Canada Pipeline accessories has been expanding its reach into the world of correcting problems with flow in pipelines using in situ conditioners which improve overall accuracy of flow measuring insruments.

Uncertainty Values for metering devices are always based on the steady state flow of the single phase homogenous Newtonian fluids with a meter entrance velocity profile that resembles that which is obtained in a long straight run of pipe. Departure from these flow conditions will result in metering errors due to installation effects. The fluid flow condition at the Flow Meter entrance necessary for accurate measurement is referred to as the fully developed velocity flow profile.

ISO 5167 refers to a Fully Developed Velocity Flow Profile as a state of flow where; the actual fluid velocity flow profile resembles the fully developed state within 5%, and the swirl angle is within 2 degrees of zero. This requirement is deemed to be acceptable for all types of metering applications as well (AGA-3, AGA-9, AGA-7), yet not imposing impossible restrictions on fluid flow conditions in the pipe.

99% of flow meter applications do NOT exhibit the fully developed fluid flow state. Piping lengths of up to 150 to 200 internal pipe diameters are required to create this essential pipe flow condition. The alternative is to install a CPA 50E Flow Conditioner into the pipe. This is the most economical and accurate method to create a fully developed flow profile in the pipe with meter runs lengths as short as 13 pipe diameters.

Canada Pipeline accessories can help play a major role in greatly improving flow measurement.

Website www.flowconditioner.com
email : cpacl1@telusplanet.net