1、BRITISH STANDARD BS IEC TR 62157:2001 Cylindrical machined carbon electrodes Nominal dimensions ICS 29.100.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS IEC TR 62157:2001 This British Standard, having been prepared under the direction of the Electrotechnical Sector Poli
2、cy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 1 November 2001 BSI 1 November 2001 ISBN 0 580 38611 2 National foreword This British Standard reproduces verbatim IEC TR 62157:2001 and implements it as the UK national standard. The UK pa
3、rticipation in its preparation was entrusted to Technical Committee PEL/27, Electroheating, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the
4、 old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publica
5、tions referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provis
6、ions 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. aid enquirers to understand the text; present to the responsible international/European committee any enquiries
7、on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the IEC TR title page, pages 2 to 7 and a back cov
8、er. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsTECHNICAL REPORT IECTR 62157 First edition 2001-06 Cylindrical machined carbon electrodes Nominal dimensions Electrodes cylindriques en carbo
9、ne usin Dimensions nominales Reference number IEC/TR 62157:2001(E)INTERNATIONAL ELECTROTECHNICAL COMMISSION _ CYLINDRICAL MACHINED CARBON ELECTRODES NOMINAL DIMENSIONS FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all natio
10、nal electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. T
11、heir preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collabor
12、ates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion
13、on the relevant subjects since each technical committee has representation from all interested National Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical reports or guides and t
14、hey are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC St
15、andard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to
16、 the possibility that some of the elements of this technical report may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical committees is to prepare International Standards. However, a technical committe
17、e may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. Technical reports do not necessarily have to be reviewed until the data they provide are considered t
18、o be no longer valid or useful by the maintenance team. IEC 62157, which is a technical report, has been prepared by IEC technical committee 27: Industrial electroheating equipment. The text of this technical report is based on the following documents: Enquiry draft Report on voting 27/246/CDV 27/26
19、4/RVC Full information on the voting for the approval of this technical report can be found in the report on voting indicated in the above table. 1002:75126RTCEISB BSI1November2001 2 IECTR62157:2001 This publication has been drafted in accordance with the ISO/IEC Directives, Part 3. The committee ha
20、s decided that the contents of this publication will remain unchanged until 2006. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. This document which is purely informative is not to be regarded as an International Standard. A bilingual version
21、 of this publication may be issued at a later date. 1002:75126RTCEISB BSI1November2001 3 IECTR62157:2001 CYLINDRICAL MACHINED CARBON ELECTRODES NOMINAL DIMENSIONS 1 Scope and object This technical report applies to cylindrical carbon electrodes, manufactured from upgraded coal, for use in electric d
22、irect-arc and submerged-arc furnaces, for melting silicium and carbide and for other purposes. This technical report covers dimensions and tolerances on the length and diameter of carbon electrodes; dimensions and thread details for carbon electrode heads and sockets. 2 Designation Cylindrical carbo
23、n electrode with a diameter of 700 mm and a length of 2 400 mm; carbon electrode 700 mm 2 400 mm. 3 Specific characteristics 3.1 Electrode surface The surface of the electrode has to be machined. 3.2 Electrode structure An electrode punched with a 200 g steel hammer should develop a clear tone, clos
