Weak current College】 【construction engineering technology and measurement (installation)-water supply and drainage, fire protection systems and installation the project handout --- Power By】 【China power house network.

<br> <br> I. Executive summary of this lesson is to introduce chapter IV pipeline project in the first section of the drainage system and the second section of the installation of fire-fighting system. Second, focus, difficulty to the composition of .the drainage system, classification, installation construction, fire protection, fire-fighting system of main components, features, applications, installation specifications. III. content presentation outline requirements 1, understanding the Xuan-professional system and its main components. 2. be familiar .with the Xuan-professional installation and commissioning process and related specifications. Chapter IV pipeline project pipeline is composed by the pipeline and the pipeline supports on the pipeline system. Pipeline component is used to connect or assembling pipeline components, including pipes, pipe fittings, flanges .and gaskets, fasteners, valves and expansion joints, flexible joints, pressure hoses, trap, filter and separator etc., pipeline supports mainly including Suspender, spring hanger, brace, supporting bar, saddle, pads, pedestal and sliding brackets, etc., .as well as tube crane, hoist (branch) ear, lifting clamp, fastening plate and skirt-pipe attachment pieces, etc. The first section to the installation of a drainage system, water supply systems (1) 1 indoor water supply system, the .system network arrangement of various water systems may, in accordance with the level of water in the pipe laying position, arranged down to the type, follow to the type and shape of the form of three networks. 2, indoor water supply system (1) .direct water ways. When the municipal water distribution system water quality, water quantity, water pressure can meet the requirements of the indoor water distribution, use feedwater directly. (2) set the cistern, the water pump. When the outdoor water distribution of indoor .water meets the requirements of water for most of the time is insufficient, use set tank, pump water. (3) of the feed water tank only set. When the outdoor water distribution of indoor water meets the requirements, but the lack of water pressure .cyclical every day, you can only set the high water tank makes outdoor pipe directly into the people inside a building, water tank located in the front of the building. <br> Example: the only way for water tank water is (). A .safe and reliable water supply, water supply pressure stability B, energy savings, the system simpler C, increased structural load D, easy installation and maintenance: C (4) set up pumps, the tank's water supply. This method is suitable for outdoor water .supply network pressure recurrent lower than indoor water supply network pressure required, but the water is sufficient, and indoor water consumption and very uneven. (5) vertical division of water supply. For layers more buildings, outdoor water supply network pressure does not meet the .indoor water flat, vertical partitions. The use of different water ways: l) low-water-supply, high in the direct area as the cistern, pumps, tanks of water. 2) set the cistern and water pumps, water tank partition parallel .water-supply mode. 3) pressure tank side-by-side water ways. 4) parallel direct water ways. 5) pump, tank partition-line water ways. 6) water tank and vacuum water supply. 7) valve water supply. .The water supply pipeline for high-rise buildings and are available with pressure relief valve. This water supply is high water pressure water ways, pressure tank pressure water supply and water supply without water tank pressure reducing valves, as shown in Figure 4.1.11. .With pressure relief valve of the biggest advantage is the occupation of a building area of little son disadvantage is the cost of running the engine water pump. Case study: Interior water-supply system in different ways with (). A direct water way, B ., water-supply mode vertical partition C, water pumps, water tanks of water-supply mode D, horizontal partition E-supply mode, only the water-supply mode-based water tank: ABCE (2) outdoor water supply system <br> .1. system composition to surface water is the source of the water supply system, generally consists of the following components: (1) water intake structures: from natural water sources water intake structure. (2) level pumping stations: water from the water intake .structure, the hydraulic pressure to a water pumping station, the structure of the structure. (3) water structures: dealing with water and water quality to meet the requirements of the structure. (4) clean water tank for collection, storage, regulation of .water structures. (5) secondary pump station: the clean water tank with water to the water tower or network structure. (6) water-borne by secondary pump station: to the Tower of the pipeline. (7) water tower: collection, .storage, regulation of water and water pressure people water distribution network architecture. (8) water distribution network: the water to the user. General outdoor water pipes can be narrowly interpreted as distribution network. 