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Thanks very much for the help - that got it for us. As for the spreadsheet itself, we know, work with, and trust the engineer that made it - but of course we still need backup. He was able to track down the Haaland equation but wasn't able to find where he'd got the other one (with the natural...

Hello all, I'm trying to validate a spreadsheet we have for calculating pressure drop of gas flowing through pipe, but unfortunately the documentation is lacking - none of the "more obscure" formulas used have a source attached to them, and there's one in particular I can't find. I've looked...

Yeah, I've called the local vendor...they too said that serial numbers would help a lot, but unfortunately we couldn't get them off the valves themselves (they're covered in paint). So I'm in the middle of a bit of a back-and-forth with them. The first discussion didn't leave me too optimistic...

That would be great, thanks!

Hello, We're trying to find information on some old Fisher control valves - all we were able to read off the valves themselves was that one of them is a BZM and the other is a 125-P. They're both 1" and threaded (the 125-P has a 3/8" orifice). I've been searching the internet and all the Fisher...

Hello, Does anyone know of a tightening sequence for a 42-bolt-hole flange? It's for closing up a 30" manway on an aboveground storage tank (atmospheric). I've been able to find them for flanges with 40 or 44 bolt holes, but nothing else. If there aren't any that exist, does anyone know of the...

I'm not sure whether this is the right forum for a question about an AST, but here goes anyway. I'm trying to determine the stresses that a tank's edge settlement will cause in its floor-to-shell weld for a presentation my boss is making on it later this week. Does anyone have any...

I'm trying to learn the effects that edge settlement of a storage tank will have on the floor to shell weld - does anyone have any suggestions as to where I could look for info on that? So far, basically all I know is that edge settlement will cause a bending and shear stresses in the weld...