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首页> 外文会议>2004 AGA operating section proceedings >Improving Orifice Meter Performance: A Case-Study of Orifice Metering Accuracy fromVarious Field Stations
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Improving Orifice Meter Performance: A Case-Study of Orifice Metering Accuracy fromVarious Field Stations

机译：改进孔板流量计性能：以各种现场站的孔板计量精度为例的研究

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New metering technologies offer many advantages over the traditional orifice flow meter. Despite thernadvantages, gas companies must consider the cost of upgrading an existing meter station before installingrna new flow meter technology. Often times, the cost associated with an orifice meter replacement involvesrnthe cost of the new flow meter, as well as the associated cost of fabricating new meter runs, calibratingrnthe meter and installing the meter and related instrumentation. Because these costs may not be justifiablernat all meter stations, U.S. gas companies still rely on orifice flow meter measurement throughout thernmajority of their pipeline systems.rnPanhandle Energy estimates that orifice meters make up approximately 80-90% of the meters in therncompany’s pipeline network. Due to the need to account for gas more accurately and reliably, PanhandlernEnergy conducted a series of tests aimed at studying the performance of orifice meters under variousrnoperating conditions. Orifice meter runs from various Panhandle Energy meter stations were tested at thernSouthwest Research Institute Metering Research Facility (MRF). The orifice meter accuracy (andrnpossible bias) was determined using a reference standard provided by the MRF High Pressure Looprncritical flow Venturi nozzles.rnThe results of the study provided guidelines that can be used to justify the option of replacing anrnorifice meter with a new flow meter. When an upgrade to a new flow meter technology is not justified,rnthe study found that the accuracy of orifice meters could be improved significantly by honing the meterrntube to reduce the pipe wall roughness and/or replacing the 19-tube bundle with a plate-type flowrnconditioner.
机译：新的计量技术比传统的孔板流量计具有许多优势。尽管有这些优点，但天然气公司在安装新的流量计技术之前必须考虑升级现有流量计站的成本。通常，与孔板流量计更换相关的成本涉及新流量计的成本，以及新流量计的制造，校准仪表以及安装仪表和相关仪表的相关成本。由于在所有的计量站中这些费用可能都不合理，因此美国天然气公司仍在其大部分管道系统中仍然依赖孔板流量计的测量。PanhandleEnergy估计孔板流量计约占该公司管道网络中流量计的80-90％。由于需要更准确，更可靠地计算气体，PanhandlernEnergy进行了一系列测试，旨在研究在各种操作条件下的孔板流量计的性能。西南研究院计量研究设施（MRF）对来自Panhandle能源计量站的各个孔板流量计进行了测试。孔板流量计的精度（不可能的偏差）是使用MRF高压环流文丘里喷嘴提供的参考标准确定的。研究结果提供了指导原则，可用于证明用新的流量计替代过分流量计的合理性。当没有必要对新的流量计技术进行升级时，研究发现，通过珩磨仪表管以减少管壁粗糙度和/或用板式更换19管束，可以显着提高孔板流量计的精度。流量调节器。

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