500 (Pmax), 6 0.70 75 174 15,690 294 1,000 3 (dP/dtmax) 5 1.00 70 4 1,000 (Pmax), 4 0.78 75 167 15,480 291 3.5 750 (dP/dtmax) Spherical Powders Ignition 1,250 (Pmax), @1 8.0% 63 0.15 120 101 1,220 23 1,000 N.I. 1,750 (dP/dtmax) @ 7.5% 36 0.25 60 124 4,770 90 1,250 13 30 0.10 60 140 5,940 111 1,000 13 15 0.50 45 148 10,812 203 1,000 7 15 0.30 55 8 6 0.53 75 174 16,324 306 750 6 Ignition @ 6.0% 5 1.30 167 14,310 269 750 750 @ 5.5% Ignition @ 6.0% 5 1.00 70 155 14,730 276 1,250 6 1,250 @ 5.5% 3 2.50 95 165 15,900 298 1,250 4 2 3.00 130 For U.S. conversions: 1 m2/g = 4884 ft2/lb; 1 g/m2 = 0.000062 lb/ft2; 1 bar/sec = 14.5 psi/sec; 1 bar·m/sec = 0.226 psi·ft/sec. BET: surface area per unit mass; MEC: minimum explosible concentration; MIE: minimum ignition energy; LOC: limiting oxygen (O2) concentration. Notes:
6 0.70 75 174 15,690 294 500 (Pmax), 1,000 (dP/dtmax) 3 5 1.00 70 4 4 0.78 75 167 15,480 291 1,000 (Pmax), 750 (dP/dtmax) 3.5 Spherical Powders 63 0.15 120 101 1,220 23 1,250 (Pmax), 1,000 (dP/dtmax) N.I. Ignition @1 8.0% @ 7.5% 1,750 36 0.25 60 124 4,770 90 1,250 13 30 0.10 60 140 5,940 111 1,000 13 15 0.50 45 148 10,812 203 1,000 7 15 0.30 55 8 6 0.53 75 174 16,324 306 750 6 5 1.30 167 14,310 269 750 Ignition @ 6.0% @ 5.5% 750 5 1.00 70 155 14,730 276 1,250 6 Ignition @ 6.0% @ 5.5% 1,250 3 2.50 95 165 15,900 298 1,250 4 2 3.00 130 For U.S. conversions: 1 m2/g = 4884 ft2/lb; 1 g/m2 = 0.000062 lb/ft2; 1 bar/sec = 14.5 psi/sec; 1 bar·m/sec = 0.226 psi·ft/sec. BET: surface area per unit mass; MEC: minimum explosible concentration; MIE: minimum ignition energy; LOC: limiting oxygen (O2) concentration. Notes:
NFPA%20652_Second%20Draftv4_May14.docx