【 Weak current College 】 gas extinguishing system selection configuration techniques---Power By 【 China power house network 】

National Atlas 07 S 207 the gas fire extinguishing system selection, installation and construction of fire extinguishers Configuration Editor: Napa Group editorial: Tang luoding Yuan Zhu Hua summary in recent years, with the rapid development of China's national, industry and civil construction projects require the use of fire-extinguishing systems in place for more and more. National Atlas of the gas fire extinguishing system selection, installation and construction of fire extinguishers configuration through access to Napa Group, a large number of domestic and foreign well-known gas fire investigation system manufacturers and fire engineering company, visited parts of the country representative for gas fire control systems engineering of the instance, which completed the preparation of this Atlas. This article focuses on the figure of gas fire extinguishing systems components involved in the design selection, system settings, pipe laying and installations and more relevant content to a comprehensive overview. Keywords-extinguishing systems category selection system setup pipe installation in recent years, with the rapid development of China's national, industry and civil construction projects require the use of fire-extinguishing systems in place for more and more. Since the gas fire extinguishing agent types, differences between each other, larger, several performance better clean gas fire extinguishing agent in the practical application of China short, comprehensive system to master the knowledge of staff remains low, in line with national standards in the gas fire-extinguishing system design specifications and the gas fire extinguishing system construction and acceptance of the implementation of the Ministry of construction in 2006, formally approved the project preparation of the National Atlas of the gas fire extinguishing system selection, installation and construction of fire extinguishers configuration ". Preparing the group after a year of hard work, successful completion of this task. Ministry of construction on 5 April 2004 to jianzhi letter (2007) No. 129 approval, issued the gas fire extinguishing system selection, installation and construction of fire extinguishers configuration on the National Atlas, Atlas, as 07S207, since 1 June 2007. This article focuses on the figure of the gas fire extinguishing system selection configuration design full of relevant content. 1 gas fire extinguishing system for the classification of species classified as extinguishing agent 1.1,: 1.1.1 halogenated hydrocarbons (chemical fire extinguishing agent) gas fire extinguishing systems, e.g. heptafluoropropane fire extinguishing systems (HFC-227ea) Chlorotrifluoromethane fire extinguishing systems (HFC-23) dichlorohexafluoropropane fire extinguishing systems (HFC-236fa) 1.1.2 halon class (chemical fire extinguishing agent) gas fire extinguishing systems, such as Halon 1211 fire-extinguishing system (China has ceased production in 2005 1211 fire-extinguishing agent) halon 1301 fire extinguishing system (our commitment to the 2010 stopped producing 1301 fire extinguishing agent) 1.1.3 natural gas class fire extinguishing system, such as IG-541 (N2, Ar, CO2 gas mixtures) extinguishing system IG-100 (N2) extinguishing system IG-55 (N2, Ar gas mixtures) extinguishing system IG-01 (Ar) fire extinguishing system for carbon dioxide (CO2) fire extinguishing systems (traditional fire extinguishing technology) 1.2 extinguishing conveying pressure sources and forms of classification are: 1.2.1 in storage pressure gas fire extinguishing systems, fire extinguishing agent in cylinder group with driven gas (usually N2) pressurized storage, system action agent relies on the bottle of pressurized gases conveying system. As common heptafluoropropane fire extinguishing system, dichlorohexafluoropropane fire extinguishing system, Halon 1211 fire-extinguishing system, halon 1301 fire extinguishing system. 1.2.2 external storage pressure gas extinguishing system system action fire extinguishing agent from dedicated pressurized gases (typically N2) cylinder group press design pressure to be pressurized systems. As Shanghai jindun fire safety equipment co., Ltd., development and production of external storage-heptafluoropropane fire extinguishing system (the original was called by-heptafluoropropane extinguishing systems). 1.2.3 self-extinguishing gas extinguishing system without filling pressure and is relying on its own with saturated steam pressure conveying the fire extinguishing system. If Chlorotrifluoromethane fire suppression systems, fire extinguishing system, IG-541 IG-100 fire extinguishing systems and fire-extinguishing system, IG-55 IG-01 fire extinguishing system, carbon dioxide fire suppression systems. 