GB 50974-2014 PDF English
US$145.00 · In stock · Download in 9 secondsGB 50974-2014: Technical code for fire protection water supply and hydrant systems Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 50974-2014 | English | 145 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Technical code for fire protection water supply and hydrant systems
| Valid |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB 50974-2014
GB 50974-2014: Technical code for fire protection water supply and hydrant systems---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB50974-2014
UDC GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
P GB 50974-2014
Technical code for fire protection
water supply and hydrant systems
Issued on January 29, 2014 Implemented on October 01, 2014
Issued by. Ministry of Housing and Urban-Rural Construction, P.R.C.
General Administration of Quality Supervision, Inspection
and Quarantine of People's Republic of China
Technical code for fire protection
water supply and hydrant systems
Compiled by. The ministry of public security of the People's Republic of China
Approved by. Ministry of Housing and Urban-Rural Construction, P.R.C.
Effective date. October 01, 2014
Beijing 2014
Announcement -- Ministry of Housing
and Urban-Rural Construction, P.R.C.
No.312
Table of Contents
1 General Provisions... 9
2 Terms and Symbols... 10
3 Design parameters... 15
4 Fire water... 39
5 Facilities of water supply... 45
6 Types of fire protection water supply... 62
7 Hydrant systems... 69
8 Pipeline works... 77
9 Fire protection drainage... 87
10 Hydraulic calculation... 89
11 Control and operation... 98
12 Installation... 102
13 System debugging and acceptance... 139
14 Maintenance and Management... 154
Appendix A Division of the partitioned project and item project of the fire water supply
system and fire hydrant system... 158
Appendix B The inspection record of the quality management in the construction site159
Appendix C The record on quality inspection during the construction process of the fire
water supply system and fire hydrant system... 161
Appendix D The Inspection Record of the Quality-control Data of Fire Water Supply and
Fire Hydrant Project... 166
Appendix E The Record on Acceptance of Fire Water Supply and Fire Hydrant System
Project... 167
Appendix F The Division of the Defective Items After the Acceptance of Fire Water
Supply System and Fire Hydrant System... 169
Appendix G Inspection Items of Maintenance and Management for Fire Water Supply
and Fire Hydrant System... 170
Explanation of Wording in This Code... 172
1 General Provisions
1.0.1 This Code is developed to properly design the fire water and fire hydrant system,
to ensure construction quality, to standardize inspection and maintenance
management, to reduce fire hazards and to protect personal and property safety.
1.0.2 This Code applies to the design, construction, inspection and maintenance
management of fire water and fire hydrant systems of the new construction,
expansion and renovation of industrial, commercial and municipal construction.
1.0.3 The design, construction, inspection and maintenance of fire water and
hydrant systems should follow the relevant national policies, and effective technical
measures should be taken combined with engineering features to achieve safety,
reliability, advanced technology, low-cost and utility, and environment protection.
1.0.4 The components and equipment of the fire water and hydrant system used in
project shall be products complying with the requirements of existing national
standards and access system.
1.0.5 The design, construction, inspection and maintenance of the fire water and
hydrant system shall not only comply with this Code, but also should be consistent
with existing national standards.
2 Terms and Symbols
2.1 Terms
2.1.1 Fire water
Water sources that provide fire water to water fire-extinguishing facilities,
vehicle-carried or hand-carried and other mobile fire pumps, fixed fire pumps,
including municipal water supply, fire reservoir, gravity fire reservoir and natural water
sources.
2.1.2 Constant high-pressure fire protection water supply system
The water supply system that always keeps the working pressure and flow required by
the water fire-extinguishing facilities and pressurizes directly without a fire pump in
fire.
2.1.6 Gravity fire reservoir
The water storage facility set in a high place that directly provides gravity water supply
for water fire- extinguishing facilities.
2.1.7 Elevated / gravity fire tank
The water storage facility set in a high place that directly provides gravity water
demand in initial fire disaster for water fire-extinguishing facilities.
2.1.11 Static pressure
The pressure at a point of the pipe in static in the fire water system pipe network,
referred to as static pressure.
2.2 Symbols
3 Design parameters
3.1 General requirements
3.1.1 The outdoor fire water demand of factories, warehouses, storage yards, storage
tank area or civil buildings should be determined according to the number of fires at
the same time and the outdoor fire water required for extinguishing a fire. The number
of fires at the same time should meet the following requirements.
3.1.2 The design flow rates of the fire water required for extinguishing a fire should
consist of the design flow rates of the various water fire-extinguishing systems that
need to function at the same time, including building outdoor fire hydrant system,
indoor fire hydrant system, automatic sprinkler system, foam extinguishing system,
water spray system, fixed fire monitor extinguishing system, fixed cooling water
system, and should meet the following requirements.
