prEN ISO 13578
(Main)Industrial furnaces and associated processing equipment - Safety requirements for machinery and equipment for production of steel by electric arc furnaces (ISO/DIS 13578:2016)
Industrial furnaces and associated processing equipment - Safety requirements for machinery and equipment for production of steel by electric arc furnaces (ISO/DIS 13578:2016)
ISO 13578:2017 specifies the general safety requirements for electric arc furnaces (EAF) to melt steel not containing radioactive material.
NOTE Radioactive material is considered to be detected in front of the steel plant entrance.
ISO 13578:2017 deals with significant hazards, hazardous situations and events as listed in Table 1 pertinent to EAF, when used as intended and under conditions foreseen by the manufacturer, and also includes foreseeable faults and malfunctions in case of misuse.
ISO 13578:2017 also specifies criteria for the plant and equipment integrated in the production process.
ISO 13578:2017 specifies the requirements to be followed during design to ensure the safety of persons, which are to be met during transport, assembly, commissioning, operation, maintenance and decommissioning of the equipment.
ISO 13578:2017 assumes that installations are operated and maintained by adequately trained personnel. Manual intervention for setting, adjustment and maintenance is accepted as part of the normal use of the equipment.
ISO 13578:2017 covers the following equipment (see Annex B, Tables B.1 and B.2, and Annex C, Figures C.1 and C.2):
- EAF with alternating current (AC) technology;
- EAF with direct current (DC) technology;
- scrap preheating technology;
- associated equipment/devices (e.g. inert gas stirring, carbon and oxygen injection systems).
The following equipment is not covered by ISO 13578:2017:
- induction furnace;
- resistance-arc furnace (e.g. submerged arc furnace);
- electron beam furnace;
- plasma furnace;
- other electrical furnaces used in secondary steelmaking, e.g. ladle furnace.
ISO 13578:2017 does not specify safety requirements for the following equipment, which can be an integral or complementary part of the equipment covered by the scope:
- cranes;
- shell lifting cross beam;
- scrap basket, steel ladle and slag pot;
- transport cars for scrap baskets, steel ladles and slag pots;
- dedusting system;
- "dog house" and "elephant house" (furnace enclosures for environmental reasons);
- alloying system;
- separate scrap drying equipment;
- furnace transformer and high-voltage system;
- robots/manipulators (e.g. for temperature measurement and sampling).
Fours industriels et équipements associés - Exigences de sécurité pour les machines et les équipements pour la production d'acier par four à arc électrique (ISO/DIS 13578:2016)
Le présent document spécifie les spécifications générales de sécurité pour les fours à arc électrique (FAE) destinés à la fusion de l'acier, ne contenant pas de substances radioactives.
NOTE Les substances radioactives sont considérées comme détectées devant l'entrée de l'aciérie.
Le présent document traite des phénomènes dangereux, situations et évènements dangereux significatifs énumérés dans le Tableau 1, pertinents pour les FAE lorsqu'ils sont utilisés normalement et dans les conditions prévues par le fabricant. Il inclut aussi les défauts et dysfonctionnements prévisibles en cas de mauvais usage.
Le présent document spécifie également des critères pour les installations et équipements intégrés au processus de production.
Le présent document spécifie les spécifications à respecter lors de la conception pour assurer la sécurité des personnes pendant le transport, l'assemblage, la mise en service, l'utilisation, la maintenance et la mise hors service de l'équipement.
Le présent document suppose que les installations sont exploitées et entretenues par un personnel dûment qualifié. Une intervention manuelle pour le réglage, l'ajustement et la maintenance est acceptée comme faisant partie de l'utilisation normale des équipements.
Le présent document concerne les équipements suivants (voir l'Annexe B, Tableaux B.1 et B.2, et l'Annexe C, Figures C.1 et C.2):
— FAE avec technologie à courant alternatif (CA);
— FAE avec technologie à courant continu (CC);
— technologie de préchauffage de la ferraille;
— équipements/dispositifs associés (par exemple agitation de gaz inerte, systèmes d'injection de carbone et d'oxygène).
Les équipements suivants ne sont pas couverts par le présent document:
— four à induction;
— four à résistance à arc (par exemple four à arc immergé);
— four à faisceau d'électrons;
— four à plasma;
— autres fours électriques utilisés pour la production d'acier secondaire, par exemple four à poche.
