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1、BRITISH STANDARD BS 715:1993 Incorporating Amendment No. 1 Specification for Metal flue pipes, fittings, terminals and accessories for gas-fired appliances with a rated input not exceeding 60 kW Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:54 GMT+00:00
2、2006, Uncontrolled Copy, (c) BSI BS 715:1993 This British Standard, having been prepared under the direction of the Gas Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 October 1993 BSI 09-1999 First published November 1936 Second editi
3、on November 1951 Third edition October 1962 Fourth edition July 1970 Fifth edition December 1986 Sixth edition November 1989 Seventh edition October 1993 The following BSI references relate to the work on this standard: Committee reference GSE/4 Draft for comment 91/77800 DC ISBN 0 580 22476 7 Commi
4、ttees responsible for this British Standard The preparation of this British Standard was entrusted by the Gas Standards Policy Committee (GSE/-) to Technical Committee GSE/4, upon which the following bodies were represented: British Flue and Chimney Manufacturers Association British Gas plc Decorati
5、ve Gas Fire Manufacturers Association Federation of Master Builders Society of British Gas Industries Amendments issued since publication Amd. No.DateComments 8413March 1995Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:
6、43:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 715:1993 BSI 09-1999i Contents Page Committees responsibleInside front cover Forewordiii Section 1. General 1.1Scope1 1.2Definitions1 Section 2. Single-wall flue system 2.1Materials2 2.2Construction2 2.3Dimensions2 2.4Finish2 2.5Marking3 2.6Instruc
7、tions3 2.7Performance3 Section 3. Double-wall flue system 3.1Materials4 3.2Construction4 3.3Dimensions4 3.4Finish6 3.5Marking6 3.6Instructions6 3.7Performance6 Section 4. Flexible flue liner 4.1Materials8 4.2Construction8 4.3Dimensions8 4.4Finish8 4.5Marking8 4.6Instructions8 4.7Performance8 Section
8、 5. Flue terminal 5.1Materials11 5.2Construction11 5.3Dimensions11 5.4Finish11 5.5Marking11 5.6Instructions12 5.7Performance12 Section 6. Flue box 6.1Flue box for a gas fire which is in accordance with BS 5258-516 6.2Flue box for any decorative fuel effect (DFE), gas appliance (commonly known as a D
9、GF) intended for installation in a fire place recess and in accordance with BS 5258-1219 6.3Flue box for a specific decorative fuel effect gas appliance (commonly known as a DGF) in accordance with BS 5258-1222 6.4Flue box for any inset live fuel effect gas fire not exceeding 7 kW heat input (common
10、ly known as an ILFE) which is in accordance with BS 5258-1624 6.5Flue box for a specific inset live fuel effect gas fire (commonly known as an ILFE) which is in accordance with BS 5258-1626 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:54 GMT+00:00 2006,
11、 Uncontrolled Copy, (c) BSI BS 715:1993 ii BSI 09-1999 Page Section 7. Fittings 7.1Ridge terminal adaptors29 7.2Bends29 7.3Adaptors29 7.4Flue disconnecting devices29 Section 8. Accessories 8.1Materials31 Annex A Tests for coatings other than vitreous enamel33 Figure 1 Sealing of flue pipe for testin
12、g5 Figure 2 Typical crushing test apparatus7 Figure 3 Typical combined clamp and plate arrangement10 Figure 4 A typical ridge terminal adaptor (“R”-type adaptor)12 Figure 5 Strength test equipment13 Figure 6 Apparatus for testing the performance of free-standing terminals under wind conditions14 Fig
13、ure 7 Apparatus for testing the performance of ridge terminals under wind conditions15 Figure 8 Flue gas generator17 Figure 9 Dimensions of a flue box for a gas fire to BS 5258-518 Figure 10 Typical views of a flue box for a decorative fuel effect gas fire (DGF)20 Figure 11 Typical views of a flue b
14、ox for a typical basket decorative fuel effect gas fire25 Figure 12 Adaptors30 Figure 13 A typical wall bracket used to support long pipe runs31 Figure 14 A typical combined support assembly and firestop plate31 Figure 15 A typical two-piece firestop plate32 Figure 16 A typical firestop spacer plate
