So I've been thinking about this and I think I should be able to use the MA14 rules for a flat head without a nozzle in some fashion to derive the stresses in the upper member. Does this seem unreasonable? This gets me the moment and the rest is the flange & plate constants and stress...
Thanks for the links saplanti. Found some good stuff in there and some companies that we hadn't yet approached. We have fairly low temperatures, but pretty high pressures and a fairly large diameter. I can't really get into the details, unfortunately.
Thanks SnTMan. Your cautions are well taken. I usually try to live by the KISS principal. However, this is for a test facility and it is a custom closure for quick access. I would prefer to make something simpler like a bolted flange, but we are exploring several options and this is one of them...
I think my free body diagram for Shell 1 looks like this. Although I have to rationalize some of the forces in my own head.
Is it true that if I am using an o-ring in a groove that it qualifies as "self energizing" and the HG load is zero?
Hi folks,
I have a problem illustrated by the attached sketch. It looks somewhat, but not exactly reminiscent of reverse flanges from Mandatory App 2 figures 2-13.1 and 2-13.2 from the ASME BPVC Section VIII-Div 1.
So I was trying to hammer this into a reverse flange case as described in...
Agreed. Definitely a potentially huge energy release. I am familiar with these types of problems, but I've only approached them from the stand point of fragments - the 1/3 disk type of problem like a ruptured flywheel or a turbine/fan blade type of release. I've never seen a treatment of a...
dvd - Thanks for the reply. That looks like one of the below ground spin pits we use to use for containment evaluation. I am familiar with ballistic containment analysis from a disk burst into three parts. Defnitely some interesting papers on that search. It doesn't really address what I was...
One of my colleagues at work approached me about a shaft in a test rig that has a crack and he was wondering if the rig case would be able to contain the shaft if it boke at the location of the crack. I've done analysis of various ballistic impacts from flying debris, but even though I have...
Interestingly this person created a presentation showing the history of valve pressure ratings which includes some excerpts from ASME B16.5-1957 on slides 7-10. The 1957 spec shows that a 316ss 1500# class flange was rated for... you guessed it 685 psi at 1300°F.
From this document it looks...
B16.5-NM Appendix A-2.3 does say the following...
A-1.5 Material Groups
Materials are grouped in Table 1A based on identical
or closely matched allowable stress and yield strength
values. When these values are not identical for each
material listed, the lowest value has been used. Note
that...
FacEngrPE - I believe the piping was according to B31.3, but the drawing I'm looking at only references the BPVC (1977) and B16.5, so I can't say that for sure. My group now uses both depending upon application, and its essentially the same group but things have changed a lot in 44 years. Those...
If you mean what code was used for the piping it was the ASME BPVC. I'm sure it was the latest rev back then - looks like it was 1977 by the dates on some of the piping assembly drawings. The specific flange I was looking at was a 14" Class 1500 pound ANSI flange. My question is more to why the...
I am working on evaluating pressure limits for an air system to be run at various temperatures in the creep range. This question concerns evaluating flange pressure limits according to ASME B16.5 (2009). I took a look at the pressure rating table for a 316ss flange at 1300°F (B16.5-Table...
