GB 50219-2014 English PDFUS$2879.00 · In stock
Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 50219-2014: Code of design for water spray extinguishing systems Status: Valid GB 50219: Historical versions
Basic dataStandard ID: GB 50219-2014 (GB50219-2014)Description (Translated English): Code of design for water spray extinguishing systems Sector / Industry: National Standard Classification of Chinese Standard: P16 Classification of International Standard: 13.220.10 Word Count Estimation: 137,149 Date of Issue: 10/9/2014 Date of Implementation: 8/1/2015 Older Standard (superseded by this standard): GB 50219-1995 Quoted Standard: GB 50116; GB 50141; GB 50166; GB 50184; GB 50231; GB 50235; GB 50236; GB 50242; GB 50275; GB 50683; GB/T 985.1; GB/T 985.2; GB 5135.11; DL/T 5352 Regulation (derived from): People's Republic of China Housing and Urban-Rural Development Ministry Bulletin No. 582 Issuing agency(ies): Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Summary: This Standard applies to new construction, expansion and renovation project designed to set water spray systems, construction, inspection and maintenance management. This specification does not apply to portable water spray fire extinguishing system or se GB 50219-2014: Code of design for water spray extinguishing systems---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.1 General 1.0.1 This specification is formulated in order to reasonably design the water spray fire extinguishing system (or system for short), ensure its construction quality and use function, reduce fire hazards, and protect personal and property safety. 1.0.2 This code is applicable to the design, construction, acceptance and maintenance management of the water spray fire extinguishing system installed in new construction, expansion and reconstruction projects. This specification does not apply to mobile water spray fire extinguishing devices or water spray fire extinguishing systems installed in transportation vehicles. 1.0.3 The water spray fire extinguishing system can be used to extinguish solid material fires, Class C liquid fires, beverage fires and electrical fires, and can be used for protective cooling of production, storage devices or loading and unloading facilities of combustible gases and Class A, B and C liquids. 1.0.4 The water spray fire extinguishing system shall not be used to extinguish fires that can cause combustion and explosion due to chemical reactions when contacted with water, and fires that water mist will cause obvious damage to the protected objects. 1.0.5 The design, construction, acceptance and maintenance management of the water spray fire extinguishing system shall not only comply with the provisions of this specification, but also comply with the provisions of the current relevant national standards. 2 Terminology and symbols2.1 Terminology 2.1.1 water spray fire protection system water spray fire protection system It is composed of water source, water supply equipment, pipeline, deluge alarm valve (or electric control valve, pneumatic control valve), filter and water mist nozzle, etc., spraying water mist to the protected object for fire extinguishing or protective cooling system. 2.1.2 transfer pipe A pipeline that detects fires using closed nozzles and transmits signals using changes in air or water pressure. 2.1.3 supply intensity application density The amount of water sprayed by the system to the unit protection area per unit time. 2.1.4 response time response time The time from the start of the water supply facilities of the system to the spraying of water mist from the water mist nozzle at the most unfavorable point in the system. 2.1.5 spray nozzle Under the action of a certain pressure, the water flow can be decomposed into water droplets with a diameter of less than 1mm in the set area, and the nozzles can be sprayed out according to the designed sprinkling shape. 2.1.6 effective range effective range When the nozzle is spraying horizontally, the horizontal distance between the highest point of the water mist and the plane where the nozzle is located is perpendicular to the axis of the nozzle. 2.1.7 water spray cone water spray cone The cone formed by the water mist within the effective range of the water mist nozzle. 2.1.8 Deluge alarm valves unit It is a device composed of deluge alarm valve, solenoid valve, pressure switch, hydraulic alarm bell, pressure gauge and supporting general valves. 2.2 Symbols B - the distance between the nozzle of the water mist nozzle and the protected object; Ch——Haichen-William coefficient; dj - the calculated inner diameter of the pipe; dg—calculated inner diameter of throttle tube; g - acceleration of gravity; H——The head of the fire pump or the supply pressure of the system inlet; Hk - the head loss of the decompression orifice; Hg—the head loss of the throttling tube; hz—the elevation difference between the water mist nozzle at the most unfavorable point and the system pipe entrance or the lowest water level of the fire pool; ∑h——The sum of the head loss along the system pipeline and the local head loss; i - head loss per unit length of the pipeline; K——The flow coefficient of the water mist nozzle; k - safety factor; L - the length of the throttle tube; N—the calculated number of water mist nozzles required for the