SA TR ISO 9464-2023 PDF

Full title and description

SA TR ISO 9464:2023 — Guidelines for the use of ISO 5167:2022. Technical Report giving practical guidance on applying the ISO 5167 series for flow measurement based on the differential pressure produced by a constriction in a circular conduit.

Abstract

The objective of this technical report is to provide guidance on the use of the ISO 5167:2022 series. ISO 5167:2022 specifies methods for measuring flow by differential pressure devices (orifice plates, nozzles, Venturi tubes and similar constrictions) introduced into circular conduits. This report explains application rules, clarifies requirements, and gives practical advice on applying the parts of ISO 5167 without providing extended theoretical derivations (users are referred to standard textbooks for theory).

General information

• Status: Published
• Publication date: 20 September 2023
• Publisher: ISO (International Organization for Standardization)
• ICS / categories: 17.120.10 (Flow measurement)
• Edition / version: Edition 3 (ISO/TR 9464:2023)
• Number of pages: 64 pages

Scope

This technical report provides practical guidance for selecting, installing and applying the requirements of the ISO 5167:2022 series for differential-pressure-based flow measurement in circular conduits. It clarifies the application of definitions, symbols and procedural requirements given in ISO 5167-1 and related parts, highlights limitations and typical measurement conditions, and offers recommendations to support consistent, repeatable measurements and uncertainty assessment in industrial and laboratory contexts.

Key topics and requirements

• Guidance on applying the ISO 5167:2022 parts for orifice plates, nozzles and Venturi-type meters.
• Recommendations for selection and installation of differential-pressure constrictions in circular conduits (positioning, upstream/downstream straight lengths, pipe and meter alignment).
• Clarification of definitions, symbols and reference conditions as given in ISO 5167-1:2022.
• Practical notes on measurement uncertainty, calibration and verification practices consistent with ISO guidance.
• Limitations, range of applicability and conditions requiring special attention (e.g., flow profile disturbances, multi-phase flows, Reynolds-number bounds).
• Examples and interpretative guidance to help apply ISO 5167 requirements consistently in field and laboratory situations.

Typical use and users

Used by flow measurement and process engineers, calibration and metrology laboratories, instrument manufacturers, test engineers, custody-transfer specialists and researchers. Typical applications include process flow diagnostics, plant commissioning, calibration/verification of flow meters, and establishing measurement uncertainty and compliance with industry measurement practices.

Related standards

ISO 5167 series (parts covering orifice plates, nozzles, Venturi meters — ISO 5167-1 to -6), ISO 5168 (measurement of uncertainty in flow), and other guidance documents and technical reports relevant to differential-pressure flow measurement. The report is commonly used alongside national and industry documents on flow measurement practice (for example ASME, API and IEC guidance where applicable).

Keywords

ISO 9464, ISO/TR 9464, flow measurement, differential pressure, orifice plate, nozzle, Venturi, ISO 5167, installation guidance, measurement uncertainty, metrology

FAQ

Q: What is this standard?

A: ISO/TR 9464:2023 is a Technical Report titled "Guidelines for the use of ISO 5167:2022" that provides practical guidance on applying the ISO 5167 series for differential-pressure-based flow measurement in circular conduits.

Q: What does it cover?

A: It covers guidance on selecting and installing differential-pressure constrictions (orifice plates, nozzles, Venturi-type meters), interpreting the requirements of ISO 5167:2022, addressing typical measurement issues and assessing measurement uncertainty. It does not provide extended theoretical derivations.

Q: Who typically uses it?

A: Process and instrumentation engineers, flow and calibration laboratories, equipment manufacturers, test engineers and researchers involved in industrial and laboratory flow measurement.

Q: Is it current or superseded?

A: ISO/TR 9464:2023 is the current published edition (Edition 3), published on 20 September 2023. It replaces the earlier ISO/TR 9464:2008 technical report.

Q: Is it part of a series?

A: Yes — it is a companion technical report to the ISO 5167 series (ISO 5167-1 through ISO 5167-6), intended to help apply those parts correctly.

Q: What are the key keywords?

A: Flow measurement, differential pressure, orifice plate, nozzle, Venturi, ISO 5167, installation guidance, measurement uncertainty, metrology.