Le présent document ne spécifie pas les exigences de sécurité des équipements suivants, qui peuvent faire partie intégrante ou venir compléter les équipements couverts par le domaine d'application:
— grues;
— poutre transversale pour le levage de la virole;
— panier à ferrailles, poche d'acier et poche à laitier;
— wagons de transport des paniers à ferrailles, poches d'acier et poches à laitier;
— système de dépoussiérage;
— «dog house» et «elephant house» (enceintes du four prévues pour des raisons environnementales);
— système d'alliage;
— équipement séparé de séchage de la ferraille;
— transformateur du four et système haute tension;
— robots/manipulateurs (par exemple pour le mesurage de la température et l'échantillonnage).
Industrijske peči in pripadajoča procesna oprema - Varnostne zahteve za stroje in opremo za proizvodnjo jekla z električnimi obločnimi pečmi (ISO/DIS 13578:2016)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2016
,QGXVWULMVNHSHþLLQSULSDGDMRþDSURFHVQDRSUHPD9DUQRVWQH]DKWHYH]DVWURMHLQ
RSUHPR]DSURL]YRGQMRMHNOD]HOHNWULþQLPLREORþQLPLSHþPL ,62',6
Industrial furnaces and associated processing equipment - Safety requirements for
machinery and equipment for production of steel by electric arc furnaces (ISO/DIS
13578:2016)
Fours industriels et équipements associés - Exigences de sécurité pour les machines et
les équipements pour la production d'acier par four à arc électrique (ISO/DIS
13578:2016)
Ta slovenski standard je istoveten z: prEN ISO 13578
ICS:
13.110 Varnost strojev Safety of machinery
25.180.10 (OHNWULþQHSHþL Electric furnaces
77.180 Oprema za metalurško Equipment for the
industrijo metallurgical industry
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT INTERNATIONAL STANDARD
ISO/DIS 13578
ISO/TC 244 Secretariat: JISC
Voting begins on: Voting terminates on:
2016-05-12 2016-08-11
Industrial furnaces and associated processing equipment
- Safety requirements for machinery and equipment for
production of steel by electric arc furnaces
Fours industriels et équipements associés — Exigences de sécurité pour les machines et les équipements
pour la production d’acier par four à arc électrique
ICS: 13.100; 25.180.01
ISO/CEN PARALLEL PROCESSING
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Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
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ISO/DIS 13578:2016(E)
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TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
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PROVIDE SUPPORTING DOCUMENTATION. ISO 2016
ISO/DIS 13578:2016(E)
© ISO 2016, Published in Switzerland
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ii © ISO 2016 – All rights reserved
ISO/DIS 13578:2016(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 3
4 Symbols and abbreviated terms . 6
5 Safety requirements and/or measures . 6
5.1 General . 6
5.1.1 General design requirements . 6
5.1.2 Electrical melting power supply . 7
5.1.3 Electrical low voltage supply and control system . 7
5.1.4 Bonding and grounding of mechanical furnace parts . 7
5.1.5 Hydraulic, pneumatic, cooling and lubrication systems . 7
5.1.6 Molten material . 7
5.1.7 Linked equipment . 8
5.1.8 Ergonomic principles . 8
5.1.9 Leakage from hydraulic system and EAF-Transformer . 9
5.1.10 Access . 9
5.1.11 Safety related control system .10
5.1.12 Danger zone .10
5.1.13 Blocking device for tilting platform .10
5.1.14 Gantry movement .10
5.1.15 Loss of energy .10
5.1.16 Electrode clamp .11
5.1.17 EAF control room .11
5.1.18 Local control stand . .11
5.1.19 Portable wireless control box .11
5.1.20 Personal protective equipment (PPE) .11
5.1.21 Warnings .12
5.1.22 Surface temperatures and heat radiation .12
5.1.23 Noise .12
5.1.24 Vibrations .13
5.1.25 Special requirements for explosion prevention and protection .13
5.1.26 Safety layout . .14
5.2 List of significant hazards, hazardous situations, safety requirements and/or measures .14
6 Verification of the safety requirements and/or measures .18
7 Information for use .19
7.1 General .19
7.2 Warning devices and safety signs .19
7.3 Minimum marking .19
7.4 Accompanying documents .19
7.4.1 Instruction handbook .19
7.4.2 Maintenance manual .22
7.5 Training of personnel .22
Annex A (normative) Noise test code .24
Annex B (normative) Equipment covered by this document .28
Annex C (informative) Examples of electric arc furnaces .30
Bibliography .32
ISO/DIS 13578:2016(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 13578 was prepared by Technical Committee ISO/TC 244, Industrial furnaces and associated
processing equipment.
iv © ISO 2016 – All rights reserved
ISO/DIS 13578:2016(E)
Introduction
This document is a type C standard as stated in ISO 12100.
