Changing line size with flowmeter
Changing line size with flowmeter
(OP)
Hi Everyone,
I have to change a discharge line pump from 3" to 4". This line has a flowmeter. What are flowmeter's parts that I should change?
It's a magnetic flowmeter. However the Operating personnel does not trust it. Is there another flowmeter type we have in the market, which is better?
Thanks,
I have to change a discharge line pump from 3" to 4". This line has a flowmeter. What are flowmeter's parts that I should change?
It's a magnetic flowmeter. However the Operating personnel does not trust it. Is there another flowmeter type we have in the market, which is better?
Thanks,





RE: Changing line size with flowmeter
If this new pump has the same capacity as the former pump, then you do not have to change anything. (Supposed the flowrate is already within the measuring range of the flow meter.) Many magflometer have smaller diamter than the pipe.
Why they do not trust it? Log the flowmeter signals with a DATALOGGER to test reliability.
Regards,
C.
RE: Changing line size with flowmeter
John
RE: Changing line size with flowmeter
Also flowtubes are usually matched to the meter. Once you post the manufacturer I can give you more info.
Good luck
RE: Changing line size with flowmeter
just a concern...
RE: Changing line size with flowmeter
At the International School of Hydrocarbon Measurement (ISHM, a really good conference held in Oklahoma City in May every year) the vast majority of engineers are vendors - it is a rare company that sends (or even has) a "measurement engineer".
For example, when I ask meter-tube fabricators for their sizing calculations I either get a truly blank stare or a copy of API 14.3 Part 2. Neither of which bodes well for any sort of measurement in Oil & Gas.
I've heard a lot of complaints about mag meters in intermittent service (i.e., on a line downstream of a dump valve). The operators frequenly have to take them out of service and "clean the optics" (I've never done it and don't know what is involved) which the operators really hate.
David
RE: Changing line size with flowmeter
Like everything else, there is more than one style of magmeter, DC Pulsed, AC etc.
But hey, who needs an engineer? You just call in the suppliers salesman and, rather than spend money on engineering or on commissioning, for example, you just get the salesman back in for free support under "customer good will" by saying "if this works, we may want another dozen."
JMW
www.ViscoAnalyser.com