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GB 51427-2021 English PDF

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US$879.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB 51427-2021: Technical standard for auto tracking and targeting jet suppression system
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB 51427-2021	879	Add to Cart	6 days	Technical standard for auto tracking and targeting jet suppression system	Valid

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Basic data

Standard ID: GB 51427-2021 (GB51427-2021)
Description (Translated English): Technical standard for auto tracking and targeting jet suppression system
Sector / Industry: National Standard
Classification of Chinese Standard: P16
Word Count Estimation: 111,169
Issuing agency(ies): Ministry of Housing and Urban-Rural Development of the People's Republic of China; State Administration for Market Regulation

GB 51427-2021: Technical standard for auto tracking and targeting jet suppression system

---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 standard is formulated for the purpose of rationally designing automatic tracking and positioning jet fire extinguishing systems, ensuring construction quality, standardizing acceptance and maintenance management, reducing fire losses, and protecting personal and property safety. 1.0.2 This standard applies to the design, construction, acceptance and maintenance management of automatic tracking and positioning jet fire extinguishing systems in newly built, expanded and rebuilt civil and industrial buildings. This standard does not apply to the design, construction, acceptance and maintenance management of automatic tracking and positioning jet fire extinguishing systems in special functional buildings such as gunpowder, explosives, ammunition, pyrotechnics factories and warehouses, nuclear power plants and hangars. 1.0.3 The design, construction, acceptance and maintenance management of the automatic tracking and positioning jet fire extinguishing system should be closely combined with the function of the protected object, fire characteristics and system characteristics, so as to be safe, reliable, advanced in technology, and economical and reasonable. 1.0.4 The components, materials and equipment of the automatic tracking and positioning jet fire extinguishing system shall be selected from products that meet the relevant current national standards. 1.0.5 The design, construction, acceptance and maintenance management of the automatic tracking and positioning jet fire extinguishing system shall not only comply with this standard, but also comply with the current relevant national standards.

2 Terms and symbols

2.1 Terminology 2.1.1 auto tracking and targeting jet suppression system Using water as the jet medium, the detection device is used to automatically detect, track and locate the initial fire, and the automatic control method is used to realize the fixed fire extinguishing system of jet fire extinguishing, including fire extinguishing device, detection device, control device, water flow indicator, analog terminal Water testing device and main components such as pipe network and water supply facilities. Automatic tracking and positioning jet fire extinguishing system can be divided into automatic fire monitor fire extinguishing system, jet type automatic jet fire extinguishing system and spray type automatic jet fire extinguishing system. 2.1.2 automatic fire monitor system The fire extinguishing device is an automatic tracking and positioning jet fire extinguishing system with a flow rate greater than 16L/s. 2.1.3 eject type automatic jet system eject type automatic jet system The flow rate of the fire extinguishing device is not greater than 16L/s and not less than 5L/s, and the jet mode is a jet type automatic tracking and positioning jet fire extinguishing system. 2.1.4 spray type automatic jet system spray type automatic jet system The flow rate of the fire extinguishing device is not greater than 16L/s and not less than 5L/s, and the jet mode is a spray type automatic tracking and positioning jet fire extinguishing system. 2.1.5 fire extinguishing device fire extinguishing device Fire extinguishing equipment that sprays water media in the form of jets, including automatic fire monitors, jet-type automatic fire-extinguishing devices, and spray-type automatic fire-extinguishing devices. 2.1.6 Detection device fire detecting device It is a device with the functions of automatically detecting and locating the fire source, and transmitting the fire source signal to the control device. 2.1.7 control device control device The control and information processing components of the system are capable of receiving and processing fire detection signals in a timely manner, sending out control and alarm information, driving fire extinguishing devices to extinguish fire at fixed points, receiving feedback signals, and completing corresponding display and recording at the same time, and reporting to the fire alarm controller or fire linkage The controller is a device that transmits functions such as signals. 2.1.8 automatic control automatic control In the automatic state, the system automatically completes fire detection, alarm, and activates the fire extinguishing device to implement a control method for fire extinguishing. 2.1.9 manual control in fire control room It is a control method in which the personnel on duty manually start the fire pump, open the control valve, and adjust the fire extinguishing device to aim at the fire source to extinguish the fire through the system control host operation panel installed in the fire control room. 2.1.10 Manual control on site After the on-site personnel discover the fire, through the on-site control box, manually start the fire pump, open the control valve, and adjust the fire extinguishing device to aim at the fire source to implement a fire extinguishing control method. 2.2 Symbols Ch——Haichen-William coefficient; D - the design maximum protection radius of the fire extinguishing device; D0 - the maximum protection radius of the fire extinguishing device at the rated working pressure; d - the inner diameter of the pipe; dj - the calculated inner diameter of the pipe; h1—head loss along the way; h2—local head loss; hc——the minimum water pressure of the municipal pipe network when the fire pump directly pumps water from the urban municipal pipe network; i——head loss along the pipeline per unit length; L——calculate the length of the pipeline; N——Designed number of simultaneously activated fire extinguishing devices; P——Design pressure required by the fire pump or fire water supply system; P0 - the rated working pressure of the fire extinguishing device; Pe - the design working pressure of the fire extinguishing device; Q——the design flow rate of the system; q——the design flow rate of the fire extinguishing device; q0 - the rated flow rate of the fire extinguishing device; qg——pipe design flow rate; qn——the design flow rate of the nth fire extinguishing device; v - the average flow velocity in the pipeline; Z—the elevation difference between the inlet of the fire extinguishing device at the most unfavorable point and the lowest water level of the fire pool or the horizontal centerline of the water supply inlet pipe of the system; ζ——local resistance coefficient; ∑h——The total loss of water head in the pipeline from the outlet of the pump to the inlet of the fire extinguishing device at the most unfavorable point.

