to test to 1.5x the design pressure. The design pressure is listed as 16 oz/in^2 or 1 psi. The tank will clearly see 6.5 psi just due to static fluid...
One of the processes consists of a gas (ie Argon) flowing thru a nozzle at pressure. The purpose is shielding/piercing gas for a CNC machine. The gas comes from a bulk storage tank, which I am sizing. The tank starts at 2200psi and slowly declines to 100psi. Here is what I get?
I assumed a...
Quark
I appreciate the feedback, however something seems off with the units.
If I multiply the following I get:
(100psi + 14.7psi) x 10ft^3/HR = 165,168 lb-ft/hr
Not 1147ft^3/hr? As you suggested.
Can you have another look at this? Am I missing something?
Everyone else is also welcome to...
I am interested in calculating the duration of flowing gas (nitrogen, argon, or air) from storage tanks (cylinders, receivers, etc). The purpose is to determine if the demand can be met without changing the tank every day.
For example, I have a tank of compressed nitrogen at 2000psi, that has...
I am evaluating a demo of NEiNastran right now and am pleased so far with what I have accomplished with it. It seems very capable.
I am considering also buying Ansys, likely strucutral depending on the dollar amounts. I am a previous user of Ansys (version 4.1 and 5.3) and did some interesting...
In Canada (my area anyway) the big ones are Bulter, Steelway, and Robertson. The structures are all relatively the same. Make sure that you get a seamed standing seam roof. Butler AFAIK started this system many (30+) years ago. The process involves the panels overlapping and then getting rolled...
I agree with Ron that there will be some partial rotational restraint at the joint. However I would NEVER count on it in the design. I would consider this "gravy" on my design. The horizontal thrust at the shear key can only develop if the lower section is restrained from spreading (or is...
The question is really what is the bolt spacing with respect to the angle capacity.
For example:
1) 1/2" thick angle may be able to tranfer the load of the grating based on 4' centers of the bolts.
2) 1/4" thick angle may be able to transfer the load of the grating based on 2'-6" centers of the...
The basic design assumptions for this type of support are to design as a cantilever beam. The outstanding leg of the angle must resist the downward reaction from the grating. The anchorage to the wall is also a primary consideration.
Issues to be aware of are where the actual load is placed on...
In this case I would say that the curved "beam" should be modelled as a pin on one side and a roller on the other. This is a classic design case for that type of structure. If however the lower half of the clam was fully restrained by the earth or foundations etc an arguement could possibly be...
I think I would calculate the J value using the perimeter of the tube only. In that sense you are really only ignoring the vertical webs which likey would contribute little anyway. The formula for an open tube with different flange and sidewall thicknesses is in any standard mechanics of solids...
New development.
In AutoCAD there is a system variable called splinetype. If the variable is set as '5' you get a perfect parabola, if it is set as '6', you get a cubic spline (not a parabola). Somehow my variable got reset. Now in AutoCAD I get exactly the same answer.
Stan
Thanks guys for the help.
I was able to calculate the station elevations and determine the camber at midspan after going thru my survey books. I did not use the 'E' in my calcs but got the same number for camber, so looks good. By my calcs the camber is 2.05' which as noted above matches the...
Thanks
By sketching the curve in ACAD with a quadratic spline (parabola) I figured the height of the curve above the Level end points to be about 37" or so. The difference in elevation between the end points and the center intersection of the tnagents is 49.2". So I don't think the E value is...
