Fire extinguisher had been developed by DuPont and the US Army in 1954. Both 1211 and 1301 work by inhibiting the chain reaction of the fire, and in the case of Halon 1211, cooling class A fuels as well. Halon is still in use today but is falling out of favor for many uses due to its environmental impact. Europe and Australia have severely restricted its use, since the Montreal Protocol of 1987. Less severe restrictions have been implemented in the United States, the Middle East, and Asia. Internationally there are several accepted classification methods for hand-held fire extinguisher. Each classification is
Hamlet chicken processing plant fire . When the line with a customized connector was brought up to normal operating pressure, it separated from the connector at between . Hydraulic fluid spattered onto the heating lines for the cooker and immediately vaporized. This vapor then went directly into the flame of the gas-fired cooker. The vapor had a relatively low flash point and erupted into a fireball. The ruptured hydraulic line then pumped of hydraulic fluid into the fire before electrical failure shut it down. A state-of-the-art automatic carbon dioxide fire extinguisher designed to cope with such fires had been installed over the vat after a