ISO 10156:2017
Gas cylinders — Gases and gas mixtures — Determination of fire potential and oxidizing ability for the selection of cylinder valve outlets
ISO 10156:2017 specifies methods for determining whether or not a gas or gas mixture is flammable in air and whether a gas or gas mixture is more or less oxidizing than air under atmospheric conditions.
ISO 10156:2017 is intended to be used for the classification of gases and gas mixtures including the selection of gas cylinder valve outlets.
ISO 10156:2017 does not cover the safe preparation of these mixtures under pressure and at temperatures other than ambient.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and units
4 Flammability of gases and gas mixtures in air
4.1 General
4.2 Test method
4.2.1 Key points concerning safety
4.2.2 Principle
4.2.3 Test apparatus and materials
4.2.4 Procedure for determination of flammability
4.2.5 Procedure for determination of flammability limits
4.2.6 Results for pure gases
4.3 Calculation method for flammability of gas mixtures containing n flammable gases and p inert gases
4.4 Examples
4.5 Calculation method for lower flammability limit of gas mixtures
4.5.1 General
4.5.2 Mixtures of flammable gases and mixtures of flammable gases with nitrogen and/or air
4.5.3 Mixtures of flammable gases with inert gases other than nitrogen and air
4.6 Examples
4.7 Classification according to the Globally Harmonized System (GHS)
5 Oxidizing power of gases and gas mixtures
5.1 General
5.2 Test method
5.2.1 Key points concerning safety
5.2.2 Principle
5.2.3 Test apparatus
5.2.4 Procedure
5.2.5 Results
5.3 Calculation method
5.3.1 Principle
5.3.2 Ci coefficients
6 Mixtures containing oxygen and flammable gases
6.1 General
6.2 Basis of flammability classification
6.3 Examples
Annex A (informative) Classification according to the Globally Harmonized System (GHS)
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and units
4 Flammability of gases and gas mixtures in air
4.1 General
4.2 Test method
4.2.1 Key points concerning safety
4.2.2 Principle
4.2.3 Test apparatus and materials
4.2.4 Procedure for determination of flammability
4.2.5 Procedure for determination of flammability limits
4.2.6 Results for pure gases
4.3 Calculation method for flammability of gas mixtures containing n flammable gases and p inert gases
4.4 Examples
4.5 Calculation method for lower flammability limit of gas mixtures
4.5.1 General
4.5.2 Mixtures of flammable gases and mixtures of flammable gases with nitrogen and/or air
4.5.3 Mixtures of flammable gases with inert gases other than nitrogen and air
4.6 Examples
4.7 Classification according to the Globally Harmonized System (GHS)
5 Oxidizing power of gases and gas mixtures
5.1 General
5.2 Test method
5.2.1 Key points concerning safety
5.2.2 Principle
5.2.3 Test apparatus
5.2.4 Procedure
5.2.5 Results
5.3 Calculation method
5.3.1 Principle
5.3.2 Ci coefficients
6 Mixtures containing oxygen and flammable gases
6.1 General
6.2 Basis of flammability classification
6.3 Examples
Annex A (informative) Classification according to the Globally Harmonized System (GHS)
Bibliography