BS 5306-5 1-1992 Code of practice for fire extinguishing installations and equipment on premises - Halon systems - Specification for halon 1301 total flooding systems《房屋灭火装置及设备惯例 第.pdf

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1、BRITISH STANDARD BS5306-5.1: 1992 Incorporating Amendment No.1 Fire extinguishing installations and equipment on premises Part 5: Halon systems Section 5.1 Specification for halon 1301 total flooding systemsBS5306-5.1:1992 This British Standard, having been prepared under the directionof the Fire St

2、andards Policy Committee, was publishedunder the authority ofthe Standards Board and comesinto effect on 15July1992 BSI 04-1999 The following BSI references relate to the work on this standard: Committee reference FSM/18 Draft for comment 90/45836 DC ISBN0580206521 Committees responsible for this Br

3、itish Standard The preparation of this British Standard was entrusted by the Fire Standards Policy Committee (FSM/-) to Technical Committee FSM/18, upon which the following bodies were represented: British Automatic Sprinkler Association British Fire Protection Systems Association Ltd. British Fire

4、Services Association British Nuclear Fuels plc Chartered Institution of Building Services Engineers Chemical Industries Association Chief and Assistant Chief Fire Officers Association Convention of Scottish Local Authorities Department of Health Department of the Environment (Building Research Estab

5、lishment) Department of the Environment Central (DCSS Fire Branch) Department of Transport Marine Directorate Electricity Association Fire Brigades Union Fire Extinguishing Trades Association Health and Safety Executive Hevac Association Home Office Incorporated Association of Architects and Surveyo

6、rs Institute of Petroleum Institution of Fire Engineers Lloyds Syndicates Survey Department London Fire and Civil Defence Authority Loss Prevention Council Ministry of Defence National Association of Fire Officers Royal Institute of British Architects Society of Fire Protection Engineers Society of

7、Motor Manufacturers and Traders Limited United Kingdom Atomic Energy Authority Warrington Fire Research Centre The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Engineering Equipment and Materials Users Association Amendments issued since p

8、ublication Amd. No. Date Comments 8248 March1995 Indicated by a sideline in the marginBS5306-5.1:1992 BSI 04-1999 i Contents Page Committees responsible Inside front cover Foreword iii Section 1. General 0 Introduction 1 1 Scope 1 2 Definitions 1 3 Characteristics and uses of halon1301 3 4 Types of

9、system 6 5 Planning 6 Section 2. Contract arrangements 6 Contract drawings and information documents 7 7 Commissioning and acceptance 7 Section 3. Restoration after use, inspection, testing and maintenance 8 Restoration after use 9 9 Inspection, testing and maintenance 9 Section 4. System design 10

10、Basis of system design 11 11 Design concentration 11 12 Predicted minimum hold time 12 13 Quantity of halon 13 14 Design discharge time 15 15 System operation 15 16 Enclosure 18 17 System components 18 18 Pipework 20 19 Installation of pipework 25 20 Pipework design 27 21 Safety 49 Appendix A Fan te

11、st for determination of predicted minimum holdtimeofanenclosure 55 Appendix B Treatment of enclosures with predicted minimum holdtimeslessthan the recommended value 60 Appendix C Example of fan test procedure, calculation and assessmentinaccordance with Appendix A and Appendix B 61 Appendix D Determ

12、ination of halon 1301 extinguishing and inertingconcentrations 65 Appendix E Marine applications 68 Figure 1 Pressure/temperature relationship for halon 1301 containersin42bar systems 21 Figure 2 Pressure/temperature relationship for halon 1301 containersin25bar systems 22 Figure 3 Halon density in

13、pipelines for 42 bar systems 30 Figure 4 Halon density in pipelines for 25 bar systems 31 Figure 5 Maximum pipe size to maintain turbulent flow 32 Figure 6 Flow splitting arrangements 33 Figure 7 Mid-discharge storage pressure versus percentage ofhalontofillpipeline 34 Figure 8 Typical balanced syst

14、em 36 Figure 9 Typical unbalanced system 38BS5306-5.1:1992 ii BSI 04-1999 Page Figure 10 Pressure drop at 20C in steel pipe (inch sizes) 39 Figure 11 Pressure drop at 20C in steel pipe (metric sizes) 40 Figure 12 Pressure drop multiplication factor for 42 bar systems 41 Figure 13 Pressure drop multi

