1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 7865 : 1997 Incorporat
2、ing Amendment No. 1 ICS 29.280 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Steel electrical conductor rail for railway motive power supplyThis British Standard, having been prepared under the direction of the Engineering Sector Board, was published under
3、the authority of the Standards Board and comes into effect on 15 January 1997 BSI 1997 The following BSI references relate to the work on this standard: Committee reference RAE/2 Draft for comment 95/703590 DC ISBN 0 580 26214 6 BS 7865 : 1997 Issue 2, December 1997 Amendments issued since publicati
4、on Amd. No. Date Text affected 9686 December 1997 Indicated by a sideline in the margin Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee RAE/2, Railway track components, upon which the following bodies were represented: Br
5、itish Iron and Steel Producers Association British Precast Concrete Federation Ltd. British Railways Board Confederation of British Forgers Department of Transport (Transport Industries) London Underground Ltd. Prestressed Concrete Association Society of Chemical Industry Timber Research and Develop
6、ment AssociationIssue 1, December 1997 BS 7865 : 1997 BSI 1997 a Summary of pages The following table identifies the current issue of each page. Issue 1 indicates that a page has been introduced for the first time by amendment. Subsequent issue numbers indicate an updated page. Vertical sidelining o
7、n replacement pages indicates the most recent changes (amendment, addition, deletion). Page Issue Page Issue Front cover Inside front cover a b i ii 2 2 1 blank original original 1t o5 6 7 8 Inside back cover Back cover original 2 2 original original originalb blankBS 7865 : 1997 BSI 1997 i Contents
8、 Page Committees responsible Inside front cover Foreword ii Specification 1 Scope 1 2 References 1 3 Information and requirements to be agreed and to be documented 1 4 Manufacture 5 5 Chemical composition 5 6 Dimensions and properties 5 7 Marking 5 8 Electrical resistivity 6 9 Gauges 6 10 Freedom fr
9、om defects 6 11 Tolerances 6 12 Chemical analysis 6 13 Electrical resistivity tests 6 14 Manufacturers tests and certificates 7 15 Accuracy of testing equipment 7 Annex A (informative) Section properties 8 Tables 1 Chemical composition 5 2 Section tolerances 6 Figures 1 Dimensions and properties of
10、Section No. 65 conductor rail 2 2 Dimensions and properties of Section No. 75 FB conductor rail 3 3 Dimensions and properties of Section No. 74 TW conductor rail 4 List of references Inside back coverii BSI 1997 BS 7865 : 1997 Foreword This standard has been prepared by Technical Committee RAE/2. Du
11、ring the development of this standard, the designations of the conductor rails have been revised as follows: the designation formerly known as No. 74 FB conductor rail, is now No. 75 FB conductor rail because the actual mass per metre is 75.17 kg/m; the designation formerly known as No. 75 TW conduc
12、tor rail, is now No. 74 TW conductor rail because the actual mass per metre is 74.49 kg/m. Assessed capability. Users of this British Standard are advised to consider the desirability of quality system assessment and registration against BS EN ISO 9002 by a third party certification body. Compliance
13、 with a British Standard does not of itself confer immunity from legal obligations. BSI 1997 1 BS 7865 : 1997 Specification 1 Scope This standard specifies requirements for rolled steel conductor rails used for the supply of electrical power for traction in third rail and fourth rail electrified rai
14、lways. The chemical composition and electrical conductivity of the rolled steel used, and the dimensions and tolerances of the conductor rails themselves are specified. In addition to the definitive requirements, this standard also requires the items detailed in clause 3 to be documented. For compli
15、ance with this standard, both the definitive requirements and the documented items have to be satisfied. NOTE 1. The section properties are given for information in annex A. NOTE 2. This standard may also be applied to other conductor rail sections than those shown in figures 1, 2 and 3. 2 Reference
16、s 2.1 Normative references This British Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the e
17、dition cited applies; any subsequent amendments to or revisions of the cited publication apply to this British Standard when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 2.2 Informat
18、ive references This British Standard refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 3 Information and requirement
19、s to be agreed and to be documented The following information to be supplied by the purchaser shall be fully documented. Both the definitive requirements specified throughout the standard and the following documented items shall be satisfied before a claim of compliance with the standard can be made
20、 and verified. a) The title of this standard. b) The section number of the conductor rail section (see figures 1, 2 or 3) or full details of any other section, required. c) Confirmation of acceptance of normal branding (see 7.1) or any special requirements of branding. d) Confirmation of acceptance
