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NEPLATNÁ ASTM E1226-12a 1.12.2012 náhled

Doplňující informace

ASTM E1226-12a

Standard Test Method for Explosibility of Dust Clouds (Includes all amendments And changes 1/8/2020).

Automaticky přeložený název:

Standardní zkušební metoda pro výbušnosti rozvířeného prachu

NORMA vydána dne 1.12.2012

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Provedení	PDF - okamžité stažení - 1 946.20 Kč Tištěné - 1 946.20 Kč
Dostupnost	SKLADEM
Cena	1 946.20 Kč bez DPH
1 946.20 Kč

Informace o normě:

Označení normy: ASTM E1226-12a
Poznámka: NEPLATNÁ
Datum vydání normy: 1.12.2012
Kód zboží: NS-40934
Počet stran: 13
Přibližná hmotnost: 39 g (0.09 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

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Měření síly, váhy a tlaku

Anotace textu normy ASTM E1226-12a :

Keywords:
dust explosion, explosion pressure, ICS Number Code 13.230 (Explosion protection), 17.100 (Measurement of force, weight and pressure)

Doplňující informace

Significance and Use

5.1 This test method provides a procedure for performing laboratory tests to evaluate deflagration parameters of dusts.

5.2 The data developed by this test method may be used for the purpose of sizing deflagration vents in conjunction with the nomographs and equations published in NFPA 68, ISO 6184/1, or VDI 3673.

5.3 The values obtained by this testing technique are specific to the sample tested and the method used and are not to be considered intrinsic material constants.

5.4 For dusts with low K_St-values, discrepancies have been observed between tests in 20-L and 1-m³ chambers. A strong ignitor may overdrive a 20-L chamber, as discussed in Test Method E1515 and Refs (1-3).⁷

1.1 Purpose. The purpose of this test method is to provide standard test methods for characterizing the “explosibility” of dust clouds in two ways, first by determining if a dust is “explosible,” meaning a cloud of dust dispersed in air is capable of propagating a deflagration, which could cause a flash fire or explosion; or, if explosible, determining the degree of “explosibility,” meaning the potential explosion hazard of a dust cloud as characterized by the dust explosibility parameters, maximum explosion pressure, P_{1.2 Limitations. Results obtained by
the application of the methods of this standard pertain only to
certain combustion characteristics of dispersed dust clouds. No
inference should be drawn from such results relating to the
combustion characteristics of dusts in other forms or conditions
(for example, ignition temperature or spark ignition energy of dust
clouds, ignition properties of dust layers on hot surfaces,
ignition of bulk dust in heated environments, etc.)}

1.3 Use. It is intended that results obtained by application of this test be used as elements of an explosion risk assessment that takes into account other pertinent risk factors; and in the specification of explosion prevention systems (see, for example NFPA 68, NFPA 69, and NFPA 654) when used in conjunction with approved or recognized design methods by those skilled in the art.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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.

2. Referenced Documents

E1445-08(2023)	Standard Terminology Relating to Hazard Potential of Chemicals
E1515-14(2022)	Standard Test Method for Minimum Explosible Concentration of Combustible Dusts
D3173-11	Standard Test Method for Moisture in the Analysis Sample of Coal and Coke
D3175-20	Standard Test Method for Volatile Matter in the Analysis Sample of Coal and Coke
E789-95(2001)	Standard Test Method for Dust Explosions in a 1.2-Litre Closed Cylindrical Vessel (Withdrawn 2007)