1.3 extinguishing agent storage pressure classification 1.3.1 high-pressure system agent storage pressure 20MPa 15MPa, gas fire extinguishing system. If IG-541, IG-100, IG-55, IG-01 fire extinguishing system, etc. 1.3.2 the extinguishing medium-voltage systems in storage pressure 2.1MPa (low pressure CO2), 2.5MPa, 4.2MPa, 5.6MPa, 5.7MPa (high pressure CO2) gas fire extinguishing system. If three heptafluoropropane, methane, propane, 1211 hexafluoride, 1301, carbon dioxide fire suppression systems. Because high pressure CO2 extinguishing system is the extinguishing agent in pressurized liquefied storage at room temperature (20 ℃ storage pressure 5.7MPa) of carbon dioxide fire extinguishing system, low pressure CO2 extinguishing system is the extinguishing agent at-18 ° c to-20 ° c liquid storage at low temperature (-18 ° c storage pressure 2.1MPa) of carbon dioxide fire extinguishing system, so they both belong to the low pressure gas fire extinguishing system. Protection classification 1.4 1.4.1 fully submerged in the fire extinguishing system fire extinguishing agent in the stipulation shotcrete on time so that the protective zone of a confined space reaches design fire extinguishing concentration. In addition to all other than CO2 gas fire extinguishing agent shall only apply to this system. 1.4.2 local application fire fighting systems to the design of the injection rate to specific protection object spews fire extinguishing agent, and sustained over time. CO2 is the only one that can be used for all drown the fire extinguishing system can also be used for local application fire fighting systems of gas fire extinguishing agent. There is no fire extinguishing agent 1.5 transportation network category 1.5.1 with pipe fire suppression system agent from storage installations required via network (dry pipe and tube) to the spray-and-drop components (nozzle) to implement the spraying extinguishing system. One set of extinguishing agent storage installations only protect a protection zone or the protection of fire-extinguishing system for the object element is independent of the system; and a set of extinguishing agent stockpile system protects two and more (8) the protection zone or the protection of fire-extinguishing system for objects combined distribution system. 1.5.2 (no network) prefabricated fire extinguishing system. According to certain conditions of application of extinguishing agent storage installations and spray-and-drop components such as pre-designed, Assembly complete with linkage control function of fire extinguishing system. Such as fluorine c-Prefabricated high-pressure carbon dioxide fire suppression systems, fire extinguishing system, prefabricated Chlorotrifluoromethane prefabricated fire extinguishing system, dichlorohexafluoropropane prefabricated fire extinguishing system. 2 in recent years, countries in all relevant gas fire extinguishing systems and regulations for the protection of the atmospheric ozone layer and the human environment for generations to come, my Government in 1984 and 1991 respectively, have signed the Convention on the protection of the ozone layer of the Vienna Convention and the destruction of Montreal Protocol, the China of ODS phase-out of national programme and the Chinese fire industry halon phase-out plan as a whole, the commitments in 2005 to stop production of Halon 1211 fire-extinguishing agent, 2010 to stop production of halon 1301 fire extinguishing agent. In 1994, the Ministry of public security and the State jointly issued the "about" non-essential places to stop and then configure the halon fire extinguishers "circular (gongtong [1994] No. 94). In 1996 the Ministry of public security issued a "publishing" alternatives to promote application of the provisions of notification law "(public-169, [1996]). In 1999 the Ministry of public security issued on phase-out of halons fixed fire extinguishing systems and halon fire extinguishers for code (Duke Energy [1999] No. 031). In 2000, the Ministry issued the urge implementation of fire extinguishers configuration units and periodically check the maintenance functions to ensure the effective beginning of fire fighting "circular (male elimination [2000] No. 423). In 2001, the Ministry of public security issued a "on further strengthening the halon substitutes and alternative techniques for the management of the law (public-217, [2001]). In 2002, the Ministry of public security issued a national public security industry standards in the gas fire extinguishing system and component performance requirements and test methods "(GA400-2002). 2005 national standards of the construction of fire extinguishers configuration design code (GB50140-2005). 2006 national standards promulgated by the gas fire-extinguishing system design code (GB50370-2005). 2007 national standards promulgated by the gas fire extinguishing system construction and acceptance (GB50263-2007). Comprehensive revision of the 1995 and 1997, 1999, 2001, 2005, the partial revision of the fourth national standards of the tall buildings design fire protection standard (GB50045-95) (2005 Edition). In 2006, a comprehensive revision of the architectural design fire protection standard (GB50016-2006). In 1997, a comprehensive revision of the garage, garage, parking design fire protection standard (GB50067-97). In addition to the above policies should be set in place of gas fire extinguishing systems was carried out, nor on Halon 1211, 1301 fire extinguishing agent, fire extinguishers, fire extinguishing system for use as expressly limits. 