Titanium, magnesium and zirconium powders feed aerospace and defense production at Turkish airframe, engine and missile manufacturers (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 bar·m/s
- 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 only; dry filters are unsuitable
Class D Extinguishing
- Met-L-X: NaCl-based
- G-Plus: Graphite
- Lith-X: For lithium
- Dry sand: Kept in buckets at hand
- Water forbidden: H2 explosion
Wet Dust Collector
- Type: Water-wash scrubber
- Reason: Dry filter explodes
- Emergency: Spark -> isolation damper
- Location: Outside the building, at least 7.5 m away
- Sludge: H2 evolution monitor
Turkey Sector
- Airframe manufacturing: Component production
- Aero-engine manufacturing: Engine parts
- Missile manufacturing: Mg alloy
- 3D metal printing: SLM powder bed
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