ISA-RP31.1:1977

Establishes minimum ordering information; recommended acceptance, and qualification test methods, including calibration techniques; uniform terminology and drawing symbols; and recommended installation techniques for volumetric turbine flow transducers having an electrical output.Scope: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