3 Basic Regulations

3.1 Applicable places 3.1.1 The automatic tracking and positioning jet fire extinguishing system can be used to put out fires in civil buildings, Class C production workshops, and Class C warehouses, and the following places where the fire category is Class A. 1 High and large space places with a headroom height greater than 12m; 2 The headroom height is greater than 8m and not greater than 12m, and it is difficult to install an automatic sprinkler system in a tall and large space. 3.1.2 The automatic tracking and positioning jet fire extinguishing system shall not be used in the following places. 1 There are often open fire operations; 2 Not suitable for water protection; 3 There is obvious occlusion; 4 The level of fire spreading is fast; 5 shelf area of high-bay warehouse; 6 The fire hazard level is the serious hazard level specified in the current national standard "Code for Design of Automatic Sprinkler System" GB 50084. 3.2 System selection 3.2.1 The selection of the automatic tracking and positioning jet fire extinguishing system shall be determined according to the fire category, fire hazard level, environmental conditions, space height, protection area characteristics and other factors of the installation site. 3.2.2 The fire hazard level of the location where the automatic tracking and positioning jet fire extinguishing system is installed can be classified according to the current national standard "Code for Design of Automatic Sprinkler System" GB 50084. 3.2.3 The type selection of automatic tracking and positioning jet fire extinguishing system should meet the following requirements. 1 A spray-type automatic jet fire extinguishing system or a spray-type automatic jet fire extinguishing system should be selected for places with light hazard level; 2.The spray type automatic jet fire extinguishing system, the spray type automatic jet fire extinguishing system or the automatic fire monitor fire extinguishing system should be selected for medium-dangerous places; 3 Class C warehouses should use automatic fire monitor fire extinguishing system; 4 One type of system should be adopted in the same protected area. When really necessary, a combination of the two types of systems can be used.