The machinery concerned and the extent to which hazards, hazardous situations and events are
covered are indicated in the scope of this document.
When provisions of this type C standard are different from those which are stated in type A or B
standards, the provisions of this type C standard take precedence over the provisions of the other
standards, for machines that have been designed and built according to the provisions of this type C
standard.
Where for clarity an example of a preventive measure is given in this document, this should not been
considered as the only possible solution. Any other solution leading to the same risk reduction is
permissible if an equivalent level of safety is achieved.
DRAFT INTERNATIONAL STANDARD ISO/DIS 13578:2016(E)
Industrial furnaces and associated processing equipment
- Safety requirements for machinery and equipment for
production of steel by electric arc furnaces
1 Scope
This document specifies the general safety requirements for electric arc furnaces (EAF) to melt steel
not containing radioactive material.
NOTE Radioactive material is considered to be detected in front of the steel plant entrance
This document deals with significant hazards, hazardous situations and events as listed in Table 1
pertinent to EAF, when used as intended and under conditions foreseen by the manufacturer, but also
includes foreseeable faults and malfunctions in case of misuse.
This document specifies also criteria for the plant and equipment integrated in the production process.
This document specifies the requirements to be followed up during design to ensure the safety of
persons which are to be met during transport, assembly, commissioning, operation, maintenance and
decommissioning of the equipment.
This document assumes that installations are operated and maintained by adequately trained
personnel. Manual intervention for setting, adjustment and maintenance is accepted as part of the
normal use of the equipment.
This document covers the following equipment (see Annex B):
— EAF with AC technology (alternating current);
— EAF with DC technology (direct current);
— scrap pre-heating technology;
— associated equipment/devices (e.g., inert gas stirring, carbon and oxygen injection systems).
The following equipment is not covered by this document:
— induction furnace;
— resistance-arc furnace (e.g., submerged arc furnace);
— electron beam furnace;
— plasma furnace;
— other electrical furnaces used in secondary steelmaking, e.g., ladle furnace.
This document does not specify safety requirements for the following equipment, which can be an
integral or complementary part of the equipment covered by the Scope:
a) cranes;
b) shell lifting cross beam;
c) scrap basket, steel ladle and slag pot;
d) transport cars for scrap baskets, steel ladles and slag pots;
ISO/DIS 13578:2016(E)
e) dedusting system;
f) “dog house” and “elephant house” (furnace enclosures for environmental reasons);
g) alloying system;
h) separate scrap drying equipment;
i) furnace transformer and high voltage system;
j) robots/manipulators (e.g., for temperature measurement and sampling).
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.
ISO 3864-1, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for safety
signs and safety markings
ISO 3864-2, Graphical symbols — Safety colours and safety signs — Part 2: Design principles for product
safety labels
ISO 3864-3, Graphical symbols — Safety colours and safety signs — Part 3: Design principles for graphical
symbols for use in safety signs
ISO 4413, Hydraulic fluid power — General rules and safety requirements for systems and their components
ISO 4414, Pneumatic fluid power — General rules and safety requirements for systems and their components
ISO 4871, Acoustics — Declaration and verification of noise emission values of machinery and equipment
ISO 7010, Graphical symbols — Safety colours and safety signs — Registered safety signs
ISO 7731, Ergonomics — Danger signals for public and work areas — Auditory danger signals
ISO 11064-1, Ergonomic design of control centres — Part 1: Principles for the design of control centres
ISO 11202:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission
sound pressure levels at a work station and at other specified positions applying approximate environmental
corrections
ISO 11428, Ergonomics — Visual danger signals — General requirements, design and testing
ISO 11429, Ergonomics — System of auditory and visual danger and information signals
ISO 11688-1, Acoustics — Recommended practice for the design of low-noise machinery and equipment —
Part 1: Planning
ISO 12100, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13574, Industrial furnaces and associated processing equipment — Vocabulary