15、plication factor for 25 bar systems 42 Figure 14 Label to be displayed at manual control 51 Figure 15 Labels to be displayed at entrances to hazards 52 Figure 16 Example sketch plan for fan test 63 Figure 17 Cup burner apparatus 67 Table 1 Physical properties of halon 1301 3 Table 2 Specification fo

16、r halon 1301 4 Table 3 Halon 1301 extinguishing and minimum design concentrationsinairat 1.013 bar (absolute) 12 Table 4 Halon 1301 inerting and minimum design concentrationsinairat1.013 bar (absolute) 13 Table 5 Correction factor for halon quantity in systems not at sea-level 14 Table 6 Specific vo

17、lumes and flooding quantities at variousconcentrationsofhalon 1301 at different temperatures at1.013bar(absolute) 16 Table 7 Steel pipework 23 Table 8 Maximum distance between pipework supports 26 Table 9 Equivalent lengths of common pipe fittings and valves 28 Table 10 Constants to determine percen

18、tage of halon in piping 35 Table 11 A and B factors for steel pipe (inch sizes) 36 Table 12 A and B factors for steel pipe (metric sizes) 37 Table 13 Y and Z factors for 42 bar systems at a filling density of1000kg/m 3 to1121 kg/m 3 43 Table 14 Y and Z factors for 42 bar systems at a filling density

19、 of850 kg/m 3to999 kg/m 3 44 Table 15 Y and Z factors for 42 bar systems at a filling density of700 kg/m 3to849 kg/m 3 45 Table 16 Y and Z factors for 42 bar systems at a filling density of600 kg/m 3to 699 kg/m 3 46 Table 17 Y and Z factors for 25 bar systems at a filling density of1000 kg/m 3to 112

20、1 kg/m 3 47 Table 18 Y and Z factors for 25 bar systems at a filling density of850 kg/m 3to 999 kg/m 3 47 Table 19 Y and Z factors for 25 bar systems at a filling density of700 kg/m 3to 849 kg/m 3 48 Table 20 Y and Z factors for 25 bar systems at a filling density of600 kg/m 3to 699 kg/m 3 48 Table

21、21 Safety clearances to enable operation, inspection, cleaning, repairs,painting and normal maintenance work to be carried out 54 Table 22 Example results of average leakage characteristics 64 Publications referred to Inside back coverBS5306-5.1:1992 BSI 04-1999 iii Foreword This Part of BS5306 has

22、been prepared under the direction of the Fire Standards Policy Committee and supersedes BS5306-5.1:1982 which is withdrawn. BS5306 comprises the following Parts and Sections: Part 0: Guide for the selection of installed systems and other fire equipment; Part 1: Hydrant systems, hose reels and foam i

23、nlets; Part 2: Specification for sprinkler systems; Part 3: Code of practice for selection, installation and maintenance of portable fire extinguishers; Part 4: Specification for carbon dioxide systems; Part 5: Halon systems; Section 5.2: Halon 1211 total flooding systems; Part 6: Foam systems; Sect

24、ion 6.1: Specification for low expansion foam systems; Section 6.2: Specification for medium and high expansion foam systems; Part 7: Specification for powder systems. Halon systems are designed to provide a piped supply of gaseous extinguishing medium for the extinction of fire. Several different m

25、ethods of piping supplies of halon to, and applying it at, the required points of discharge for fire extinction have been developed in recent years, and there is a need for dissemination of information on established systems and methods. This Section of BS5306 has been prepared to meet this need. Ad

26、vice is given on the selection of the system most suited to a particular need, on suitable methods of operation and on the part these systems may play in general schemes of fire protection on premises. Requirements and recommendations are given on the design, maintenance and efficient operation of s

27、ystems. In particular, new requirements and recommendations to eliminate the need to release halon 1301 during testing and commissioning procedures have been included. These are linked to the inclusion of the new fan test method given in Appendix A. The requirements and recommendations of this Secti

28、on of BS5306 are made in the light of the best technical data known to the committee at the time of writing, but since a wide field is covered it has been impracticable to consider every possible factor or circumstance that might affect implementation of the recommendations. It has been assumed in t

29、he preparation of this standard that the execution of its provisions is entrusted to people appropriately qualified and experienced in the specification, design, installation, testing, approval, inspection, operation and maintenance of halon systems and equipment, for whose guidance it has been prep

30、ared, and who can be expected to exercise a duty of care to avoid unnecessary release of halon1301. Attention is drawn to the Montreal Protocol on Substances that deplete the ozone layer. Product certification. Users of this British Standard are advised to consider the desirability of independent ce

