Dust Testing Services – The First Step to Avoid Process Explosions

Dust Testing Services for explosibility is a requirement in many process applications to determine whether a powder or dust will explode when exposed to an ignition source when in the form of a dust cloud. The test results in a material being classified as either Type A — Explosible — or Type B — Non-Explosible.

Understanding the characteristics of material being process should be your first step toward obtaining protection for your employees and processing equipment. In some cases, materials used at your process facility may already be documented. However, should there be no documentation for your materials, dust testing of your materials should be made at a facility using ASTM (American Society for Testing and Materials) and ISO (International Standard Organization) procedures.

IEP Technologies will provide dust testing services for your materials using the latest standards and procedures, as will as recommend solutions to avoid the possibility of an explosion in your process.

Combustion Research Center (Dust Testing)At our research center ASTM, DOT, UL, and other recognized test methods are used to characterize the combustion hazard properties of dusts, liquids, and gases. Key properties of combustible dust clouds include ignition sensitivity, IS (minimum ignition temperature, TC; minimum ignition energy, MIE; lower flammable limit, LFL – also called minimum explosible concentration, MEC) and dust cloud explosion severity, ES (maximum explosion pressure, PMAX; and the dust cloud explosibility index, KST).

ASTM E1226 Standard Test Method for Explosibility of Dust Clouds
ASTM E1515 Standard Test Method for Minimum Explosible Concentration of Combustible Dusts
ASTM E2019 Standard Test Method for Minimum Ignition Energy of a Dust Cloud in Air
ASTM E2021 Standard Test Method for Hot-Surface Ignition Temperature of Dust Layers
ASTM E1491 Standard Test Method for Minimum Autoignition Temperature of Dust Clouds
ASTM D93 Standard Test Methods for Flash Point by Pensky-Martens Closed Cup Tester
ASTM D1310 Standard Test Method for Flash Point and Fire Point of Liquids by Tag Open-Cup Apparatus
ASTM D4206 Standard Test Method for Sustained Burning of Liquid Mixtures Using the Small Scale Open-Cup Apparatus

The tendency of dust layers to spontaneous ignition can be characterized by evaluating the dust layer ignition temperature, TL; or its tendency to undergo self-heating or spontaneous combustion. Important combustion hazard properties of flammable liquids, combustible liquids and their flammable vapors include autoignition temperature, AIT; closed-cup flashpoint, lower flammable limit and upper flammable limit. The sustained burning test is important in relation to determining whether certain fluids are Class 3 combustible liquids for transportation purposes as defined by 49 CFR 173.120.

To mitigate the threat of industrial explosions do to the ignition of dust within a process, IEP Technologies provides Explosion Venting, Explosion Suppression and Explosion Isolation systems


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