NF EN ISO 9300

July 1995

Standard Cancelled

Measurement of gas flow by means of critical flow venturi nozzles.

Main informations

Collections

National standards and national normative documents

Publication date

July 1995

Number of pages

22 p.

Reference

NF EN ISO 9300

ICS Codes

17.120.10 Flow in closed conduits

Classification index

X10-150

Print number

1 - 01/08/1995

International kinship

ISO 9300:1990

European kinship

EN ISO 9300:1995

Replaced standards (1)

NF ISO 9300

December 1990

Standard Cancelled

Measurement of gas flow by means of critical flow venturi nozzles.

Standard replaced by (1)

NF EN ISO 9300

November 2005

Standard Cancelled

Measurement of gas flow by means of critical flow Venturi nozzles

ISO 9300:2005 specifies the geometry and method of use (installation in a system and operating conditions) of critical flow Venturi nozzles (CFVN) used to determine the mass flow-rate of a gas flowing through a system. It also gives the information necessary for calculating the flow-rate and its associated uncertainty. It is applicable to Venturi nozzles in which the gas flow accelerates to the critical velocity at the throat (this being equal to the local sonic velocity), and only where there is steady flow of single-phase gases.

Table of contents

Avant-propos
5
0 Introduction
6
1 Domaine d'application
6
2 Références normatives
7
3 Définitions
8
4 Symboles et abréviations
10
5 Tâches à réaliser
10
5.1 Tâches liées à l'expression du besoin
11
5.2 Tâches liées à l'élaboration de la définition
12
5.3 Tâches liées à l'élaboration des justifications
14
6 Bibliographie
15

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