31、rtification of product conformity with this British Standard based on testing and continuing surveillance, which may be coupled with assessment of a suppliers quality systems against the appropriate Part of BS5750. NOTEThis standard has been written in the form of a practice specification (see claus

32、e6 of PD6501-1:1982). To comply with this specification, the user has to comply with all its requirements. He may depart from recommendations, but this would be on his own responsibility and he would be expected to have good reasons for doing so.BS5306-5.1:1992 iv BSI 04-1999 A British Standard does

33、 not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. In particular, attention is drawn to the Pressure Systems and Tr

34、ansportable Gas Containers Regulations1981S11981 No.2169. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages1to68, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. Thi

35、s will be indicated in the amendment table on theinside front cover.BS5306-5.1:1992 BSI 04-1999 1 Section 1. General 0 Introduction It is important that the fire protection of a building or other construction work should be considered as a whole. Halon 1301 total flooding systems form only a part, t

36、hough an important part of the available facilities, but it should not be assumed that their adoption necessarily removes the need to consider supplementary measures, such as the provision of portable fire extinguishers or other mobile appliances for first aid or emergency use, or to deal with speci

37、al hazards. Halon1301 has for many years been a recognized effective medium for the extinction of flammable liquid fires and fires in the presence of electrical risks, but it should not be forgotten, in the planning of the comprehensive schemes, that there may be hazards for which this medium is not

38、 suitable or that in certain circumstances or situations there may be dangers in its use, requiring special precautions. Halon1301 total flooding systems convey halon1301 from storage containers for the protection of a particular part or parts of the building or other construction work against fire.

39、 The systems may be piped or otherwise connected, and may use containers at a central location, or dispersed at several locations in the protected area. Advice on these matters can be obtained from the appropriate fire authority or other enforcing authority under the Health and Safety at Worketc. Ac

40、t 1974, and from the insurers. In addition, reference should be made as necessary to other Parts of this standard. It is essential that the fire extinguishing equipment should be carefully maintained to ensure instant readiness when required. This routine is liable to be overlooked or given insuffic

41、ient attention by supervisors. It is, however, neglected at peril to the lives of occupants of the premises and at the risk of crippling financial loss. The importance of maintenance cannot be too highly emphasized. 1 Scope This Section of BS5306 specifies requirements and gives recommendations for

42、the design, installation, testing, maintenance and safety of halon1301 total flooding fire extinguishing systems in building or plant, and the characteristics of halon1301 and the types of fire for which it is a suitable extinguishing medium. This standard covers only systems operating at25 bar or42

43、 bar (at20C) with nitrogen propellant; design data for other pressures and propellants are not available at this time. This standard does not cover explosion suppression systems, systems in which halon is discharged to inert a flammable or explosive gas mixture, or small fixed fire extinguishers whi

44、ch are covered by BS7327-1. This Section of BS5306 covers halon1301 systems for use in buildings and other construction works. The systems are also widely used on ships and in aircraft, and while its requirements may apply in general for such applications, additional requirements may be necessary. S

45、ome information on marine applications is given in Appendix E. NOTE 1Unless otherwise specified in this standard all pressures are gauge pressures expressed in bars. 1 bar = 10 5 N/m 2 = 10 2kPa NOTE 2The titles of the publications referred to in this standard are listed on inside back cover. 2 Defi

46、nitions For the purposes of this Section of BS5306, the definitions given in BS4422-4 apply, together with the following. 2.1 achievable maximum concentration concentration (as a percentage by volume) which would be produced in the net volume of the protected enclosure, by the uniform distribution o

47、f the halon, including any for extended discharge, discharged by the system 2.2 authority organization, office or individual responsible for approving equipment, installations or proceduresBS5306-5.1:1992 2 BSI 04-1999 2.3 automatic system fire extinguishing system that, under specified conditions,

48、functions without intervention by a human operator 2.4 design concentration concentration (as a percentage by volume) which would be produced in the gross volume of the protected enclosure by the uniform distribution of the halon, excluding any for extended discharge, discharged by the system 2.5 ex

49、tinguishing concentration minimum concentration (as a percentage by volume) of halon1301 necessary to extinguish a flame of a particular fuel under defined experimental conditions 2.6 flooding quantity mass of halon per unit volume of an enclosure 2.7 gross volume of a protected enclosure volume enclosed by the building elements around the protected enclosure, less the volume of any permanent impermeable building elements within the enclosure 2.8 hold time rec