21、of specified length tolerance, or any special length tolerance requirements (see clause 11). e) Whether or not special end straightness checking and rectification is required (see 11.4). f) A description of the rolling and finishing processes employed, if requested by the purchaser (see 4.2). g) The
22、 typical form in which electrical resistivity is to be quoted if different from that given in 13.1.2 BSI 1997 BS 7865 : 1997 89 R 6.5 R 3.5 R 2 R 5 9.5 9.5 70 R 380 102 66.5 32 All dimensions in mm Section properties Cross-sectional area 83.33 cm 2 Mass per metre 65.41 kg/m Distance of centroid from
23、 head 48.86 mm Moment of inertia X-X (horizontal) axis 677.04 cm 4 Moment of inertia Y-Y (vertical) axis 483.57 cm 4 Section modulus X-X (horizontal) axis 127.40 cm 3 Section modulus Y-Y (vertical) axis 108.67 cm 3 Figure 1. Dimensions and properties of No. 65 conductor rail BSI 1997 3 BS 7865 : 199
24、7 89 R 7 R 7 R 7 R 7 R 7 22.5 R 3 max. 140 138 49.2 39.6 1 : 4.89 1 : 4.89 R 380 All dimensions in mm Section properties Cross-sectional area 95.77 cm 2 Mass per metre 75.17 kg/m Distance of centroid from head 75.78 mm Moment of inertia X-X (horizontal) axis 2163.93 cm 4 Moment of inertia Y-Y (verti
25、cal) axis 891.65 cm 4 Section modulus X-X (horizontal) axis 285.55 cm 3 Section modulus Y-Y (vertical) axis 127.38 cm 3 Figure 2. Dimensions and properties of No. 75 FB conductor rail4 BSI 1997 BS 7865 : 1997 R 6.5 R 6.5 R 6.5 R 3.5 R 2 R 2 105 124 70 103.5 31.8 44.7 1 : 4.33 1 : 4.33 R 610 All dime
26、nsions in mm Section properties Cross-sectional area 94.89 cm 2 Mass per metre 74.49 kg/m Distance of centroid from head 52.72 mm Moment of inertia X-X (horizontal) axis 972.16 cm 4 Moment of inertia Y-Y (vertical) axis 773.76 cm 4 Section modulus X-X (horizontal) axis 184.41 cm 3 Section modulus Y-
27、Y (vertical) axis 124.80 cm 3 Figure 3. Dimensions and properties of No. 74 TW conductor rail BSI 1997 5 BS 7865 : 1997 4 Manufacture 4.1 Manufacture of steel The source of the steel and the steelmaking process shall be the responsibility of the manufacturer of the conductor rail. If requested by th
28、e purchaser at the time of enquiry the manufacturer shall describe the source of steel supply and the steelmaking and casting processes employed. The manufacturer shall not alter these without the agreement of the purchaser. 4.2 Manufacture of rails The rails shall be manufactured from a hot-rolled
29、section finished in accordance with the section tolerances of clause 11. The rolling and finishing processes shall be the responsibility of the manufacturer. If requested by the purchaser at the time of enquiry or order the manufacturer shall describe the rolling and finishing processes employed (se
30、e clause 3 f). The manufacturer shall not alter these without the agreement of the purchaser. NOTE 1. The purchaser may undertake quality assurance audits as considered necessary. NOTE 2. The purchaser may witness the manufacturing process, and sampling and testing operations. 5 Chemical composition
31、 When tested in accordance with clause 12 the chemical composition of the steel shall conform to the limits given in table 1. Table 1. Chemical composition of steel Chemical composition % by mass Carbon Silicon Manganese Phosphorus Sulfur Ladle analysis 0.08 max 0.05 max 0.30 max 0.05 0.05 max Produ
32、ct analysis 0.08 max 0.05 max 0.30 max 0.05 max 0.05 max 6 Dimensions and properties The dimensions shall be in accordance with one of the figures 1, 2 or 3. NOTE 1. The section properties are given for information in figures 1, 2 and 3. NOTE 2. This specification may also be applied to other conduc
33、tor rail sections. 7 Marking 7.1 Branding NOTE 1. If agreed at the time of enquiry and order, other information may be included in the brand marking. (see clause 3 c). NOTE 2. Some section profiles, e.g. No. 65, or service applications, preclude the use of branding. Where brand marks are not preclud
34、ed they shall be rolled in relief on one side of the web, or other agreed position of each rail. The brand markings shall include: a) the number of this British Standard; b) the identity of the rail section; c) the identification mark of the manufacturer; d) the last two figures of the year of manuf
35、acture. Each element of the brand mark shall be separated by a hyphen of minimum length 0.7 times the height of the brand letters and numbers, for example: BS 7865 - 75 FB - X b) the number of the ingot or the continuously cast strand and bloom; c) the position of the rail relative to the top of the
36、 ingot or bloom. NOTE. For the purpose of identification, a rail should be considered to be that which exists as a single length after hot sawing. Where such rails are subsequently cold sawn or machined to produce two or more shorter lengths, these should each bear the identification of the original
37、 hot sawn rail. 7.2.2 Manual hot stamping When manual hot stamping is carried out the specified rail identification shall be stamped on the side of the rail web, or an agreed location, at a distance approximately 500 mm from the rail end. 7.2.3 Machine hot stamping When repetitive machine hot stampi
38、ng is carried out, the specified rail identification shall appear at least once every 5 m along the length of the rail. 7.2.4 Casting process identification The manufacturer shall ensure that rails rolled from continuously cast blooms can be separately identified from rail produced from ingots. 7.2.