2. water distribution network arrangement of water distribution network based .on user requirements for water supply, arranged dendritic distribution system and the pipe two forms. 3. water distribution network in the laying of the way outdoor water distribution network generally use the laying of underground laying, soil depth not less than 0.7m and must be .local Cryo-line. Laying of location, usually along the road or parallel to the building. Water distribution pipe online every certain distance and fork branch locations and branch into buildings, set the gate valve and the valve shaft which is handy for maintenance. Example .: outdoor water distribution network generally use the laying of underground laying, soil depth not less than (). B.0.7 A.0.3 mmmm D.1.5 C.1.0 answers: B (3) the installation of water supply system, water supply equipment .1 water supply and water supply equipment including pumps, tanks, storage tanks, pressure water sharing equipment, etc. <br> Pump installation should be installed on the outlet valves, check valves and pressure gauge, and the measures to be taken waterproof hammer. .High water tanks for water storage and stable water pressure, the water tank is typically used for carbon steel plate, steel-reinforced concrete, glass and other materials. <br> Case study: water pump installed on the outlet () should be installed. .A, B, check valve, ball valve CD, E, discharge valve for pressure gauge: ACD 2, water supply pipe pipeline materials commonly used are as follows: l) and low pressure fluid transport galvanized welded steel tubes. Low pressure fluid transport galvanized .welded pipe formerly known as galvanized steel or white iron pipes, is applied to the water supply system of a pipe. 2) PVC pipe for water supply. Use the temperature does not exceed 45 ° c. 3) water polypropylene pipes. Apply to system .working pressure no more than the work temperature not 0.6MPa largeAt 70 degrees centigrade. 4) cast iron pipes for water supply. 5) lining plastic aluminum tube. Working temperature up to 90 ° c, suitable for transporting water, hot water and heating and .air conditioning. 3, the water supply pipeline installation (1) piping connections. L) and low pressure fluid transport galvanized welded steel tubes with screw connection. 2) water supply PVC pipe generally use the socket connection, where the socket to the outer diameter .of the adhesive suitable for 20-160mm, rubber ring connection applies to the outer diameter ≥ 63mm, and metal fittings, valves, etc. to connect with threaded or flange connection. Water hard PVC pipe thread connection, use of PTFE sealing belt as sealing .filler, not thick white paint, ramie yarn. 3) water using hot-melt polypropylene pipe socket connection. 4) stainless pipe welding or used for Argon-arc welding of thin copper tube connection, use Socket-brazing welding. <br> 5 .) cast iron pipes for water supply with rubber ring, asbestos cement or expansive cement socket interface connections, in the major traffic arteries etc. larger lot vibration using green lead interface. 6) ductile iron pipe with rubber ring mechanical interface or socket interface, they .can be threaded flange connections. Case study: building water systems generally use (). A £ ® axial-flow pump B £ ® diaphragm pump C £ ® Vortex pump D £ ® centrifugal pump answer: D (2) indoor water pipeline installation. .L) water supply piping and other common frame for laying pipes, suitable for laying in the drainpipe, frozen pipes above or hot water pipe, steam pipe. 2) branch pipe laying. ① cold and hot water pipes from top to bottom side-by .-side installation, hot water pipes in cold water pipes above; vertical parallel installation, hot water pipes in cold water pipe of the left. ② in sanitary ware installed in cold and hot water taps, hot water tap to the left of the cold faucet .. ③ Setup Woltman, table top and the valve should be 8-10 times the diameter of the pipe line meter, there should be other meter before and after not less than 300 mm line segment. 3) valve settings. ① water distribution valve selection .according to the following requirements: diameter less than or equal to 50mm, use globe valve; diameter greater than 50mm, use gate valves or valve. In bidirectional pipe, valves or valve should be used. In the segment that is frequently open and close, .use stop valve. Not frequently open and close and need quick on-off valve, the valve should be quick, but the distribution point is not appropriate to adopt the cock. ② pressure water supply for the partition, set the requirements are as follows: .oversize should set two sets, one set of alternate. Ring of water and settings in the automatic sprinkler system alarm valve before, you can set a single group. Pressure reducing valve, the valve should be installed before and should be fitted with pressure gauge. .Pressure reducing valve before loading the filter, and should be accessible to the sewage. 