May 24, 2016

McCrometer Flowmeter Meets New ISO Cone Meter Standard

Company helped organization develop guideline

McCrometer Flowmeter Meets New ISO Cone Meter Standard

The V-Cone flowmeter from McCrometer conforms to the new industry standard International Standards Organization (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 new 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 & Industrial Process business unit. “With multiple suppliers making various claims, our customers have long wanted the [ISO] to provide them with assurance about cone meter accuracy claims and installation requirements.”

McCrometer’s V-Cone meter already conforms to the American Petroleum Institute’s API 22.2 Testing Protocol for Differential Pressure Flow Devices. It also is certifiable to local or regional standards, including Measurement Canada, INMETRO, GOST and others.           

“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,” Voss said.

The new 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%, which is a significant performance difference. 

In addition, the new standard includes a 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 ISO17025 standard. McCrometer operates one of only six flow labs in the USA accredited to ISO/IEC 17025:2005 through the National Voluntary Laboratory Accreditation Program.

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

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