Can I use a standard water or foam fire extinguisher in these factories?

Absolutely not. Water and foam react with burning aluminium or magnesium to create hydrogen gas, leading to severe explosions.

What type of fire extinguisher is appropriate for aluminium/magnesium powder fires?

Only specialized Class D dry powder extinguishers, dry sand, or dry steatite should be used.

What are the electrical requirements inside the powder plant?

All electrical fittings and equipment must be completely dust-tight (dust-ignition-proof) to prevent the ignition of combustible metallic dust clouds.

Is explosion venting mandatory for these buildings?

Yes, buildings must be constructed with lightweight explosion relief panels or vents to safely release the immense pressure generated during a dust explosion.

IS 4226

: 1988

Code of practice for fire safety of industrial building: Aluminium/Magnesium powder factories

CurrentSpecializedCode of PracticeFire Safety · Fire Safety

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This code of practice provides essential fire safety, layout, and construction requirements for industrial buildings that manufacture or handle aluminium and magnesium powders. It strongly emphasizes the prevention of dust explosions through venting, dust-tight electrical fittings, and strictly prohibits the use of water and certain other conventional fire extinguishing media that react violently with burning metal powders.

Code of practice for fire safety of industrial building: Aluminium/Magnesium powder factories

Quick Reference Values

Approved extinguishing mediaClass D dry powder, dry sand, or dry steatite

Prohibited extinguishing mediaWater, foam, CO2, and vaporizing liquids

Electrical equipment protectionDust-ignition-proof enclosures

Explosion vent discharge locationSafely outdoors, away from walkways and adjacent structures

Practical Notes

Never use water, foam, or CO2 extinguishers on aluminium or magnesium fires, as they react violently to produce explosive hydrogen gas.

Ensure explosion venting panels are unobstructed and direct blast pressures to safe, unoccupied external areas.

Implement strict daily housekeeping protocols to prevent the accumulation of metallic dust, which is the primary cause of secondary, highly destructive explosions.