protected object; n——the number of water mist nozzles sprayed at the same time after the system is started; P - the working pressure of the water mist nozzle; P0 - the working pressure of the water mist nozzle at the most unfavorable point; Q——the flow rate of the deluge alarm valve; q - the flow rate of the water mist nozzle; qi - the actual flow rate of the water mist nozzle; qg——the flow rate of water in the pipeline; Qj——calculated flow rate of the system; Qs——design flow rate of the system; R—the radius of the bottom circle of the water mist cone; S - the protection area of the protection object; V - the flow rate of water in the pipeline; Vk——the average flow velocity of water in the pipeline behind the decompression orifice; Vg - the average flow velocity of water in the throttle tube; W——design supply intensity of protected object; θ ——the atomization angle of the water mist nozzle; ξ ——local resistance coefficient of decompression orifice; ζ ——The sum of the local resistance coefficients of the reducer and expander in the throttling tube. 3.1 Basic design parameters 3.1.1 The basic design parameters of the system should be determined according to the protection purpose and protection object. 3.1.2 The supply intensity and continuous supply time of the system should not be less than those specified in Table 3.1.2, and the response time should not be greater than those specified in Table 3.1.2. Table 3.1.2 Supply intensity, continuous supply time and response time of the system Continued Table 3.1.2 Note. 1 For the system adding water-based fire extinguishing agent, its supply strength shall be determined by tests. 2 Steel single-disc, double-disc and open compartment internal floating roof tanks shall be treated as floating roof tanks. Other internal floating roof tanks shall be treated as fixed roof tanks 3.1.3 The working pressure of the water mist nozzle should not be less than 0.35MPa when it is used for fire extinguishing; it should not be less than 0.2MPa when it is used for protective cooling, but it should not be less than 0.15MPa for Class A, B, B and C liquid storage tanks 3.1.4 Unless otherwise specified in this specification, the protected area of the protected object shall be determined according to its outer surface area and shall meet the following requirements. 1 When the shape of the protected object is irregular, it should be determined according to the outer surface area of the smallest regular shape containing the protected object. 2 The protection area of the transformer shall be determined by the outer surface area of the transformer oil tank except the area of the bottom surface, and shall also include the outer surface area of the radiator and the projected area of the oil conservator and oil sump. 3 The protection area of the cables laid in layers shall be determined according to the outer surface area of the smallest regular shape containing the cables as a whole. 3.1.5 The protection area of the liquefied petroleum gas bottle room shall be determined according to its use area, and the protection area of the liquefied petroleum gas cylinder storage, pottery altar or barrel wine storage shall be determined according to the building area of the fire compartment. 3.1.6 The protection area of the conveyor belt should be determined according to the upper surface area of the upward belt; the long-distance belt should be protected in sections, but the length of each section should not be less than 100m. 3.1.7 The protection area of an open container should be determined according to its liquid surface area. 3.1.8 For Class A and B liquid pumps, combustible gas compressors and other related equipment, the protection area shall be determined according to the projected area of the corresponding equipment, and the water mist shall envelop the sealing surface and other key parts. 3.1.9 When the system is used to cool Class A, B, and C liquid storage tanks, its cooling range and protection area shall meet the following requirements. 1 The above-ground fixed-roof storage tank on fire and the adjacent above-ground storage tanks within 1.5 times the diameter of the burning tank from the fire tank wall shall be cooled at the same time. When there are more than 3 adjacent above-ground storage tanks, the three larger tanks may Adjacent storage tanks calculate the cooling water consumption for fire fighting. 2 The floating roof tank on fire shall be cooled, and its adjacent storage tank may not be cooled. 3 The protection area of the fire tank shall be calculated according to the outer surface area of the tank wall, and the protection area of adjacent tanks may be calculated according to the outer surface area of the part that actually needs to be cooled, but shall not be less than 1/2 of the outer surface area of the tank wall. 3.1.10 When the system is used to cool full-pressure and semi-refrigerated liquefied hydrocarbon or similar liquid storage tanks, its cooling range and protection area shall meet the following requirements. 1 The fire tank and the adjacent tanks within 1.5 times the diameter of the fire tank from the fire tank wall shall be cooled at the same time; when there are more than 3 adjacent tanks, the fire cooling water consumption may be calculated based on the 3 larger adjacent tanks. 