3 our progressive restrictions and eliminated halon gas fire extinguishing agent, development and application of new clean gas fire extinguishing agent guidelines and basic principles of halon alternative work must 3.1 insisted on the necessary premises and non-essential workplace discrimination, traditional fire extinguishing technology and halon alternative techniques simultaneously. Cause: ① has only until the world has not yet been developed to meet or even exceed the halon gas fire extinguishing efficiency, can completely replace the new gas extinguishant 1301; ② phase-out of halons in ensuring our work smoothly, not because of the phase-out of halons and reduced ability to fire protection. 3.2 prohibits the use of hydrogen CFC (HCFC), hydrogen-containing Hydrobromofluorocarbons (HBFC), containing hydrochlorofluorocarbons (PFC) of gas and pentafluoroethane (HFC-125) as alternatives. 3.3 can use hydrogen fluoride gas hydrocarbons (such as Chlorotrifluoromethane HFC-23, heptafluoropropane HFC-227ea, dichlorohexafluoropropane HFC-236fa) and natural gas class clean gas (such as IG-01, IG-55, IG-100, IG-541) as alternatives. 3.4 ban on non-essential workplace design, installation and use of halon fire-extinguishing systems, non-essential facilities may use traditional fire suppression technology (such as CO2, water spray, foam, etc.), or you can use halon alternative extinguishing technology. 3.5 necessary places can either use the halon fire suppression system, you can also use halon alternative extinguishing technology. 3.6 ban on non-essential Halon 1211 places configuration fire extinguishers, non-essential facilities should be matching CO2, dry powder, foam, water system, fire extinguisher. 3.7 necessary places can still configure the Halon 1211 fire extinguishers. 3.8 halon substitutes should be through national fire products quality supervision and inspection center of type inspection. Without the survey or inspection of domestic and foreign products cannot be sold and used in the country. 4 clean gas fire extinguishing agent (halon replacement) of the basic requirements: not to destroy the atmosphere of the ozone layer. Without the greenhouse effect, or to the greenhouse effect is small. In the atmosphere of a shorter survival time. The human body without toxic effects, or little impact; can be used in place of regular people. Not combustible. Fire extinguishing efficiency high, the design of fire extinguishing concentration is low. Jet can all vaporization, in the direction of closed space quickly and evenly distributed. No solid or liquid residues, non-conductive, no breakdown of electrical and electronic equipment, not deface, corrosion and damage to the protected premises equipment, equipment, heritage. 5 current allows the use of gas fire extinguishing agent description trifluoromethane 5.1, heptafluoropropane, dichlorohexafluoropropane, argon (IG-01), nitrogen (IG-100) and argon + nitrogen gas mixtures (IG-55) and argon + N2 + carbon dioxide gas mixtures (IG-541) and carbon dioxide (CO2), etc. 5.2 which technology is more mature and comprehensive performance indicators more reasonable, well known for everyone, but also has practical application value: IG-541, heptafluoropropane, three fluorine methane, propane, IG-100 hexafluoride, CO2, etc. IG-541 is a colorless, tasteless, non-toxic gas fire extinguishing agent, does not destroy ozone on the environment without any adverse effects. Non-conductive, fire-fighting process clean, without leaving any traces. Suitable for extinguishing A, B, C class fire fire and electrical equipment. Can be used to protect it was often inadequate. The fire-fighting mechanism is by lowering the combustion of the surroundingOxygen concentration and the smothering effect for physics. Heptafluoropropane not conductive, does not destroy the ozone layer, the atmosphere at room temperature can be pressurized liquefied, at room temperature conditions can all volatile. No residue after fire. Can be used to fight A, B, C class fire fire and electrical equipment. Can be used to protect it was often inadequate. Heptafluoropropane as chemical fire extinguishing agent, the fire extinguishing mechanism as the main part of the physical and chemical methods of fire. Chlorotrifluoromethane colorless, tasteless, low toxicity and non conductive, on atmospheric ozone depletion potential (ODP) is zero. Fire extinguishing speed, fire extinguishing efficiency high, no residues after injection, the device is not defaced, good electrical insulating properties. Can be used to fight A, B, C class fires and electrical equipment, fire protection, also applies to regular people. Chlorotrifluoromethane as chemical fire extinguishing agent, the fire extinguishing mechanism as the main part of the physical and chemical methods of fire. And heptafluoropropane compared with in cold, the heat environment can use the features and price advantage. Dichlorohexafluoropropane of physico-chemical properties and fire extinguishing characteristics and heptafluoropropane, Chlorotrifluoromethane similar, not destroy ozone on the environment without any adverse effects, not electrically conductive, fire-fighting process clean, without leaving any traces. Due to its boiling point is much higher than