SN EN ISO 5167-2 : 2003

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Principles of the method of measurement and computation
5 Orifice plates
   5.1 Description
   5.2 Pressure tappings
   5.3 Coefficients and corresponding uncertainties of
        orifice plates
   5.4 Pressure loss, delta[omega]
6 Installation requirements
   6.1 General
   6.2 Minimum upstream and downstream straight lengths
        for installation between various fittings and the
        orifice plate
   6.3 Flow conditioners
   6.4 Circularity and cylindricality of the pipe
   6.5 Location of orifice plate and carrier rings
   6.6 Method of fixing and gaskets
Annex A (informative) Tables of discharge coefficients
         and expansibility [expansion] factors
Annex B (informative) Flow conditioners
Bibliography

Defines the geometry and method of use (installation and operating conditions) of orifice plates when they are inserted in a conduit running full to determine the flow-rate of the fluid flowing in the conduit.