AS ISO 5167.2:2023 identically adopts ISO 5167 2:2022, which 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
Table of contents
Header
About this publication
Preface
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
5.1.1 General
5.1.2 General shape
5.1.2.1
5.1.2.2
5.1.2.3
5.1.3 Upstream face A
5.1.3.1
5.1.3.2
5.1.3.3
5.1.4 Downstream face B
5.1.4.1
5.1.4.2
5.1.4.3
5.1.5 Thicknesses E and e
5.1.5.1
5.1.5.2
5.1.5.3
5.1.5.4
5.1.6 Angle of bevel, α
5.1.6.1
5.1.6.2
5.1.7 Edges G, H and I
5.1.7.1
5.1.7.2
5.1.7.3
5.1.7.4
5.1.7.5
5.1.8 Diameter of orifice, d
5.1.8.1
5.1.8.2
5.1.8.3
5.1.9 Bidirectional plates
5.1.9.1
5.1.9.2
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
5.2.2.1
5.2.2.2
5.2.2.3
5.2.2.4
5.2.2.5
5.2.2.6
5.2.2.7
5.2.2.8
5.2.2.9
5.2.2.10
5.2.3 Orifice plate with corner tappings
5.2.3.1
5.2.3.2
5.2.3.3
5.2.3.4
5.2.3.5
5.2.3.6
5.2.3.7
5.2.3.8
5.2.3.9
5.2.3.10
5.3 Coefficients and corresponding uncertainties of orifice plates
5.3.1 Limits of use
5.3.2 Coefficients
5.3.2.1 Discharge coefficient, C
5.3.2.2 Expansibility [expansion] factor, ε
5.3.3 Uncertainties
5.3.3.1 Uncertainty of discharge coefficient C
5.3.3.2 Uncertainty of expansibility [expansion] factor ε
5.4 Pressure loss, Δϖ
5.4.1
5.4.2
5.4.3
6 Installation requirements
6.1 General
6.2 Minimum upstream and downstream straight lengths for installation between various fittings and the orifice plate
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
6.2.8
6.2.9
6.2.9.1
6.2.9.2
6.2.9.3
6.3 Flow conditioners
6.3.1 General
6.3.2 19-tube bundle flow straightener (1998)
6.3.2.1 Description
6.3.2.1.1 Design
6.3.2.1.2 Tubing of the 19-tube bundle flow straightener (1998)
6.3.2.1.3 Fabrication of the 19-tube bundle flow straightener (1998)
