55:), knocks down the fire rapidly, while the foam secures the hazard by laying a vapor-suppressing blanket on the fuel and helping to cool the fuel in skin fires. In pressurized gas fires the foam is applied to extinguish the fuel fires around the blowout and cool heated metal. The Purple-K stream is then discharged into the blowout to "snuff" it out.
69:
Dry chemical tank capacities range from 450 to 3,000 pounds (200 to 1,360 kg). AFFF solution capacity ranges from 50 to 250 US gallons (190 to 950 L). Dry chemical flow rates vary from 5 to 8 pounds (2.3 to 3.6 kg) per second and 35 to 60 US gallons (130 to 230 L) per minute for
62:
or installed as permanent stations. Application is from twin hose lines connected together at the nozzle, one flows the dry chemical agent and the other foam. Twin agent systems are also used in fixed nozzles of vehicles (i.e. AR-FF vehicles) or ground mounted monitors in high hazard locations in
166:
41:
156:
37:
161:
64:
8:
143:
James H. Meidl: "Flammable
Hazardous Materials", Glencoe Press Fire Science Series, 1970.
90:
115:
33:
52:
150:
59:
48:
44:
operations and in industrial areas with high class B hazards.
40:) fire extinguishing agents. It is most commonly used for
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facilities storing or producing flammable liquids. See
32:), incorporates the benefits of dry chemical and foam (
85:
83:
148:
80:
108:
58:These systems can be mounted on vehicles,
149:
120:Safelincs Fire & Safety Solutions
91:"Twin-Agent Skid Fire Fighting Units"
18:twin-agent fire extinguishing system
70:the foam for handline application.
13:
24:), also commonly referred to as a
14:
178:
167:Aircraft rescue and firefighting
1:
73:
7:
10:
183:
137:
51:(and in some applications
47:The dry chemical, usually
116:"Foam Fire Extinguishers"
157:Firefighting equipment
65:Airport crash tender
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162:Fire suppression
131:
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128:
126:
112:
106:
105:
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101:
87:
53:ABC Dry Chemical
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99:
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26:twin-agent unit
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11:
5:
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27:
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123:. Retrieved
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98:. Retrieved
94:
68:
57:
46:
29:
25:
21:
17:
15:
95:Burner Fire
60:skid mounts
151:Categories
74:References
125:July 13,
100:July 13,
49:Purple-K
138:Sources
42:AR-FF
22:TAFES
127:2019
102:2019
38:CAFS
34:AFFF
36:or
30:TAU
153::
118:.
93:.
82:^
16:A
129:.
104:.
28:(
20:(
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