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BS EN ISO 5167-2:2022 – TC

BS EN ISO 5167-2:2022 – TC

$258.95

Tracked Changes. Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full – Orifice plates

Published By Publication Date Number of Pages
BSI 2022 170
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This document specifies 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. This document also provides background information for calculating the flow rate and is applicable in conjunction with the requirements given in ISO 5167?1 . This document is applicable to primary devices having an orifice plate used with flange pressure tappings, or with corner pressure tappings, or with D and D/2 pressure tappings. Other pressure tappings such as “vena contracta” and pipe tappings are not covered by this document. This document is applicable only to a flow which remains subsonic throughout the measuring section and where the fluid can be considered as single phase. It is not applicable to the measurement of pulsating flow[1]. It does not cover the use of orifice plates in pipe sizes less than 50 mm or more than 1 000 mm, or where the pipe Reynolds numbers are below 5 000.

PDF Catalog

PDF Pages PDF Title
108 undefined
110 European foreword
Endorsement notice
113 Foreword
114 Introduction
115 1 Scope
2 Normative references
3 Terms, definitions and symbols
116 4 Principles of the method of measurement and computation
5 Orifice plates
5.1 Description
5.1.1 General
5.1.2 General shape
117 5.1.3 Upstream face A
118 5.1.4 Downstream face B
5.1.5 Thicknesses E and e
119 5.1.6 Angle of bevel, α
5.1.7 Edges G, H and I
5.1.8 Diameter of orifice, d
120 5.1.9 Bidirectional plates
5.1.10 Material and manufacture
5.2 Pressure tappings
5.2.1 General
5.2.2 Orifice plate with D and D/2 tappings or flange tappings
122 5.2.3 Orifice plate with corner tappings
125 5.3 Coefficients and corresponding uncertainties of orifice plates
5.3.1 Limits of use
126 5.3.2 Coefficients
127 5.3.3 Uncertainties
128 5.4 Pressure loss, Δϖ
129 6 Installation requirements
6.1 General
130 6.2 Minimum upstream and downstream straight lengths for installation between various fittings and the orifice plate
135 6.3 Flow conditioners
6.3.1 General
6.3.2 19-tube bundle flow straightener (1998)
141 6.3.3 The Zanker flow conditioner plate
142 6.4 Circularity and cylindricality of the pipe
143 6.5 Location of orifice plate and carrier rings
144 6.6 Method of fixing and gaskets
7 Flow calibration of orifice meters
7.1 General
145 7.2 Test facility
7.3 Meter installation
7.4 Design of the test programme
7.5 Reporting the calibration results
146 7.6 Uncertainty analysis of the calibration
7.6.1 General
7.6.2 Uncertainty of the test facility
7.6.3 Uncertainty of the orifice meter
147 Annex A (informative) Tables of discharge coefficients and expansibility [expansion] factors
161 Annex B (informative) Flow conditioners
166 Bibliography

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BS EN ISO 5167-2:2022 - TC
$258.95