Capacity improvement of MT primary standard facility

Wei Han, Can Li, Nan Sun, Chuanbo Zheng, Guanwen Huang, Chaofan Song, Chunhui Li

Abstract

MT primary standard facility is the highest standard of natural gas metering field in China. In order to improvethe capability level of the facility, the station took a series of measures. By adding a spherical tank insulation layer, changing the sampling position of the chromatograph and so on. After that, a new method was used to re-evaluate the uncertainty of the facility. At the same time, two nozzles were selected to carry out therepeatability and stability test, and the test results met the requirements of uncertainty. Afterall, the uncertaintylevel of the facility is increased from 0.1 % (k = 2) to 0.05 % (k = 2), and the uncertainty of the venturi nozzle outflow coefficient of calibration critical flow is 0.14 %. The capacity improvement work makes the level of the mt primary standard facility improved significantly, and it is very important for the valuation transfer and traceability system.

Keywords

MT primary standard; Uncertainty; Capacity improvement

Download

IMEKO-TC9-2019-083.pdf

DOI

10.21014/tc9-2022.083

IMEKO TC

TC9 - Flow Measurement

Back to the proceedings