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BS EN ISO 5167-3:2022 – TC:2023 Edition

BS EN ISO 5167-3:2022 – TC:2023 Edition

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Tracked Changes. Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full – Nozzles and Venturi nozzles

Published By Publication Date Number of Pages
BSI 2023 116
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This document specifies the geometry and method of use (installation and operating conditions) of nozzles and Venturi nozzles when they are inserted in a conduit running full to determine the flowrate of the fluid flowing in the conduit. This document also provides background information for calculating the flowrate and is applicable in conjunction with the requirements given in ISO 5167?1. This document is applicable to nozzles and Venturi nozzles in which the flow remains subsonic throughout the measuring section and where the fluid can be considered as single-phase. In addition, each of the devices can only be used within specified limits of pipe size and Reynolds number. It is not applicable to the measurement of pulsating flow. It does not cover the use of nozzles and Venturi nozzles in pipe sizes less than 50 mm or more than 630 mm, or where the pipe Reynolds numbers are below 10 000. This document deals with a) three types of standard nozzles: 1)    ISA 1932[1] nozzle; 2)    the long radius nozzle[2]; 3)    the throat-tapped nozzle b) the Venturi nozzle. The three types of standard nozzle are fundamentally different and are described separately in this document. The Venturi nozzle has the same upstream face as the ISA 1932 nozzle, but has a divergent section and, therefore, a different location for the downstream pressure tappings, and is described separately. This design has a lower pressure loss than a similar nozzle. For all of these nozzles and for the Venturi nozzle direct calibration experiments have been made, sufficient in number, spread and quality to enable coherent systems of application to be based on their results and coefficients to be given with certain predictable limits of uncertainty.   [1]   ISA is the abbreviation for the International Federation of the National Standardizing Associations, which was superseded by ISO in 1946. [2] The long radius nozzle differs from the ISA 1932 nozzle in shape and in the position of the pressure tappings.

PDF Catalog

PDF Pages PDF Title
1 30465340
66 A-30453967
67 National foreword
69 European foreword
72 Foreword
73 Introduction
74 1 Scope
2 Normative references
75 3 Terms and definitions
4 Principles of the method of measurement and computation
76 5 Nozzles and Venturi nozzles
5.1 ISA 1932 nozzle
5.1.1 General shape
5.1.2 Nozzle profile
78 5.1.3 Downstream face
5.1.4 Material and manufacture
5.1.5 Pressure tappings
80 5.1.6 Coefficients of ISA 1932 nozzles
81 5.1.7 Uncertainties
5.1.8 Pressure loss, Δϖ
82 5.2 Long radius nozzles
5.2.1 General
5.2.2 Profile of high-ratio nozzle
84 5.2.3 Profile of low-ratio nozzle
85 5.2.4 Material and manufacture
5.2.5 Pressure tappings
5.2.6 Coefficients of long radius nozzles
86 5.2.7 Uncertainties
5.2.8 Pressure loss, Δϖ
5.3 Throat-tapped nozzles
5.3.1 General
87 5.3.2 Profile of throat-tapped nozzle
88 5.3.3 Material and manufacturing
5.3.4 Pressure tappings
89 5.3.5 Coefficients
5.3.6 Uncertainties
90 5.3.7 Calibration and extrapolation
5.3.8 Pressure Loss
91 5.4 Venturi nozzles
5.4.1 General shape
93 5.4.2 Material and manufacture
5.4.3 Pressure tappings
94 5.4.4 Coefficients
95 5.4.5 Uncertainties
5.4.6 Pressure loss
96 6 Installation requirements
6.1 General
6.2 Minimum upstream and downstream straight lengths for installation between various fittings and the primary device
102 6.3 Flow conditioners
6.4 Circularity and cylindricality of the pipe
103 6.5 Location of primary device and carrier rings
104 6.6 Method of fixing and gaskets
7 Flow calibration of nozzles
7.1 General
105 7.2 Test facility
7.3 Meter installation
7.4 Design of the test programme
7.5 Reporting the calibration results
7.6 Uncertainty analysis of the calibration
7.6.1 General
7.6.2 Uncertainty of the test facility
106 7.6.3 Uncertainty of the nozzle
107 Annex A (informative) Tables of discharge coefficients and expansibility [expansion] factors
113 Annex B (informative) Akashi type (Mitsubishi type) flow conditioner
114 Bibliography

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BS EN ISO 5167-3:2022 - TC
$246.62