New at PipingDesign.com: 01 June 2001

Thanks to Gustavo, I've located and directly linked a page that may be of interest (and if you followed his lead, you've likely already seen it).

Does anyone remember why an engineering drawing of a vessel should always be dimensioned from the theoretical tangent line of a 2:1 semi-elliptical head and *not* from the weld seam?

I have a couple of examples here that I might scan and upload in order to illustrate why/why not.

Paul

<a href="http://www.pipingdesign.com/processvessels.html">http://www.pipingdesign.com/processvessels.html</a>

Perfect Cone Layout
www.laurencebrundrett.com

<<A distinct memory of my days as a weld shop engineer is the amount of difficulty people had designing cones. I could almost guarantee that customer developed cones would not roll to the correct dimensions. These same customers knew to get help when designing intersections or elbows, but cone layout seems simple: An outside arc, an inside arc with the same origin and a common sweep angle. How difficult can it be? The problem is that the standard methods these customers used did not take into account the thickness of the cone material. A cone transitioning between two different pipe diameters has to match the small pipe on the OD and the large pipe on the ID. This is called a "Pipe" setup, and will work when the pipes and cone have the same thickness. >> Received on Fri Jun 01 00:31:00 2001