that of saturated vapor pressure is low, compared to a fire extinguisher. Nitrogen (IG-100) colorless, tasteless, non-toxic, low electrical conductivity, is a major component of the Earth's atmosphere, a sense of the clean gas. The fire-fighting mechanism for physics. Can be used to fight A, B, C class fire fire and electrical equipment. It was often applied to protection. Nitrogen can be separated from the air, sources from a wide range of filling an affordable price. Carbon dioxide fire extinguishing system is the mature traditional fire extinguishing technology, it does not fall within the strict meaning of the halon substitutes. Because it would have on the Earth's greenhouse effect that spews when people are suffocating toxic effects, so in principle cannot be regarded as a full sense of the clean gas fire extinguishing agent. Carbon dioxide for the vast majority of substances not destructive, non-conductive, fire fighting, fire quickly and thoroughly after quickly dissipated, without leaving any traces, not defaced items, lower-cost, non-toxic substances. The fire-fighting mechanism for physical asphyxia and some cooling effect. Suitable for extinguishing A, B, C class, electrical equipment fires and cotton, fabric, paper, and other parts of solid materials, as well as deep-fire paraffin, bitumen etc can be melted solid fire. Can be used for all drown the fire extinguishing system, and only available for local application fire fighting systems of gas fire extinguishing agent. And several other than natural gas fire extinguishing agent, it's the best fire extinguishing efficiency. The disadvantage is the high concentration of fire design, extinguishant more storage bottles or tank-need larger, on the Earth's environment will produce the greenhouse effect, when on spews a suffocating toxic effects, not suitable for regular people to work or stay in place. In the release process because of solid CO2 (dry ice) exist, will bring protection zone temperature plummeted, it may be on precision instrument and precision equipment. Gas fire extinguishing agent in China policy allows usage table extinguishing agent name of chemical (or merchandise) name of chemical composition category policy allows usage heptafluoropropane HFC-227eaCF3CHFCF3 halogenated hydrocarbons HFC √ N2, Ar, CO2 gas mixture IG-541N2 (52%) Ar (40%) CO2 (8%), natural gas √ nitrogen IG-100N2 (100%) of natural gas √ N2, Ar mixture IG-55N2 (50%) Ar (50%) of natural gas √ argon IG-01Ar (100%) of natural gas √ carbon dioxide CO2CO2 (100%) of natural gas √ Chlorotrifluoromethane HFC-23CHF3 halogenated hydrocarbons HFC √ dichlorohexafluoropropane HFC-236faCF3CH2CF3 halogenated hydrocarbons HFC √ chloropentafluoroethane HFC-125CF3CHF2 halogenated hydrocarbons HFC× PTFE dichloroethane HCFC-124CHClFCF3HCFC× 10 FC-3 fluoride butane-1-10C4F10PFC× eight perfluoropropane FC-2-1-8C3F8PFC× halogenated hydrocarbon mixture HCFC blend ACHClF2 (82%) CHClFCF3 (9.5%) CHCl2CF3 (4.75%) C10H16 (3.75%) HCFC× 1211 (fire) the restriction of the use of halon CF2ClBr 1301CBrF3 halon restrictions on the use of the 6 included in the book Atlas extinguishing system types after extensive consultation and comprehensive comparison, into the book Atlas of seven perfluoropropane, IG-541, carbon dioxide, methane and IG-100 fire extinguishing system. The following table: systems working pressure (MPa) full submersion system local application systems fire extinguishing agent storage pressure (20 ° c) maximum working pressure (50 ° c) the distribution system Cabinet has no pipe prefabrication system cabinet supply precast system unit independent system portfolio allocation system unit independent system portfolio allocation system unit independent system portfolio allocation system 1 heptafluoropropane fire extinguishing system storage pyramid 2.54.2 √ √ √ 4.26.7 √ √ 5.67.2 √ √ external storage pyramid 0.394.2 √ √ 2IG-541 fire extinguishing system 1517.2 √ √ 2023.23 high pressure CO2 extinguishing system 5.712.1 √ √ √ √ √ tank type low pressure CO2 extinguishing system 2.12.5 √ √ √ √ integral low pressure CO2 extinguishing system 2.12.5 √ √ √ √ cabinet type low pressure CO2 extinguishing system 2.12.5 √ √ √ √ 4 Chlorotrifluoromethane fire extinguishing system 4.213.7 √ √ √ 5IG-100 fire extinguishing system 1517.2 √ √ 2023.2 √ √ 7 gas fire-extinguishing system design selection of basic principles of security applicable, advanced technology, reasonable, consistent with national policies. 8 gas fire extinguishing system is applicable and not applicable fire type should be aware of cotton and wool, fabrics for 8.1, paper, solid substance of deep-fire, you can only use carbon dioxide fire extinguishing system. 