ISO 13732-1, Ergonomics of the thermal environment — Methods for the assessment of human responses to
contact with surfaces — Part 1: Hot surfaces
ISO 13849-1/A1:2013, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design
ISO 13857, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and
lower limbs
2 © ISO 2016 – All rights reserved
ISO/DIS 13578:2016(E)
ISO 14120, Safety of machinery — Guards — General requirements for the design and construction of fixed
and movable guards
ISO 14122-1, Safety of machinery — Permanent means of access to machinery — Part 1: Choice of fixed
means of access between two levels
ISO 14122-2, Safety of machinery — Permanent means of access to machinery — Part 2: Working platforms
and walkways
ISO 14122-3, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs, stepladders
and guard-rails
ISO 14122-4, Safety of machinery — Permanent means of access to machinery — Part 4: Fixed ladders
ISO 16069, Graphical symbols — Safety signs — Safety way guidance systems (SWGS)
IEC 60204-1Edition 5.1:2009, Safety of machinery — Electrical equipment of machines — Part 1: General
requirements
IEC 60519-4, Safety in electroheat installations — Part 4: Particular requirements for arc furnace
installations
IEC 61310-1, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual,
acoustic and tactile signals
IEC 61310-2, Safety of machinery — Indication, marking and actuation — Part 2: Requirements for marking
IEC 61511-1, Functional safety — Safety instrumented systems for the process industry sector — Part 1:
Framework, definitions, system, hardware and software requirements
IEC 62061Edition 1.2:2015, Safety of machinery — Functional safety of safety-related electrical, electronic
and programmable electronic control systems
EN 13463-1:2009, Non-electrical equipment for use in potentially explosive atmospheres — Part 1: Basic
method and requirements
3 Terms and definitions
For the purpose of this document, the terms and definitions given in ISO 12100, ISO 13574 and the
following apply.
NOTE 1 to entry Definition used in ISO standards referred to in this document are also valid for this document.
3.1
charge material
material which is charged into the furnace
Note 1 to entry: to entry: e.g., steel scrap, DRI, HBI, hot metal, FeCr, alloys
3.2
heat cycle
tap-to-tap time period between two consecutive tappings with defined power-on and power-off time
3.3
hydraulic fluid
fluid used to transmit force via hydraulic pressure
Note 1 to entry: to entry: see ISO 6743-4
ISO/DIS 13578:2016(E)
3.4
fire-resistant hydraulic fluid
hydraulic fluid that is difficult to ignite and shows little tendency to propagate flame
[SOURCE: ISO 5598, 3.2.271]
3.5
ladle
vessel to collect, transport and charge/discharge hot metal/steel
3.6
work station
predefined locations for personnel conducting control, production or maintenance activities, the main
work stations are:
3.6.1
EAF control room
main control room in which the control consoles and monitoring facilities for an EAF are located
Note 1 to entry: to entry: It is a location where operating personnel is required permanently during the
production process
3.6.2
local control stands
control units usually situated adjacent to the equipment
Note 1 to entry: to entry: It is a location where operating personnel is required temporarily during the
production process, e.g., during tapping
3.6.3
portable wireless control box
mobile control units connected to the control system
Note 1 to entry: to entry: e.g., to position equipment more precisely
3.6.4
maintenance points
locations where personnel are required during maintenance
Note 1 to entry: to entry: All above mentioned stations could also be used for maintenance
3.7
tilting
movement of the furnace to discharge molten steel or slag from foreseen openings
3.8
blocking device
device to block the equipment in the desired position
3.9
gantry
structure used for lifting and swinging roof and columns/electrode arms
3.10
high voltage switch gear
furnace breaker to connect and disconnect the EAF to/from electrical high voltage supply
3.11
reactor
device to increase the reactance of the EAF system
4 © ISO 2016 – All rights reserved
ISO/DIS 13578:2016(E)
3.12
furnace transformer
device for the transformation of the high voltage electrical supply to arc voltage
3.13
alloying system
device to store and feed any metallic and non-metallic materials to/into the EAF
3.14
electrode nippling system
device, in which electrode strands can be stored or new electrode sections are added
3.15
dog house
furnace enclosure inside the EAF building close to the EAF
Note 1 to entry: to entry: It is serving as indirect fume extraction system and minimising noise
propagation. It is not covered by the scope.
