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1、BRITISH STANDARD BS 5440-1: 1990 Incorporating Amendment No. 1 Installation of flues and ventilation for gas appliances of rated input not exceeding 60 kW (1st, 2nd and 3rd family gases) Part 1: Specification for installation of flues Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:11:30 G
2、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5440-1:1990 This British Standard, having been prepared under the direction of the Gas Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 28 February 1990 BSI 11-1998 First published August 1978 Firs
3、t revision February 1990 The following BSI references relate to the work on this standard: Committee reference GSE/30 Draft for comment 85/79058 DC ISBN 0 580 18142 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Gas Standards Policy C
4、ommittee (GSE/-) to Technical Committee GSE/30, upon which the following bodies were represented: British Flue and Chimney Manufacturers Association British Gas plc Confederation for the Registration of Gas Installers Consumer Standards Advisory Committee of BSI Department of the Environment Departm
5、ent of Trade and Industry (Consumer Safety Unit, CA Division) Health and Safety Executive Institute of Domestic Heating and Environmental Engineers Institution of Gas Engineers Liquefied Petroleum Gas Industry Technical Association (UK) Society of British Gas Industries Trades Union Congress Coopted
6、 members Amendments issued since publication Amd. No.Date of issueComments 8819September 1995 Indicated by a side line in the margin Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:11:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5440-1:1990 BSI 11-1998i Contents Page Committees respons
7、ibleInside front cover Forewordiii 1Scope1 2Definitions1 3Preliminary design considerations3 3.1Types of flue system3 3.2Flue termination4 3.3Fire precautions5 4Individual open flue: natural draught5 4.1Design5 4.2Installation16 4.3Commissioning19 5Individual open flue: fanned draught20 5.1Design20
8、5.2Installation21 5.3Commissioning21 6Shared open flue: natural draught21 6.1Design21 6.2Installation22 7Balanced flue: natural draught22 7.1General22 7.2Installation22 7.3Post installation check25 8Balanced flue: fanned draught25 8.1General25 8.2Installation25 8.3Post installation check26 9Shared r
9、oom-sealed: natural draught26 9.1Design26 9.2Sizing27 9.3Terminal design and location27 9.4Inspection27 9.5Appliance selection and installation27 9.6Commissioning29 10Special categories of flue system29 10.1Flue systems for use with condensing appliances29 10.2Closed flue systems30 10.3Balanced comp
10、artment31 10.4Shared open flue fanned draught systems32 10.5Other categories of flue system32 Appendix A Calculation method for flue sizing34 Appendix B Flue terminal positions37 Appendix C Balanced flue installation in properties of timber framed construction38 Figure 1 Flue systems4 Figure 2 Flat
11、roof, with parapet7 Figure 3 Flat roof, envelope method8 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:11:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5440-1:1990 ii BSI 11-1998 Page Figure 4 Flat roof, where the flue outlet is more than 10 heights (h) away from all structures8 Figur
12、e 5 Flat roof, with flue close to parapet8 Figure 6 Flat roof, with no parapet9 Figure 7 Flat roof, with structure close to flue outlet9 Figure 8 Pitched roof, not greater than 459 Figure 9 Pitched roof, within 1.5 m of a structure on roof10 Figure 10 Pitched roof, exceeding 4510 Figure 11 Pitch roo
13、f, internal route, pitch not exceeding 45 and ridge termination11 Figure 12 Pitch roof, chimney within 1.5 m from dormer window measured horizontally11 Figure 13 Maximum lengths for condensate-free flues for appliances other than gas fires12 Figure 14 Connections to existing brick chimney13 Figure 1
14、5 Typical methods of sealing flue liner15 Figure 16 Sealing of false chimney areas18 Figure 17 Shared flue systems and flue block types23 Figure 18 Shielding of plastics gutters24 Figure 19 Shared room-sealed systems28 Figure 20 Balanced compartment installation33 Figure 21 Worked example 136 Figure
15、 22 Worked example 236 Figure 23 Flue terminal positions37 Figure 24 Circular balanced flue fitted to timber framed structure38 Figure 25 Rectangular balanced flue fitted to timber framed structure39 Table 1 Location of roof mounted terminals for individual natural draught open flue systems (minimum
16、 height of base of terminal)7 Table 2 Condensate-free lengths of individual open flue used with a gas fire14 Table 3 Appliance/chimney combinations which require the chimney to be lined14 Table 4 Voids below appliance connections16 Table 5 Minimum flow rates for fanned flues21 Table 6 Appliances dis
