GB/T 3836.11-2022 Explosive atmospheres—Part 11:Material characteristics for gas and vapour classification—Test methods and data

Scope

This document specifies the test methods and classification principles for determining the maximum experimental safety gap (MESG) of gas/air mixtures or vapor/air mixtures under normal temperature and pressure conditions (20 °C, 101.3 kPa), providing guidance for the classification of gases and vapors. The document also provides the characteristic parameters of common flammable gases and vapors to facilitate the selection of appropriate equipment categories. It also stipulates the test methods for determining the auto-ignition temperature (AIT) of vapor/air or gas/air mixtures under atmospheric pressure, enabling the selection of appropriate equipment temperature groups. The chemical characteristics of the substances provided assist in selecting equipment suitable for use in hazardous areas. When validated test results are available, additional data can be added.
The selection of substance characteristics contained in Table B.1 of Appendix B particularly takes into account the use of equipment in hazardous areas.
The data in this document come from some of the references listed in the bibliography.
These methods for determining MESG or AIT can also be used for gas/air/inert gas mixtures or vapor/air/inert gas mixtures. However, data on air/inert gas mixtures are not listed.

Development Information

Same series standard

Replace the following standards

Referenced Standards

Adopt standards

Related Standards