The supplementary international comparison of national gas flow standards COOMET.M.FF-S9 was carried out from May 2019 to January 2020. The comparison were made in the range of gas flow from 20 to 6500 m 3 /h. Six European National Metrological Institutes (VNIIM-VNIIR, PTB, IFSM, BelGIM, LEI and LABSAGAS) took part in the comparison. The VNIIM-VNIIR acted as a pilot laboratory. The participants used for comparison the reference test rigs, implemented mainly on the basis of reference critical nozzles or reference flow meters. The transportable comparison standards (rotary and turbine flow meters) were used for the comparison procedure and in sequence were sent to the participants for testing. According to the results of the comparison, all participants confirmed their calibration and measuring capabilities in the declared flow ranges. == Main text To reach the main text of this paper, click on [https://www.bipm.org/utils/common/pdf/final_reports/M/F...]

中文翻译：

---

气体流量和体积方面的国家标准比较，气体流量从20到6500 m 3 / h

在2019年5月至2020年1月进行了国家气体流量标准COOMET.M.FF-S9的补充国际比较。该比较在20至6500 m 3 / h的气体流量范围内进行。六个欧洲国家计量学院（VNIIM-VNIIR，PTB，IFSM，BelGIM，LEI和LABSAGAS）参加了比较。VNIIM-VNIIR充当了试验实验室。参与者用于比较参考测试台，主要基于参考关键喷嘴或参考流量计实施。将可移动的比较标准品（旋转流量计和涡轮流量计）用于比较程序，并依次发送给参与者进行测试。根据比较结果，所有参与者都确认了他们在声明的流量范围内的校准和测量能力。