hello,
I am looking for a method to design flat plates under low pressure and some accelerations. The shapes do not fall within the scope of App. 13 in SC 8-1. One shape has an elliptical cross-section, the other is hopper like with an inverted pyramid shape attached to the bottom of a cube...
The Seismic codes talk about inherent torsion and accidental torsion. I cannot find an exclusion for non-building structures not similar to building. Is there an example somewhere of how to determine the resultant loads on the vessel supports from torsion on the vessel? I am especially...
Can you take a PQR that satisifes your other mechanical tests and combine it with another PQR that was only impact tested to create a WPS or does it have to be done all at once? The issue is the impact testing requirement was simply overlooked on the first round.
In the seismic requirements for boilers and pressure vessels in chapter 15.7.11 of ASCE 7-05:
A)Applying 15.7.2(c)(1) for cases considering vertical seismic effects, results in an equation for static head as
SH = gammaL*(0.2*SDS*I+1)*depth. Is this correct? When loading combinations require...
In the seismic requirements for boilers and pressure vessels in chapter 15.7.11 of ASCE 7-05:
A)Applying 15.7.2(c)(1) for cases considering vertical seismic effects, results in an equation for static head as
SH = gammaL*(0.2*SDS*I+1)*depth. Is this correct? When loading combinations require...
I am looking into purchasing some math software to do a variety of things for pressure vessel design. One of the things I will need is symbolic integration (not as good at integrating as I used to be), where I am able to set up the integral but i am not able to solve it. Another thing I would...
Has anyone read any articles on the changes to the 2006 AWS code from the 2004 version? Is there another resource, like a website, that has this information. Thanks in advance.
It is my understand that the newest version of ASD no longer allows for a 1/3 increase in the allowable stress for the member in question when wind/seismic loading is applied. Is this the case or is there more context to this?
I am designing a horizontal vessel that will sit on two longitudinal beams that will be attached to the vessel for the complete length. I am attempting to find a stress/strain formula for a cylinder with two radial line loads with a angle between them that go down the entire length of the...
I am designing a large opening in a large vessel. The design requires App. 1-7(b) calculations. The opening passes reinforcement calculations easily. It is failing 1-7(b) though. The use of a pad is not available but gussets can be used. Dos anyone know how to take advantage of the added...
When superimposing the external pressure stress in the longitudinal axis with the bending from the saddle reactions are you supposed to compare it to min(S,B) from UG-23 of ASME SC VIII-I or are you supposed to compare it to B/3 from UG-28? Thank you in advance.
I have a few points on these calculations I would like to clear up for myself.
1. When I perform a WRC-107 on a repad for a nozzle I model it like it is a hollow attachment with the thickness of the nozzle thickness + the pad width. I would like some comments on this method. I intend this to...
I have a potential customer who is considering contracting the fatigue calculations on their vessel to me. The end user which is his customer is requiring fatigue calculations to be done per Miner's Rule in Section III (possibly Section II, because the letter was fuzzy). I am fairly familiar...
Can someone suggest a method to analyze the localized stresses on a shell wall from its leg supports (just the local stresses, the leg design is ok)? I considered WRC-107 but I do not think that it applies if the welds do not form a closed shape. FEA is NOT a possibility.
ASME Sect. VIII UHX provides tubesheet analysis when a cylinder is attached to the tubesheet but not when a hemispherical head is attached to the tubesheet. I would appreciate any leads on some methodolgies already published on this subject.
I have been going over the Appendix 1-7(b) Calculations for large openings in cylinders. I was able to rederive the membrane stress equations;however, I am unable to rederive the bending moment equation. It is important that I can do this. I would appreciate any help.
