PD ISO/TR 12767:2007
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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
Hardcopy , PDF
27-09-2023
English
28-09-2007
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Effect of errors on flowrate calculations
5.1 General
5.2 Quantifiable effect
6 Effects of deviations in construction
6.1 Orifice-plate edge sharpness
6.2 Thickness of orifice edge
6.3 Condition of upstream and downstream faces of
orifice plate
6.4 Position of pressure tappings for an orifice
6.5 Condition of pressure tappings
7 Effects of pipeline near the meter
7.1 Pipe diameter
7.2 Steps and taper sections
7.3 Diameter of carrier ring
7.4 Undersize joint rings
7.5 Protruding welds
7.6 Eccentricity
8 Effects of pipe layout
8.1 General
8.2 Discharge coefficient compensation
8.3 Pressure tappings
8.4 Devices for improving flow conditions
9 Operational deviations
9.1 General
9.2 Deformation of an orifice plate
9.3 Deposition on the upstream face of an orifice plate
9.4 Deposition in the meter tube
9.5 Orifice-plate edge sharpness
9.6 Deposition and increase of surface roughness in
Venturi tubes
10 Pipe roughness
10.1 General
10.2 Upstream pipe
10.3 Downstream pipe
10.4 Reduction of roughness effects
10.5 Maintenance
Bibliography
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