SIST EN 60239:2005

SLOVENSKI SIST EN 60239:2005

STANDARD
december 2005
Grafitne elektrode za električne obločne peči – Mere in označbe (IEC
60239:2005)
Graphite electrodes for electric arc furnaces – Dimensions and designation (IEC
60239:2005)
ICS 25.180.10 Referenčna številka
SIST EN 60239:2005(en)
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

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EUROPEAN STANDARD EN 60239
NORME EUROPÉENNE
EUROPÄISCHE NORM September 2005

ICS 25.180.10 Supersedes EN 60239:1997


English version


Graphite electrodes for electric arc furnaces –
Dimensions and designation
(IEC 60239:2005)


Electrodes en graphite pour les fours  Graphitelektroden für Lichtbogenöfen -
à arc – Maße und Kennzeichnung
Dimensions et dénomination (IEC 60239:2005)
(CEI 60239:2005)






This European Standard was approved by CENELEC on 2005-07-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60239:2005 E

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EN 60239:2005 - 2 -
Foreword
The text of document 27/464/FDIS, future edition 4 of IEC 60239, prepared by IEC TC 27, Industrial
electroheating equipment, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60239 on 2005-07-01.
This European Standard supersedes EN 60239:1997.
Significant technical changes with respect to EN 60239:1997 are as follows:
– addition of 750 mm nominal diameter electrodes;
– revision of electrode diameter and length tolerances;
– revision of nominal lengths and diameters;
– introduction of socket and pin tolerances;
– revision of Annex A on male-female electrodes;
– addition of Annex B on handling and jointing.
This new edition also aims at a better compatibility between EN 60239 and other technical standards
that cover the same subject, as well as better compliance with standards for figures, tables and
symbols – in that respect, and in addition to the content, the format and the title of this standard have
been modified.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-07-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60239:2005 was approved by CENELEC as a European
Standard without any modification.
__________

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- 3 - EN 60239:2005
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
The 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 the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60050-841 2004 International electrotechnical vocabulary - -
Part 841: Industrial electroheat

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NORME CEI
INTERNATIONALE
IEC



60239
INTERNATIONAL


Quatrième édition
STANDARD

Fourth edition

2005-06


Electrodes en graphite pour les fours à arc –
Dimensions et dénomination

Graphite electrodes for electric arc furnaces –
Dimensions and designation

 IEC 2005 Droits de reproduction réservés  Copyright - all rights reserved
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électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
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PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

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60239  IEC:2005 – 3 –

CONTENTS
FOREWORD.5
1 Scope and object .9
2 Normative references.9
3 Terms and definitions .11
4 Electrodes .13
4.1 Description of product.13
4.2 Diameters of electrodes.15
4.3 Lengths of electrodes .17
4.4 Dimensions of sockets.19
4.5 Designation .27
5 Pins.29
5.1 Dimensions .29
5.2 Designation .29
5.3 Non-standard pin design details .29
6 Tolerances for sockets and pins.29
6.1 Tolerances for socket and pin dimensions.29
6.2 Specific requirements on tolerances for socket and pin threaded area.31
6.3 Specific requirements on tolerances for socket and pin unthreaded area .33

Annex A (informative) Male-female electrodes.35
Annex B (informative) Electrode handling and jointing.43

Figure 1 – Electrode with pin .15
Figure 2 – Electrode column.15
Figure 3 – Socket and pin, type T4 .21
Figure 4 – Socket and pin, type T3 .25
Figure A.1 – Male-female electrode, type MF3.37
Figure A.2 – Male-female electrode, type MF4.39
Figure A.3 – Male-female electrode, type MF8.41

Table 1 – Diameters and nominal lengths of electrodes .17
Table 2 – Lengths of electrodes .17
Table 3 – Dimensions of pins and sockets of electrodes (type T4) .23
Table 4 – Dimensions of pins and sockets of electrodes (type T3) .27
Table 5 – Tolerances for sockets and pins (type T4).31
Table 6 – Tolerances for sockets and pins (type T3).31
Table A.1 – Dimensions of male-female electrodes of diameters from 300 mm to
400 mm (type MF3) .37
Table A.2 – Dimensions of male-female electrodes of diameters from 175 mm to
250 mm (type MF4) .39
Table A.3 – Dimensions of male-female electrodes of diameters from 75 mm to
150 mm (type MF8) .41