3.16
elephant house
furnace enclosure as part of the EAF building
Note 1 to entry: to entry: It is serving as indirect fume extraction system and minimising noise
propagation. It is not covered by the scope.
3.17
gas cleaning system
equipment for the collection and processing of created off-gas
3.18
high current system
high current connection-line between transformer and electrode
3.19
trained personnel
persons with the knowledge of systems, background, experience and ability to operate and/or maintain
the equipment in the intended use and proper operation of the machinery/equipment
3.20
authorized personnel
trained persons who are nominated by the user to perform a specific task on a specific equipment
3.21
maintenance
all activities carried out outside the production process:
3.21.1
inspection
basic checks (e.g., visual) of equipment;
3.21.2
service
periodic exchange of lances, cleaning (e.g., lance, slag door area), lubrication, adjustment of limit
switches;
3.21.3
repair
repair or exchange of damaged components accompanied with complete shutdown (i.e. isolation of
energy);
ISO/DIS 13578:2016(E)
3.21.4
relining
all activities from shut down of EAF for relining up to start-up of the EAF
3.22
safety layout
graphic overview of the EAF with arrangement of safety-related elements and details
3.23
manufacturer
any natural or legal person declared as responsible for compliance with the requirements of the design
and/or manufacture of machinery
Note 1 to entry: to entry: The process of design and construction of machinery may involve several
individuals or companies, but one is declared as the manufacturer.
4 Symbols and abbreviated terms
For the purpose of this document, the following abbreviations apply.
AC Alternating Current;
DC Direct Current;
EAF Electric Arc Furnace;
EBT Eccentric Bottom Tap-Hole;
DRI Direct Reduced Iron;
HBI Hot Briquetted Iron;
HMI Human-Machine-Interface;
CCTV Closed Circuit Television.
5 Safety requirements and/or measures
5.1 General
5.1.1 General design requirements
EAF and equipment conforming to this document shall comply with the safety requirements and/or
measures of this clause.
This document assumes that:
— machinery is used with adequate workplace lighting conforming to ISO 8995-1or to local regulations.
The manufacturer shall undertake and record design calculations of the structural assembly according
the intended use, e.g., for steel sections, auxiliaries.
Safety devices shall be protected against damage to fulfil the intended function during continuous
operation in the respective area.
In particular the design shall include requirements and constructional details with respect to:
— accessibility;
— guards and protection;
6 © ISO 2016 – All rights reserved
ISO/DIS 13578:2016(E)
— maintenance openings and clearance gaps for cleaning;
— escape routes;
— movement of machinery and material;
— safety during operation;
— safety devices, e.g. hold-to-run control, emergency stop;
— requirements for media systems;
— slag area, e.g. heat protected;
— emergency pit for liquid steel being able to contain the steel volume of the EAF;
— potential environmental conditions, e.g. seismic activities.
5.1.2 Electrical melting power supply
The electrical melting power supply, comprising of the high voltage switch gear, reactor (if applicable),
furnace transformer, AC/DC converters (if applicable) and interconnecting high current systems and
cables, shall meet the requirements as defined in IEC 60519-4.
5.1.3 Electrical low voltage supply and control system
The electrical low voltage supply, comprising of low voltage switch gear, control system and low voltage
cables, shall meet the requirements as defined IEC 60204-1 Edition 5.1.
5.1.4 Bonding and grounding of mechanical furnace parts
To prevent potential differences between mechanical furnace parts, all of these parts shall be bonded
and grounded according to IEC 60519-4.
5.1.5 Hydraulic, pneumatic, cooling and lubrication systems
Hydraulic and pneumatic fluid systems and their components shall meet the requirements as defined in
ISO 4413 and ISO 4414.
Instruction shall be given in the information for use about systems filled with fluids, which are likely
to solidify and/or change viscosity under extreme environmental temperatures and which may cause
hazardous situations.
The design of cooling systems, hydraulic and lubrication systems shall consider risks created by
temperature and pressure, ignition sources, including fire and toxic effects, as well as gas/dust
reactions.
Instructions shall be given how to deal with small and large water leakages inside the furnace. In case
of large leakages, indications of the water flow measurement shall be given to the control system to
initiate further actions, e.g., stop water flow.
Media, which have to be discharged into dedicated sumps, shall be specified. Equipment which is needed
for discharge shall be provided. Instructions for discharge shall be given in the information for use.