8.2 CO2 is only available for local application systems of gas fire extinguishing agent. Local system is a dedicated spray nozzle, causes CO2 can direct, focused Jet to a burning object. Asked nozzle drop in CO2 penetrates smoke, fire and burn the surface up to a certain continuity of supply and the strength,Certain time burning off. Local application fire fighting systems can only be used to fight unwanted closed space conditions of specific protection object surface fire, such as steel mill, printing presses, power plants, drying equipment, immersion tanks, automobile factory paint line workers local protection Ministry working position. You cannot fight fire deep bits. 8.3 gas fire extinguishing systems for fighting electrical fires, solid surface fire, fire extinguishing liquid fire and can cut off the air supply before the gas fire. This is a broad perspective, specifically, should mean unsuitable water protection or fire place or object. Such as electrical and electronic equipment, communications equipment, flammable and combustible liquids and gases, valuables and property store locations. 8.4 into Atlas of various gas extinguishing systems are suitable for extinguishing liquid fire (class b fire), carbon dioxide, methane is also suitable for extinguishing paraffin, bitumen etc may be melting solid fire. But for IG-541 fire extinguishing system, due to its fire-extinguishing efficiency was relatively low, while high pressure spray drop can lead to flammable and combustible liquid splash and vaporization, have resulted in the spread of fire risk, the enlargement of the generally do not advocate for fighting the main fuel for the fire of the liquid. 8.5 for gas fires, no matter where a gas fire extinguishing system, are required before the fire spews can cut off the gas supply. That should concern at design time and reminded gas professional designers in gas pipeline on emergency automatic cutting device. The code makes it clear that: this measure aims to prevent the accumulation of flammable gas explosion, the second is to prevent the combustible combustion gases to escape the dilution effect fire extinguishing concentration. 9 on gas fire extinguishing agent for conveying distance and extinguishing pipe calculation in this Atlas 17 page tables, lists various gas fire extinguishing systems, fire extinguishing agent for conveying distance: heptafluoropropane system 2.5MPa 30m, 4.2MPa 45m, 5.6MPa 60m; IG-541 extinguishing system 150m; high pressure CO2 extinguishing system 120m CO2 extinguishing systems; low voltage; 60m Chlorotrifluoromethane fire extinguishing system 60m; IG-100 150m fire suppression systems. Here agent transmission distance refers to the medium pipeline equivalent length of recommended. Because gas extinguishing pipe design calculation is very complicated, the calculation process is tedious, it is not possible to rely on the traditional manual methods for precise calculation, so we at Atlas general description 13.3 stressed construction drawing design stage, preferably in the gas fire extinguishing system manufacturer or gas fire engineering company with the adoption by its method of calculation or specialized software is medium conveying pipe networks computation. For external storage-heptafluoropropane fire extinguishing system, Shanghai jindun fire safety equipment co., Ltd. in 207m equivalent length of pipe for fire test and successfully. But we consider that this experiment data is in better condition (basic horizontal pipeline, well-prepared, etc.), practical field conditions far worse than fire laboratory, and the more uncertain factors, it is in the table is based on the length of the recommended 150m equivalent, leaving room for more. If specific engineering design, the company developed the accurate calculation of specialized computing software, or greater than the recommended value. 10 about heptafluoropropane, Chlorotrifluoromethane-fighting mechanism for a long time, people heptafluoropropane and trifluoromethane-fighting mechanism are used as "chemical suppression" or "reaction", international organization for Standardization (ISO) in 2000, the publication of international standards in the gas fire extinguishing system – physical performance and system design "is clear: ISO 14520 heptafluoropropane, Chlorotrifluoromethane main part physically and chemically-fighting. We at Atlas 16 page table also adopted this formulation. 11 on gas extinguishing pipe hangers as gas fire extinguishing agent storage pressure higher, IG-541, IG-100 gas fire extinguishing systems even after the decompression is still 4 ~ 7MPa transport pressure, heptafluoropropane, CO2, methane gas fire extinguishing system has more than conveying 1.0MPa pressure from system startup to fire extinguishing agent is spraying on end, extinguishing pipes in fire spews constantly accompanied by shock, vibrations and shaking phenomenon appears. Therefore, in addition to the requirements for fire extinguishing agent pipeline should be thick-walled seamless steel pipe, the comprehensive revision of the gas fire extinguishing system construction and acceptance of GB50263-2007 also placed special emphasis on piping and hangers anti shake function. We design the Atlas page 67 of some common forms of hangers are also supported by baffled (hanging). 