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BS EN ISO 5167-2:2022

BS EN ISO 5167-2:2022

$198.66

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 64
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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
2 undefined
4 European foreword
Endorsement notice
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms, definitions and symbols
10 4 Principles of the method of measurement and computation
5 Orifice plates
5.1 Description
5.1.1 General
5.1.2 General shape
11 5.1.3 Upstream face A
12 5.1.4 Downstream face B
5.1.5 Thicknesses E and e
13 5.1.6 Angle of bevel, α
5.1.7 Edges G, H and I
5.1.8 Diameter of orifice, d
14 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
16 5.2.3 Orifice plate with corner tappings
19 5.3 Coefficients and corresponding uncertainties of orifice plates
5.3.1 Limits of use
20 5.3.2 Coefficients
21 5.3.3 Uncertainties
22 5.4 Pressure loss, Δϖ
23 6 Installation requirements
6.1 General
24 6.2 Minimum upstream and downstream straight lengths for installation between various fittings and the orifice plate
29 6.3 Flow conditioners
6.3.1 General
6.3.2 19-tube bundle flow straightener (1998)
35 6.3.3 The Zanker flow conditioner plate
36 6.4 Circularity and cylindricality of the pipe
37 6.5 Location of orifice plate and carrier rings
38 6.6 Method of fixing and gaskets
7 Flow calibration of orifice meters
7.1 General
39 7.2 Test facility
7.3 Meter installation
7.4 Design of the test programme
7.5 Reporting the calibration results
40 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
41 Annex A (informative) Tables of discharge coefficients and expansibility [expansion] factors
55 Annex B (informative) Flow conditioners
60 Bibliography

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BS EN ISO 5167-2:2022
$198.66