5.1.6 Molten material
Slag from furnace shall be guided to slag area (e.g., slag pot, slag pit).
Water and/or moisture shall be avoided at slagging and tapping area. Foundation shall be walled by
refractory lining. Instruction shall be given, see 7.4.1.1.
ISO/DIS 13578:2016(E)
5.1.7 Linked equipment
Equipment linked to the EAF such as:
— alloying system (tanks/vessels, structures, discharge/conveyor devices etc.),
— gas cleaning system,
— dog house or elephant house,
— injection systems,
— electrode nippling station,
— temperature and sampling equipment,
— auxiliary equipment,
— cranes,
— transport cars for scrap baskets, steel ladles and slag pots,
— furnace transformer and high voltage system,
shall be described in the documentation. Data and safety device information, with respect to take over
points, shall be provided (see Figure B.1 and 7.4.1.2.5).
5.1.8 Ergonomic principles
5.1.8.1 General
Ergonomic principles shall be taken into account in designing EAF to reduce mental or physical stress
and strain of the operator. These principles shall be considered when allocating functions to operator
and EAF in the basic design. See EN 614-1.
All elements of an HMI such as controls, signalling or data display elements, shall be designed to be
easily understood so that clear and unambiguous interaction between the operator and EAF is possible.
See ISO 9355-1, ISO 9355-2, ISO 9355-3, and ISO 11064-1.
Particular attention shall be paid to the following:
a) Due to the process-heat the equipment for sampling and temperature measuring requires a long
balanced lever.
b) All areas where personnel have to work shall be easy to reach and easy to evacuate.
c) dedicated lifting aids or anchoring points for common lifting devices shall be provided whenever
frequent lifting or heavy tooling of machines is required;
d) eyebolts or similar aids shall be fitted to heavy components to lift them; they shall also be fitted
with handles, hand-holds or grips with a slip-resistant (e.g. knurled) surface;
e) work areas used for manual handling of components shall be so designed that they are free
of obstructions so that the operator is not hindered in his movements; the work area shall be
sufficiently spacious to handle manual loads close to the body;
f) where components require periodical maintenance, access shall be provided, according to 5.1.10;
g) slip-resistant surfaces, according to 5.1.10.5;
h) vibration protection, according to 5.1.24;
i) heat protection, according to 5.1.22.
8 © ISO 2016 – All rights reserved
ISO/DIS 13578:2016(E)
5.1.8.2 Particular ergonomic requirements during installation and maintenance
Supporting structures provided to enable machinery parts to be assembled on site shall be designed
and fabricated to ensure stability and minimize manual handling.
The positioning of electric junctions, fluid power and electrical connections and similar, can adversely
affect a workers posture during installation and subsequent maintenance. The location of such items
should be between 400 mm and 1 600 mm above the workers standing level and within the reach of the
upper limbs according ISO 13857.
The placement for handwheels, levers etc. should be between 700 mm and 1 600 mm above the workers
standing level to minimize physical effort.
5.1.9 Leakage from hydraulic system and EAF-Transformer
Pits, collectors or other means shall be provided. Measures shall be taken to prevent the ignition of the
collected leakage. Design of the pits shall include containment in the event of fire.
5.1.10 Access
5.1.10.1 Access to a danger zone shall be restricted and therefore shall be protected by guards.
Exceptions:
1) Guards preventing/hindering traffic cannot be installed on EAF working platform, because trained
personnel requires access free from obstacles to perform different operations.
2) Guards cannot be installed on ground floor in the EAF area, because trained personnel requires
access to perform different operations.
5.1.10.2 In order to allow authorized personnel safe access to and stay in areas protected by movable
interlocked guards, adequate technical safety measures shall be applied as follows:
a) access conditions
All sources of energy causing a danger inside a danger zone shall be in a safe condition (e.g.,
movements and media flows are stopped);
b) conditions for staying/working
Hazardous movements inside a danger zone shall only be permitted with a hold-to-run control device
and by using an enabling button and if necessary at reduced speed;
5.1.10.3 Access to EAF control room, control desks, underground areas, inspection and service floors
shall be in accordance with ISO 13857, ISO 14122-1 to ISO 14122-4.
