I'm using ASME Specification STS-1a-2003 to create a MathCad sheet for steel stack design. In section 4.4.5 of the specification, the reader is presented with equations for required minimums for moment of inertia, area and section modulus of the composite section comprised of a portion of the...
For an API-650 tank, designed to 0.3 psig internal pressure, a 24" roof manway exists with a 1/4" thick cover plate (as seen in Fig. 5-16 of API-650). Inserted into this cover plate, is an 8" (XS) vent nozzle. I cannot find in API-650 a section regarding 'reinforcing of opening in cover plates...
Referencing API-650, 11th Ed., Addendum 1, Table J-1(b) lists the 'Maximum Roof Depths for Shop Assembled Dome Roof Tanks'. J.3.5.3 indicates this table is specifically the maximum roof depth for a dome or umbrella roof that has a straight flange to allow for butt-welding of the head to the top...
I'm posting this in the API-650 forum, as the question pertains to steel storage tank design. I may post under AISC (Steel Construction) if others feel that is a more appropriate forum.
Consider a large steel storage tank with a conical roof that is self-supported with the aid of externally...
Addendum 1 of API-650 11th Edition includes a new equation (g) in Appendix R. This equation combines the dead, live and external pressure loads attributed to an internal floating roof (IFR) to the dead, live and ext. pressure loads acting on the fixed roof.
Note 1 in the appendix indicates...
In the 10th Edition, Addendum 4, (2) separate area requirements had to be met for the roof-to-shell juncture compression area in F.5.1. The first equation involved the full internal pressure on the roof. The second equation was for 40 percent of the internal pressure.
In the 11th edition...
I have a request to design a vessel using Duplex 2101. The UNS number for this material is S32101. I am running Build 6252 of COMPRESS and cannot find this material in the ASME 2004 A06 database. I also cannot find a similar SA-240 plate with a similar composition (21% Cr, 1.5% Ni).
Is...
I am designing an F&D bottom head for an 11'-0" I.D x 15"-0" tall, 304L storage tank via API-620. Assuming the bottom head approximates a spherical segment, I am using equations (4) and (5) from section 5.10.2.5. to calculate T1 and T2.
My question regards the correct value for 'W' along...