39、5 Sequence casting identification In the case of sequence continuous casting, a heat shall be considered as including all blooms up to, but excluding, the first bloom that is known to be entirely of the next melt.6 BSI 1997 BS 7865 : 1997 Issue 2, December 1997 | | 8 Electrical resistivity The elect
40、rical resistivity of the rail steel shall be measured in accordance with clause 13. The electrical resistivity of the steel shall not exceed 11.04mV cm at a rail temperature of 15 C. 9 Gauges The master rail profile and all the gauges required for checking the manufacture shall be provided by the ma
41、nufacturer, at his own expense. 10 Freedom from defects Removal of minor surface defects shall be by a method approved by the purchaser. No other manufacturing operations shall be carried out with the object of concealing any defects. 11 Tolerances 11.1 Rail section profile The tolerances applied to
42、 the nominal rail section profile dimensions shall be in accordance with table 2. Table 2. Section tolerances Dimensions in mm Overall height of rail measured at the rail end Width of head Thickness of web Width of foot 20.50 +1.00 0.80 0.80 1.20 11.2 Rail length The tolerance to be applied to the n
43、ominal ordered length shall be 25 mm up to a maximum main length of 18.3 m. Special requirements for other length tolerances shall be agreed between the purchaser and manufacturer at the time of enquiry and order. (See clause 3 d). 11.3 End squareness The deviation from square in both horizontal and
44、 vertical directions shall not exceed 0.50 mm. All burrs arising from the cold sawing or machining of the rail ends shall be removed prior to final inspection and despatch. 11.4 Straightness A finished rail, after cold straightening, shall, when standing on its base or lying on its side, be capable
45、of being pulled by hand into a straight line and of retaining that position. The straightness of the rail shall be judged by eye but, in case of doubt or dispute, the affected portion shall be checked using a 1500 mm straightedge. The maximum permissible deviation shall be 1.5 mm measured as the max
46、imum ordinate on a chord of 1500 mm. Rails shall, if agreed between the purchaser and manufacturer at the time of enquiry and order, have the ends checked by means of a 1000 mm straightedge. The maximum deviation from straight, in both the horizontal and vertical planes, shall not exceed 1.0 mm meas
47、ured as the maximum ordinate on a chord of 1000 mm (See clause 3 e). Any rails not conforming to these requirements shall be rectified and re-inspected. 11.5 Twist The maximum twist permissible shall be an angle of 3 in an 18.3 m rail length, with a pro rata adjustment on other rail lengths. 12 Chem
48、ical analysis The chemical composition of each heat of steel shall conform to the limits given in table 1. 13 Electrical resistivity tests 13.1 Method of test The test to determine electrical resistivity shall be carried out on a sample approximately 2 m long cut from a rolled rail. Unless otherwise
49、 agreed at the time of enquiry and order, the sample position shall be at the discretion of the manufacturer. Place the sample test piece on insulated knife edge contacts approximately 1500 mm apart, and make electrical connections with cleaned ends of the sample test piece. The distance between the knife edges shall be measured to within an accuracy of 1.0 mm. Pass a direct current of not less than 100 A through the rail and measure the drop of voltage across the knife edges by means of a milli-voltmeter. Record the relative humidity which shall be betw