5.1.10.4 Guard-rails shall be in accordance with ISO 14122-3.
5.1.10.5 Surfaces of walkways and stairs shall have slip-resistant surfaces according ISO 14122-3.
5.1.10.6 Accessible rotating/moving parts like drive shafts, couplings, belts and chains, pulleys and
sprockets, i.e., where the safety distances in ISO 13857 cannot be met, shall be guarded in accordance with
ISO 14120. Rotating shafts should be marked so that it is visually evident when the shafts are in motion.
5.1.10.7 Safety signs shall be in accordance with 5.1.21.2.
5.1.10.8 Where the risk of electric shock exists, access (e.g. on furnace roof/gantry, see Table 1, 5.2.2.2)
during power-on shall be prevented.
ISO/DIS 13578:2016(E)
5.1.11 Safety related control system
Safety related controls shall be selected in accordance with the risk assessment and as described in
ISO 13849- series.
In cases where the supporting data for documentary proof of reliability/performance from the
manufacturer of such a component is not available the fulfilment of category 3 is mandatory where
PLr = d.
Wherever it is necessary to use SIL certified equipment in accordance to IEC 61511-1, for safety-systems
in accordance to ISO 13849, the following procedure should be used:
a) By selecting the lambda values (λd, λdd, etc.), given in the safety data sheet of the equipment, the
probability of dangerous failure per hour (PFHd) shall be calculated, considering the hardware
fault tolerance as well as the system architecture, given in 6.7.8.2 of IEC 62061 Edition 1.2:2015.
b) With the calculated value the corresponding performance level shall be selected by using Table 3 of
ISO 13849-1/A1:2013.
5.1.12 Danger zone
For areas with residual risk of ignition, toxic effects, gas/dust accumulation or suffocation, Information
for use shall specify specific actions (e.g. fresh air exchange, removal of dust, PPE).
For areas with the risk of unexpected flame propagation or splashing of molten material the Information
for use shall specify specific actions.
In case of access to lower floor levels (e.g. pit, tank, closed room) Information for use shall specify
specific instructions.
5.1.13 Blocking device for tilting platform
The tilting platform of the EAF shall be blocked in horizontal position in case of gantry movements. In
case of using the tilting cylinder as blocking device a check valve shall be fixed directly to the tilting
cylinder(s). Status (position) of blocking devices shall be signalled to the operator.
5.1.14 Gantry movement
Prior to gantry movement the following interlocks shall be provided by a safety control system
according to ISO 13849-1/A1:
a) tilting platform locked in horizontal position;
b) electrodes locked and in a position higher than the upper shell;
c) roof locked in upper position;
d) gantry unlocked;
e) EAF power supply switched off.
The positions of the equipment above shall be monitored.
5.1.15 Loss of energy
In case of loss of energy (hydraulic, pneumatic, electric) all furnace components, especially shell, roof
and electrode shall go into stable position by manual operation without supply of external energy.
Provisions, e.g. a nitrogen accumulator shall be provided to move the tilting platform into horizontal
position.
10 © ISO 2016 – All rights reserved
ISO/DIS 13578:2016(E)
Where necessary, emergency cooling water shall be provided.
Where necessary, an emergency power supply shall be provided.
In case of re-supply of energy after interruption, any uncontrolled re-start shall be avoided, see
ISO 14118.
5.1.16 Electrode clamp
The electrodes shall be clamped mechanically by spring force.
Unintentional opening of the electrode clamp shall be avoided.
To activate the release of the clamp, the furnace breaker shall be switched-off and interlocked, e.g., by
a key switch. To avoid unintentional opening the interlock shall be used to operate the clamp release.
5.1.17 EAF control room
Visual displays shall be so arranged that they are free of reflections and unambiguous to identify.
Good view from the operators’ position to the EAF shall be ensured (direct or using CCTV).
The operators’ position shall be designed that frequently used controls are located in a zone of comfort
reach. Occasionally used controls can be located in a zone of reach.
The EAF control room shall be:
a) air conditioned;
b) thermal insulated;
c) noise protected;
d) equipped with heat reflecting windows;
e) equipped with special coloured glass areas to protect operators eyes against high radiation
light (arc);
f) protected against external impact by, e.g., slag and steel splashes;
g) positioned away from high current system.
5.1.18 Local control stand
A local control stand shall be in accordance with IEC 60204-1 Edition 5.1.
The local control stand (i.e. a temporary work place) shall be protected against radiated heat, external
impact (e.g., by slag and steel splashes), dust, if necessary.
