封闭导管中流体流量的测量 - 通过旋入式流量计的流量测量 该流量计插入圆形横截面导管中

[中文适用范围]： 本文件 a) 描述了涡街流量计在液体、气体和蒸汽中的使用，包括术语表和一组用于指定性能的工程方程，b) 提供技术信息以帮助用户选择、指定和应用涡街流量计脱落流量计，包括影响效果，c) 描述典型结构并提供检查、认证和材料可追溯性的建议，d) 描述与涡街脱落流量计相关的诊断的可用性，e) 提供校准指导，f) 不适用于插入型涡街流量计，g）仅适用于满流的封闭管道，h）仅适用于稳定或仅随时间缓慢变化的流体流量，i）适用于被视为单相的流体。 [外文原描述]： ISO 12764:2017 a) describes the use of vortex shedding flow meters for liquids, gases, and steam, including a glossary and a set of engineering equations used for specifying performance, b) provides technical information to assist the user in selecting, specifying and applying vortex shedding flowmeters, including influence effects, c) describes typical construction and provides recommendations for inspection, certification, and material traceability, d) describes availability of diagnostics associated with vortex shedding flowmeters, e) provides calibration guidance, f) does not apply to insertion type vortex shedding flowmeters, g) applies only to closed conduits running full, h) applies only to fluid flow that is steady or varies only slowly with time, and i) applies to fluids considered to be single-phase.