4) plastic pipe installation. Outdoor buried pipes with depth should not be less than 300mm. Water tank inlet and outlet, sewage pipes, tanks and piping between the valve shall .not use the plastic pipe. Hydraulic test 5). Indoor water supply pipe test pressure is the pressure of work, but 1.5 times shall not be less than 0.6MPa (water polypropylene pipes must not be less than the 1.0MPa). (3) .outdoor water pipeline installation. 1) Groove excavation. Groove width at the bottom of the excavation, anxiashijisuan: B = D1 + 2 (b1 + b2 + b3) artificial excavation Groove of groove depth exceeds 3m should be layered excavation, each layer of depth .not more than 2m. Layer of Taiwan width requirements when slope slot should be not less than 0.8m, straight grooves should not be less than 0.5m, install well point equipment should not be less than 1.5m. 2) auxiliary water cast iron pipe .. Outdoor water pipes should be buried laying, buried by the external loads, the pipe, pipe-and soil-Foundation, and other factors, General soil depth of not less than 0.7m, and should be in the frozen line. Pipeline low should .set the drain piping and valves, pipe protruding point peace straight segments of the necessary position should be installed in the exhaust valve. Water supply pipe should be arranged above the sewer pipe. When the water supply pipe in pipe side below, water supply pipe must .be using a metal pipe. Drinking water pipe and sewer or transfer of toxic liquid pipelines cross, water supply pipe should lay in the above, and should not have the interface overlap; when water supply pipeline laying below should be used steel pipe or steel casings ., casings out of the cross tube length is not less each side of the casing on both ends using 3m waterproof material closed. Tubing down the Groove tube under artificial or mechanical methods, usually under the pipe diameter is greater than when the use of mechanical 500mm .down tube. 3) PVC pipe for water supply of auxiliary set. <br> Outdoor water PVC pipe laying should be buried. In General, burial depth can be frozen line following 0.2m, and should meet the following criteria: when de ≤ 50mm ., tube top minimum depth to 0.5m; when de> 50mm, tube top minimum depth to 0.7m. Pipe in the immediate area and Groove, reliable soft belt hanger, and Groove Wall collision or ditch bottom heated. Trench backfill 4). Water .supply pipe laying and under the channel after passing through check, before the hydrostatic test should be carried out in a timely manner except for interfaces, called pipes on both sides of the backfill and tube top above the height of not less than 0.5m backfill. .Example: in the suction, should guarantee outdoor network pressure not less than (). A, B, C 0.02MPa 0.05MPa, 0.1MPa D, 0.5MPa answer: C <br> Second, the drainage system (a) of the drainage .system and mode 1, indoor drainage systems (1) the composition of the system. Indoor drainage system by water, the water bends, drainage pipes, snorkel and cleaning equipment, etc. (2) the system of classification. Indoor drainage system according to .the nature of the exclusion of water, can be divided into sewage, wastewater and stormwater systems. (3) a system of triage and confluent. Waste water drainage system should be based on the nature, quality, combining outdoor drainage system settings, comprehensive utilization .and water treatment requirements, uses the distribution system or combined. L) outdoor no sewer, waste water and life in General, domestic sewage wastewater diversion by septic tank treatment. When the outdoor has sewer, waste water from production waste water and life should be .combined. 2) when building a water system, domestic wastewater and sewage discharge should be split. 3) toxic and harmful substances in wastewater, contains a large number of domestic wastewater grease and the technical and economical comparison considers necessary recoveryUtilization of wastewater and industrial wastewater ., etc. should be split. 4) sewage shall be discharged from the confluence with the rain. 5) public kitchen waste before the oil and divert exhaust domestic sewage. 6) buildings should separate from the rain. 7) wastewater such as non- .organic material and with a large number of sand, minerals, the Agency processed can be discharged into the rainwater pipes. 2, outdoor drainage system outdoor drainage system by drainage pipes, manhole, foodstuffs, wells and rainwater outlets, etc. Case study: indoor .drainage system is composed by (). A, B, water drainage pipe C, snorkel and cleaning equipment, D, E, water supply pipe water bends the answer: ABCE (2), drainage, ventilation tube and pipe 1, major drainage facilities .(1) inspection openings and sweeping mouth. (2) the inspection well. (3) floor drain. 2. material 1) drainage cast iron pipe. PVC-u drainage pipe 2). Outdoor underground drainage PVC pipe for discharge temperature is not .greater than 40 ° c, transient temperature is not greater than 80 ° c, outdoor living and buried rainwater drainage system. (3) drainage pipe installation 1, pipe connection (1) drainage pipe with gray iron and ductile iron pipes with spigot connection, .its interface to hemp silk filled with cement or asbestos-cement play mouth for high-rise buildings also available green lead. Drainage with flexible interface cast iron pipe with rubber ring flange gland connection. (2) section-drainage cast iron pipe with sealing rubber .sleeve, stainless steel fastening set section. 