24、e to a metallic one. Places with attenuated tone are allowed at a distance of not less than 200 mm from the socket bottom or the bottom surface of the electrode head. 4 Dimensions 4.1 Electrode dimensions Table 1 indicates tolerances in relation to the range of electrode dimensions. Carbon electrode
25、s are machined in order to obtain the desired diameter over the whole electrode length. It may happen that part of the surface remains untouched by the tool when machining the electrodes. This part is called a “low spot”. The depth of the low spot shall not be greater than the value given in table 1
26、. 1002:75126RTCEISB BSI1November2001 4 IECTR62157:2001 Table 1 Tolerances of electrode dimensions Electrode diameter mm Diameter tolerances mm Electrode length mm Length tolerances mm Admissible oval (low spot) mm 200 500 2 1 550 750 3 2 800 1 500 4 2 000 3 000 +40 150 2 NOTE The length of the elect
27、rode is subject to agreement between manufacturer and user. Electrodes which are 10 % shorter are allowed in the lot but they should not be shorter than 1 500 mm. 4.2 Dimensions of the socket and conical head of cylindrical electrodes The shape and standardized dimensions of sockets and cylindrical
28、heads are shown in figure 1. The particular dimensions are given in table 2. b c g b c d a f f e IEC 645/01 Figure 1 Electrode shape and dimensions of the sockets and conical heads 1002:75126RTCEISB BSI1November2001 5 IECTR62157:2001 Table 2 Particular dimensions of the sockets and conical heads acc
29、ording to figure 1 D abcdefg mm mm mm mm mm mm mm mm 200 70 70 150 110 25 16 3 4 75 225 70 75 170 130 25 16 3 4 75 250 70 81 190 150 30 19 3 4 75 285 70 92 220 175 30 19 3 4 75 300 70 92 220 175 30 19 3 4 75 325 70 110 245 185 30 19 3 4 75 350 70 110 245 185 30 19 3 4 75 360 70 110 245 185 30 19 3 4
30、 75 400 70 136 300 225 40 25 4 4 75 450 70 149 320 235 40 25 4 4 75 500 70 179 375 270 40 25 4 4 75 550 70 179 375 270 40 25 4 4 75 600 70 206 435 315 50 32 5 4 75 650 70 206 435 315 50 32 5 4 75 700 70 289 500 290 50 32 5 4 75 750 70 289 500 290 50 32 5 4 75 800 70 317 550 320 50 32 5 4 75 850 70 3
31、17 550 320 50 32 5 4 75 900 70 342 590 340 50 32 5 4 75 950 70 343 590 340 50 32 5 4 75 1 000 70 368 630 360 50 32 5 4 75 1 100 70 443 720 380 50 32 5 4 75 500 5518 13 151 416 191 30 31,6 3 4 70 550 5518 13 151 416 191 30 31,6 3 4 70 600 5518 13 191 510 230 30 31,6 3 4 70 650 5518 13 191 510 230 30
32、31,6 3 4 70 700 5518 13 208 600 283 50 52,8 5 4 70 750 5518 13 208 600 283 50 52,8 5 4 70 800 5518 13 228 685 330 50 52,8 5 4 70 850 5518 13 228 685 330 50 52,8 5 4 70 900 5518 13 247 770 378 50 52,8 5 4 70 950 5518 13 247 770 378 50 52,8 5 4 70 1 000 5518 13 346 900 400 50 52,8 5 4 70 1 050 5518 13
33、 346 900 400 50 52,8 5 4 70 1 100 5518 13 277 900 450 50 52,8 5 4 70 1 200 5518 13 408 1 100 500 50 52,8 5 4 70 1 300 5518 13 408 1 100 500 50 52,8 5 4 70 1 400 5518 13 388 1 150 550 50 52,8 5 4 70 1 500 5518 13 419 1 250 600 50 52,8 5 4 70 700 5518 18 143 600 330 50 52,8 5 4 70 750 5518 18 143 600
34、330 50 52,8 5 4 70 850 5518 18 181,5 770 425 50 52,8 5 4 70 900 5518 18 271,5 770 360 50 52,8 5 4 70 1 050 5518 18 276,9 900 450 50 52,8 5 4 70 850 5518 18 323,8 670 250 40 52,7 5 50 58 900 5518 18 365 750 278 40 52,7 5 50 58 1 050 5518 18 404,6 820 300 40 52,7 5 50 58 1002:75126RTCEISB BSI1November
35、2001 6 IECTR62157:2001 5 Manufacturing defects The following defects are allowed: a) cavities and unmachined places having a depth within the tolerances; b) lamination along, or inclined with, a total length of less than 30 % of the electrode length, and at the same time single lamination should not
36、 exceed 10 % of the electrode length; the inclination angle to the electrode axis should not exceed 30; lamination cannot occur at electrode sockets; c) one defect of head and socket thread of a depth of up to 15 mm and length up to 50 mm for a thread length of 1 m. _ 1002:75126RTCEISB BSI1November2
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