ISO 4529:2023

Industrial furnaces and associated processing equipment — Secondary steelmaking — Machinery and equipment for treatment of liquid steel

This document: — specifies the general safety requirements for secondary steelmaking machinery and equipment (SSME) as defined in 3.1 to treat liquid steel; — deals with all significant hazards, hazardous situations and events pertinent to SSME, when used as intended and under conditions foreseen by the manufacturer, but also includes foreseeable misuse, faults and malfunctions; — specifies the requirements to ensure the safety of persons which are to be met during the design, pre-assembly, transport, sites assembly, commissioning, operation, maintenance, decommissioning and dismantling/ disassembling of the equipment; — assumes that SSMEs are operated and maintained by adequately trained and competent personnel. Manual intervention for setting, adjustment and maintenance is accepted as part of the normal use of the equipment. This document applies to SSME involved in the treatment process of liquid steel under vacuum or atmospheric pressure and covers: — LF, ladle furnace, — VD, vacuum degassing, — VOD, vacuum oxygen decarburization, — RH (OB), Ruhrstahl Heraeus (oxygen blowing), — process related interfaces/interactions (e.g. according to design, controls) to: a) process media, b) primary and secondary gas cleaning plant, c) material handling systems, d) transfer cars for steel ladle, and e) crane and ladle. NOTE 1 Due to the variety of secondary metallurgical processes, there are other variants (e.g. VODC – vacuum oxygen decarburization converter, CAS, CAS - OB) in addition to the main processes discussed in this document. Most countries require that applicable safety requirements, specific to this equipment be implemented. This document does not cover safety requirements for the following equipment: — cranes; — transfer cars, e.g. ladle transfer cars, tank cars, maintenance cars; — fork lift trucks or other transporting equipment; — ladles; — equipment for relining and preheating in the relining area; — burners according to ISO 13577‑2 (the burner lances for RH vessels are covered by ISO 13577‑2 except for maximum main burner ignition time, see 5.2.26.2); — cleaning and treatment of dust and fume exhaust systems; — process media (e.g. air separation, boiler house, steam generation system); — material handling systems. NOTE 2 Significant hazards and hazardous situations due to transporting/positioning of heavy components, e.g. by cranes (e.g. ladles, vessels, covers) are considered in this document (see 5.2.3). This document is not applicable to SSMEs and associated equipment manufactured before the date of its publication.

Fours industriels et équipements associés — Sidérurgie secondaire — Machines et équipements pour le traitement de l'acier liquide

General Information

• Status: Published
• Publication Date: 09-Mar-2023
• ICS: 25.180.01 - Industrial furnaces in general
• ICS: 77.180 - Equipment for the metallurgical industry
• Technical Committee: ISO/TC 244 - Industrial furnaces and associated processing equipment
• Drafting Committee: ISO/TC 244/WG 7 - Safety Requirements for Steelmaking Equipment
• Current Stage: 6060 - International Standard published
• Start Date: 10-Mar-2023
• Due Date: 05-Jun-2022
• Completion Date: 10-Mar-2023

Relations

• Consolidates: ISO/TS 15311-1:2019 - Graphic technology — Print quality requirements for printed matter — Part 1: Measurement methods and reporting schema
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 4529
First edition
2023-03
Industrial furnaces and associated
processing equipment — Secondary
steelmaking — Machinery and
equipment for treatment of liquid
steel
Fours industriels et équipements associés — Sidérurgie secondaire —
Machines et équipements pour le traitement de l'acier liquide
Reference number
ISO 4529:2023(E)
© ISO 2023

