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ASTM D2863-17a
Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index) (Includes all amendments And changes 10/14/2019).
NORMA vydaná dňa 1.12.2017
Informácie o norme:
Označenie normy: ASTM D2863-17a
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.12.2017
Kód tovaru: NS-806827
Počet strán: 15
Približná hmotnosť: 45 g (0.10 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM D2863-17a :
Keywords:
candle-like combustion, minimum oxygen concentration, oxygen, oxygen concentration, oxygen index,, ICS Number Code 83.080.01 (Plastics in general)
Doplňujúce informácie
| Significance and Use | ||||||||||||||||||
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5.1 This test method provides for the measuring of the minimum concentration of oxygen in a flowing mixture of oxygen and nitrogen that will just support flaming combustion of plastics. Correlation with burning characteristics under actual use conditions is not implied. 5.2 In this test method, the specimens are subjected to one or more specific sets of laboratory test conditions. If different test conditions are substituted or the end-use conditions are changed, it is not always possible by or from this test to predict changes in the fire-test-response characteristics measured. Therefore, the results are valid only for the fire-test-exposure conditions described in this test method. |
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| 1. Scope | ||||||||||||||||||
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1.1 This fire-test-response standard describes a procedure for measuring the minimum concentration of oxygen, expressed as percent volume, that will just support flaming combustion in a flowing mixture of oxygen and nitrogen. 1.2 This test method provides three testing procedures. Procedure A involves top surface ignition, Procedure B involves propagating ignition, and Procedure C is a short procedure involving the comparison with a specified minimum value of the oxygen index. 1.3 Test specimens used for this test method are prepared into one of six types of specimens (see Table 1). 1.4 This test method provides for testing
materials that are structurally self-supporting in the form of
vertical bars or sheet up to 10.5-mm thick. Such materials are
solid, laminated or cellular materials characterized by an apparent
density greater than 15 kg/m3.
1.5 This test method also provides for testing flexible sheet or film materials, while supported vertically. 1.6 This test method is also suitable, in some cases, for cellular materials having an apparent density of less than 15 kg/m3. Note 1: Although this test method has been found applicable
for testing some other materials, the precision of the test method
has not been determined for these materials, or for specimen
geometries and test conditions outside those recommended
herein.
1.7 This test method measures and describes the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions. 1.8 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.10 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. Note 2: This test method and ISO 4589-2 are technically
equivalent when using the gas measurement and control device
described in 6.3.1, with
direct oxygen concentration measurement.
1.11 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||||||||||||||||
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