Methods have been developed which will permit the calculation of flow patterns and discharge coefficients for concentric orifices of various diameter ratios when used for the measurement of incompressible flow in pipe lines. These methods are based…
An analysis of how secondary elements of orifice flow measurement (gage lines, valves, and recording devices) are affected by the presence of pulsating flow.
Evaluates the effects of orifice flow measurement errors in the presence of pulsating flows, specifically square root error. The work includes the development of an extended error theory, a series of tests was conducted at Southwest Research…
Flow measurement tests were conducted with more than 25 API 14.3 compliant orifice plates that had been geometrically characterized. Possible sources for the variability in the flow measurement performance of these plates were investigated relative…
Flow disturbances caused by upstream headern in multi-run meter stations can affect the flow field in the meter runs, and hence affect the accuracy of flow rate measurements by orifice meters.. This paper presents results of two header…
A set of test matrix points were made on a 10" Daniel Senior orifice fitting with different orifice plates to assess the impact of 'e' thickness of an orifice plate on measurement accuracy.
An investigation to flow test and measure a large set of orifice plates to determine the proportion of existing orifice plates have measured discharge coefficients outside of the Reader-Harris/Gallagher equation 95% confidence limits. The research…
A large installed base of orifice meters, many installed where newer technology meters are impractical, accounts for a significant fraction of the measured volume of natural gas in the United States. Ultrasonic meters are newer technology meters that…
In many applications within the oil and gas industries, and in particular in the measurement of flow, differential pressure transmitters must operate with high accuracy and repeatability. The uncertainty of the measurement of flow varies…