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ISO 4529:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
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ISO copyright office
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Website: www.iso.org
Published in Switzerland
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ISO 4529:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 3
4 Significant hazards and risk assessment . 7
5 Safety requirements. 7
5.1 General . 7
5.2 General requirements for design and risk assessment . 8
5.2.1 General . 8
5.2.2 Design requirements . 9
5.2.3 Structural assembly . 9
5.2.4 Safety layout . 9
5.2.5 Safety devices and protective measures . 10
5.2.6 Warning devices and safety labelling . 11
5.2.7 Personal protective equipment (PPE) . 11
5.2.8 Loss of energy . 11
5.2.9 Operating stations for the SSME . 11
5.2.10 Portable wired/wireless control box .12
5.2.11 Hold-to-run control device and enabling button .12
5.2.12 Access to and presence in danger zone . 13
5.2.13 Safety related control system . 14
5.2.14 Electrical power supply. 14
5.2.15 Electrical low voltage supply. 14
5.2.16 Fluid systems carrying or containing fluids . 14
5.2.17 Harmful areas .15
5.2.18 Exchange of lances . 16
5.2.19 Surface temperatures, heat radiation . 16
5.2.20 Temperature measurement and sampling equipment . 16
5.2.21 Electrode clamp . 16
5.2.22 Electrode exchange . 16
5.2.23 Grounding of mechanical ladle furnace parts . 16
5.2.24 Emergency stop . 16
5.2.25 Fire protection . 17
5.2.26 Special requirements for explosion prevention and protection . 17
5.2.27 Ergonomics . 18
5.2.28 Vibrations . 18
5.2.29 Noise reduction as a safety requirement . 19
5.3 List of significant hazards, hazardous situations, safety requirements and/or
protective/risk reduction measures . 19
6 Verification of safety requirements and protective/risk reduction measures .40
6.1 General .40
6.2 Required verification D.40
6.3 Required verification V, M and T .40
7 Information for use .41
7.1 General requirements . 41
7.2 Warning devices and safety labelling . 42
7.3 Marking and labelling . 42
7.4 Accompanying documents . 42
7.4.1 Instructions . 42
Annex A (normative) Noise test code .46
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ISO 4529:2023(E)
Annex B (normative) Safety requirements for electrical equipment andfor safety related
control systems .50
Annex C (informative) Examples for secondary steelmaking equipment .52
Bibliography .54
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ISO 4529:2023(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 244, Industrial furnaces and associated
processing equipment.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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ISO 4529:2023(E)
Introduction
This document is a type-C standard as stated in ISO 12100.
This document is of relevance, in particular, for the following stakeholder groups representing the
market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);
— health and safety bodies (regulators, accident prevention organisations, market surveillance etc.).
Others can be affected by the level of machinery safety achieved with the means of the document by the
above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);
— machine users/employees (e.g. trade unions, organizations for people with special needs);
— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate at the drafting
process of this document.
The machinery concerned and the extent to which hazards, hazardous situations or hazardous events
are covered are indicated in the Scope of this document.
When requirements of this type-C standard are different from those which are stated in type-A or
type-B standards, the requirements of this type-C standard take precedence over the requirements of
the other standards for machines that have been designed and built according to the requirements of
this type-C standard.
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INTERNATIONAL STANDARD ISO 4529:2023(E)
Industrial furnaces and associated processing
equipment — Secondary steelmaking — Machinery and
equipment for treatment of liquid steel
1 Scope
This document:
— specifies the general safety requirements for secondary steelmaking machinery and equipment
(SSME) as defined in 3.1 to treat liquid steel;
— deals with all significant hazards, hazardous situations and events pertinent to SSME, when used as
intended and under conditions foreseen by the manufacturer, but also includes foreseeable misuse,
faults and malfunctions;
— specifies the requirements to ensure the safety of persons which are to be met during the design,
pre-assembly, transport, sites assembly, commissioning, operation, maintenance, decommissioning
and dismantling/ disassembling of the equipment;
— assumes that SSMEs are operated and maintained by adequately trained and competent personnel.
Manual intervention for setting, adjustment and maintenance is accepted as part of the normal use
of the equipment.
This document applies to SSME involved in the treatment process of liquid steel under vacuum or
atmospheric pressure and covers:
— LF, ladle furnace,
— VD, vacuum degassing,
— VOD, vacuum oxygen decarburization,
— RH (OB), Ruhrstahl Heraeus (oxygen blowing),
— process related interfaces/interactions (e.g. according to design, controls) to:
a) process media,
b) primary and secondary gas cleaning plant,
c) material handling systems,
d) transfer cars for steel ladle, and
