Hi all,

I just started with a company that makes differential pressure flowmeters three months ago.  I was hired because the company being consolidated back to corporate headquarters but none of the engineers were relocating.  I forced as much information into my head as possible while the other engineers were still with the company.  However, I am stuck on designing a wedge meter for a customer.  I have as a reference, Flow Measurement Engineering Handbook by R.W. Miller.  Looking at the section on segmental orifices is not giving me the information I need (at least it does not match units we have already designed).  I need to know what the tap spacing is for this meter.  Surely there must be some guidelines out there.  I am pretty sure ASME does not specify the guidelines, but there must be a rule of thumb out there.  I know my beta ratio, pipe ID and wall thickness.  I should be able to come up with hi/low tap spacings and an over all length.  

If anyone out there has a reference that would help me, it would be greatly appreciated!

Thanks in advance!

idesign, follow the link below. It is an article about wedge flow meter which you may find usefull when designing a wedgmeter.
http://www.flowcontrolnetwork.com/PastIssues/jan2002/2.asp