1 Scope
This standard specifies test methods for determination of the minimum oxygen concentration (limiting oxygen index) required for the specimen to exactly maintain burning where the specimen is placed at vertical test condition and in oxygen-nitrogen mixture gas flow.
This standard is applicable to the determination of the burning behavior of various single-component or multi-component textiles such as woven fabric, knitted fabric, non-woven fabric, coated fabric, laminated fabric, compound fabric and carpets (including flame retardant treated and untreated ones).
This standard is only used for determination of burning behavior of textures under the laboratory conditions to control product quality, or only used as one of fire factors for analysis on certain special-purpose material, but not as the evaluation basis of fire hazards under actual service conditions.
2 Normative References
The provisions of the following standards, through reference into this standard, constitute provisions of this standard. At the time of publication, all the editions indicated are valid. All standards are subject to revision, and all parties using this standard are encouraged to study whether the latest editions of these standards apply.
GB 6529-86 Standard Atmospheres for Textiles Conditioning and Testing
3 Definitions
For the purposes of this standard, the following definitions apply.
3.1 afterflame time
the persistent flaming time of material after ignition source is removed under specified test conditions
Foreword i
1 Scope
2 Normative References
3 Definitions
4 Principles
5 Health and Safety of the Test Personnel
6 Apparatus and Materials
7 Specimen and Humidifying
8 Test Procedure
9 Calculation and Expression of Results
10 Test Report
Annex A (Normative) Calculation of Oxygen Concentration
Annex B (Informative) Relationship between Oxygen Concentration and Oxygen/Nitrogen Flow Rate
Annex C (Informative) Correction of Apparatus
Annex D (Informative) Example of Test Result