2, indoor drainage pipe installation <br> Drainage cast iron pipe usually cut off wheel cutting machine, manual broken pipes, gasket in fracture, and then hands wood hammering gently beat sharp sickle is cut off. PVC .-u drainage pipe buried pipe jacking minimum embedment depth should be consistent with the relevant requirements, laying in the Green band, pipe covering not less than the minimum; laying 300mm in slip down in the community, the casing thickness of not less than 450mm; .burial in the community under the main road roadway, casing thickness of not less than 600-700mm. The second section of the installation of a fire-fighting system, fire hydrant system (a) indoor hydrant system of classification of indoor hydrant system is made .of fire-fighting water supply networks, fire hydrant, hoses, nozzles for fire hydrant Cabinet, fire water tank, fire water tank, pressure equipment, such as the composition of the fixed fire extinguishing system. 9 and 9 residential buildings (including the underlying .set of business service network of residential) and building height not exceeding 24 other civil construction workshop, storeroom and a single public buildings for the low-floor building. Low-use outdoor fire engine intake from outdoor water sources, direct fight room fire. For .10 and 10 storeys building, construction height is more than other 24m civil and industrial buildings as tall buildings. High-rise building indoor hydrant system is fighting high-rise buildings on the main compartment fire-fighting equipment. According to the outdoor fire water system .provides water, water pressure and building height, layers, indoor hydrant system of water-supply mode include the following: 1, pressure pump and water tanks of indoor hydrant system outdoor water distribution of water, water pressure at all times to meet the highest, .most room far away from the fire hydrant design flow and pressure requirements. In this way as a separate fire hydrant system. 2, the only set of indoor water hydrant system the system applicable to the flow of outdoor water pipe network to meet life, production ., fire-fighting water, but outdoor network pressure changes in the 1d relatively large. 3, fire pumps and water tanks of indoor hydrant system suitable for outdoor water and water pressure pipe network often cannot meet indoor hydrant system of initial fire water and water pressure .is required. <br> 4. the regional focus of Interior high-pressure fire hydrant system and indoor hydrant system temporarily high regional focus refers to a number of buildings in the region with 1 set of fire water tank and fire pump equipment, building fire .distribution by centralized fire pump room outlet attracting and self-shaped layout. 5, Division water indoor hydrant system when the height of the building exceeds 50m or fire hydrant's hydrostatic pressure over time, consider 800kPa mazhi hose and pressure pipe pressure resistance intensity should be used .in the partition of indoor hydrant water supply system, ie the area of their fire water system. Partitions are partitions series parallel partition and two. Case study: indoor hydrant system water way () water supply. A, B, only set tank fire pump .and tank C, no tank D, E, pressure water supply Division water pump and tank answers: ABDE (2) the main indoor hydrant system device 1, composed of indoor hydrant equipment indoor hydrant equipment by water gun, hose and fire hydrant. < .br> 2. set the indoor hydrant of tall buildings, senior industrial building, elevated to the Treasury, a or b factory fire hydrant spacing should not be greater than 30m; multiple layers or single-layer construction of fire hydrant spacing should not be greater .than 50m. Fire hydrant's for fire protection design should be in the ground 1.1m Department. (3) fire pump adapter for more than 4 levels of the plant and warehouse, senior industrial building, is equipped with fire fighting pipe networks House and more than .five layers of other buildings should be set within the pump adapter. Pump adapter forms of aboveground and underground and walls-3. (4) fire hydrant system hydrant press installation conditions into aboveground and underground. Aboveground fire hydrant most exposed surface, easy to find .and operate, but also easy to freeze, easily damaged and only applies to warm areas, underground fire hydrant sets fire hydrant wells, not easy to freeze and damage, applied to climate cold areas, but not easy to find and manipulate. <br> .Fire hydrant from street level should not exceed the margin of the housing wall 2m should not be less than 5 m. Second, the sprinkler system (a) automatic sprinkler system in accordance with the requirements and the environment, water spraying fire system can be divided .into: wet, dry type and role of three types. Sprinkler equipment according to shoot water fog characteristics and uses, and can be divided into the spray water cooling equipment, spray of