e) crane and ladle.
NOTE 1 Due to the variety of secondary metallurgical processes, there are other variants (e.g. VODC – vacuum
oxygen decarburization converter, CAS, CAS - OB) in addition to the main processes discussed in this document.
Most countries require that applicable safety requirements, specific to this equipment be implemented.
This document does not cover safety requirements for the following equipment:
— cranes;
— transfer cars, e.g. ladle transfer cars, tank cars, maintenance cars;
— fork lift trucks or other transporting equipment;
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ISO 4529:2023(E)
— ladles;
— equipment for relining and preheating in the relining area;
— burners according to ISO 13577-2 (the burner lances for RH vessels are covered by ISO 13577-2
except for maximum main burner ignition time, see 5.2.26.2);
— cleaning and treatment of dust and fume exhaust systems;
— process media (e.g. air separation, boiler house, steam generation system);
— material handling systems.
NOTE 2 Significant hazards and hazardous situations due to transporting/positioning of heavy components,
e.g. by cranes (e.g. ladles, vessels, covers) are considered in this document (see 5.2.3).
This document is not applicable to SSMEs and associated equipment manufactured before the date of
its publication.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 3864-3, 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 4871:1996, Acoustics — Declaration and verification of noise emission values of machinery and
equipment
ISO 7000, Graphical symbols for use on equipment — Registered symbols
ISO 7731, Ergonomics — Danger signals for public and work areas — Auditory danger signals
ISO 8995-1, Lighting of work places — Part 1: Indoor
ISO 11064-1, Ergonomic design of control centres — Part 1: Principles for the design of control centres
ISO 11202, 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 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
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, Safety of machinery — Safety-related parts of control systems — Part 1: General principles
for design
ISO 13850:2015, Safety of machinery — Emergency stop function— Principles for design
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ISO 4529:2023(E)
ISO 13854, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body
ISO 13857, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and
lower limbs
ISO 14119, Safety of machinery — Interlocking devices associated with guards — Principles for design and
selection
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 and general requirements of access
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)
ISO 20816-1, Mechanical vibration — Measurement and evaluation of machine vibration — Part 1: General
guidelines
ISO 80079-36, Explosive atmospheres — Part 36: Non-electrical equipment for explosive atmospheres —
Basic method and requirements
EN 811, Safety of machinery — Safety distances to prevent danger zones being reached by the lower limbs
EN 1088, Safety of machinery — Interlocking devices associated with guards - Principles for design and
selection
EN 13463-1:2001, Non-electrical equipment for potentially explosive atmospheres — Part 1: Basic method
and requirements
IEC 60079(all parts), Explosive atmospheres
IEC 60204-1:2016, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
IEC 60519-4:2021, Safety in electroheat installations — Part 4: Particular requirements for arc furnace
installations
IEC 60730-2-5, Automatic electrical controls — Part 2-5: Particular requirements for automatic electrical
burner control systems
IEC 61310-1, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual,
acoustic and tactile signals
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100:2010 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
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ISO 4529:2023(E)
3.1
secondary steelmaking machinery and equipment
SSME
machinery and equipment for treatment of liquid steel under vacuum or atmospheric pressure
3.2
material addition equipment
equipment for storage, conveying and adding material into liquid steel
3.3
blowing equipment
equipment for blowing gas and/or powder on top or into liquid steel
EXAMPLE Chemical heating and desulphurization.
3.4
burner equipment
burner for atmospheric operation inside RH vessel
EXAMPLE To pre-heat refractory or maintain refractory temperature.
3.5
positioning equipment
equipment for positioning of components
3.6
stirring equipment
equipment for homogenisation of liquid steel
3.7
vacuum pump
equipment to reduce pressure with respect to atmospheric conditions
3.8
vacuum vessel equipment
equipment to enable a treatment of liquid steel under vacuum conditions
3.9
media handling equipment
equipment to store, supply and return process media
3.10
electrical heating equipment
electrical equipment to provide thermal energy to liquid steel
3.11
temperature measurement and sampling equipment
manual or automatic equipment for temperature measurement and taking samples of liquid steel and
slag
3.12
high-voltage switch gear
furnace breaker
device to connect and disconnect the ladle furnace to/from the electrical high voltage supply
3.13
safety layout
graphical description of plant-related equipment regarding safety
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ISO 4529:2023(E)
3.14
hazard zone
danger zone
any space within and/or around machinery in which a person can be exposed to a hazard