3.2 Fire flow rates for town
3.2.1 Fire flow rates for town shall be calculated and determined according to local fire
statistics, firefighting water demand statistics, fire water demand guaranteed rate,
building composition, municipal water supply network running rationality and other
factors based on comprehensive analysis.
3.3 Fire flow rates of outdoor hydrant for building
3.3.1 Fire flow rates of outdoor hydrant for building should be determined based on a
comprehensive analysis according to the building function, volume, fire rating, fire risk
and other factors.
3.4.7 The fire flow rates of full pressure, semi-frozen and full frozen liquid ammonia
tank shall be determined based on calculation according to the requirements of full
pressure and semi-refrigerated storage tank in Article 3.4.5 of this Code, but the spray
intensity shall be not less than 6.0L/ (min • m2) for calculation, and the fire flow rates
of the cooling water system of full frozen liquid ammonia tank should be calculated
according to the requirements that the full frozen liquefied hydrocarbon tank is a
single containment tank with steel outer wall.
4 Fire water
4.1 General requirements
4.1.1 Within the scope of urban and rural planning area, municipal fire water should
be planned, designed and implemented synchronously with municipal pipe network.
4.1.2 The fire water quality should meet the functional requirements of water
extinguishing facilities.
4.2 Municipal water supply
4.2.1 When the municipal water supply network provides continuous water, the
municipal water supply network may be used to supply water directly for the fire water
supply system.
4.3.2 Calculation of the effective volume of fire water should meet the following
requirements.
4.4 Natural water and others
4.4.1 Wells and other groundwater sources can be used as fire water.
4.4.2 If a well supplies water directly to the fire water system as fire water, its most
unfavorable water level should satisfy the water absorption requirements of the pump,
and the minimum flow and the pump head should meet the fire requirements;
4.4.4 If the outdoor fire water is natural water, technical measures should be
taken to prevent ice, float, suspended solids and other substances from
clogging the fire pump and to ensure the safety of taking water.
4.4.5 If natural water is used as the fire water, it should meet the following
requirements.
5 Facilities of water supply
5.1 Fire pump
5.1.1 The type of fire pump should be determined based on the reliability, installation
site, fire water, fire water flow rates, head design and other factors, the pump drive
should be direct drive by motor or diesel engine, and the fire pump should not be
dual-powered type with double motors or based on diesel engine.
5.1.6 The selection and application of fire pump shall meet the following requirements.
5.1.7 The main materials of fire pump shall comply with the following requirements.
5.1.10The fire pumps should be provided with standby pumps, with performance
consistent with that of the work pump, except for the following construction.
5.1.12 Fire pump suction should meet the following requirements.
5.2.5 The cells of elevated fire tanks should be well-ventilated, not frozen, and
should be provided with anti-freezing measures when it is necessary to set in
non-heating rooms in frost, cold places and places frozen in winter, with
ambient temperature or water temperature not less than 5℃.
5.3 Makeup pump
5.3.1 The makeup pump is preferably centrifugal pump and should meet the following
requirements.
5.3.2 The design flow rates of makeup pump should meet the following requirements.
5.3.4 The temporary high-pressure fire protection water supply system of makeup
pump should be provided with technical measures to prevent the makeup pump
starting and stopping frequently;
5.3.5 The suction pipe of makeup pump should be provided with a clear bar gate
valve, and the outlet pipe should be provided with a muffler check valve and clear bar
gate valve.
5.4 Fire department connection
5.5.15 The earthquake proof of independent fire pump room should meet local
seismic requirements and seismic measures should be taken according to local
earthquake proof intensity with 1 degree increased,
5.5.16 Fire pumps and control cabinets should be provided with security measures.
6 Types of fire protection water supply
6.1 General requirement
6.1.1 The fire water supply system should be based on building function, size, height,
fire rating, fire risk, importance, secondary disasters, business continuity, water
conditions and other factors to determine its reliability and type of water supply, and
should meet the flow and pressure required by water extinguishing systems.
6.1.3 Building outdoor should be provided with low pressure fire protection water
supply systems and should meet the following requirements if supplied by a municipal
water supply network.
6.1.4 The outdoor fire water of process unit areas, storage tank areas, storage yards
and other structures should meet the following requirements.
6.1.8 The high-pressure or temporary high-pressure fire protection water supply
system should be used indoor and should not be combined with the production and
domestic water supply system;
6.1.12 If the municipal water supply network can meet the production and domestic
water and the fire flow rates, and the municipal administration permits direct suction of
fire pumps, the fire pumps of temporary high-pressure fire protection water supply
system should draw water directly from the municipal water supply network, but the
town and municipal fire flow rates should be greater than the sum of the fire flow rates
of indoor and outdoor for building.
