NF EN ISO 5167-1

NF EN ISO 5167-1

June 2003
Standard Cancelled

Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 1 : general principles and requirements

ISO 5167-1:2003 defines terms and symbols and establishes the general principles for methods of measurement and computation of the flowrate of fluid flowing in a conduit by means of pressure differential devices (orifice plates, nozzles and Venturi tubes) when they are inserted into a circular cross-section conduit running full. ISO 5167-1:2003 also specifies the general requirements for methods of measurement, installation and determination of the uncertainty of the measurement of flowrate. It also defines the general specified limits of pipe size and Reynolds number for which these pressure differential devices are to be used.ISO 5167 (all parts) is applicable only to flow that remains subsonic throughout the measuring section and where the fluid can be considered as single-phase. It is not applicable to the measurement of pulsating flow.

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National standards and national normative documents

Publication date

June 2003

Number of pages

41 p.

Reference

NF EN ISO 5167-1

ICS Codes

17.120.10   Flow in closed conduits

Classification index

X10-102-1

Print number

1 - 07/08/2003

International kinship

ISO 5167-1:2003

European kinship

EN ISO 5167-1:2003
Sumary
Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 1 : general principles and requirements

ISO 5167-1:2003 defines terms and symbols and establishes the general principles for methods of measurement and computation of the flowrate of fluid flowing in a conduit by means of pressure differential devices (orifice plates, nozzles and Venturi tubes) when they are inserted into a circular cross-section conduit running full.

ISO 5167-1:2003 also specifies the general requirements for methods of measurement, installation and determination of the uncertainty of the measurement of flowrate. It also defines the general specified limits of pipe size and Reynolds number for which these pressure differential devices are to be used.

ISO 5167 (all parts) is applicable only to flow that remains subsonic throughout the measuring section and where the fluid can be considered as single-phase. It is not applicable to the measurement of pulsating flow.

Replaced standards (2)
NF EN ISO 5167-1
November 1995
Standard Cancelled
Measurement of fluid flow by means of pressure differential devices. Part 1 : orifice plates, nozzles and venturi tubes inserted in circular cross-section conduits running full.

NF EN ISO 5167-1/A1
October 1998
Standard Cancelled
Mesure de débit des fluides au moyen d'appareils déprimogènes - Partie 1 : diaphragmes, tuyères et tubes de venturi insérés dans des conduites en charge de section circulaire

Ce premier amendement à la norme ISO 5167-1:1991, permet un calcul amélioré du coefficient de décharge C. En outre, ce coefficient peut désormais être appliqué pour des nombres de Reynolds rapportés au diamètre de la conduite inférieures à 4 000 d'une part et d'autre part le rapport de diamètre beta = d/D doit être toujours supérieur ou égal à 0,10 et inférieur ou égal à 0,75.

Standard replaced by (1)
NF EN ISO 5167-1
June 2022
Standard Current
Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 1: General principles and requirements

This document defines terms and symbols and establishes the general principles for methods of measurement and computation of the flow rate of fluid flowing in a conduit by means of pressure differential devices (orifice plates, nozzles, Venturi tubes, cone meters, and wedge meters) when they are inserted into a circular cross-section conduit running full. This document also specifies the general requirements for methods of measurement, installation and determination of the uncertainty of the measurement of flow rate. ISO 5167 (all parts) is applicable only to flow that remains subsonic throughout the measuring section and where the fluid can be considered as single-phase. It is not applicable to the measurement of pulsating flow.

Table of contents
  • Avant-propos
    iv
  • Introduction
    v
  • Domaine d'application
    1
  • 2 Références normatives
  • 3 Termes et définitions
    1
  • 4 Symboles et indices
    6
  • 4.1 Symboles
    6
  • 4.2 Indices
    7
  • 5 Principe de la méthode de mesurage et mode de calcul
    7
  • 5.1 Principe de la méthode de mesurage
    7
  • 5.2 Méthode de détermination du rapport des diamètres de l'élément primaire normalisé choisi
    8
  • 5.3 Calcul du débit
    8
  • 5.4 Détermination de la masse volumique, de la pression et de la température
    8
  • 6 Conditions générales pour les mesurages
    10
  • 6.1 Élément primaire
    10
  • 6.2 Nature du fluide
    11
  • 6.3 Conditions de l'écoulement
    11
  • 7 Exigences d'installation
    11
  • 7.1 Généralités
    11
  • 7.2 Longueurs droites minimales d'amont et d'aval
    13
  • 7.3 Exigence générale relative à l'écoulement au voisinage de l'élément primaire
    13
  • 7.4 Conditionneurs d'écoulement (voir aussi l'Annexe C)
    13
  • 8 Incertitudes sur la mesure du débit
    17
  • 8.1 Définition de l'incertitude
    17
  • 8.2 Calcul pratique de l'incertitude
    17
  • Annexe A (informative) Calculs par itération
    19
  • Annexe B (informative) Exemples de valeurs pour la rugosité uniforme équivalente, k, des parois des conduites
    21
  • Annexe C (informative) Conditionneurs d'écoulement et redresseurs d'écoulement
    22
  • Bibliographie
    33
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