Re: Flow element in vertical position.

Ken:

You do not provide much information, so it is difficult to provide a good answer. However, some types of flow element function well in the vertical and some don't perform as well. Some function best with some movement of bubbles, solids, etc. (such as a magnetic meter, or an ultrasonic. These might not do as well in vertical, as the pipe cross-section is full and the flow pattern may not be as desireable for the signal. There is also the issue of superficial velocity. If the velocity is not in the right range, the instrument may not sense well (repeatable signal, tight range).   If you do not have the right number of equivalent pipe lengths before and after your element, the output will not be as consistent, repeatable, or "accurate" as it could have been. It might also have excess turbulence, which can be bad for the device, depending on the technology.

... Bruce D. Bullough ...
Lead Process Engineer
Foth Production Systems, LLC
8550 Hudson Boulevard North, Suite 100
Lake Elmo, MN 55042
Direct: +651-288-8598 Fax: +651-288-8551 <a href="http://www.foth.com">http://www.foth.com</a>

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Subject
[PipingDesign] Flow element in vertical position.

Dear sir/s,

We discussed with my colleages regarding installation of fittings, the flow element and flow element indicator. Widely used in the industry is the installation in horizontal position with straight runs prior to entering the fittings.
As far as I know, straight runs is appropriate in the arrangement to avoid turbulence and so the fitting can achieve a minimal error in its sensors. But, we disagree in the installation of the fittings in vertical position, although there is still a straight run in the arrangement. One is telling that it is OK and the other one is NOT.
Also, we did not achieve the minimum length of straight runs. Can you shed some light with my query?

Ken
Snamprogetti, Khursaniyah
Saudi arabia Received on Mon Feb 18 17:08:00 2008