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BSI PD ISO/TR 12767:2023

BSI PD ISO/TR 12767:2023

$167.15

Measurement of fluid flow by means of pressure differential devices. Guidelines on the effect of departure from the specifications and operating conditions given in ISO 5167

Published By Publication Date Number of Pages
BSI 2023 44
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PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Symbols
11 5 Effect of errors on flowrate calculations
5.1 General
5.2 Quantifiable effects
6 Effects of deviations in construction
6.1 Orifice-plate edge sharpness
12 6.2 Thickness of orifice edge
13 6.3 Condition of upstream and downstream faces of orifice plate
14 6.4 Position of pressure tappings for an orifice
6.4.1 General
6.4.2 Calculation of discharge coefficient
6.4.3 Estimation of additional uncertainty
6.4.4 Example
15 6.5 Condition of pressure tappings
7 Effects of pipeline near the meter
7.1 Pipe diameter
7.2 Steps and taper sections
16 7.3 Diameter of carrier ring
19 7.4 Undersize joint rings
7.5 Protruding welds
7.6 Eccentricity
21 8 Effects of pipe layout
8.1 General
22 8.2 Discharge coefficient compensation
8.2.1 Corrections
23 8.2.2 Additional uncertainty
24 8.3 Pressure tappings
8.4 Devices for improving flow conditions
9 Operational deviations
9.1 General
25 9.2 Deformation of an orifice plate
9.2.1 General
9.2.2 Elastic deformation
9.2.3 Plastic deformation
26 9.3 Deposition on the upstream face of an orifice plate
30 9.4 Deposition in the meter tube
31 9.5 Orifice-plate edge sharpness
9.5.1 Deterioration
9.5.2 Plate reversal
32 9.6 Deposition and increase of surface roughness in Venturi tubes
9.6.1 General
9.6.2 Deposition
9.6.3 Surface roughness
33 10 Pipe roughness
10.1 General
34 10.2 Upstream pipe
38 10.3 Downstream pipe
10.4 Reduction of roughness effects
10.5 Maintenance
40 Bibliography

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BSI PD ISO/TR 12767:2023
$167.15