12 protection zone envelope withstanding intrinsic pressure allows pressure, pressure relief and automatic drain valve gas extinguishing system startup to protection area sprayed on a large number of fire extinguishing gas, causing the air pressure transient protection area. In addition, the fire burning calories would make indoor air pressure has increased. In the larger when fire spews, longer, air pressure, the greater the value. Therefore, the code requires the protection area of envelope (including doors and Windows) withstanding intrinsic pressure allows pressure (internal and external pressure difference) should not be lower than 1200Pa. Protection area ceiling allowed pressure generally does not meet this requirement, it cannot be considered a protective zone of the envelope, but should be part of the space above the ceiling volume included in the total volume of protective zone. Protection zone of envelope withstanding intrinsic pressure allows pressure, should be determined by the architectural and structural design. Atlas 6 page 7.3 table according to the local standard of Guangdong Province IG-100 gas extinguishing system design, construction and acceptance standard》dbj15-47-2005 lists the high-rise construction, General construction, underground building protection zone envelope withstanding intrinsic pressure allows pressure reference value. Here the protection area of the building envelope, including the protection zone around the wall and upper and lower floors, including the protection zone of doors, Windows and doors, window glass. Heptafluoropropane, IG-541, carbon dioxide, methane, propane IG-100, SF6 etc. all submerged gas fire extinguishing systems are required in airtightness and good protection zone set pressure relief. Its role is on the one hand, when protective zone extinguishing spray on pressure rise to certain values, some by the pressure of the air and fire protection district in time to the release, in order to ensure the protection of the safety zone enclosure; On the other hand, prevent protective zone spews an extinguishing medium pressure rise due to frame failure caused the fire, explosion fire out of control. Because heptafluoropropane, carbon dioxide, methane, and three of the six heptafluoro than air, and to reduce fire losses from the pressure relief vents, the norms set such gas fire extinguishing system for the pressure outlet should be opened in the protection zone clear height of 2/3 of the above sites, i.e. under pressure relief vents along the height required protective zone clear height of 2/3. The norms and requirements, reducing the pressure on the wall at yishe. In other words, such as protection zones exist outside wall, should be located in the exterior wall; when no external protection area, located in the corridor adjacent interior walls. By expanding the science and technology co., Ltd. Beijing beneficial, the fire fight Science Graduate School in Beijing joint research and development of FXY series automatic drain valve and Sichuan Grand Dragon fire equipment co., Ltd. developed by WLZX series automatic drain valve fills up the domestic high-quality finished products for a long time without drain valve. Automatic drain valve is installed and put into use, CY 24h monitoring protection regional air pressure. Fire, gas fire extinguishing system startup spews fire extinguishing agent, protection of air pressure in the region. When the pressure reaches the set value, the relief pressure equipment issued the action signal, implementing agencies quickly leaves from off to on, the quick release protection zone of overpressure air. When the air pressure drops to below the set value, CY again to execute the action signal issued so that the executing agency, reset, leaves off, keep the protective area of extinguishing concentration. Atlas of sections 75, 76 pages indexed in both product dimensions, technical performance and installation diagram. In addition to automatic drain valve product, the Atlas of 77 pages also included a new era in fire protection technology co., Ltd and Hangzhou Siemens building technology (Tianjin) co., Ltd., development and production of mechanical opening pressure relief valves. 13 with regard to storage bottles (tank room) in size, headroom and surface loads require gas extinguishing system storage bottles, storage tanks for low pressure CO2 extinguishing system is a gas fire extinguishing systems for key positions. Gas fire extinguishing systems for core components (storage devices and drives) is set here. In "Atlas," p. 65 heptafluoropropane, IG-541, high pressure CO2, methane gas extinguishing system storage bottles between layout, we follow the norms of the basic requirements summarized the reservoir of bottles between four layout and flat-size requirements, and expressly reserve bottle compartments between the beam is inappropriate when the beam height is less than 2.5m (high out of the fire extinguishing agent maximum storage installations around 300mm), no beam is not lower than sheet base height 2.8m (above the maximum height of about 600mm storage installations). In "Atlas" external storage page 66-70 of propane, IG-100, low pressure CO2 extinguishing systems storage bottles, storage tanks (for device) layout, we integrated a variety of layout of forms and plane dimension requirements, and clear external storage-heptafluoropropane extinguishing system reservoir 90L bottle bottles should not be less than the clearance height between 2.5m, reservoir 180L bottle bottles should not be less than the clearance height between 3.2m; IG-100 extinguishing system storage bottles should not be less than the clearance height between 2.4m; low pressure CO2 