I have what I feel is a non-issue, but another engineer in my office feels that it is an issue, and I need some clarification. We design pipe systems to B31.1, also, being in Canada we require CRN's for any fitting or valve in the system. At some point in the past few years, an engineer in our...
Sorry, when I said it's the QA/QC requirements that really cost you, I mean in a relative sense. From jobs that I've worked on the additional QA/QC requirements to execute 31.1/.3 work is where the bulk of the cost difference occurs between a 31.1/.3 and 31.9 project.
As an example, where I'm...
My two cents (if it's worth that much :-)):
Where I work, we generally design all piping to 31.1. In some cases 31.9 is actually a more applicable code (based on temp & pressure).
We could state on our design drawings that the piping is designed to 31.9 or 31.1 and I suspect our projects will...
Steve,
Thanks for your replies. Sorry, where does the 2*S_y limit come from? I've never come across this before.
I've always understood that local yielding is acceptable. I figured that was more related to the SIF's at branches, elbows, etc and generally not explicitly predicted by the code...
I'm wondering if anyone can provide an explaination for something I have recently noticed with B31.1, Appendix VII on buried piping.
In the example provided in the appendix, the author is using A106 Gr B piping, which has a yeild stress of 35 ksi. In the appendix the calculated allowable (using...
