UNI EN ISO 5167-2 : 2004
Withdrawn
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MEASUREMENT OF FLUID FLOW BY MEANS OF PRESSURE DIFFERENTIAL DEVICES INSERTED IN CIRCULAR CROSS-SECTION CONDUITS RUNNING FULL - PART 2: ORIFICE PLATES
22-09-2022
01-10-2004
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
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