extinguishing system storage bottles or device clearance height between devices is in the "Atlas", 44, 47 pages table by different manufacturers, different specifications give clear, respectively. About storage bottles (tank room) of ground bearing capacity requirements, we are only the "Atlas", 44, 47, 48, 66 pages respectively gives low pressure CO2 fire-extinguishing system, storage tanks, pressure-heptafluoropropane extinguishing system storage bottles and IG-100 reservoir between the ground load bottles, the rest of the system are only relevant page lists the extinguishing agent storage installations with a total weight or gross weight calculation method. Structural engineer and storage installations of total weight and force plane shape and size beam and slab structure design, large concentrated load into smaller uniform load bearing systems, Mitch beam height and floor thickness. 14 on the extinguishing agent pipeline through the buildings structure deformation joint typically, extinguishing not crossing pipeline deformation joint building structure. But in engineering practices to completely do not cross is difficult. Therefore, if you must travel through time, take the set stainless steel flexible metal hose or bellows expansion joints and other reliable anti-settlement, resistance to deformation measures to ensure the safe operation of the system. "Atlas," pp. We design gas extinguishant pipeline crossing deformation joint installation diagram. Of these, DN25 ~ 65 of small diameter pipe may use high pressure stainless steel flexible metal hose, DN80 ~ 200 large-diameter pipes should adopt the high-voltage ripple inflation Festival. High pressure stainless steel flexible metal hose and high-voltage ripple inflation Festival by Nanjing Hyde Rambo · pipe manufacture co., Ltd, 8MPa and 10MPa two working pressure level design amount 30mm radial compensation. Installation pictures have no deformation joint Department is equipped with a firewall the firewall and in two different installation methods, and should ensure that the extinguishing medium deformation joint pipe on each side of the centre line on the same line. In the gas fire extinguishing agent transport pipeline crossing when building structural deformation of high stainless steel flexible metal hose or high pressure bellows expansion joints, which can effectively eliminate stress and deformation of the pipe system, compensation pipeline radial displacement, to avoid uneven subsidence caused by pipe deformation or damage. For large-diameter (DN150, DN200) extinguishing pipes or foundation settlement may be slightly larger than 30mm, can also be equipped with a firewall of deformation joint on each side sets a high pressure stainless steel flexible metal hose or high pressure ripple inflation Festival, the effect will be more satisfactory. 15 with regard to gas extinguishing design dosage calculation formula of the altitude correction factor of national standards in the gas fire-extinguishing system design code GB50370-2005 and Guangdong, Jiangsu, Zhejiang provinces and municipalities on the local standard gas extinguishing heptafluoropropane, IG-541, three fluorine methane, IG-100, dichlorohexafluoropropane amount of extinguishing agent design formula have the altitude correction factor K. The higher the altitude, the smaller the K value. This is because as the altitude rising, air gradually thin, progressively reduce atmospheric pressure, oxygen content in air, gas fire extinguishing agent is spraying placed in protective zone of diffusion is faster, more efficient control and fire extinguishing, fire extinguishing agent consumption can also be reduced accordingly. Internally the norms adopted international standards equivalent toThe gas fire extinguishing system-physical performance and system design on the ISO standard for the United States 14520 and clean gas extinguishing system design code NFPA2001. Its principle is when the protective zone of the altitude difference of atmospheric pressure for more than 11%, the amount of extinguishing agent design should be fixed. K value of approximate calculation formula is: in the Atlas section 8.8.5, general instructions, we will heptafluoropropane, IG-541, Chlorotrifluoromethane, IG-100 fire design usage or inerting design dosage calculation formula of the altitude correction coefficient (K) summarized as the following table: altitude (m) altitude correction factor K (m) altitude correction factor K (m) the correction factors K1.1300.8300.6901.0000.7850.6500.8850.7350.56516 on gas extinguishant pipeline Terminal installed in the previous national projects, gas fire extinguishing agent pipeline Terminal nozzle parts are generally equipped with 90 ° elbow installation method. United States via inspection of Wei company technical documents, the company has been stressed in the gas fire suppression systems, fire extinguishing agent pipeline Terminal should install a length not less than 2 inches of threaded pipe Cap (see figure below). The starting point of this is said to be considering the pipeline installation completes while designing explicitly for blowing, and you want to use repeatedly checking its clean white, but in works of the actual construction is very difficult to achieve 100 per cent. Therefore, Wei company as a general technical requirements in the pipeline Terminal nozzle parts set three links with short tube and pipe Hat plays the role of sewage collection, make sure that the nozzle is not blocked. We in the Atlas of 69 pages nozzle installation diagram using this approach. 