GB 27898.4-2025 Fixed water supply equipment used for fire-protection—Part 4: Gas driven fixed water supply equipment used for fire-protection English, Anglais, Englisch, Inglés, えいご
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ICS 55.200
CCS H 57
National Standard of the People's Republic of China
GB 27898.4-2025
Fixed water supply equipment used for fire-protection - Part 4: Gas driven fixed water supply equipment used for fire-protection
固定消防给水设备 第4部分：消防气体顶压给水设备
Issue date: 2025-10-31 Implementation date: 2026-11-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
Introduction
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
4.1 Product Classification
4.2 Model Compilation
5 Requirements
5.1 Basic Parameters
5.2 Equipment Composition and Components
5.3 Appearance and Marking
5.4 Control Functions
5.5 Water Supply Capacity
5.6 Continuous Operation
5.7 Sealing Performance
6 Test Methods
6.1 Basic Requirements for Tests
6.2 Inspection of Basic Parameters
6.3 Inspection of Structural Components
6.4 Inspection of Appearance and Markings
6.5 Control Function Tests
6.6 Water Supply Capacity Tests
6.7 Continuous Operation Tests
6.8 Intermittent Operation Tests
7 Inspection Rules
7.1 Classification and Items of Inspection
7.2 Sampling Method
7.3 Judgement of Inspection Results
8 Marking and Operation Manual
8.1 Marking
8.2 Operation Manual
9 Packaging, Transportation, and Storage
9.1 Packaging
9.2 Transportation
9.3 Storage
1 Scope
This document specifies the classification, requirements, test methods, inspection rules, marking, and operation manual, as well as packaging, transportation, and storage for fire - protection gas - driven fixed water supply equipment.
This document applies to fire - protection gas - driven fixed water supply equipment.
2 Normative References
The contents of the following documents are incorporated into this document by reference. Where a date is specified, only the version corresponding to that date applies to this document. Where no date is specified, the latest version (including all amendments) applies to this document.
GB/T 150 (all parts) Pressure Vessels
GB/T 1226 General Pressure Gauges
GB/T 1227 Precision Pressure Gauges
GB/T 5099.1 Steel Seamless Gas Cylinders — Part 1: Steel Cylinders with Quenched and Tempered Heat Treatment and Tensile Strength Less Than 1100 MPa
GB/T 5100 Steel Welded Gas Cylinders
GB 5135.6 Automatic Sprinkler Fire Extinguishing Systems — Part 6: General Valves
GB/T 8979 Pure Nitrogen, High - Purity Nitrogen, and Ultra - High - Purity Nitrogen
GB/T 9969 General Rules for Industrial Product Instruction Manuals
GB 25972—2024 Gas Fire Extinguishing Systems and Components
GB 27898.1—2011 Fixed Fire - Protection Water Supply Equipment — Part 1: Fire - Protection Gas - Pressurized Water Supply Equipment
XF 61—2010 General Technical Conditions for Driving and Control Devices of Fixed Fire - Extinguishing Systems
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Fire - Protection Gas - Driven Fixed Water Supply Equipment
A water supply device that, during the fire - protection working state, compresses gas, reduces its pressure, and then injects it into a pressurized water tank to displace the fire - protection storage water in the tank, and provides fire - protection water to the fire - protection water supply network at the rated working pressure within a specified time.
Note: It is usually composed of a pressurized water tank and its accessories, a pressure - maintaining pump set, a pressurizing system, pipeline valves and their accessories, measuring and control instruments, and a control cabinet.
3.2
Gas - Pressurizing System
The general term for components related to the storage, monitoring, pressure reduction, and release of compressed gas in fire - protection gas - driven fixed water supply equipment.
3.3
Concentrated Decompression Fire - Protection Gas - Driven Fixed Water Supply Equipment
Fire - protection gas - driven fixed water supply equipment where the compressed gas from the pressurizing system is converged from the gas cylinder group and then centrally reduced in pressure before being injected into the pressurized water tank.
3.4
Scattered Decompression Fire - Protection Gas - Driven Fixed Water Supply Equipment
Fire - protection gas - driven fixed water supply equipment where the compressed gas from the pressurizing system is reduced in pressure from the gas cylinder group and then converged before being injected into the pressurized water tank.
3.5
Fire - Protection Pressurizing Replacement Water VolumeVd
The maximum fire - protection water volume supplied to the fire - protection water supply network by the fire - protection gas - driven fixed water supply equipment during the fire - protection working state, which is displaced by compressed gas injected into the pressurized water tank.
3.6
Fire - Protection Pressurizing Maximum Working Flow RateQd
The maximum water flow rate that the fire - protection gas - driven fixed water supply equipment can provide under the rated working pressure during the fire - protection working state.
3.7
Stop - Gas Device
A device that prevents compressed gas in the pressurized water tank from leaking into the water supply network and cuts off the connection between the pressurized water tank and the water supply network when the water level in the pressurized water tank reaches the set level.
3.8
Pressurized Water Tank
A pressure vessel that can store water and gas and work according to Boyle's Law, utilizing the characteristic of gas expansion after compression to supply water.
3.9
Fire - Protection Rated Working PressurePX
The set water supply pressure to meet the water demand during the fire - protection state.
3.10
Supplementary Water VolumeV1
The difference in water volume in the pressurized water tank between the upper pressure maintenance limit P4P4 and the lower pressure maintenance limit P3P3.
Note: It is the regulating water volume to avoid frequent start - stop of the pressure - maintaining pump to maintain the pressure stability of the fire - protection water supply network.
3.11
Upper Pressure Maintenance LimitP4
The highest pressure for the fire - protection gas - driven fixed water supply equipment to maintain normal pressure maintenance operation.
Note: It is the pressure in the pressurized water tank when the pressure - maintaining pump set stops.
3.12
Lower Pressure Maintenance LimitP3
The lowest pressure for the fire - protection gas - driven fixed water supply equipment to maintain normal pressure maintenance operation.
Note: It is the pressure in the pressurized water tank when the pressure - maintaining pump set starts.
3.13
Maximum Working Pressure of the Equipment
For the pressurizing system, the equilibrium pressure when the gas container is filled with gas at the maximum charging pressure and placed at the upper limit of the working temperature range.
For the pressurized water tank, the larger value between the nominal maximum output pressure of the pressurizing system's pressure - reducing device and the upper pressure maintenance limit.
3.14
Exhaust Gas Device
A device used to exhaust compressed gas from the pressurized water tank after the equipment stops working.
4 Classification
4.1 Product Classification