water sprinkler fire-fighting equipment and fire-fighting equipment (also known .as sprinkler equipment). (1) automatic sprinkling wet extinguishing system. This system is mainly composed of closedNozzle, pipe systems, wet alarm valve, etc. The main drawback is not suited to cold regions. The ambient temperature should be between 4 ° c .and 70 ° c, wet sprinkler systems, working pressure between the inside and should not be greater than 1.2MPa. (2) automatic spray dry fire suppression system. The system applicable to the ambient temperature is below 4 ° c and above 70 ° c .and is not suitable for use in wet sprinkler fire extinguishing system. The main disadvantage is the role of time than some wet system slow. (3) automatic sprinkler fire-extinguishing system for wet or dry. (4) automatic sprinkling rain system. Systems .including open nozzle, pipe system, the deluge valve fire detector and auxiliary facilities. System control method has two kinds: one is the use of automatic sprinkler control valve to achieve the purpose of the control part of the network; the second is each group's tube .with heat detector to control the water inlet valve. The fire extinguishing system is typically installed in high fire hazard. (5) preaction sprinkler system. The system consists of the fire detection system, closed-type nozzle, preaction valve, pneumatic equipment and filled .with pressure or non pressure gas pipe, etc. Applies to not allow water loss of buildings, structures. (6) the water curtain devices. A building or a device such as the need to prevent the invasion of alien fire may be performed on the .device to secure, it is able to emit curtain lianzhuang water pipe network equipment, mainly by the curtain head pipes, automatic sprinkler control valve, manual control valve, the main pipe, etc. General and fire shutter or fireproof curtain, can also be used .to protect individually. (2) water spraying extinguishing system 1, system features and use the scope scope: the system is not only able to put solid fire, water mist's own electric insulation and mist droplet form will not cause liquid Huo splash, can be .used to fight the electrical equipment or flammable liquid fires. <br> Protection object: sprinkler system is mainly used for protection of fire danger, fire suppression difficult special equipment or facilities. Application: due to the cooling water spray, asphyxia, emulsifying, dilution .effect, so that the system for a wide range of uses, not only can be used for fire extinguishing, and also can be used to control the fire and protection of cooling, etc. 2. system composition stationary water spraying extinguishing system by high pressure .water equipment, control valve, water fog sprinkler, fire detection and automatic control system, etc. Centrifugal spray-water mist sprayer suitable for fighting electrical fires and protection of electrical facilities. (3) other commonly used fire-fighting facilities 1, carbon dioxide .fire extinguishing systems (1) the characteristics of the system and the range of use. Carbon dioxide fire extinguishing system is a kind of physical and chemical reaction of gas fire extinguishing system. Carbon dioxide fire extinguishing system is mainly used for fighting a, b, .c liquid fire, some gas fires, solid surface and electrical equipment, fire place, application there: l) oil-immersed transformer room, equipped with high-voltage capacitor can fuel, oil switch room and generator room; 2) telecommunications, broadcast and .television building, precision instruments, and valuable equipment room, large and medium-sized electronic computer room; 3) gas stations, archives, cultural reference room, library of the collector's room, etc.; 4) large and medium-sized ships cargo and .tanker oil tank, etc. Carbon dioxide does not apply to fight and lively fire metals and hydride (such as lithium, sodium, magnesium, aluminum, uranium etc), you can fire the oxygen supply of chemicals (such as nitric acid fiber and gunpowder ., etc.), incapable of decomposition and chemical fire. (2) the composition of the system. Carbon dioxide fire extinguishing system into the whole drown the fire extinguishing system and local application fire fighting systems. All submerged in the fire extinguishing system is made .up of carbon dioxide storage containers, containers, valves, pipes, operation control systems and ancillary equipment, etc. According to the protection of the region, the submerged systems can be divided into unit independent and group assignments. <br> Local application fire fighting .systems reserve by carbon dioxide cylinders, pipes and nozzles, control systems and ancillary equipment, etc. When a protection object has a large opening or unable to form the confined space of the site may use the system for fire fighting. 