17 gas extinguishing pipe material, installation and connection method 17.1 extinguishing pipes should be internal and external wall hot dipped galvanized steel tube and pipe fittings, coating thickness not less than 15 μ m. Pipeline specifications (outer diameter x wall thickness) as described in the Atlas on page 8. 17.2 installation in larger environments corrosive gas extinguishing pipes should be seamless stainless steel tube and pipe fittings. 17.3 extinguishing pipe connection, DN 80mm use thread connection; DN 100mm use flange connection. 17.4 thread connection, can adopt PTFE tape or anaerobic adhesive tape as a sealing material. Flange connection, General metal gasket seal. 17.5 network streaming should adopt tee fittings, the shunt export should be horizontally. It is strictly forbidden to use four-way fitting for streaming. 18 gas fire extinguishing system control requirements of the standard "18.1, pipeline gas fire extinguishing system should be set to automatically control, manual control and mechanical emergency operation three boot method. Cabinet type (no network) prefabricated gas extinguishing system should be set to automatically control and manual control two startup modes. It should be emphasized that this manual control, in fact or by electric means of manual control. Only through emergency operations agent storage bottle release valve manually initiator or combined distribution system protection area select valve manual Launcher starts on systems that are truly not dependent on electrical method of manual control. 18.2 automatic control startup method, should be set no greater than 30s of extinguishing agent delay spray. 18.3 automatic control device should receive two separate fire signal to start. 18.4 gas extinguishing system operation and control, should include the opening of the protective area closure system, ventilation equipment and fire protection valve, joint actions and control. 18.5 fire auto-alarm fire controllers to set in place for regular people. Unit independent system General settings in the protection area outside the main entrance; combined distribution system according to the project, it is set in a larger or more important protection area outside the main entrance. Conditions permit, the preference settings in fire control room or watch the room. Equipped with fire control room 18.6 projects, should be the protection area fire control system for fire information, fire-fighting action, manual and automatic conversion and system equipment failures and other related information to fire control rooms. 19 gas fire extinguishing systems for safety requirements for work on it was often 19.1 protection area fire design concentration and actual use of the concentration, should not be greater than extinguishing agent can have toxic effects. 19.2 gas fire extinguishing system with manual control and mechanical emergency actions should prevent misoperation of warning signs and measures. 19.3 is equipped with gas fire extinguishing system in place, should press building, storage bottles or floor as the unit configuration with two sets of air respirators. 20 gas fire-extinguishing system design time on other professional design requirements 20.1 on architectural and structural design requirements of 20.1.1 protection zone enclosure, doors and Windows, ceiling of fire resistance and protection zones envelope withstanding intrinsic pressure of the pressure, the pressure relief allowed the set location, and shall conform to the provisions of the code. 20.1.2 protection zones should be guaranteed in the 30s of the channel within the evacuation is complete and exports. 20.1.3 protection zone in the direction of the door should evacuate and opening themselves close. 20.1.4 extinguishing spray-and-drop, the protection zone in addition to opening pressure relief extraoral should be able to close. 20.1.5 storage bottle door should open outwards. Storage bottles and containers, plane between dimensions and floor bearing capacity should be able to meet the extinguishing agent storage installations layout requirements. 20.2 on HVAC professional design requirements of protection after 20.2.1 fire should ventilate area. 20.2.2 storage bottles-should have good ventilation. 20.3 on electrical professional design requirements 20.3.1 protection area should, in accordance with the relevant requirements of the standard "set of automatic fire alarm system, and selects the high sensitivity of the detector. 20.3.2 gas extinguishing system power supply should be consistent with the national fire protection technology standards. 20.3.3 protection zone of evacuation channels and export, should be set for emergency lighting and evacuation signs. 20.3.4 storage bottles should be located between emergency lighting. 20.3.5 after potentially explosive atmospheres and the Substation site, extinguishing pipe static grounded fortification.