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Standard Test Method for Temperature Limit of Flammability of Chemicals
Automaticky přeložený název:
Standardní zkušební metoda pro teploty Limit hořlavosti chemických látek
NORMA vydána dne 1.10.2013
Označení normy: ASTM E1232-07(2013)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.10.2013
Kód zboží: NS-40953
Počet stran: 11
Přibližná hmotnost: 33 g (0.07 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Zápalnost a hořlavost materiálů a výrobků
Výrobky chemického průmyslu obecně
Keywords:
ICS Number Code 13.220.40 (Ignitability and burning behaviour of materials and products), 71.100.01 (Products of the chemical industry in general)
Significance and Use | ||||||||||||||||||||||
5.1 The lower temperature limit of flammability is the minimum temperature at which a liquid (or solid) chemical will evolve sufficient vapors to form a flammable mixture with air under equilibrium conditions. Knowledge of this temperature is important in determining guidelines for the safe handling of chemicals, particularly in closed process and storage vessels. 5.2 The vapor concentration present
at the lower temperature limit of flammability equals the lower
flammable limit concentration as measured by Test Method E681 and
extrapolated back to the same temperature. (This permits estimation
of lower temperature limits of flammability if vapor pressure and
concentration limit of flammability data are available
(1.1 This test method covers the
determination of the minimum temperature at which vapors in
equilibrium with a liquid (or solid) chemical will be sufficiently
concentrated to form flammable mixtures in air at atmospheric
pressure. This test method is written specifically for
determination of the temperature limit of flammability of systems
using air as the source of oxidant and diluent. It may also be used
for other oxidant/diluent combinations, including air plus diluent
mixtures; however, no oxidant/diluent combination stronger than air
should be used. Also, no unstable chemical capable of explosive
decomposition reactions should be tested (see 8.3).
1.2 This test method is designed and written to be run at local ambient pressure and is limited to a maximum initial pressure of 1 atm abs. It may also be used for reduced pressures with the practical lower pressure limit being approximately 13.3 kPa (100 mm Hg). The maximum practical operating temperature of this equipment is approximately 150°C (302°F) (Note A1.2). 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units are provided for information only and are not considered standard. 1.4 This standard should be used to measure and describe the properties of materials, products, or assemblies in response to heat and flame under controlled laboratory conditions, and should not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use. 1.5 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.
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