15、32 Figure 17 Paint scratch test apparatus34 Table 1 Dimensions of straight pipes, bends and fittings for single-wall flue systems2 Table 2 Materials for flue terminals11 Table 3 Flue flow rates and values of the constant C13 Table 4 Materials for ridge terminal adaptors29 Table 5 Dimensions of adapt
16、ors30 Table 6 Oven temperature33 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 715:1993 BSI 09-1999iii Foreword This British Standard has been prepared under the directi
17、on of the Gas Standards Policy Committee and supersedes BS 715:1989 which is withdrawn. This edition introduces technical changes to bring the standard up to date but it does not reflect a full review of the standard, which will be undertaken in due course. However, it includes alterations introduce
18、d by Amendment No. 1 to BS 715:1989 published in September 1990 and Amendment No. 2 to BS 715:1989 published in July 1991 and further technical changes to section 6 which has been completely revised. Recommendations on the choice and installation of flues and terminals are contained in BS 5440-1. BS
19、 1289 is complementary to this standard particularly with respect to the performance requirements of terminals. 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 Briti
20、sh Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 34, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments i
21、ncorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank Univ
22、ersity, Fri Dec 08 14:43:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 715:1993 BSI 09-19991 Section 1. General 1.1 Scope This British Standard specifics the dimensional, material and performance requirements for metal flue pipes and fittings, and the material requirements for accessories for gas
23、-fired appliances with up to 60 kW rated input and includes the specification for flue boxes to enable gas fire flues to be installed against or within a wall which does not have a fireplace or flue. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover.
24、 1.2 Definitions For the purposes of this British Standard the definitions given in BS 1179:1967 and BS 1179-6 apply together with the following. 1.2.1 accessory any component, other than a flue gas carrying component, that is necessary for the installation of a metal flue pipe system, e.g. a bracke
25、t 1.2.2 adaptor a fitting in the form of a socket piece for joining flue pipes and fittings of different materials, e.g. sheet metal pipes to asbestos cement pipes 1.2.3 adjustable bend a bend that, is made in sealed rotatable segments each of which can be swivelled to provide adjustment for a desig
26、nated angle 1.2.4 ceiling plate an accessory used to face a hole in the ceiling and through which a sheet metal flue pipe and adaptor enters. It may be provided with a protecting sleeve 1.2.5 end cap a component to close the ends of the annuals of a double wall section or bend to retain the air gap.
27、 It may also provide the means of coupling double-walled sections together 1.2.6 fitting any flue gas carrying component other than a straight pipe of uniform bore, e.g. a bend 1.2.7 firestop a barrier or seal of non-combustible material that is designed to prevent or retard the passage of smoke or
28、flames around a chimney section where it passes through a wall, floor or ceiling 1.2.8 firestop and spacer a firestop that also locates the chimney where it passes through any part, of the building structure 1.2.9 free-standing terminal a terminal, other than a ridge terminal, designed for fitting d
29、irectly to the outlet of an open flue system 1.2.10 flue disconnecting device a fitting used in a flue system to enable connection and disconnection to be made of either the appliance or part of or all of the flue 1.2.11 flue box a device that provides a substitute open fire place to which a gas fir
30、e and flue may be installed 1.2.12 joint cover clip an accessory for covering a joint between pipes, or pipes and fittings, where a connecting piece is used 1.2.13 protecting sleeve An accessary for providing a gap between the flue pipe and the ceiling, wood work or adjacent combustible materials 1.
