1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Specification for domestic gas meter boxes and meter bracketBS 8499:2009BS 8499:2009 BRITISH STANDARDPublishing a
2、nd copyright informationThe BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2009 ISBN 978 0 580 58184 7ICS 91.140.40The following BSI references relate to the work on this standard: Committee reference GSE/25 Draft for comment 09/30160438 DCPublicatio
3、n historyFirst published July 2009Amendments issued since publicationDate Text affected BRITISH STANDARD BSI 2009 iBS 8499:2009ContentsForeword iiiIntroduction 11 Scope 12 Normative references 13 Terms and definitions 34 Dimensions and features 55 Meter bracket (supplied separately) 156 Spigot 157 M
4、aterials 168 Finish 169 Marking 1710 Notices and labels 1711 Type testing and performance requirements 22AnnexesAnnex A (normative) Meter box key 25Annex B (normative) Meter bracket 26Annex C (normative) Polyester moulding compound production testing 33Annex D (normative) Selection of meter box samp
5、les and test plaques for testing 34Annex E (informative) General instructions labels 35Annex F (normative) Methods of test for hinge strength 40Annex G (normative) Method of test for door flatness (built-in and surface mounted boxes) 42Annex H (normative) Cutting plans for meter box test samples 43B
6、ibliography 53List of figuresFigure 1 Typical meter box adaptor with ECV and cap 7Figure 2 Built-in box dimensions and features 8Figure 3 Surface mounted box dimensions and features 10Figure 4 Recommended dimensions and features for new semi-concealed box designs 12Figure 5 Universal box dimensions
7、and features 14Figure 6 Spigot dimensions 15Figure 7 Typical emergency notice 19Figure 8 Typical combined emergency notice 19Figure 9 Spigot knockout warning label (built-in boxes) 20Figure 10 Medium pressure service warning label 21Figure 11 Typical manufacturers label 22Figure A.1 Meter box key 25
8、Figure B.1 Meter bracket dimensions 28Figure B.2 Meter bracket shear bolt dimensions 29Figure B.3 Meter bracket security washer dimensions 30Figure B.4 Location points for measurement of thickness of zinc coatings on meter brackets 31Figure D.1 Basic cutting plan 34Figure E.1 Built-in box general in
9、structions (typical) 36Figure E.2 Surface mounted box general instructions (typical) 37Figure E.3 Semi-concealed box general instructions (typical) 38Figure E.4 Universal box general instructions (typical) 39Figure F.1 Built-in and surface mounted hinge strength test 40Figure F.2 Typical apparatus f
10、or semi-concealed and universal box hinge strength test 41BS 8499:2009ii BSI 2009BRITISH STANDARDFigure H.1 Locations of built-in box body cutting plan 43Figure H.2 Location of built-in box door cutting plan 46Figure H.3 Location of surface mounted box cover cutting plan 47Figure H.4 Location of sur
11、face mounted box back panel cutting plan 48Figure H.5 Location of surface mounted box door cutting plan 49Figure H.6 Location of semi-concealed box body cutting plan 50Figure H.7 Location of semi-concealed box lid cutting plan 51Figure H.8 Location of semi-concealed box extension cutting plan 52List
12、 of tablesTable 1 Flexural properties of box samples 22Table 2 Charpy impact strength of box samples 23Table 3 Hinge strength 23Table C.1 Flexural properties of test plaques 33Table C.2 Charpy impact strength of test plaques 33Summary of pagesThis document comprises a front cover, an inside front co
13、ver, pages i to iv, pages 1 to 54, an inside back cover and a back cover.BRITISH STANDARD BSI 2009 iiiBS 8499:2009ForewordPublishing informationThis British Standard is published by BSI and came into effect on 31 July 2009. It was prepared by Technical Committee GSE/25, Gas meters. A list of organiz
14、ations represented on this committee can be obtained on request to its secretary.Use of this documentIt has been assumed in the preparation of this British Standard that the execution of its provisions will be entrusted to appropriately qualified and experienced people, for whose use it has been pro
15、duced.Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) type. Its requirements are expressed in sentences in which the principal auxiliary verb is “shall”.Commentary, explanation and general informative material is presented in smaller italic type, and d
16、oes not constitute a normative element.Contractual and legal considerationsThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.In pa
17、rticular, attention is drawn to the Gas Safety (Installation and Use) Regulations 1998 1.BS 8499:2009iv BSI 2009BRITISH STANDARDThis page deliberately left blankBRITISH STANDARD BSI 2009 1BS 8499:2009IntroductionAs competition in the gas industry has increased, the introduction of new products has l
