电磁流量计国家检测标准

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(电磁流量计国家检测标准)

1.2.管道式电磁流量计
2．1．对曲段的要求
为了改善涡流取流场畸变的影响，流量计安拆的前、后曲管段长度有必然要求，不然会影响丈量精度（也可安拆整流器，尽量制止正在靠近调理阀和半开阀门之后安拆）。蒸汽干度测量方面也将会随着氯根法、热力学法、光学法、微波法以及超声波法等技术的不断完善而实现快速准确的高精度计量；
管道内壁过大的粗拙度会形成管道内径值和流速散布形态的变革。正在湍流活动时，管壁粗拙度对流速散布很敏感，它会招致管内流速散布趋于弯曲，使线、面流速校正呈现偏向，见图3。内壁粗拙度的影响也能够通过改动校正系4000118588。
(电磁流量计国家检测标准)

(电磁流量计国家检测标准)

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(电磁流量计国家检测标准)

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(电磁流量计国家检测标准)

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(电磁流量计国家检测标准)

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