NBN ISO 2715:2021

This document describes and discusses the characteristics of turbine flowmeters. Attention is given to
the factors to be considered in the application of turbine meters to liquid metering. These include the
properties and nature of the liquid to be metered, the correct installation and operation of the meter,
environmental effects, and the wide choice of secondary and ancillary equipment. Aspects of meter
proving and maintenance are also discussed.
This document is applicable to the metering of any appropriate liquid. Guidance is given on the use of
turbine meters in the metering of two-component liquid mixtures such as water and oil.
It is not applicable to two-phase flow when gases or solids are present under metering conditions (i.e.
two-phase flow). It can be applied to the many and varied liquids encountered in industry for liquid
metering and is not restricted to hydrocarbons.
Guidance on the performance expected for fiscal/custody transfer applications for hydrocarbons is
outlined.
This document is not applicable to cryogenic liquids, such as liquefied natural gas (LNG) and refrigerated
petroleum gas. It does not cover potable water applications.