ISA-RP31.1-1977 Specification, Installation, and Calibration of Turbine Flowmeters (Downloadable)

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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:

1. Recommended minimum information to be specified in ordering
   
2. Recommended acceptance and qualification test methods including calibration techniques
   
3. Uniform terminology and drawing symbols
   
4. Recommended installation techniques
   

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