4 designs

4.1 General provisions 4.1.1 The automatic tracking and positioning jet fire extinguishing system shall be composed of fire extinguishing device, detection device, control device, water flow indicator, simulated terminal water test device and other components, as well as pipelines, valves and water supply facilities. 4.1.2 The arrangement of fire extinguishing devices shall be reasonably determined according to the building conditions such as the clearance height and plane layout of the installation site. 4.1.3 The design of the water supply pipeline of the automatic tracking and positioning jet fire extinguishing system shall meet the following requirements. 1 The wet pipeline shall be used before the automatic control valve; 2 In places where freezing may occur, anti-freezing measures shall be taken; 3 The length of the dry pipeline after the automatic control valve should not be greater than 30m. 4.2 Design parameters 4.2.1 The automatic fire monitor fire extinguishing system and the jet type automatic jet fire extinguishing system shall ensure that the jets of at least two fire extinguishing devices can reach any part of the protected area. 4.2.2 When the automatic fire monitor fire extinguishing system is used to extinguish fires in civil buildings, the flow rate of a single cannon should not be less than 20L/s; when it is used to extinguish fires in industrial buildings, the flow rate of a single cannon should not be less than 30L/s 4.2.3 When the spray type automatic jet fire extinguishing system is used to extinguish fires in places with light hazards, the flow rate of a single fire extinguishing device shall not be less than 5L/s; when it is used to extinguish fires in places with medium dangers, the flow rate of a single fire extinguishing device shall not Less than 10L/s. 4.2.4 The arrangement of the fire extinguishing devices of the sprinkler type automatic jet fire extinguishing system shall enable the jet to completely cover the protected place and protected objects. The design parameters of the system should not be lower than those specified in Table 4.2.4. 4.2.5 The designed simultaneous opening quantity of fire extinguishing devices of automatic fire monitor fire extinguishing system and jet type automatic jet fire extinguishing system shall be determined as 2 sets. 4.2.6 The designed number of simultaneously activated fire extinguishing devices of the sprinkler type automatic jet fire extinguishing system shall be determined according to the maximum number of fire extinguishing devices that may activate the jet when a fire occurs at any point in the protected area, and shall comply with the requirements in Table 4.2.6. 4.2.7 The design flow rate of the automatic tracking and positioning jet fire extinguishing system shall be the sum of the flow rates of fire extinguishing devices that are designed to be opened at the same time, and shall not be less than 10L/s. 4.2.8 The design continuous water spraying time of the automatic tracking and positioning jet fire extinguishing system shall not be less than 1h 4.2.9 The selection of fire extinguishing devices shall meet the following requirements. 1 The maximum protection radius of the fire extinguishing device shall be determined according to the index value of the product at the rated working pressure; 2 When the design working pressure of the fire extinguishing device is different from the rated working pressure of the product, it should be selected within the working pressure range specified by the product. 4.2.10 When the design working pressure is not the rated working pressure, the design maximum protection radius of the fire extinguishing device shall meet the following requirements. 1 The automatic fire monitor and spray type automatic jet fire extinguishing device shall be calculated according to the following formula. In the formula. D——the design maximum protection radius of the fire extinguishing device (m); D0 - the maximum protection radius of the fire extinguishing device at the rated working pressure (m); Pe - the design working pressure of the fire extinguishing device (MPa); P0——The rated working pressure of the fire extinguishing device (MPa). 2 The spray type automatic jet fire extinguishing device shall be determined according to the product performance. 4.2.11 The distance between the fire extinguishing device and the end wall should not exceed half of the distance between the fire extinguishing devices arranged in the same direction. 4.3 System components 4.3.1 The fire extinguishing device should meet the anti-corrosion requirements of the corresponding use environment and medium, and should meet the following regulations. 1 The pitching and horizontal rotation angles of automatic fire monitors and spray-type automatic jet fire extinguishing devices shall meet the requirements for use; 2 The automatic fire monitor shall have the direct current-spray conversion function. 4.3.2 The performance parameters of automatic fire monitor, spray type automatic jet fire extinguishing device and spray type automatic jet fire extinguishing device shall meet the requirements in Table 4.3.2-1~Table 4.3.2-3. 4.3.3 The design of fire extinguishing device installation should meet the following requirements. 1 The installation location should meet the requirements for normal use and maintenance of the fire extinguishing device; 2 The fixed bracket or installation platform shall be able to meet the requirements of spraying and spraying reaction force of the fire extinguishing device, and the structural design shall be able to meet the requirements of normal use of the fire extinguishing device. 