17、charging by way of subsidiary flues into a main flue22 Table 7 Normal Se-duct block sizes27 Table 8 Se-duct sizes for continuously burning appliances in flats29 Table 9 Se-duct sizes for combinations of instantaneous water heaters (30 kW input rating) and continuously burning appliances in flats29 T
18、able 10 Balanced compartment air inlet duct sizing31 Table 11 Resistance factors for use in calculating equivalent heights34 Table 12 Inlet and outlet resistances34 Table 13 Minimum equivalent heights needed35 Table 14 Minimum dimensions of flue terminal positions (all types)37 Publications referred
19、 toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:11:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5440-1:1990 BSI 11-1998 iii Foreword This Part of BS 5440 has been prepared under the direction of the Gas Standards Policy Committee. It is a revision of BS 5440-1:1978
20、 which is withdrawn. This revision has been undertaken because of the need to: a) cover recent developments in appliance design, flue material and practical experience in the disposal of products of combustion by means of flues; b) refine and improve the method of sizing an individual open flue acco
21、rding to its route and height; c) expand on the recommendations for siting terminals and to prohibit the use of wall terminals with open flue natural draught systems; d) describe in further detail means of safeguarding against blockage of appliance flue connections in brick chimneys; e) continue to
22、emphasize the use of room-sealed systems where practicable. The various flue systems are grouped in either open, closed or room-sealed forms and classified by whether they are natural or fanned draught types. NOTEThis standard has been written in the form of a practice specification (see clause 6 of
23、 PD 6501-1:1982). To comply with this specification, the user has to comply with all its requirements. He may depart from recommendations, but this would be his own responsibility and he would be expected to have good reasons for doing so. It is essential that the appropriate specifications/codes of
24、 practice are consulted on all aspects of appliance and flue installation. A British Standard does 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
25、 immunity from legal obligations. In particular, attention is drawn to the following. a) Statutory Instrument 1358:1984: The Gas Safety (Installation and Use) Regulations 1984. b) Statutory Instrument 1065:1985 (as amended): Building Regulations 1985. c) Statutory Instrument 1596:1981 (as amended):
26、The Building Standards (Scotland) Regulations 1981. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 40, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This w
27、ill be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:11:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:11:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5440-1:
28、1990 BSI 11-19981 1 Scope This Part of BS 5440 specifies the design and installation requirements for flue systems which form part of a new or replacement appliance installation for domestic or commercial purposes. It specifies natural and fanned draught flues for appliances which comply with the ap
29、propriate British Standard specification, utilize 1st, 2nd or 3rd family gases and have rated heat inputs not exceeding 60 kW. This standard deals with the complete flue equipment from the appliance connection to the discharge to outside air. It also covers flues that were intended originally for ap
30、pliances burning other fuels but which are subsequently used for gas appliances. NOTE 1For information on flues for appliances having rated inputs exceeding 60 kW, reference should be made to BS 6644. NOTE 2The installation of additional efficiency-enhancing equipment into the flue system is exclude
31、d from this standard. NOTE 3For specific information on incinerators see BS 3813-1. NOTE 4The titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS 5440 the definitions given in BS 1179:1967 and BS 1179-6 apply,
32、 together with the following. 2.1 balanced-flued appliance a room-sealed appliance which draws its combustion air from a point adjacent to the point at which the combustion products are discharged, the inlet and outlet being so disposed that wind effects are substantially balanced 2.2 branched flue
33、system a shared open flue system serving appliances situated on two or more floors 2.3 builders opening a space formed in a wall or chimney breast into which an appliance may be placed and from which a flue leads NOTEThis is sometimes called a fireplace recess. 2.4 chimney a structure enclosing a fl
34、ue or flues 2.5 chimney liner a rigid or flexible pipe inserted in a chimney to form a flue 2.6 closed flue system a flue system that is closed to a room or internal space due to the absence of a draught diverter, flue break and any draught break on the appliance 2.7 common flue system a shared open
