Metal Granule Shop: NFPA 484, Ti Mg Zr Dust Fire and 100 kg NET Limit

Titanium, magnesium and zirconium powders feed aerospace and defense production at TUSAS, Roketsan and TEI (3D printing, CNC milling). Ti dust ignites at 250 C and explodes with water. NFPA 484 combustible metals mandates a 100 kg NET storage limit, Class D extinguishing agent and dust-explosion protection.

Metal Dust Risk

• Ti: MIE 10 mJ, ignition 250 C
• Mg: MIE 20 mJ, ignition 473 C
• Zr: MIE 5 mJ very sensitive
• Al: MIE 50 mJ Kst 415
• Kst: Class St3 >300 bar m/s

NFPA 484 Limits

• Storage limit: 100 kg NET per room
• Bench limit: 5 kg open
• Separation: 2 h firewall
• Static: Grounding, bonded
• Dust collector: Wet type

Class D Extinguishing

• Met-L-X: NaCl-based
• G-Plus: Graphite
• Lith-X: For lithium
• Sand: Dry pipe
• Water forbidden: H2 explosion

Wet Dust Collector

• Type: Water-wash scrubber
• Reason: Dry filter explodes
• Emergency: Spark -> isolation damper
• Separation: 7.5 m outside
• Sludge: H2 evolution monitor

Turkey Sector

• TUSAS: Component production
• TEI: Engine parts
• Roketsan: Mg alloy
• 2017 TUI Imperial: Ti fire FR
• 3D metal printing: EOS SLM

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