4.3.4 The design of the detection device shall meet the following requirements. 1 The composite detection method shall be adopted, and it shall be able to effectively detect and determine the fire source in the protected area; 2 The monitoring radius should match the protection radius or protection range of the corresponding fire extinguishing device; 3 The layout of the detection device should ensure that there is no detection blind area in the protection area; 4 The detection device should meet the dustproof, waterproof and anti-interference requirements of the corresponding use environment. 4.3.5 The control host should have a communication interface with the automatic fire alarm system and other linkage control equipment. 4.3.6 The control host and field control box should have the following functions. 1 The horizontal, pitching and turning actions and jet state conversion of the automatic fire monitor or jet-type automatic jet fire extinguishing device shall be controlled; 2 The opening and closing of the automatic control valve shall be controlled; 3 The fire water pump should be started remotely, but the fire water pump should not be stopped automatically and remotely; 4.When the control host is in the automatic control state, it should control the action of the fire extinguishing device according to the set program; 5 The control host should have the status display function of fire pumps, fire extinguishing devices, automatic control valves, signal valves and water flow indicators, etc.; 6 The on-site control box shall have the function of displaying the status of fire pumps, automatic control valves, etc. 4.3.7 In addition to complying with Article 4.3.6 of this standard, the control host should also have the following functions. 1 self-test function; 2 sound and light alarm function; 3 Fault alarm function; 4 Muffling reset function; 5 Alarm information display, memory and printing functions; 6 Fire scene video real-time monitoring and recording functions. 4.3.8 In addition to complying with Article 4.3.6 of this standard, the field control box shall also meet the following requirements. 1.It should be installed near the fire extinguishing device, which is convenient for on-site manual operation, and the action of the fire extinguishing device should be observed; 2 There should be measures to prevent misuse. 4.3.9 The system should be equipped with sound and light alarms, and should meet the following requirements. 1 Sound and light alarms should be evenly installed in the protected area, which can be used together with the automatic fire alarm system; 2 The sound pressure level of sound and light alarms should not be less than 60dB; in places where the ambient noise is greater than 60dB, the sound pressure level should be 15dB higher than the background noise. 4.3.10 The water flow indicator shall meet the following requirements. 1 The water flow indicator shall be installed on the water supply branch pipe of each automatic fire monitor, spray type automatic fire extinguishing device, and each group of spray type automatic fire extinguishing device, and shall be installed after the outlet of the manual control valve; 2 The nominal pressure of the water flow indicator should not be less than 1.2 times the working pressure of the system; 3.The water flow indicator should be installed in a position that is convenient for maintenance. When installed in the suspended ceiling, the suspended ceiling should reserve an inspection hole; 4 The nominal diameter of the water flow indicator shall be the same as that of the water supply branch pipe. 4.3.11 The most unfavorable point of the pipe network in each protected area should be equipped with a simulated terminal water test device, and it should be easy to drain. 4.3.12 The water testing device at the simulated terminal shall be composed of detection parts, pressure gauge, automatic control valve, manual water testing valve, water testing joint and drain pipe, and shall meet the following requirements. 1 The detection components should be consistent with the model and specification adopted by the system; 2 The nominal diameter of the automatic control valve and the manual water test valve shall be the same as the pipe diameter of the water supply branch pipe in front of the fire extinguishing device; 3 The flow coefficient (K value) of the water test joint should be the same as that of the fire extinguishing device. 4.3.13 The outlet water of the simulated terminal water testing device shall be discharged into the drainage pipe by means of orifice outlet. The drainage standpipe should be equipped with a top-extending ventilation pipe, and the diameter of the pipe should be determined by calculation and should not be less than 75mm. 4.3.14 The water testing device at the simulated terminal should be installed in a place convenient for operation testing. 4.3.15 The water testing device at the simulated end shall be clearly marked, the height of the water testing valve fr......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB 51427-2021_English be delivered?

Answer: Upon your order, we will start to translate GB 51427-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB 51427-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB 51427-2021_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+ countries

Question 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.