Computer and electronic equipment room gas fire extinguishing agent of choice
Can see from Table 1, the traditional water, foam, dry powder and smoke systems are not applicable to electronic equipment room fire-fighting. It should be a rapid evaporation at room temperature, evaporation does not leave residue, and non-conductive, non-corrosive gas extinguishing agent. Gas fire extinguishing system is to have a fire-fighting capacity of some gaseous compounds (room temperature) storage at room temperature high-pressure or low temperature low pressure containers, when the fire broke through the automatic or manual control device cast into the fire area to achieve the fire-fighting purposes. It has a clean, no stains and fire quickly, it is widely used in archives, electronic equipment room and the Treasury and other valuables. More types of gas fire, but only to the widely used carbon dioxide, Halon (1211,1301) and from abroad in recent years, the FM200 and INERGEN so, these types of gases, performance parameters are listed in Table 2.
1, Halon (1211,1301) Fire extinguishing agents appeared in the early 20th century, the beginning for aircraft and ships. The early 70s, the United States Fire Protection Association (NFPA) has developed and adopted 1301 and 1211 fire extinguishing system fire extinguishing system of formal standards, so that 1211 and 1301 prompted the rapid promotion in the world. China's introduction of alkyl halides and study started in 1964, but the system of applied research and development of related standards in 80 years began,
Fire extinguishing agents are halogen atoms replace some low-level hydrocarbon, some or all of hydrogen atoms generated by the ability of certain compounds of the general fire-fighting, also known as Halon (halon) fire extinguishing agent. It is a clean fire extinguishing agent has been vigorously promoted, widely used in various power electronics equipment room, 70 years found that as ozone depleting halon one of the culprits. 1991, adopted the "Montreal Protocol (an amendment)," all developed countries have a full cessation of the use Halon, China also will be in 2005 and 2010, respectively 1211 and 1301 fire extinguishing agent on the complete ban.
Atoms generated by the ability of certain compounds of general fire-fighting, also known as Halon (halon) fire extinguishing agent. It is a clean fire extinguishing agent has been vigorously promoted, widely used in various power electronics equipment room, 70's found for the ozone depleting Halon one of the culprits. 1991, adopted the "Montreal Protocol (an amendment)," all developed countries have a full cessation of the use Halon, China also will be in 2005 and 2010, respectively 1211 and 1301 fire extinguishing agent on the complete ban.
2, carbon dioxide Carbon dioxide (CO2) is a component of Earth's atmosphere, as fire extinguishing agents began in the 19th century, more than 100 years history in China there are "carbon dioxide fire extinguishing systems", it is a normal temperature and pressure colorless, odorless, non-conductive, chemically neutral, non-corrosive gas, in our design of the building fire safety provisions can be used in the file room, a large number of power electronic equipment rooms and other parts. The extinguishing mechanism is the dilution of oxygen, a stifling effect on, there are some cooling effect. But in recent years some of their used electronic equipment room has been questioned, mainly because of its lethal concentration of the human body is 20%, while the minimum extinguishing concentration was 34% (e-room design concentration 40%). Despite delay 10s ~ 60s (no more than 30s) to evacuate personnel and other measures in the protection zone, there are still accidents may, domestic also examples of death and disability. In addition, when the jet was a strong effect of freezing, frost-room items, air cooling fog appears, in fact CO2 mist. This process is very short, no serious problem with electronic equipment, but is influential on the magnetic recording device. Another controversy is that CO2 is a three-atom molecular structure, causing the Earth "greenhouse effect", it Daoshi do not worry, because the fire with the CO2 derived from industrial by-products. Accordingly, CO2 equipment in the room was often the promotion of merit careful, but because of its excellent fire performance and very low pharmaceutical prices, is worth in other essential areas vigorously promoted.
3, FM200 FM200, also known as seven fluorine propane or HFC-227ea, for the U.S. Great Lakes products. Gaseous at room temperature, colorless, odorless, non-conductive, non corrosive, no environmental restrictions, air retention period shorter. Halon fire extinguishing mechanism and its the same as the interruption of combustion chain, fast fire, which protect the rescue of precision electronic equipment and valuables are beneficial. FM200 design of electronic equipment room concentration of 8%, 9% lower than the NOVEL concentration, on human security. Spray mist and some frozen when the role, but does not seriously affect the visibility and personnel evacuation. People often talk of Pharmacy at the scene decomposition under high temperature toxicity, in fact, like Halon, although some toxic decomposition, but decomposition products than the indoor burning of toxic materials is much smaller. Pharmacy storage pressure is generally 2.5MPa or 4.2MPa, jet delay is generally 10s ~ 30s, in order to evacuate Protection District personnel. In addition to slightly elevated concentrations of FM200 design, its performance characteristics are similar to Halon 1301, in some places more than 1301 security. The biggest drawback is the high pharmaceutical prices for the 1301 Pharmacy of 2.5 times. Currently there are several equipment manufacturers, China's "seven fluorine propane (HFC-227ea) Clean gas fire extinguishing systems" (issued) have been introduced, which marks the FM200 transitional as Halon alternatives will be widely used in China .
4, INERGEN
INERGEN (Inergen), also known as IG-541, for the U.S. security elements (ANSUL) product, which is nitrogen, argon and carbon dioxide to the volume ratio of 52:40:8 mixture of a fire extinguishing agent . Its three constituent elements are not active gas, the basic ingredient for the atmosphere. Colorless, odorless, non-conductive, non corrosive, no environmental restrictions, no fire during the decomposition. The extinguishing mechanism for the dilution of oxygen, choking fire. One major effect of carbon dioxide to stimulate the human respiration, the body can be less than 12% of the oxygen concentration was still breathing depth and frequency by accelerating the availability of adequate oxygen, the oxygen concentration in the combustion will not continue. Spout when the ambient temperature change is small, and does not affect visibility, as long as the design of better control of concentration, it should be said to be a more perfect fire extinguishing agent, but before or at the injection should be enough delay to allow evacuation. The drawback is the noise a large spout, storage bottle groups are stored under pressure at room temperature (21 ) was 15MPa, the minimum injection pressure when the nozzle 2.24Mpa. Increased risk of hypertension, but also relatively easy to leak, pipe fittings materials and installation, maintenance, and higher level requirements. No INERGEN relevant norms in China, China has begun to equipment manufacturers, design, construction may
I am China Quality Dress writer, reports some information about carbon squash racket , liquid metal tennis racket.
Processing your request, Please wait....
