The report does not indiacte if these plates are
rocommended by AGA or ASME.
These orifice may be useful in plant or field check meters (not custody) for flow of fuel gas alocation meters such as In-Plant reboilers, heaters, internal combustion machineries,etc. or in fields like gas storage field, water inject wells... etc. Not custody transfer meter. Check with the manufacturer...
Regards,
>
> Does anyone have experience with these? It seems to
> be a relatively new
> technology and I can't see any downside (aside for
> price maybe, but it's
> really just an orifice plate - how much could it
> realistically cost?)
>
> <a href="http://www.rosemount.com/document/ads/1595_2_01.pdf">http://www.rosemount.com/document/ads/1595_2_01.pdf</a>
>
> Excerpted from the PDF link above:
>
> Table 1 depicts a comparison between conditioning
> orifice plate
> technology and standard orifice plate technology,
> highlighting the
> deviations from the standards. These deviations
> allow for a more
> flexible installation as straight pipe requirements
> are reduced in some
> cases by as much as 96%.
>
> [...]
>
> Piping Requirements
>
> Standard orifice plates require significant straight
> pipe to assure an
> accurate flow measurement while conditioning plate
> technology requires
> only 4 diameters of straight pipe. This equates to
> significant savings
> in pipe material costs and allows flexibility in
> determining flowmeter
> placement. There are dramatic savings to be obtained
> when purchasing
> pipe, in some cases there is up to a 96% reduction
> in straight pipe
> requirements.
>
> [...]
>
> Summary
>
> The Conditioning Orifice Plate is a revolutionary
> innovative
> technology based on the most common differential
> primary element
> in the industry. While not complying with the
> standards of AGA
> Report Number 3, ASME MFC 3M or ISO 5167, it is
> designed based
> on those standards and provides superior performance
> in short
> straight pipe run, tight fit applications with
> upstream flow
> disturbances.
>
> - Requires 2 diameters upstream of a flow
> disturbance and 2 diameters
> downstream.
> - Decreased straight runs can lower installed
> cost.
> - Provides flexibility of flowmeter placement and
> design.
> - Compact design reduces installation costs as
> compared to standard
> orifice plates.
> - Highly accurate and repeatable primary elements.
> - Simplified ordering and reduction in inventory,
> only two betas to
> choose; one for high flows, one for low flows.
> - Suitable for most gas, liquid and steam
> applications.
>
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