GOST 8.586.3-2005 PDF

Full title and description

GOST 8.586.3-2005. Государственная система обеспечения единства измерений. Измерение расхода и количества жидкостей и газов с помощью стандартных сужающих устройств. Часть 3. Сопла и сопла Вентури. Технические требования. (English: State system for ensuring the uniformity of measurements — Measurement of flow rate and quantity of liquids and gases by means of standard pressure-differential devices — Part 3: Nozzles and Venturi nozzles — Technical requirements). This part establishes geometric, surface‑finish and application requirements for ISA 1932 nozzles, elliptic nozzles and Venturi nozzles used in circular pipelines for determining flow and quantity of liquids and gases.

Abstract

This standard specifies technical requirements (geometry, tolerances, throat and inlet/outlet profiles, surface roughness, dimensional verification and conditions of use) for standard nozzles and Venturi nozzles installed in full‑pipe, circular cross‑section conduits to ensure reproducible and traceable differential‑pressure flow measurements. It is a national adoption/harmonization of ISO 5167‑3:2003 and is intended to be used together with the other parts of the GOST 8.586 series and the general principles of GOST 8.586.1.

General information

• Status: Active / implemented national standard (part of the GOST 8.586(1–5)–2005 series).
• Publication date: Adopted/activated December 9, 2005; implementation/entry into force commonly shown as January 1, 2007.
• Publisher: Published under the State system for ensuring the uniformity of measurements (GSI) — national authority: Federal Agency on Technical Regulating and Metrology (Rosstandart) / Gosstandart framework.
• ICS / categories: Metrology & measurement; ICS reference shown as 17.020 (metrology).
• Edition / version: GOST 8.586.3-2005 (harmonized with ISO 5167-3:2003); includes amendments noted in publisher catalogues (e.g., Amd. 6.07).
• Number of pages: Source listings indicate approximately 33–34 pages (catalogue variations exist between publishers).

Scope

The standard applies to ISA 1932 nozzles, elliptic nozzles and Venturi nozzles installed in full‑pipe circular conduits for measurement of flow rate and quantity of liquids and gases. It defines required geometric parameters, manufacturing and inspection tolerances, surface finish limits, recommended installation/clearance conditions and limits of applicability for reliable use without individual calibration (within specified Reynolds/diameter limits). It is intended to be used together with the general principles in Part 1 and the measurement procedure in Part 5 of the GOST 8.586 series.

Key topics and requirements

• Definitions and classification of nozzle types covered: ISA 1932 (standard nozzle), elliptic nozzles (two relative throat‑diameter ranges) and Venturi nozzles.
• Geometric parameters and tolerances for throat diameter, throat length, convergent/divergent profiles and allowable deviations (tight dimensional control for throat diameter and cylindricity).
• Surface roughness limits for internal surfaces (example: internal surface finish requirement cited as Ra ≤ 10−4·d for certain nozzle types) and requirements for inlet/outlet face flatness and edge radii where specified.
• Manufacturing and inspection procedures: measurement of diameters in multiple directions, cylindricity checks, profile verification (templates or measurement), and limits on wall thickness and clearances to the instrumentation tube.
• Conditions of use and applicability: recommended ranges of diameter ratios, Reynolds number considerations and reference to the corresponding ISO 5167 parts for limits of uncalibrated use.

Typical use and users

Primary users are metrology and calibration laboratories, flow‑meter manufacturers, pipeline and process engineers in oil & gas, chemical and utility sectors, and organizations performing custody transfer or fiscal metering where differential‑pressure devices are used. The standard is applied during design, manufacture, acceptance testing and on‑site verification of nozzles and Venturi nozzles and when setting up measurement complexes in accordance with the GOST 8.586 series.

Related standards

Closely related documents include: GOST 8.586.1-2005 (Part 1 — principles and general requirements), GOST 8.586.2-2005 (Part 2 — orifice plates), GOST 8.586.4-2005 (Part 4 — Venturi tubes), GOST 8.586.5-2005 (Part 5 — measurement technique/procedure), and the ISO 5167 series (ISO 5167‑1/2/3/4/5). These documents are intended to be used together for comprehensive differential‑pressure flow measurement practice.

Keywords

flow measurement; differential‑pressure devices; nozzle; Venturi nozzle; ISA 1932; elliptic nozzle; throat diameter; surface roughness; metrology; GOST 8.586; ISO 5167.

FAQ

Q: What is this standard?

A: GOST 8.586.3‑2005 is the Russian (GOST) national standard that sets technical requirements for nozzles and Venturi nozzles used for measuring the flow rate and quantity of liquids and gases by differential‑pressure methods; it is harmonized with ISO 5167‑3:2003.

Q: What does it cover?

A: It covers geometric characteristics, manufacturing and inspection tolerances, surface finish limits, dimensional verification methods and conditions of application for ISA 1932 nozzles, elliptic nozzles and Venturi nozzles installed in circular pipelines for flow/quantity determination.

Q: Who typically uses it?

A: Metrology and calibration laboratories, flow‑meter and nozzle manufacturers, process and pipeline engineers, custody transfer and billing metering organizations, and regulators or test houses involved in flow measurement accuracy and conformity.

Q: Is it current or superseded?

A: As catalogued in public standards databases, GOST 8.586.3‑2005 is listed as the national implementation of ISO 5167‑3:2003 and is shown as active/implemented (activation Dec 9, 2005; common implementation date Jan 1, 2007). No authoritative source consulted in this summary indicates an official supersession as of the cited catalogue entries; users should check the national registries (Rosstandart) for the most recent status before compliance work.

Q: Is it part of a series?

A: Yes — it is Part 3 of the GOST 8.586(1–5)‑2005 series addressing differential‑pressure standard devices; other parts cover general principles (Part 1), orifice plates (Part 2), Venturi tubes (Part 4) and measurement technique (Part 5).

Q: What are the key keywords?

A: Nozzle, Venturi nozzle, ISA 1932, elliptic nozzle, throat diameter, surface roughness, differential pressure, flow measurement, GOST 8.586, ISO 5167.