GB/T 21844-2008 (English Version) PDF

Standard No.: GB/T 21844-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 21844-2008

Scope: This standard specifies the determination method for the upper limit and lower limit concentration of the flammable mixture formed by the vapor of the chemical substance and air under the test temperature and normal pressure. Inert gases can be used as diluents in the test, but substances that are more oxidizing than air cannot be used. This standard applies to vapor and gaseous substances. Note 1: The lower flammability limit (LFL) and the upper flammability limit (UFL) are sometimes referred to as the lower explosion limit (LEL) and the upper explosion limit (UEL), respectively. However, LEL and UEL can sometimes also express concentration, but not the limit defined in this standard, so when referring to LEL and UEL, be sure to clarify their exact definition.

GB/T 21844-2008 Referenced Document

ASTM E1445 Standard Terminology Relating to Hazardous Potential of Chemicals
ASTM E1515 Standard Test Method for Minimum Explosible Concentration of Combustible Dusts*， 2022-06-01 Update
ASTM E171 Standard Specification for Standard Atmospheres for Conditioning and Testing Flexible Barrier Materials
ASTM E2079 Standard Test Methods for Limiting Oxygen (Oxidant) Concentration in Gases and Vapors*， 2019-07-01 Update
ASTM E582 Standard Test Method for Minimum Ignition Energy and Quenching Distance in Gaseous Mixtures
NFPA 69 Standard on Explosion Prevention Systems Effective Date: 6/24/2007

2008 GB/T 21844-2008 Standard test method for concentration limits of flammability of chemicals(vapors and gases)