NF X10-112

NF X10-112

September 1977
Published document Cancelled

Measurement of fluid flow in closed conduites.velocity area method using pitot static tubes.

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Main informations

Collections

National standards and national normative documents

Publication date

September 1977

Number of pages

47 p.

Reference

NF X10-112

ICS Codes

17.120.10   Flow in closed conduits

Classification index

X10-112

Print number

1 - 01/10/1977

International kinship

ISO 3966:1977
Standard replaced by (1)
NF ISO 3966
August 2021
Standard Current
Measurement of fluid flow in closed conduits - Velocity area method using Pitot static tubes

This document specifies a method for the determination in a closed conduit of the volume rate of flow of a regular flow a) of a fluid of substantially constant density or corresponding to a Mach number not exceeding 0,25, b) with substantially uniform stagnation temperature across the measuring cross-section, c) running full in the conduit, and d) under steady flow conditions. In particular, it deals with the technology and maintenance of Pitot static tubes, with the calculation of local velocities from measured differential pressures and with the computation of the flow rate by velocity integration.

Table of contents
  • 1. GÉNÉRALITÉS
    2
  • 2. PRINCIPE DE LA METHODE D'EXPLORATION DU CHAMP DES VITESSES
    3
  • 3. CONCEPTION DES TUBES DE PITOT
    6
  • 4. CONDITIONS D'UTILISATION DES TUBES DE PITOT
    7
  • 5. MISE EN PLACE DU TUBE DE PITOT
    10
  • 6. CALCUL DE LA VITESSE
    10
  • 7. DÉTERMINATION DE LA VITESSE DÉBITANTE PAR INTÉGRATION GRAPHIQUE DU CHAMP DES VITESSES
    12
  • 8. DÉTERMINATION DE LA VITESSE DÉBITANTE PAR INTÉGRATION NUMÉRIQUE DU CHAMP DES VITESSES
    15
  • 9. DÉTERMINATION DE LA VITESSE DÉBITANTE PAR LES MÉTHODES ARITHMÉTIQUES
    17
  • 10. CORRECTIONS SUR LA MESURE DE LA VITESSE LOCALE
    20
  • 11. ERREURS
    24
  • ANNEXE A : EXEMPLES DE TUBES DE PITOT
    30
  • ANNEXE B : CORRECTION DE POSITION À APPORTER LORS D'UN MESURAGE EN ÉCOULEMENT COMPORTANT UN GRADIENT DE VITESSE
    35
  • ANNEXE C : ÉTUDE CONCERNANT LA CORRECTION DE TURBULENCE
    37
  • ANNEXE D : AMORTISSEMENT DES MANOMÈTRES
    39
  • ANNEXE E : MESURES EFFECTUÉES À L'AIDE D'UN TUBE DE PITOT DANS UN FLUIDE COMPRESSIBLE
    40
  • ANNEXE F : DÉTERMINATION DU COEFFICIENT m POUR L'EXTRAPOLATION AU VOISINAGE DE LA PAROI
    44
  • ANNEXE G : EXEMPLE DE CALCUL DE L'ERREUR-LIMITE SUR LA MESURE DU DÉBIT À L'AIDE DE TUBES DE PITOT
    45
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