Flow Measurement & Control


ISO standard for cone meters

August 2017 Flow Measurement & Control

With decades of proven performance, the innovative V-Cone flowmeter from McCrometer conforms to the industry standard ISO 5167 Part 5: Cone Meters, which helps engineers make better informed decisions about cone flowmeters in the same way that they have relied on Parts 1-4 for other types of differential pressure (dP) meters.

“We’re proud to have assisted in developing this ISO standard for cone meters, which is something that our customers have been requesting for years,” said Nick Voss, general manager of McCrometer’s Oil, Gas and Industrial Process business unit.

“With multiple suppliers making various claims, our customers have long wanted the International Standards Organization to provide them with assurance about cone meter accuracy claims and installation requirements,” said Voss.

McCrometer’s V-Cone meter, Voss explained, already conforms to the American Petroleum Institute’s API 22.2 testing protocol for differential pressure flow devices. “With ISO, there is now a second respected global standard for cone meters, which explains their principle of operation, the differing performance accuracy of calibrated versus uncalibrated meters and their minimal straight pipe run installation requirements.”

The ISO 5167-5 standard confirms that uncalibrated cone meters perform at no better than 5% accuracy. Laboratory calibrated cone meters, such as the V-Cone meter, are accurate to 0,5%, a significant performance difference.

In addition, the standard includes a groundbreaking section, providing explicit guidance on how to calibrate a cone meter. This includes a recommendation that each flowmeter is calibrated in laboratories accredited to the ISO 17025 standard. McCrometer operates one of only six flow labs in the USA accredited to ISO/IEC 17025:2005 through NVLAP.

Finally, ISO 5167-5 verifies cone meters can be installed with a straight pipe run of only 0-3 diameters upstream and 0-1 diameters downstream. This feature is useful where space and weight are a concern, such as offshore platforms and vessels.

For more information contact Stuart Brown, UIC Instrumentation, +27 (0)31 468 2561, stuartb@uic.co.za, www.uic.co.za


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