ISA RP31.1

These recommendations cover volumetric turbine flowmeters having an electrical output. The flowmeters are used to measure either flow rate or quantity of liquids, and can be either self-generating or modulating. Their use in cryogenic fluids will require special considerations, which are not fully described herein.

Purpose

This document establishes the following for turbine flowmeters, especially those 2-inch diameter and smaller.

Recommended minimum information to be specified in ordering.

Recommended acceptance and qualification test methods including calibration techniques.

Uniform terminology and drawing symbols.

Recommended installation techniques.