35、 flue system serving two or more appliances installed in the same room or space 2.8 condensate drain a fixture in a flue or appliance (resistant to corrosion from condensate formed from the products of combustion), where condensate can be drained 2.9 condensate pipe a pipe, which may also be part of
36、 the flue pipe (resistant to corrosion from condensate formed from the products of combustion), which is leak free, and along which condensate may flow 2.10 condensing appliance an appliance designed to make use of the latent heat from the water vapour in the combustion products by condensing the wa
37、ter vapour within the appliance 2.11 core a device to be inserted into, and drawn through, a flue for the purpose of clearing surplus jointing material and any other debris and ascertaining whether the flue is clear 2.12 decorative fuel effect gas appliance an open-flued appliance designed to simula
38、te a solid fuel open fire primarily for decorative purposes and intended to be installed so that the products of combustion pass unrestricted from the firebed to the flue 2.13 draught break an opening into any part of an open flue system, including that part integral with the appliance 2.14 draught
39、diverter a device for preventing conditions in a secondary flue from interfering with the combustion performance of an appliance Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:11:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5440-1:1990 2 BSI 11-1998 2.15 drip collar a device fitted on
40、 or around a sloping pipe or duct, designed to direct the flow of moisture to a particular course 2.16 fan-diluted flue system a fanned draught open flue system in which the products of combustion are diluted with air to an agreed low concentration 2.17 fanned draught flue system a flue system in wh
41、ich the removal of flue products is dependent on the fan 2.18 fire stop a barrier or seal of non-combustible material which is designed to prevent or retard the passage of smoke or flames 2.19 flue a passage for conveying combustion products to the outside air 2.20 flue break an opening into a secon
42、dary flue in the same room as, and in addition to, the opening at the draught diverter 2.21 flue pipe a pipe enclosing a flue; for a double-walled type it is the inner pipe 2.22 flue system a complete assembly of flue components from one or more appliances to a single terminal including primary flue
43、(s) and draught diverter(s), if any 2.23 independent flue system a flue system that is not built into the structure of a building but may be supported by attachment thereto 2.24 individual flue system a flue system serving one appliance only 2.25 main flue that part of a shared open flue system carr
44、ying products of combustion from two or more appliances 2.26 natural draught flue system a flue system in which the draught is provided by the thermal force arising from the heat of the products of combustion 2.27 open flue system a flue system that is open to a room or internal space at each applia
45、nce position 2.28 open-flued appliance an appliance designed to be connected to an open flue system, its combustion air being drawn from the room or internal space in which it is installed 2.29 pluming a visible cloud formed when products of combustion exit from a flue and are cooled below the dew p
46、oint by mixing with external air 2.30 precast chimney block a factory-made block chimney system which can be either free standing or built into a wall 2.31 precast flue block a block, incorporating a preformed section of flue, that can be built into a wall with other flue blocks to form a chimney 2.
47、32 room-sealed appliance an appliance that, when in operation, has the combustion system including the air inlet and the products outlet, isolated from the room or space in which the appliance is installed 2.33 secondary flue that part of an open flue system connecting a draught diverter or draught
48、break to the terminal 2.34 secondary flue height the vertical distance between two horizontal planes passing respectively through the top of the draught diverter, or in the case of a gas fire the spigot, and the base of the terminal 2.35 secondary flue length the distance along the central line of t
49、he flue between two horizontal planes passing respectively through the top of the draught diverter, or in the case of a gas fire the spigot, and the base of the terminal Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:11:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5440-1:1990 BSI 11-19983 2.36 Se-duct a duct rising vertically through a building, open at its extremities, and serving to bring combustion air to, and to take products to the outside air from, room-sealed appliances 2.37
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