Re: Effect of non-recommended up/downstream distances on flowmeter accuracy

From: <Christopher>
Date: Sat Feb 23 2008 - 01:11:00 EST

On Feb 22, 2008, at 11:39 PM, kiqbal9@yahoo.com wrote:

> But the question is still un-answered, I.e. How to establish
> inaccurancies for reduced lengths of straightness.
I don't think general rules are possible--too many possible variations, especially for things like orifices and reducers which block the flow. It'll depend a great deal on how a particular device works. For example something like a pitot tube measures the local velocity so its positioning across a pipe diameter is critical. For a given situation it's probably not difficult to establish inaccuracy by direct calibration.

Christopher Wright P.E. |"They couldn't hit an elephant at <a href="/group/PipingDesign/post?postID=m0rRYy6Bx4xhSsHDxajmuwIozfgubTQh5GBtzK9IbAibiPbweBYy14LhAHzuwRKWugThIDAoZQ0auSTx">chrisw@skypoint.com</a> | this distance" (last words of Gen.

.......................................| John Sedgwick, Spotsylvania

1864)
<a href="http://www.skypoint.com/~chrisw/">http://www.skypoint.com/~chrisw/</a> Received on Sat Feb 23 01:11:00 2008