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60239  IEC:2005 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GRAPHITE ELECTRODES FOR ELECTRIC ARC FURNACES –
DIMENSIONS AND DESIGNATION


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their 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. IEC collaborates 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 IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60239 has been prepared by IEC technical committee 27: Industrial
electroheating equipment.
This fourth edition cancels and replaces the third edition published in 1997 and constitutes a
technical revision.
Significant technical changes with respect to the previous edition are as follows:
− addition of 750 mm nominal diameter electrodes;
− revision of electrode diameter and length tolerances;
− revision of nominal lengths and diameters;
− introduction of socket and pin tolerances;
− revision of Annex A on male-female electrodes;
− addition of Annex B on handling and jointing.

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60239  IEC:2005 – 7 –
This fourth edition also aims at a better compatibility between IEC 60239 and other technical
standards that cover the same subject, as well as better compliance with standards for figures,
tables and symbols – in that respect, and in addition to the content, the format and the title of
this International Standard have been modified.
The text of this standard is based on the following documents:
FDIS Report on voting
27/464/FDIS 27/475/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.

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60239  IEC:2005 – 9 –
GRAPHITE ELECTRODES FOR ELECTRIC ARC FURNACES –
DIMENSIONS AND DESIGNATION



1 Scope and object
This International Standard specifies the dimensions of turned and threaded cylindrical graphite
arc furnace electrodes and graphite electrode pins for use as full graphite electrode columns
on arc furnaces.
This standard covers
• the dimensions and tolerances on length and diameter of electrodes;
• the dimensions, tolerances and thread details for electrode sockets and pins of tapered
shape, used with the electrodes.
The standardization of the above dimensional features is essential for the interchangeability of
electrodes from different sources, and is a minimum standard.
NOTE 1 The standardization ensures that any supplier’s electrode at ambient temperature can accept any other
supplier’s pin of appropriate dimensions.
However, the variety of raw materials and production techniques may lead to different thermal behaviour of finished
products. It is, therefore recommended that electrodes and pins from different sources should not be mixed in use.
Annex A contains information on male-female electrodes used in some countries.
Annex B contains recommendations for electrode handling and jointing procedures.
The metric system is adopted as the standard of measurement.
NOTE 2 The use of decimals has been deliberately limited to two digits after the decimal point.
2 Normative references
The 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
the referenced document (including any amendments) applies.
IEC 60050-841:2004, International Electrotechnical Vocabulary (IEV) – Part 841: Industrial
electroheat

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60239  IEC:2005 – 11 –
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-841 and the
following apply.
NOTE Figure 1, Figure 2, Figure 3 and Figure 4 provide alternative explanation for all terms related to dimensions.
3.1
arc furnace electrode
element of high-current line inserted through the electrode port inside the furnace body,
enabling the ignition and maintenance of an arc between the electrode tip and charge, or the
tip of another electrode
[IEV 841-26-38]
3.2
(graphite) (arc furnace) electrode
arc furnace electrode made of graphite, turned to a cylinder and machined with threaded areas
at each end so as to permit assembly as a column using an electrode pin
NOTE Electrodes are machined as cylinders to permit holding in the electrode clamp.
3.3
male-female electrode
arc furnace electrode made of graphite where the assembly is made possible without electrode
pins but through the machining of one end of the electrode as an external (male) thread and
the other end as an internal (female) thread
3.4
electrode column
assembly of several arc furnace electrodes
NOTE Electrode columns are also called continuous electrodes.
3.5
(electrode) pin
electrode nipple
part made of graphite, in the shape of truncated cones with common base, threaded both
sides, joining two arc furnace electrodes of the same diameter
[IEV 841-26-47, modified]
3.6
socket (of an electrode)
internal taper-threaded area located at each end of an electrode that can be equipped with a
corresponding electrode pin
3.7
joint
assembly of two threaded electrode sockets and their matching pin
3.8
taper
full angle of the cone represented by the pitch line of the threads
NOTE The taper (see Figures 3 and 4) can be referenced to using the actual angle or its tangent.

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60239  IEC:2005 – 13 –
3.9
slope
angle between the thread pitch line and axis of thread
NOTE The slope angle is half of the taper angle. It can be referenced by using the actual angle or its tangent.
3.10
pitch diameter of the pin
diameter of the circle, intersection of the plane perpendicular to the axis of the pin
...