目 录
一 概述 ·............................................................................................ ( 1 )
二 技术要求 ·...................................................................................... ( 1 )
(一)一般要求····························，··，················，································…… (1)
(二)流体条件·················································································…… (3)
(三)计量要求········································································‘····…… (3)
三 检定条件 ·...................................................................................... ( 6 )
四 检定项目和检定方法 ·....................................................................... ( 6 )
(一)外观检查·······························，···············································…… (6)
(二)示值误差检定，····，·······························，，，，········，，，，，，·····……(6)
(三)流量稳定性的检定···················，········································，········…… (10)
五 检定结果的处理和检定周期 ·.............................................................. (10)
附录1 计量横截面内测点的定位和数目 ············，·，····························…… (11)
附录2 用算术法计算轴向平均速度时测点的分布与计算 ························…… (12)
附录3 用皮托管测速时的计算公式 ···················································…… (15)
附录4 环形横截面与矩形缺角或矩形圆角横截面中测点的分布与轴向
平均速度的计算 ···········，····························44······，·，·，·········…… (16)
附录5 测量圆管中处于漩涡及非对称流动状态下流体流量的速度
面积测量方法 ····························································……:’…… (19)
附录6 t。数值表与d，数值表·········，·，······································，·······…… (21)
附录7 计量横截面检定记录表 ··，，，，，，···········，，，，，，··············，，，·，······… … (22)
附录8 示值误差检定记录表 ·································‘··························…… (23)
附录9 流量稳定性检定记录表 ························································…… (24)
附录10 检定证书内容···················，，·.................................................. (25)
速度一面积法流量装置检定规程
本规程适用于新安装和维修后的测量封闭管道中流体流量的速度一面积法流量装置
(以下简称流量装置)的检定。
一 概 述
该流量装置的原理是通过测量出封闭管道 (圆形或矩形)计量横截面的面积和流过
该计量横截面的轴向流体平均流速，从而计算出体积流量。
该流量装置由一定长度的前后直管段、计量段、流速测量装置 (旋桨式流速计或皮
托静压管等)，以及温度、压力测量仪表等部分组成，其结构简图如图1所示。