2, halon fire extinguishing .systems (1) the characteristics of the system and application trends. Can be used to fight the flammable and combustible liquids, gas fire, electrical equipment and combustible solid surface fire. Halon fire-extinguishing with high speed, on the protection of the objects have .defaced small features, widely used in certain not to put out the fire with water. Halon fire extinguishing agent in fire experiments or application process emissions to the atmosphere, the CFC substances on Earth atmospheric ozone layer damage, harm to the human environment. (2 .) the system of classification. Halon fire extinguishing agent is used mainly in the second one with a chlorine methyl bromide (1211 CF2ClBr: short title) and three of a methyl bromide (CF3Br: 1301). Halon fire extinguishing system according to system configuration, .all drown the fire extinguishing system and local applications and no fixed piping system. System components are stored in containers, container valve and cylinder head valve, select valve (relief valve) nozzle (nozzle), pipes and tube attachment. (4) dry powder .fire extinguishing system 1, powder extinguishing agent and dry powder fire extinguishing equipment for powder extinguishing agent is a mixture of dry ingredients and additives. There are generally dry powder extinguishing agent, use dry chemical and metal powder. Use dry chemical (also known as the .ABC class dry powder). In addition to fighting b, c and electrical equipment to be able to fire extinguishing fire General solid substances (hereinafter referred to as A kind of fire). Metal powder (also known as the D class dry powder). .Mainly used for Suppression of potassium, sodium, magnesium, and other combustible metal fire fire and BC class. Dry powder fire extinguishing installations shall not apply to fight such as nitrocellulose, pod etc can release oxygen combustion process or provide the oxygen source compounds of fire .; does not apply to combustion fire with Yin fire; also does not apply to fighting precision instruments, precision electrical equipment and electronic computer, such as a fire. 2, dry powder fire extinguishing device type dry powder extinguishing systems press start way with both manual .and automatic; press installation methods have fixed or semi-stationary Division; press system protection objects have full submersion and local fire extinguishing system. 3. system composition º fixed automatic control dry powder extinguishing system is mainly composed of dry chemical storage tank, the gas driven .fire extinguishing equipment, diameter gas and water pipes, valves (including pressure reducing valve, check valve, control valve, etc.), pipe fittings, nozzle and automatic control device (including fire detectors, boot bottle and control devices, alarm and control tray ., etc.), Etc. (5) foam fire extinguishing system foam fire extinguishing system is used as the extinguishing agent, liquid foam is mainly used for Suppression of non-water soluble solid combustible liquids and General fires. For water-soluble combustible liquid .fire should be used in anti-foam extinguishing. 1. system of classification and the use of foam fire extinguishing system with multiple types. Classification by foam foaming ratio is low, medium and high expansion foam fire extinguishing system, device installation use classification has fixed ., semi stationary and mobile foam fire extinguishing systems; press the foam injection position classification there is liquid on Jet and liquid injection foam extinguishing systems. (1) low expansion foam fire extinguishing system. Foam foaming multiples in 20 times as low expansion foam fire extinguishing .system, primarily used for Suppression of crude oil, gasoline, kerosene, diesel oil, methanol, acetone and other class b fire. General civil construction foam fire suppression systems, often using low expansion foam fire extinguishing system. Low expansion foam liquid has a normal .protein foam liquid, liquid Fluor protein foam, aqueous film forming foam liquid (light water foam liquid) and anti foam liquid, and so several types. Inappropriate use of low expansion foam fire extinguishing system in the fight against the flow of combustible liquid or gas .fires. In addition, it is not appropriate and water gun and spray system. <br> (2) multiple fire extinguishing system. Foam foaming ratio between 20-200 called the expansion foam fire extinguishing systems, typically used to control or fight combustible, .flammable liquid, solid surface fire and solid deep-smoldering fires. (3) high expansion foam fire extinguishing system. Foam foaming multiples in 200-1000 is called high-expansion foam fire extinguishing system, is a new type of foam extinguishing systems. Available .to fight the fire and A class B class a fire. High expansion foam thermal insulation properties. Non-toxic, smoke and toxic gases, to exclude fire isolation layer, formation, and in fire-fighting personnel harmless. Cannot be used to fight vertical .tank fire, not closed electrical equipment and in the absence of air environment in rapid oxidation of the strong antioxidants and chemical substances, fire (such as nitrocellulose, explosives, etc.). <br> (4) fixed foam extinguishing systems. Stationary foam .fire extinguishing system should be installed at the following places: l) zongzhuliang is greater than, equal to 500m3 independent non-water soluble, b, c liquid tank area. 2) zongzhuliang is greater than, equal to, the aqueous 200m3 a, b.