BS EN ISO 4589-2:2017
$167.15
Plastics. Determination of burning behaviour by oxygen index – Ambient-temperature test
| Published By | Publication Date | Number of Pages |
| BSI | 2017 | 36 |
This document specifies methods for determining the minimum volume fraction of oxygen, in admixture with nitrogen, that will support combustion of small vertical test specimens under specified test conditions. The results are defined as oxygen index (OI) values.
Methods are provided for testing materials that are self-supporting in the form of vertical bars or sheets up to 10,5 mm thick. These methods are suitable for solid, laminated or cellular materials characterized by an apparent density 100 kg/m3 or greater. The methods might also be applicable to some cellular materials having an apparent density of less than 100 kg/m3. A method is provided for testing flexible sheets or film materials while supported vertically.
For comparative purposes, a procedure is provided for determining whether or not the OI of a material lies above some specified minimum value.
NOTE It might not be possible to apply these methods satisfactorily to materials that exhibit high levels of shrinkage when heated, e.g. highly oriented thin film.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 4 | European foreword |
| 7 | Foreword |
| 8 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions |
| 10 | 4 Principle 5 Apparatus 5.1 Test chimney 5.2 Test specimen holder |
| 14 | 5.3 Gas supplies |
| 15 | 5.4 Gas control devices 5.5 Oxygen analyser 5.6 Flame igniter 5.7 Timing device |
| 16 | 5.8 Fume extraction system 5.9 Tool for preparing rolled film 6 Calibration of equipment 7 Preparation of test specimens 7.1 Sampling |
| 17 | 7.2 Test specimen dimensions and preparation |
| 19 | 7.3 Marking of test specimens 7.3.1 General 7.3.2 Marks for testing by top surface ignition 7.3.3 Marks for testing by propagating ignition 7.4 Conditioning |
| 20 | 8 Procedure for determination of oxygen index 8.1 General 8.2 Setting up the apparatus and test specimen |
| 21 | 8.3 Igniting the test specimen 8.3.1 General 8.3.2 Procedure A — Top surface ignition 8.3.3 Procedure B — Propagating ignition 8.4 Assessing the burning behaviour of individual test specimens |
| 22 | 8.5 Selecting successive volume fractions of oxygen |
| 23 | 8.6 Determining the preliminary volume fraction of oxygen 8.7 Volume fraction of oxygen changes |
| 24 | 9 Calculations and expression of results 9.1 Oxygen index |
| 25 | 9.2 Determination of k 9.3 Standard deviation of oxygen volume fraction measurements |
| 26 | 9.4 Precision of results |
| 27 | 10 Comparison with a specified minimum value of the oxygen index (short procedure) 10.1 General 10.2 Setting up the apparatus and test specimen 10.3 Igniting the test specimen 10.4 Assessing the burning behaviour of the test specimens 10.5 Expressing of results 11 Test report |
| 28 | Annex A (normative) Calibration of equipment |
| 30 | Annex B (normative) Calculation of volume fraction of oxygen |
| 31 | Annex C (informative) Typical test results sheet |
| 33 | Annex D (informative) Results obtained by interlaboratory trials on type VI specimens |
| 34 | Annex E (informative) Precision data obtained from an interlaboratory trial carried out in 1978-1980 |
| 35 | Bibliography |
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BS EN ISO 4589-2:2017 – TC:2020 Edition
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