5.1.19 Portable wireless control box
A portable wireless control box (i.e., a temporary work place) shall be in accordance with 9.2.7 of
IEC 60204-1 Edition 5.1:2009.
5.1.20 Personal protective equipment (PPE)
The manufacturer shall give instruction in the information for use manual (see 7.4.1.1) on the required
type of personal protective equipment.
ISO/DIS 13578:2016(E)
5.1.21 Warnings
5.1.21.1 Visual and audible danger signals
a) audible warning signals shall be in accordance with ISO 7731;
b) general requirements, design and testing of visual danger signals shall be in accordance with
ISO 11428;
c) system of auditory and visual danger and information signals shall be in accordance with ISO 11429;
d) electrical requirements for visual, acoustic and tactile signals shall be in accordance with
IEC 61310-1;
e) electrical requirements for indication, marking and actuation shall be in accordance with
IEC 61310-2;
f) electrical requirements for the location and operation of actuators shall be in accordance with
IEC 61310-3;
The Information for use shall contain instructions for maintenance of such devices, see 7.4.2 g).
5.1.21.2 Safety signs
a) safety signs shall be in accordance with ISO 7010,
b) design principles for safety signs shall be in accordance with ISO 3864-1,
c) design principles for product safety labels shall be in accordance with ISO 3864-2,
d) design principles for graphical symbols for use in safety signs shall be in accordance with
ISO 3864-3,
e) safety way guidance systems (i.e. possibility of escape) shall be in accordance with ISO 16069.
5.1.22 Surface temperatures and heat radiation
Surfaces outside restricted areas which are accessible and could be touched shall have temperatures
not exceeding the burn threshold for contact time and material specified in ISO 13732-1. Where these
limits cannot be kept, additional technical measures shall be applied, e.g., isolation, distance guard.
These measures shall be supplemented by warning instructions and wearing of PPE, if necessary.
5.1.23 Noise
5.1.23.1 Noise reduction at source by design
When designing a machine, technical measures for reducing noise at source at the design stage shall be
considered according to ISO 11688-1.
Examples for general measures which should be considered are:
— reduce power of impact (e.g., by attenuated impact);
— reduce oscillation amplitude or vibration frequency (e.g., by reducing unbalance, increasing mass);
— reduce noise of gas flow (e.g., sound absorbers);
— use materials with high internal damping (e.g., cast instead of steel plate structures, sandwich plate).
12 © ISO 2016 – All rights reserved
ISO/DIS 13578:2016(E)
Noise emission from electric arc furnaces is particularly high during charging of scrap and melt
down procedure. No technical measures are known to reduce the noise at the source during melting
procedure.
NOTE ISO 11688-2 gives useful information on noise generation mechanisms in machinery.
5.1.23.2 Noise reduction by protective measures
An EAF control room shall be provided to protect the operators.
NOTE An elephant house or a dog house can be used to reduce noise propagation
According to the risk assessment, protective measures shall be provided, e.g.,
— enclosures;
— screens;
— silencers;
— increased distance between source and EAF control room.
NOTE The efficacy of such protective measures can be estimated, e.g. by using ISO 11546- series (for
enclosures), ISO 11691 and ISO 11820 (for silencers) and ISO 11821 (for screens).
5.1.23.3 Noise reduction by information
If noise reductions at source and/or by protective measures are not sufficient further protection of the
operator is necessary, e.g. use of hearing protection, see 7.4.1.1 e).
Special consideration shall be given to noise reduction by air-borne noise absorption (e.g. sound
absorbing material lining on room surfaces).
5.1.24 Vibrations
Vibrations shall be considered at the design stage, see EN 1299.
Harmful hand-arm vibration at EAF during the process is not expected.
Where the risk of whole-body vibration exists, measurement shall be made, see EN 14253.
5.1.25 Special requirements for explosion prevention and protection
Where combustible dusts or flammable gases necessary for or produced by the melting process
may create potentially explosive atmospheres external to the furnace vessel, the following specific
requirements shall apply.
Risk assessment of hazardous situations leading to explosion and design and construction measures
appropriate for the required safety shall be implemented. For details about basic concept and
methodology of explosion prevention and protection, see EN 1127-1. For ignition hazard assessment of
non-electrical equipment, see 5.2 of EN 13463-1:2009.
NOTE If the ignition hazard assessment ensures that the equipment does not contain any effective i
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