2 The protection area of the fire tank shall be calculated according to the external surface area of the tank, and the protection area of adjacent tanks shall be calculated according to 1/2 of the external surface area of the tank. 3.1.11 When the system is used to cool fully refrigerated liquefied hydrocarbon or similar liquid storage tanks, its cooling range and protection area shall meet the following requirements. 1 For single-containment tanks with steel outer walls, the ignition tank and adjacent tanks within the range of 1.5 times the diameter of the ignition tank from the ignition tank wall shall be cooled at the same time. The protection area of the fire tank shall be calculated according to the external surface area of the tank, and the protection area of adjacent tanks shall be calculated according to the sum of 1/2 of the external surface area of the tank wall and the external surface area of the tank roof. 2 For double-containment tanks without filling material between the concrete outer wall and the storage tank, the tank wall and roof of the fire tank and the roof of adjacent tanks within 1.5 times the diameter of the fire tank wall shall be cooled simultaneously. 3 As for the double-capacity tank filled with insulation material between the concrete outer wall and the storage tank, the tank roof of the fire tank and the roof of the adjacent tank within 1.5 times the diameter of the fire tank wall shall be cooled at the same time. 4 For a full-containment tank with a concrete outer wall, when the inlet and outlet of the pipeline are on the tank roof, the cooling range shall include the pump platform on the tank roof, and should include pipe belts and steel ladders. 3.2 Arrangement of nozzles and pipes 3.2.1 The number of water mist nozzles required for the protected object shall be calculated and determined according to Article 7.1.1 and Article 7.1.2 of this code based on the design supply intensity, protection area and characteristics of water mist nozzles. Unless otherwise specified in this specification, the nozzles should be arranged so that the water mist can be sprayed directly to and cover the protected objects. If the requirements cannot be met, additional water mist nozzles should be installed. 3.2.2 The safe clear distance between water mist nozzles, pipelines and live (exposed) parts of electrical equipment should comply with the provisions of the current industry standard "Technical Regulations for Design of High-Voltage Power Distribution Devices" DL/T 5352. 3.2.3 The distance between the water mist nozzle and the protected object shall not be greater than the effective range of the water mist nozzle 3.2.4 The planar arrangement of water mist nozzles may be rectangular or rhombus. When arranged in a rectangular shape, the distance between the water mist nozzles should not be greater than 1.4 times the radius of the water mist cone bottom of the water mist nozzles; when arranged in a diamond shape, the distance between the water mist nozzles should not be greater than 1.7 times the water mist nozzles The radius of the bottom circle of the water mist cone. The radius of the bottom circle of the water mist cone shall be calculated according to the following formula. In the formula. R—the radius of the water mist cone bottom circle (m); B——the distance between the nozzle of the water mist nozzle and the protected object (m); θ ——the atomization angle of the water mist nozzle (°). 3.2.5 When the protected object is an oil-immersed power transformer, the layout of the water mist nozzles should meet the following requirements. 1 Water mist nozzle protection shall be provided for the orifice of transformer insulator rising seat, oil conservator, radiator and oil sump; 2 The horizontal and vertical distances between water mist nozzles shall meet the requirements for the intersection of water mist cones. 3.2.6 When the protected objects are Class A, B, C liquid and flammable gas storage tanks, the distance between the water mist nozzle and the outer wall of the protected storage tank should not be greater than 0.7m. 3.2.7 When the protected object is a spherical tank, the layout of the water mist nozzles should meet the following requirements. 1 The nozzle of the water mist nozzle should face the center of the ball; 2.The water mist cones should intersect along the latitude direction and connect along the meridian direction; 3 When the volume of the spherical tank is not less than 1000m3, the water mist cones should intersect along the latitude direction, and should be connected along the meridian direction, but the distance between the ring pipes above the equator should not be greater than 3.6m; 4 The steel pillars of the spherical tank without a protective layer, the tank liquid level gauge, valves, etc. shall be protected by water mist nozzles. 3.2.8 When the protection object is a horizontal storage tank, the arrangement of the water mist nozzles should make the water mist completely cover the exposed surface, and the water mist nozzles should also be installed for protection of the tank liquid level gauge and valves. 3.2.9 When the protection object is cables, the water mist nozzles should be arranged so that the water mist completely surrounds the cables. 