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Title: Investigation Of Flow Conditioning In Pipes
Author: Gabriel Moniz Pereira, Bodo Mickan, Rainer Kramer, Dietrich Dopheide
Source: Flomeko 2003
Year Published: 2003
Abstract: It is a well-known and recognised fact that the behaviour of flow rate and volume measuring devices can be affected very strongly by the flow conditions prevailing in their inlet pipe section. Disturbed velocity profiles caused by pipe configurations such as bends, headers, pressure regulators and convergent or divergent pipe sections in front of a flow meter can lead to deviations of the meter reading by up to several percents. Thus, flow conditioning normally means the generation of fully developed flows in the inlet of meters to avoid installation effects. Since this is in practice not always possible, it is necessary to investigate the influence of flow perturbations to the behaviour of flow meters. Such investigations are normally part of pattern approval in legal metrology. Hence, in case of pattern approval flow conditioning means the generation of disturbed flows with a definite and reproducible level of perturbation. The International Organisation of Legal Metrology OIML defined therefore standard pipe configurations (e.g. in OIML Recommendation R 32 1) to perform perturbations test within pattern approvals.

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