Standard No.:	GB 20031-2024
English Name:	Foam fire extinguishing equipments
Chinese Name:	泡沫灭火设备
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2024-11-28
Implemented on:	2025-6-1
Status:	valid
Superseding:	GB 20031-2005 General technical specifications for foam fire extinguishing systems and components
Target Language:	English
File Format:	PDF
Word Count:	35000 words
Translation Price(USD):	1050.0
Delivery:	via email in 1 business day

GB 20031-2024 Foam fire extinguishing equipment 1 Scope This document defines the terms and definitions of foam fire extinguishing equipment, specifies the model designation, parameter series, requirements, inspection rules, packaging, transportation and storage, and describes the corresponding test methods. This document is applicable to foam fire extinguishing equipment such as foam proportioning equipment, foam generator, foam ejector, unit foam fire extinguishing equipment and related auxiliary device. This document is not applicable to foam-spray extinguishing equipment. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 150.1 Pressure vessels - Part 1: General requirements GB/T 528 Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties GB/T 1690 Rubber, vulcanized or thermoplastic - Determination of the effect of liquids GB/T 3098.1 Mechanical properties of fasteners - Bolts, screws and studs GB/T 3098.2 Mechanical properties of fasteners - Nuts GB/T 3098.3 Mechanical properties of fasteners - Set screws GB 3445 Indoor fire hydrant GB/T 3512 Rubber, vulcanized or thermoplastic - Accelerated aging and heat resistance tests - Air-oven method GB/T 4208 Degrees of protection provided by enclosure (IP code) GB 5135.1-2019 Automatic sprinkler system - Part 1: Sprinklers GB 5135.3 Automatic sprinkler system - Part 3:Water mist nozzles GB 5135.6 Automatic sprinkler system - Part 6: Convention valves GB 5135.11 Automatic sprinkler system - Part 11: Grooved couplings and fittings GB 6245 Fire pump GB 6246 Fire hose GB 8109-2023 Wheeled fire extinguishers GB/T 9124.1 Steel pipe flanges - Part 1: PN designated GB/T 9124.2 Steel pipe flanges - Part 2: Class designated GB/T 9969 General principles for preparation of instructions for use of industrial products GB 12514 (all parts) Fire coupling GB/T 14561-2019 Fire hydrant cabinet GB 15090 Fire hose reel GB 15308 Foam extinguishing agent GB 19156 Fire monitor GB 19157 General specification for remote-controlled fire monitor systems GB 25202 Foam nozzle GB/T 25205 Deluge sprinkler XF 61-2010 General technical specifications of actuating and control devices of fixed extinguishing systems XF 834 Foam-spray extinguishing equipments 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 foam fire extinguishing equipment equipment that thoroughly mixes foam concentrate, water and air to produce foam for extinguishing fire Note: It mainly consists of foam proportioning equipment, foam generator (e.g. low-expansion foam generator, medium-expansion foam generator, high-expansion foam generator, high back pressure foam generator, foam hook branchpipe, foam sprinkler, etc.), foam ejector (e.g. foam monitor, foam nozzle, etc.), unit foam fire extinguishing equipment (e.g. semi-fixed foam fire extinguishing equipment, foam fire hydrant box) and related auxiliary equipment (e.g. foam concentrate storage tank, foam concentrate supply pump, foam fire hydrant, foam solution conveying hose, etc.). 3.2 foam expansion ratio ratio of the volume of foam to that of the foam solution from which it was made 3.3 low-expansion foam fire foam with a foam expansion ratio below 20 3.4 medium-expansion foam fire foam with a foam expansion ratio of 20 to 200 3.5 high-expansion foam fire foam with a foam expansion ratio above 200 3.6 concentration volume fraction of foam concentrate in foam solution 3.7 balanced pressure proportioning equipment proportioning equipment which can automatically control concentration within a certain range of flow pressure and flow, by using a separate foam concentrate supply pump to inject foam concentrate into the pressure stream at a set pressure difference, and then make it get through the balance valve, orifice plate or venturi (or a combination of an orifice plate and a venturi) Note: Its components include proportioning equipment, atmospheric pressure foam concentrate storage tank, foam concentrate supply pump and standby pump, safety valve, balance valve, check valve, control valve, control panel, etc. 3.8 direct injection variable pump output proportioning equipment proportioning equipment with the flow meter and the control unit combined to control the foam concentrate supply pump to inject the foam concentrate into the flow of the system at a set proportion Note: Its components include atmospheric pressure foam concentrate storage tank, proportioning equipment (when applicable), foam concentrate supply pump, flow meter, control panel, control valve, etc. 3.9 coupled water-turbine driven pump proportioning equipment proportioning equipment with blade type or spiral water turbine connected with the foam concentrate supply pump by a coupling, which uses the pressure water supplied by the foam system water supply pump to drive the water turbine, and then injects the foam concentrate with the foam concentrate supply pump into the foam fire fighting water pipe behind the water turbine at a set proportion Note: Its components include water turbine, foam concentrate supply pump, safety valve, solenoid valve (when applicable), control valve, mixing pipe, etc. 3.10 high back pressure foam generator foam generator which introduces air into the compressed foam solution stream for generating low-expansion foam, with a certain pressure (gauge pressure) at the outlet 3.11 foam hook branchpipe foam generator consisting of hook branchpipe and air foam generator Note: The upper part of hook branchpipe has a curved nozzle, which is used to hook the upper edge of oil tank on fire and spray foam into the tank. 3.12 semi-fixed foam fire extinguishing equipment unit foam fire extinguishing equipment which consists of foam nozzle or foam generator, proportioning equipment, fire hose, atmospheric pressure foam concentrate storage tank and wheeled chassis, etc. 3.13 foam fire hydrant box boxlike unit foam fire extinguishing equipment consisting of box, proportioning equipment, foam nozzle, atmospheric pressure foam concentrate storage tank, fire hose reel or fire hose and an indoor fire hydrant, which has the function of water supply and fire extinguishing 4 Model designation Model of foam fire extinguishing equipment consists of class code, product code, feature code, main parameters and customized manufacturer code. Product code, feature code and main parameters are represented by the symbols shown in Table 1, and the customized manufacturer code is optional. The model designation of foam fire extinguishing equipment is as follows. Example 1: PHYM32/4-6 represents a diaphragm type pressure proportioning equipment, with maximum flow rate of 32 L/s, foam concentration storage tank volume of 4 m3, and concentration of 6%. Example 2: PCL4 represents a vertical low-expansion foam generator with rated flow of 4 L/s.

Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Model designation 5 Requirements 5.1 Foam proportioning equipment 5.2 Foam generator 5.3 Foam ejector 5.4 Unit foam fire extinguishing equipment 5.5 Foam concentrate storage tank 5.6 Foam concentrate supply pump 5.7 Foam fire hydrant 5.8 Foam solution conveying hose 6 Test methods 6.1 Test conditions 6.2 Appearance 6.3 Hydraulic strength test 6.4 Hydraulic seal test 6.5 Concentration test 6.6 Working cycle test 6.7 Operation reliability test 6.8 Determination of emission pressure 6.9 Reverse seal test 6.10 Determination of opening pressure of check valve 6.11 Pressure drop test 6.12 Test for work cycle of balance valve 6.13 Switching test of main and standby pumps 6.14 Drop test 6.15 Anti-vacuum test 6.16 Determination of flow coefficient 6.17 Water impact resistance test 6.18 Determination of foam expansion ratio and drainage time 6.19 Sealing element performance test 6.20 Anti-dumping test 6.21 Overspeed test for impeller 6.22 Determination of covering radius of foam sprinkler 6.23 High temperature test 6.24 Ammonia stress corrosion test 6.25 Sulfur dioxide/carbon dioxide corrosion test 6.26 Salt spray corrosion test 6.27 Fire extinguishing test 6.28 Spraying time test 6.29 Motion performance test 6.30 Tensile test 6.31 Accelerated aging test with hot air 6.32 Test for foam concentrate impregnation resistance 6.33 Test for atmospheric pressure foam concentrate storage tank sealing strength 6.34 Test for opening force 6.35 Tensile test 6.36 Test for operation track stability 6.37 Test for oil impregnation resistance 7 Inspection rules 7.1 Inspection classification 7.2 Inspection items 7.3 Sampling method and sample quantity 7.4 Judgment criteria 8 Packaging, transportation and storage 8.1 Packaging 8.2 Transportation 8.3 Storage Annex A (Informative) Parameter series of foam fire extinguishing equipment Annex B (Normative) Test procedures and sample quantity of pressure proportioning equipment B.1 Description for test procedures B.2 Test procedures Annex C (Normative) Test procedures and sample quantity of balanced pressure proportioning equipment C.1 Description for test procedures C.2 Test procedures Annex D (Normative) Test procedures and sample quantity of direct injection variable pump output proportioning equipment D.1 Description for test procedures D.2 Test procedures Annex E (Normative) Test procedures and sample quantity of coupled water-turbine driven pump proportioning equipment E.1 Description for test procedures E.2 Test procedures Annex F (Normative) Test procedures and sample quantity of in-line proportioning equipment F.1 Description for test procedures F.2 Test procedures Annex G (Normative) Test procedures and sample quantity of ring pump proportioning equipment G.1 Description for test procedures G.2 Test procedures Annex H (Normative) Test procedures and sample quantity of low-expansion foam generator H.1 Description for test procedures H.2 Test procedures Annex I (Normative) Test procedures and sample quantity of high back pressure foam generator I.1 Description for test procedures I.2 Test procedures Annex J (Normative) Test procedures and sample quantity of foam hook branchpipe J.1 Description for test procedures J.2 Test procedures Annex K (Normative) Test procedures and sample quantity of medium-expansion foam generator K.1 Description for test procedures K.2 Test procedures Annex L (Normative) Test procedures and sample quantity of high-expansion foam generator L.1 Description for test procedures L.2 Test procedures Annex M (Normative) Test procedures and sample quantity of foam sprinkler M.1 Description for test procedures M.2 Test procedures Annex N (Normative) Test procedures and sample quantity of foam monitor Annex O (Normative) Test procedures and sample quantity of foam nozzle Annex P (Normative) Test procedures and sample quantity of semi-fixed foam fire extinguishing equipment P.1 Description for test procedures P.2 Test procedures Annex Q (Normative) Test procedures and sample quantity of foam fire hydrant box Q.1 Description for test procedures Q.2 Test procedures Annex R (Normative) Test procedures and sample quantity of foam concentrate storage tank R.1 Description for test procedures R.2 Test procedures Annex S (Normative) Test procedures and sample quantity of foam concentrate supply pump Annex T (Normative) Test procedures and sample quantity of foam fire hydrant T.1 Description for test procedures T.2 Test procedures Annex U (Normative) Test procedures and sample quantity of foam solution conveying hoses U.1 Description for test procedures U.2 Test procedures