18、ed to changes to certain designs of meter box for housing gas meters. Consequently, for some types of meter installations the market now comprises several distinct box designs. The number of different designs is causing difficulties for gas installers, meter asset managers and other parties involved
19、 in meter installation.This Standard aims to address some of the disparities in existing box designs to facilitate the installation of meters across the UK. However, it is recognized that some designs, particularly those for the semi-concealed box, will need to be modified over time to obtain a solu
20、tion that meets the aspiration of this Standard.Attention is drawn to the fact that the type and construction of a meter box is subject to approval by the Gas Transporter, and, without this approval, the Gas Transporter may refuse to connect or, in some cases, may disconnect the gas supply to the co
21、nsumers premises.1 ScopeThis British Standard specifies requirements for gas meter boxes for use with single gas meter installations conforming to BS 6400, which:a) are supplied with gases of the 2nd and 3rd family, with a maximum capacity of 6 m3/h and a maximum operating pressure not exceeding 2 b
22、ar; and b) incorporate any of the following meters: diaphragm, ultrasonic, credit or prepayment.It does not apply to multiple meter installations which are installed in the same housing.NOTE 1 The composition of fuel gases of the 2nd and 3rd family is specified in BS EN 437.NOTE 2 All pressures quot
23、ed in this standard are gauge pressures.It covers the following designs of meter box, including any associated box extensions: 1) built-in;2) surface mounted; 3) semi-concealed;4) universal. It does not cover security shrouds intended to provide additional protection to meter installations.This Brit
24、ish Standard also specifies requirements for the design of the standard meter bracket.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of t
25、he referenced document (including any amendments) applies.BS 8499:20092 BSI 2009BRITISH STANDARDBS 476-7, Fire tests on building materials and structures Part 7: Method of test to determine the classification of the surface spread of flame of productsBS 746, Specification for gas meter unions and ad
26、aptorsBS 2782-6:Method 640A:1979, ISO 2577:1975, Methods of testing plastics Part 6: Dimensional properties Method 640A: Determination of shrinkage of test specimens in the form of bars of compression moulded thermosetting moulding materialsBS 3532, Method of specifying unsaturated polyester resin s
27、ystemsBS 3643-1, ISO metric screw threads Part 1: Principles and basic dataBS 3643-2, ISO metric screw threads Part 2: Specification for selected limits of sizeBS 4781:1990, Specification for pressure-sensitive adhesive plastics labels for permanent useBS 5378-2, Safety signs and colours Part 2: Spe
28、cification for colorimetric and photometric properties of materialsBS 6400, Installation of exchange, relocation and removal of domestic-sized gas meters (2nd and 3rd family gases)BS 7371-12, Coatings on metal fasteners Part 12: Requirements for imperial fastenersBS EN 10051, Specification for conti
29、nuously hot-rolled uncoated plate, sheet and strip of non-alloy and alloy steels Tolerances on dimensions and shapeBS EN 10087:1999, Free cutting steels Technical delivery conditions for semi-finished products, hot rolled bars and rodsBS EN 10088-2:2005, Stainless steels Part 2: Technical delivery c
30、onditions for sheet/plate and strip of corrosion resisting steels for general purposesBS EN 10111:2008, Continuously hot rolled low carbon steel sheet and strip for cold forming Technical delivery conditionsBS EN 10130:2006, Cold rolled low carbon steel flat products for cold forming Technical deliv
31、ery conditionsBS EN 10131, Cold rolled uncoated and zinc or zinc-nickel electrolytically coated low carbon and high yield strength steel flat products for cold forming Tolerances on dimensions and shapeBS EN 10346:2009, Continuously hot-dip coated steel flat products Technical delivery conditionsBS
32、EN 14020, Reinforcements Specification for textile glass rovingsBS EN ISO 62:2008, Plastics Determination of water absorptionBS EN ISO 178, Plastics Determination of flexural propertiesBS EN ISO 179-1:2001, Plastics Determination of Charpy impact properties Part 1: Non-instrumented impact testBS EN
33、ISO 295:2004, Plastics Compression moulding of test specimens of thermosetting materialsBS EN ISO 1183-1:2004, Plastics Methods for determining the density of non-cellular plastics Part 1: Immersion method, liquid pyknometer method and titration methodBRITISH STANDARD BSI 2009 3BS 8499:2009BS EN ISO
34、 2081:2008, Metallic and other inorganic coatings Electroplated coatings of zinc with supplementary treatments on iron or steelBS EN ISO 4042:2000, Fasteners Electroplated coatingsBS EN ISO 4589-2, Plastics Determination of burning behaviour by oxygen index Part 2: Ambient-temperature testBS EN ISO