6.2 Vertical zone of water supply
6.2.5 If reduced pressure tank is used for vertical zone of water supply, the following
requirements should be met.
7 Hydrant systems
7.1 Types of system
7.1.1 The municipal hydrants and building outdoor hydrants should be wet fire hydrant
system.
7.1.2 A wet hydrant system should be used in places with indoor environment
temperature not below 4 °C and not above 70 °C.
7.2 Municipal hydrant
7.2.1 Municipal hydrants should be outdoor ground fire hydrant; in frost, cold places
and places frozen in winter should be provided with dry outdoor fire hydrants and
severe cold areas should be additionally provided with fire water cranes.
7.2.3 Municipal fire hydrants should be provided on the side of roads, appropriately
close to the crossroads; but if municipal roads are wider than 60m, municipal fire
hydrants should be intersected on both sides of the road.
7.2.7 The valves of municipal water supply network should be convenient for the use
and maintenance of municipal hydrants, and shall comply with the relevant provisions
of the current national standard Outdoor Water Supply Design Specifications GB
50013.
mark.
7.3 Outdoor hydrant
7.3.1 The arrangement of building outdoor hydrant shall not only comply with the
provisions of this Article, but also the relevant provisions of Article 7.2 of this Code.
7.3.2 The number of building outdoor hydrant should be determined based on the fire
flow rates of outdoor fire hydrant and protection radius; the protection radius shall not
be greater than 150.0m and the outflow of each outdoor hydrant should be l0L/
s~15L/s for calculations.
7.4 Indoor hydrant
7.4.1 The type of indoor hydrant should be determined according to the user, fire risk,
different fire extinguishing function and other factors.
7.4.2 The indoor hydrant configuration should meet the following requirements.
7.4.3 Each storey of the buildings equipped with indoor hydrants, including the
device storey, shall be provided with hydrants.
7.4.11 The water required by fire hose reel and portable fire hose may not be included
in the total amount of fire water.
7.4.16 The indoor hydrant system of city traffic tunnels should meet the following
requirements.
8 Pipeline works
8.1 General requirements
8.1.1 When the municipal water supply network is equipped with a municipal fire
hydrant, the following requirements shall be met.
8.1.2 The following fire water supply shall use loop water supply pipe network;
8.1.3 The main water duct supplying water for outdoor and indoor loop fire water
supply pipe network shall not be less than two. When one of it fails to work, the rest of
them shall be still able to meet the design flow of the fire water supply.
8.1.7 The water supply pipe network of indoor fire hydrant system shall be arranged
separately with automatic water sprinkler fire extinguishing system and other fire
extinguishing systems; when the firefighting pump is used at the same time, the water
supply pipeline shall be arranged separately before the alarm valve along with the
flow direction.
8.2 Pipeline design
8.2.1 The working pressure rating of the equipment, tools, pipefittings, valves and
accessories and system components used in fire water supply system shall be larger
than the system working pressure of the fire water supply system and the system shall
be ensured to be able to run safely and reliably at the possible maximum operation
pressure.
8.2.4 The buried pipeline shall be made from ductile iron pipe, steel wire Skeleton
plastic composite pipe, reinforced corrosion proof steel pipes and other pipes.
8.2.5 When the system working pressure of the buried pipeline is not larger than
1.20MPa, it is suitable to use water supply pipeline made from ductile iron pipe or
steel wire Skeleton plastic composite pipe;
8.2.10 The overhead water-filled pipes shall be arranged in the area with ambient
temperature being not less than 5°C.
9 Fire protection drainage
9.1 General requirements
9.1.1 Fire water drainage measures shall be taken to construction projects of fire
water supply system.
9.2 Fire protection drainage
9.2.1 Fire water drainage measures shall be taken for the following buildings and
locations.
9.2.3 The drainage facilities in the bottom hole of the fire elevator shall meet the
following requirements.
9.2.4 Technical measures shall be taken for indoor fire water drainage facilities to
prevent the flowing backward.
9.3 Drainage of system commissioning and testing
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB 50974-2014 be delivered?Answer: The full copy PDF of English version of GB 50974-2014 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB 50974-2014_English with my colleagues?Answer: Yes. The purchased PDF of GB 50974-2014_English will be deemed to be sold to your employer/organization who actually paid 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. www.ChineseStandard.us -- GB 50974-2014 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. How to buy and download a true PDF of English version of GB 50974-2014?A step-by-step guide to download PDF of GB 50974-2014_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB 50974-2014".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|