Introduction

A pipe prover is a measuring system that is used as a measurement standard for volume or for measuring the flowrate of liquid. These systems have advantages over other conventional measurement methods for precise volumetric measurement using a calibrated base volume, a semi-automatic measurement in a production/calibration line, and continuous measurement without interrupting the flow (for certain types of provers).

Because of these advantages, pipe provers are widely used as standards to calibrate/verify flow meters or as capacity measures for liquids, including water and oil. The users of these instruments include national/local metrology institutes, calibration laboratories, manufacturers of measuring instruments, water utilities, food industries, and oil/chemical industries.

This Document may be used in conjunction with other International Recommendations and standards such as OIML R 49-1:2013, OIML R 49-2:2013, OIML R 49-3:2013, OIML D 35:2020, OIML R 117-1:2019, OIML R 117-2:2019, OIML R 117-3:2019, ISO 91:2017, ISO 4267-2:1988, ISO 7278-1:1987, ISO 7278-2:19881), ISO 7278-3:1998, ISO 7278-4:19991) and ISO 8222:2020.