35、9227, Corrosion tests in artificial atmospheres Salt spray test3 Terms and definitionsFor the purposes of this British Standard, the following terms and definitions apply.3.1 built-in meter boxpurpose-made meter box, fitted with a meter bracket, for insetting into a building wall, normally during th
36、e construction of the wall3.2 credit metermeter in which the volume registered by the index is the basis of a periodic account rendered to the consumer3.3 diaphragm meterpositive displacement meter in which the measuring chambers have deformable walls3.4 emergency control valve (ECV)valve for shutti
37、ng off the supply of gas in an emergency, which is intended for use by a consumer of gas and is installed at the end of a service3.5 gas transportercompany, licensed by Ofgem, which transports gas through its network on behalf of a gas shipper3.6 installation pipeworkpipework or fitting from the out
38、let of the primary meter installation to points at which appliances are to be connected NOTE This definition varies from that given in Regulation 2 of the Gas Safety (Installation and Use) Regulations 1998 1 so that the pipework within the meter installation can be distinguished from the consumers i
39、nstallation pipework.3.7 knockoutsection of material which can be removed under pressure to leave a hole3.8 low pressure (LP) gas supply with a maximum operating pressure of 75 mbar3.9 medium pressure (MP)gas supply at the outlet of the emergency control valve with a maximum operating pressure excee
40、ding 75 mbar but not exceeding 2 bar3.10 membrane knockoutknockout where the thickness of the material has been reduced across the entire face to enable removalNOTE Membrane knockouts are generally not more than 1 mm thick.BS 8499:20094 BSI 2009BRITISH STANDARD3.11 meterinstrument designed to measur
41、e, memorize and display the quantity of gas that has passed through it3.12 meter boxpurpose-made compartment designed and prefabricated to accommodate a meter installation3.13 meter box adaptortransition fitting used between the service pipe and the ECV3.14 meter bracketpurpose-made support incorpor
42、ating a means of securing meter unions from which a meter can be suspended3.15 meter installationinstallation that comprises a primary meter, valve, filter, meter regulator and associated protection devices, pliable connection, interconnecting pipework, fitting and supportNOTE A meter installation c
43、ommences at the outlet of the ECV. Depending on the type of meter installation it terminates at:a) the outlet connection of the meter;b) the outlet of the meter outlet adaptor if fitted; orc) in the case of a semi-concealed meter with a pliable connection downstream of the meter, the outlet of the m
44、eter box outlet adaptor.3.16 prepayment metermeter fitted with a mechanism that, on the insertion of a coin, mechanical token or smartcard, permits the passage of a predetermined volume of gas3.17 semi-concealed meter boxpurpose-designed meter box intended to be installed partially below ground leve
45、lNOTE This box is to be installed against a wall or existing structure.3.18 service pipepipe for distributing gas to premises from a distribution main, being any pipe between the distribution main and the outlet of the first emergency control valve downstream from that distribution main3.19 spigottu
46、bular case, sealed to an internal surface of a meter box, which is impermeable to gas and inserted in a prepared hole in a structure for the reception of an installation pipe3.20 surface mounted meter boxpurpose-designed meter box fitted with a meter bracket and intended for attaching to the outside
47、 face of an existing wall3.21 thin-edged knockoutknockout where the thickness of the material has been reduced around the circumference to enable removalNOTE Thin-edged knockouts are generally not more than 0.7 mm thick around the circumference.3.22 ultrasonic metermeter that infers the volume passi
48、ng through it by means of the behaviour of an ultrasonic beamBRITISH STANDARD BSI 2009 5BS 8499:20093.23 universal meter boxmulti-purpose meter box fitted with a meter bracket and intended to be installed, either surface mounted or partially buried into the groundNOTE This box is to be installed aga
49、inst a wall or existing structure.4 Dimensions and featuresCOMMENTARY ON CLAUSE 4When designing a meter box, it is essential to consider two basic objectives. The meter box needs to:a) allow the fitting, operation and replacement of any of the following meter types, when installed in accordance with BS 6400: diaphragm or ultrasonic, credit or prepayment; b) provide unrestricted access, once the meter is installed, to enable:1) the
