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Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index)
Automaticky přeložený název:
Standardní zkušební metoda pro měření minimální koncentrace kyslíku pro podporu Candle-jako spalování plastů (Oxygen Index)
NORMA vydána dne 1.9.2013
Označení normy: ASTM D2863-13
Poznámka: NEPLATNÁ
Datum vydání normy: 1.9.2013
Kód zboží: NS-21756
Počet stran: 14
Přibližná hmotnost: 42 g (0.09 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
candle-like combustion, minimum oxygen concentration, oxygen, oxygen concentration, oxygen index, ICS Number Code 83.080.01 (Plastics in general)
Significance and Use | ||||||||||||||||||
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 | ||||||||||||||||||
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 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. 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 and health 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.
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