31、2.14 ridge terminal a terminal designed for fitting at the ridge of a building 1.2.15 ridge terminal adaptor (“R”-type adaptor) a fitting for connecting circular cross section pipe to the rectangular-section connection of a ridge flue terminal 1.2.16 supporting bracket an accessory for holding a pip
32、e or fitting at a predetermined distance from a structure 1.2.17 wall plate an accessory used to face a hole in the wall and through which a sheet metal flue pipe and adaptor enters 1.2.18 size designation a numerical designation of the size of a unit which is a convenient round number approximately
33、 equal to the manufacturing dimension 1.2.19 declared internal diameter the internal diameter of the inner pipe as declared by the manufacturer Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 715:1993 2 BSI
34、09-1999 Section 2. Single-wall flue system 2.1 Materials 2.1.1 General All pipes, fittings and accessories shall be manufactured from materials which in combination will not cause bimetallic corrosion and hence adversely affect the integrity of the flue system. 2.1.2 Sheet metal 2.1.2.1 The sheet me
35、tal shall be of steel or aluminium conforming to 2.1.2.2 to 2.1.2.4 and shall be smooth and free from surface or other defects. Prior to the application of any protective coating the sheet metal shall be of a thickness of not less than 0.70 mm for steel and 1.00 mm for aluminium. 2.1.2.2 Steel sheet
36、 shall be of one of the grades specified in BS 1449-1. 2.1.2.3 Stainless steel sheet shall be of one of the following grades as specified in BS 1449-2. 2.1.2.4 Sheet aluminium shall be aluminium 1 200 of hardness not less than condition H2 in accordance with BS 1470. 2.2 Construction 2.2.1 Seams sha
37、ll be mechanically strong and sound when tested in accordance with 2.7. They may be either folded, or riveted, or welded, except for vitreous enamelled components which shall have welded seams. 2.2.2 Continuously welded seams shall not form internal or external projections that will detract from the
38、 appearance of the finished article, cause difficulty in joining pipes and fittings, or give rise to corrosion. 2.2.3 Where spot welding is used, the weld spots shall be at not more than 15 mm centres on a curved surface and not more than 20 mm centres on a flat surface. 2.2.4 Folded seams shall be
39、sunk at a spigot end and raised at a socket end. 2.3 Dimensions The dimensions of straight pipes, bends and fittings shall be as given in Table 1, except that for vitreous enamelled pipes, bends and fittings the tolerances given in Table 1 do not apply. Bends shall have a minimum angle of 90 and a m
40、aximum of 135. The length of the plain parallel portions of bends shall be not less than that given in column 5 of Table 1. NOTELengths of pipes are not specified in this standard. 2.4 Finish 2.4.1 General All pipes, fittings and accessories shall be protected against corrosion. 2.4.2 Vitreous ename
41、lled finishes Vitreous enamelled components shall be completely coated internally and externally. The coating shall be homogeneous and uniform in colour. All edges shall be adequately covered to minimize the possibility of subsequent corrosion. There shall not be an excess of enamel at the ends whic
42、h might detract from the accuracy of the diameter. Table 1 Dimensions of straight pipes, bends and fittings for single-wall flue systems 304S16316S11317S16320S31 315S16316S13317S12320S33 316S31 316S33 12345 Nominal sizePipes and fittings without sockets and spigots Pipes and fittings with sockets an
43、d spigotsBends Internal diameter External diameter at spigot end Internal diameter at socket end Length of plain parallel portions (tolerance)(tolerance)(tolerance) mmmmmmmm 50 75 100 125 150 175 200 50 75 101 126 152 177 202 51 76 102 127 153 178 204 51 76 102 127 153 178 204 38 38 50 50 50 50 50 +
44、1 0 mm +0 1 mm +1 0 mm Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 715:1993 BSI 09-19993 The vitreous enamel finish shall conform to BS 3831, where applicable, and shall be such that the internal surface
45、 is of minimum standard class A when tested as described in BS 1344-3. 2.4.3 Quality The ends of all parts shall be smoothly finished, free from burrs, and square to their respective axis. 2.4.4 Coating performance Coatings, other than vitreous enamel coatings, shall conform to Annex A when tested a
46、s described therein. 2.5 Marking Each pipe, fitting, terminal and accessory shall be permanently and legibly marked with the following information. a) The number and date of this British Standard, i.e. BS 715:19931). b) The name or distinguishing mark of the manufacturer. c) The direction of flow (i
47、f relevant). 2.6 Instructions The manufacturer shall make available the following information: a) full installation instructions; b) a list of all flue pipes, fittings, terminals and accessories necessary for installation of the complete system. 2.7 Performance 2.7.1 Requirement The measured leakage
48、 rate of air from the assembled flue pipe when tested by the method given in 2.7.2 shall not exceed 1.0 m3/h per metre length. 2.7.2 Method Assemble two or more lengths of flue pipe to provide a nominal length of 3 m and effect an airtight seal at both flue pipe inlet and outlet. The sealing “plugs”
49、 should incorporate tapped holes for connection into an air supply. Connect a means of delivering air at a pressure of 25 N/m2 and an air flow meter in series to the sealed flue pipe, and make a separate connection from the sealed flue space to a suitable manometer, making both of these connections directly by airtight hose and fittings. Deliver into the flue pipe at such a rate that the manometer records a steady internal pressure of 25 N/m2. Obtain the leakage rate of air from the flue pipe by measuring the rate of air flow