GOST 8.586.5-2005 PDF

Full title and description

GOST 8.586.5-2005 — Государственная система обеспечения единства измерений. Измерение расхода и количества жидкостей и газов с помощью стандартных сужающих устройств. Часть 5. Методика выполнения измерений. This part of the GOST 8.586(1–5)-2005 series specifies the measurement procedure (methodology) for determining flow rate and quantity of liquids and gases when using standard orifice-type flow-restricting devices and associated measurement equipment.

Abstract

This standard sets out the practical measurement procedure for flowrate and quantity determination using standard orifice devices (diaphragms, nozzles, Venturi elements and similar restricting devices). It covers the required measuring hardware (standard restricting device, metering pipe, differential-pressure transducers, instruments for medium state parameters), connecting lines, auxiliary devices and the data processing procedures necessary to obtain flow and quantity values and to assess measurement uncertainty.

General information

• Status: Active (in force).
• Publication date: Adopted 9 December 2005; introduced into force as a national standard 1 January 2007.
• Publisher: Interstate Council for Standardization, Metrology and Certification (EASC); implemented nationally by the Federal Agency on Technical Regulation and Metrology (Rosstandart) / publishing bodies for national standards.
• ICS / categories: 17.020 — Metrology and measurement; measurement of flow of liquids and gases.
• Edition / version: GOST 8.586.5-2005 (part of the GOST 8.586.1–5-2005 series). Includes subsequent editorial corrections/amendments issued after 2005.
• Number of pages: Approximately 94 pages (typical published edition).

Scope

The standard defines the measurement procedure for determining instantaneous flow rate and cumulative quantity of liquids and gases using standard narrowing (orifice) devices and associated measurement systems. It applies to the measurement chain comprising the standard restricting device, metering pipeline, differential-pressure measuring means, instruments for medium state parameters (temperature, pressure, composition where relevant), connecting lines and data processing systems. The standard is intended for design, verification and operational measurement activities where orifice-type devices are used for custody transfer, process control and metrological assurance.

Key topics and requirements

• Specification of the measurement sequence and step-by-step procedure for obtaining flowrate and quantity from differential-pressure readings.
• Requirements for installation geometry and upstream/downstream piping to ensure valid measurement conditions.
• Formulas and calculation algorithms for flowrate and quantity, including discharge coefficients for standard orifices, nozzles and Venturi elements.
• Correction factors and treatment of effects such as pipe roughness and inlet chamfering that influence discharge coefficient and measurement uncertainty.
• Requirements and recommendations for differential-pressure transducers, pressure and temperature sensors, and their connecting lines.
• Data processing, averaging and reporting rules; recording of measurement conditions and results.
• Uncertainty assessment: components to include in uncertainty budget and methods to estimate combined uncertainty of flow and quantity measurements.
• Reference to normative documents and interoperability with ISO 5167-series principles while allowing additional corrective coefficients specific to the GOST approach.

Typical use and users

Applied by metrology laboratories, pipeline and process engineers, custody transfer system designers, utilities and oil & gas companies, calibration houses and regulators. Typical activities include commissioning and verification of flow measurement stations, routine and special measurement campaigns, development and validation of flow-computation software, and preparation of measurement uncertainty reports for commercial and regulatory purposes.

Related standards

Belongs to the GOST 8.586.1–5-2005 series (parts covering principles and general requirements, orifice plates, nozzles, Venturi tubes, and measurement procedure). Normative cross-references typically include national GOSTs on units, surface roughness, fluid state conditions and metrological terminology, as well as the ISO 5167 series and ISO 5168 (uncertainty) which are used as technical bases or points of comparison.

Keywords

flow measurement; orifice; diaphragm; nozzle; Venturi; flowrate; quantity; measurement procedure; metrology; discharge coefficient; uncertainty; differential pressure; metering pipeline.

FAQ

Q: What is this standard?

A: GOST 8.586.5-2005 is the part of the GOST 8.586(1–5)-2005 suite that defines the measurement procedure (methodology) for determining flow rate and quantity of liquids and gases when using standard constricting (orifice-type) devices and the associated measurement chain.

Q: What does it cover?

A: It covers the practical steps, instrument and installation requirements, calculation algorithms (including discharge coefficient usage), correction factors (for roughness, inlet geometry, etc.), data processing rules and approaches to estimating measurement uncertainty for orifice-based flow measurements.

Q: Who typically uses it?

A: Metrologists, pipeline and process engineers, custody-transfer operators, calibration laboratories, equipment manufacturers and regulatory bodies involved in flow measurement of liquids and gases.

Q: Is it current or superseded?

A: The standard was adopted in 2005 and introduced into force (as a national standard) in early 2007. It is published as GOST 8.586.5-2005 and, in practice, has been maintained with corrections/amendments since issuance. Users should check the national standards registry or publisher for the latest status or any newer amendments before formal use.

Q: Is it part of a series?

A: Yes — it is Part 5 of the GOST 8.586.1–5-2005 series on measurement of flow rate and quantity of liquids and gases using standard restricting devices; other parts address principles, orifice plates, nozzles and Venturi tubes.

Q: What are the key keywords?

A: Flow measurement, orifice/diaphragm, nozzle, Venturi, discharge coefficient, differential pressure, metering pipeline, measurement procedure, uncertainty, metrology.