3.2.10 When the protection object is the conveyor belt, the arrangement of the water mist nozzles should make the water mist completely envelop the head, tail and upper surface of the upward belt of the conveyor on fire. 3.2.11 When the protected objects are indoor oil-fired boilers, electro-hydraulic devices, hydrogen-sealed oil devices, generators, oil circuit breakers, steam turbine oil tanks, and coal mill lubricating oil tanks, the water mist nozzles should be arranged around the top of the protected objects, and The water mist should be sprayed directly to and completely cover the protected object. 3.2.12 The system used to protect Class A, B, and C liquid storage tanks shall meet the following requirements. 1 The cooling water ring pipe of fixed roof storage tanks and internal floating roof storage tanks treated as fixed roof storage tanks should be arranged along a single ring at the top of the tank wall. The supply intensity shall be calculated twice as specified in Table 3.1.2 of this code. 2 When the wind resistance ring or reinforcement ring of the storage tank has no flow diversion facilities, a cooling water ring pipe shall be arranged under it. 3 When the cooling water ring pipe on the storage tank is divided into two or more arc-shaped pipe sections, the arc-shaped pipe sections should not be connected, and the water pipes should be connected from the outside of the fire dike, and the water inlet outside the fire dike should be connected separately. A control valve that can identify the opening and closing state is installed on the pipeline. 4 The cooling water standpipe shall be fixed on the tank wall with pipe clips, and the distance between them should not be greater than 3m. The lower end of the standpipe should be equipped with a rust cleaning port, and the distance between the rust cleaning port and the top surface of the tank foundation should be greater than 300mm, and the length of the pipe section collecting rust should not be less than 300mm. 3.2.13 For systems used to protect liquefied hydrocarbon or similar liquid storage tanks and Category A, B, B, and C liquid storage tanks, the connection between the standpipe and the horizontal piping in the tank group shall be able to eliminate the stress caused by the settlement of the storage tank. 3.2.14 The distance between the ring pipe supports on the liquefied hydrocarbon storage tank should be 3m~3.5m.4 System components4.0.1 The products and components used in the system shall comply with the current relevant national standards. Products and components subject to compulsory certification in accordance with the law shall have valid certification documents that meet the requirements of the market access system. 4.0.2 The type selection of water mist nozzles should meet the following requirements. 1 To extinguish electrical fires, centrifugal atomization water mist nozzles should be used; 2 The water mist nozzles installed in indoor dusty places should be equipped with dustproof caps, and the water mist nozzles installed outdoors should be equipped with dustproof caps;3 Centrifugal atomization water mist nozzle should be equipped with columnar filter4.0.3 According to the provisions of Table 3.1.2 of this specification, the system with a response time not greater than 120s shall be equipped with a deluge alarm valve group, and the function and configuration of the deluge alarm valve group shall meet the following requirements. 1 The deluge alarm valve group receiving the electric control signal should be able to be opened electrically, and the deluge alarm valve group receiving the transmission pipe signal should be able to be opened hydraulically or pneumatically; 2.It should have remote manual control and on-site emergency mechanical start-up functions; 3 The opening and closing status of the deluge alarm valve should be displayed on the control panel; 4.It is advisable to drive the hydraulic alarm bell to alarm; 5 Pressure gauges should be installed at the inlet and outlet of the deluge alarm valve; 6 A flushable filter should be installed before the solenoid valve. 4.0.4 When the system water supply control valve adopts electric control valve or pneumatic control valve, it shall meet the following requirements. 1 It should be able to display the open and closed state of the valve; 2.It should have the function of receiving the control signal to open and close the valve; 3 The opening time of the valve should not be greater than 45s; 4 It should be able to alarm when the valve fails, and display the cause of the failure; 5.It should have the function of on-site emergency mechanical start; 6 When the valve is installed in the valve well, the valve stem of the valve should be lengthened, and the electric actuator should be higher than the top of the well; 7 The pneumatic valve should be equipped with a reserve gas tank, and the volum......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 50219-2014_English be delivered?Answer: Upon your order, we will start to translate GB 50219-2014_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 7 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB 50219-2014_English with my colleagues?Answer: Yes. The purchased PDF of GB 50219-2014_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB 50219-2014?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB 50219-2014 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
