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BULK SOLIDS HANDLING PROCESS SAFETY

Guide for safe handling of Powders and Bulk Solids

ATEX / DSEAR / DHA
Dust explosion risk
Occupational safety

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Section summary
Content of the handbook


Bulk Solids safety Engineering Guide

ATEX / DSEAR / DHA / Dust explosion risks

The pages in this handbook are a guide to combustible dust hazard analysis as they help understand the concepts used in ATEX / DSEAR / DHA analysis.

Why does dust explode ? Can flour cause dust explosions ? How to test powder ? How to use dust explosion data ? How to carry out a Dust Hazard Analysis ? ...Find all your answers in this guide.

Dust explosion physical properties

Key materials physical characteristics to gather for assessing dust explosion risk and designing a safe process

MIE - Minimum Ignition Energy of dust clouds

Physical meaning and risk in powder explosion risk assessment of MIE, data table of MIE of common powders

MIT - Minimum Ignition Temperature of dust clouds

Physical meaning and risk in powder explosion risk assessment of MIT, data table of MIT of common powders

SIT - Self Ignition Temperature of dust layers

Physical meaning and risk in powder explosion risk assessment of SIT, data table of SIT of common powders

MEC - Dust Minimum explosive concentration - dust explosive concentration range

Physical meaning and risk in powder explosion risk assessment of MEC, data table of MEC of common powders

Powder resistivity

Physical meaning and risk in powder explosion risk assessment of dust resistivity, data table of resistivity of common powders

Characteristics of dust explosion (Pmax, Kst)

Description and key parameters of an explosion of powder cloud

Factors influencing dust explosions

Influence of physical aspects like particle size distribution, humidity, mixture with flammable gas on powder explosions

ATEX dust explosion : zones classification

Criteria to define ATEX zoning within a dust explosion risk analysis

DHA & NFPA 652

Explaining the Dust Hazard Analysis process within the framework of NFPA 652

Ignition sources of dust cloud

List of possible ignition sources of powders to be assessed in risk analysis

Bulk powder electrostatics hazards

Electrostatic risks to be considered in DSEAR, ATEX analysis : sparks, brush discharge, corona discharge, propagating brush discharge, cone discharge, lightning

Dust explosion risks due to mechanical sparks and hot spots

Mechanical risks to be considered in DSEAR, ATEX analysis : metal metal contacts leading to sparks or hot spots, equipment involved, how to avoid the risks or mitigate it

Dust explosion risks due to fire works : welding and cutting

Risks related with welding and cutting works to be considered in ATEX dust risk analysis, DSEAR

Electrical Equipment in ATEX dust explosion zones

Risks associated with electrical equipment in ATEX areas

Good housekeeping : avoid secondary explosions

Making sure the process area remains dust free to avoid secondary explosions

Dust explosion prevention and mitigation

Solutions to prevent and mitigate dust explosions in ATEX environment

Dust explosion venting

Explosion vents : solutions available to release the pressure inside a process equipment in case of dust explosion

Dust explosion vent : sizing

How to calculate the required size of a dust explosion vent ?

Dust explosion isolation

Solutions available to isolate process equipment from a dust explosion

ATEX dust explosion risk assessment

Methodology to perform a dust explosion risk assessment of a bulk solids handling process

Milling systems ATEX safety

Good practices to ensure the safety of milling systems against dust explosion

Pneumatic conveying ATEX safety

Good practices to ensure the safety of pneumatic transport systems against dust explosion


Occupational Safety

Big Bag Handling Safety

Good Practices to ensure a good handling of Big Bags

Rotary Equipment Safety

Good practices to ensure a safe bulk solids handling regarding access to parts in movement