[SOURCE: ISO 12100:2010, 3.11]
3.15
take-over-point
point where the secondary steelmaking machinery and equipment (SSME) (3.1) is connected to incoming/
outgoing material (e.g. liquid steel), process media, electricity (e.g. power supply and communication
like input/output parameters)
Note 1 to entry: For example, ladle take-over-point: point where overhead cranes or other transport systems
deposit or remove ladles.
3.16
safeguard
guard or protective device
[SOURCE: ISO 12100:2010, 3.26]
3.17
competent personnel
person who can demonstrate a combination of knowledge and skills to effectively, efficiently, and safely
carry out specified tasks
Note 1 to entry: Competence is usually specified by activity [e.g. design, selection of equipment, installation,
operation, maintenance (3.20), testing, inspection (3.20.1), repair (3.20.3)].
3.18
authorized personnel
competent personnel (3.17) who has the permission to perform a specific task under defined
requirements on a specific equipment
3.19
trained personnel
person 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
Note 1 to entry: Background experiences are intended to be specific for the type of equipment.
3.20
maintenance
activities carried out outside the production process
3.20.1
inspection
basic checks (e.g, visual) of equipment
3.20.2
service
periodic exchange of lances, cleaning (e.g. lance), lubrication, adjustment of limit switches
3.20.3
repair
physical action taken to restore the intended function of faulty equipment
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ISO 4529:2023(E)
3.20.4
reconditioning
measure to return to the nominal condition
Note 1 to entry: Foreseeable measures can be to replace worn parts or parts having expired the foreseen
lifetime (could require dismantling/disassembling). These parts will normally meet manufacturers' original
specification.
3.20.5
functional test
checking the functionality of the exchanged or repaired parts
Note 1 to entry: It can be required to carry out adjustment work, e.g. test runs, verifying safety functions.
3.21
alloying material
ferrous and/or non-ferrous metallic additions
3.22
chimney effect
suction power caused by the thermal updraft of hot gases expanding
3.23
control room
main room in which the control desk and monitoring facilities for a secondary steelmaking machinery
and equipment (SSME) (3.1) are located
Note 1 to entry: It is a location where operating personnel is required permanently during the production
process.
3.24
local control stand
control units usually situated adjacent to the equipment
Note 1 to entry: It is a location where operating personnel is required temporarily during the production process.
3.25
portable control box
mobile control units connected to the control system, wired or wireless
Note 1 to entry: For example, to position equipment more precisely.
3.26
ignition source
source of energy that initiates combustion
3.27
manual control
control device which is manually operated
3.27.1
hold-to-run control
control device which initiates and maintains machine functions only as long as the manual control
(3.27) (actuator) is actuated
Note 1 to entry: Release of the button/device stops the function (e.g. movement) immediately.
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ISO 4529:2023(E)
3.28
operating mode
state of the control system allowing to operate the secondary steelmaking machinery and equipment
(SSME) (3.1) under defined conditions
Note 1 to entry: Such conditions (modes) could include production, safe stop, enabling, adjustment, inspection.
Note 2 to entry: The safety level of the operating mode(s) is defined as result of the risk assessment.
3.29
slack rope and overload protection
device to detect slack rope and overload of winch systems
3.30
manufacturer
natural or legal person declared as responsible for compliance with the requirements of the design
and/or manufacturing of machinery
Note 1 to entry: The process of design and construction of machinery may involve several individuals or
companies, but one is declared as the manufacturer.
3.31
material handling system
equipment for storage, conveying and adding bulk material
4 Significant hazards and risk assessment
All the significant hazards, hazardous situations and events, as far as they are dealt with in this
document, identified by risk assessment as significant for this type of machinery and which require
action to eliminate or reduce the risk are listed in columns 1 and 2 of Table 1.
In addition, the manufacturer shall carry out a plant-related risk assessment, including interfaces to
auxiliary equipment, according to ISO 12100:2010, Clause 4 to identify any other significant hazard
of the machine/equipment. Significant hazards identified in this plant-related risk assessment but not
dealt with in this document shall be reduced by applying the principles of ISO 12100.
5 Safety requirements
5.1 General
The manufacturer of SSMEs shall take into account that different life cycle phases have to be considered
with regard to safety and the need for risk reduction. In general, the following life cycle phases are
common for SSMEs (see Figure 1).
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ISO 4529:2023(E)
Key
c
1 design, manufacturing and installation by the On site assembly.
manufacturer
d
2 handover to and putting into service (first use for Testing and commissioning.
its intended purpose) by the operator
e
3 operation Normal operation (production, intended use)
i
...