Flowmeter tip of the month: Ensure meter accuracy
One of the easiest ways to ensure meter accuracy is to ensure that the meter is piped properly. Attention should be paid to the required upstream and downstream pipe requirements needed to 'smooth' out the flow profile.
One of the easiest ways to ensure meter accuracy is to ensure that the meter is piped properly. Attention should be paid to the required upstream and downstream pipe requirements needed to 'smooth' out the flow profile. When laminar flow (Reynold's Number < 2,000) is achieved, there are no disruptions and the maximum velocity is in the center of the pipe. This is a desirable profile. Partially open valves or improper alignment of flange gaskets can distort the flow profile causing turbulent flow (Reynold’s Number > 4,000). This will cause errors in the meter's accuracy. Below are some guidelines on the minimum distances required to achieve the desired flow profile.
In the event that the recommended pipe lengths can't be provided, there are devices that can assist in providing a favorable profile. Such devices include perforated plates and internal pipe tabs can reduce swirl and mimic a laminar flow profile.
Content provided by Spirax Sarco, originally published in Steam News Magazine.
- Events & Awards
- Magazine Archives
- Oil & Gas Engineering
- Salary Survey
- Digital Reports
- Survey Prize Winners
- CFE Edu
Annual Salary Survey
Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.
There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.
But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.
Read more: 2015 Salary Survey