EN ISO 23779:2025

SLOVENSKI STANDARD
01-april-2025
Stroji za peskanje - Varnostne in okoljske zahteve (ISO 23779:2024)
Shot blasting machinery - safety and environmental requirements (ISO 23779:2024)
Strahlanlagen - Sicherheits- und Umweltanforderungen (ISO 23779:2024)
Équipements de grenaillage - Prescriptions de sécurité et de l'environnement (ISO
23779:2024)
Ta slovenski standard je istoveten z: EN ISO 23779:2025
ICS:
13.110 Varnost strojev Safety of machinery
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.

EN ISO 23779
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 77.180; 13.110 Supersedes EN 1248:2001+A1:2009
English Version
Shot blasting machinery - Safety and environmental
requirements (ISO 23779:2024)
Équipements de grenaillage - Exigences de sécurité et Strahlanlagen - Sicherheits- und Umweltanforderungen
d'environnement (ISO 23779:2024) (ISO 23779:2024)
This European Standard was approved by CEN on 3 October 2024.

CEN 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 CEN-CENELEC Management Centre or to any CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23779:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of EU Directive 2006/42/EC aimed to be covered . 4

European foreword
This document (EN ISO 23779:2025) has been prepared by Technical Committee ISO/TC 306 "Foundry
machinery" in collaboration with Technical Committee CEN/TC 202 “Foundry machinery” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2025, and conflicting national standards shall
be withdrawn at the latest by August 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 1248:2001+A1:2009.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 23779:2024 has been approved by CEN as EN ISO 23779:2025 without any modification.

Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of EU Directive 2006/42/EC aimed to be covered
This European Standard has been prepared under a Commission’s standardization request „M/396
Mandate to CEN and CENELEC for Standardisation in the field of machinery“ to provide one voluntary
means of conforming to essential requirements of Directive 2006/42/EC of the European Parliament
and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast).
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding essential requirements
of that Directive and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and Annex I of Directive
2006/42/EC
The relevant Essential Requirement of Directive Clause(s)/ subclause(s) Remarks/Notes
of this EN
1.1.2 (a) 5, 8
1.1.2 (c) 5, 8
1.1.2 (d) 5, 8
1.1.2 (e) 5, 8
1.1.3 Materials and products 5.7, 5.8, 5.11, 5.15
1.1.7 Operating positions  not covered
1.2.1 Safety and reliability of control systems 5.5, 5.6
1.2.3 Starting 5.5, 5.8
1.2.4.3 Emergency Stop 5.4, 5.8
1.2.4.4 Assembly of machinery 5.5, 5.16
1.2.5 Selection of control or operating modes 5.5, 5.8
1.2.6 Failure of the power supply 5.5, 5.10
1.3.3 Risks due to falling or ejected objects 5.6, 5.7, 5.8, 5.9
1.3.4 Risks due to surfaces, edges or angles  not covered
1.3.7 Risks related to moving parts 5.8, 5.9, 5.11
1.3.8.1 Moving transmission parts 5.6
1.3.8.2 Moving parts involved in the process 5.8, 5.9, 5.11
1.3.9 Risks of uncontrolled movements 5.7, 5.10
1.4.2.1 Fixed guards 5.2, 5.8, 5.9
1.4.2.2 Interlocking movable guards 5.2, 5.8, 5.9
1.5.1 Electricity supply 5.3
The relevant Essential Requirement of Directive Clause(s)/ subclause(s) Remarks/Notes
of this EN
1.5.2 Static electricity 5.13
1.5.3 Energy supply other than electricity 5.7
1.5.6 Fire 5.15
1.5.7 Explosion 5.15
1.5.8 Noise 5.14, Annex B
1.5.13 Emissions of hazardous materials and substances  Not covered
1.5.14 Risk of being trapped in a machine 5.8
1.5.15 Risk of slipping, tripping or falling 5.8
1.6.1 Machinery maintenance 5.8
1.6.2 Access to operating positions and servicing points 5.8
1.7.1 Information and warnings on the machinery 5.8
1.7.1.1 Information and information devices 5.1
1.7.1.2 Warning devices 5.1, 5.8
1.7.2 Warning of residual risks 5.8, 5.11, 5.12, 5.15
1.7.3 Marking of machinery 8.3
1.7.4 Instructions 8.1
1.7.4.1 General principles for the drafting of instructions 8.1
1.7.4.2 Contents of the instructions 5.6, 5.7, 5.8, 5.11, 5.12, 5.13,
5.15, 8.1, 8.2.1, 8.2.2, 8.2.3,
Annex B
1.7.4.3 Sales literature  not covered
WARNING 1 Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
International
Standard
ISO 23779
First edition
Shot blasting machinery — Safety
2024-10
and environmental requirements
Équipements de grenaillage — Exigences de sécurité et
d'environnement
Reference number
ISO 23779:2024(en) © ISO 2024
ISO 23779:2024(en)
© ISO 2024
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
or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 23779:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 3
4 Significant hazards, environmental impact and energy usage . 4
4.1 General .4
4.2 Significant hazards .4
4.3 Environmental impact and energy usage .5
5 Safety requirements, protective measures, risk reduction measures . 5
5.1 General .5
5.2 Guards and doors .5
5.3 Electrical equipment .5
5.4 Emergency stop .5
5.5 Control systems .5
5.6 Wheel blaster .6
5.7 Air blaster .7
5.8 Blasting chamber .8
5.9 Shot blasting media transport and recovery system .11
5.10 Power and driving devices . 12
5.11 Loading and unloading systems for workpieces . 12
5.12 Wear related hazards . 13
5.13 Static electricity.14
5.14 Noise .14
5.14.1 Measures for reducing noise at source at the design stage .14
5.14.2 Noise emission measurement and declaration . 15
5.15 Substances . 15
5.16 Integration with external equipment .17
6 Energy-efficiency and reduction of environmental impact .18
6.1 General .18
6.2 Acquisition .18
6.3 Production .18
6.4 Use .18
6.4.1 Input .18
6.4.2 Output .19
6.5 End of life .19
7 Verification of the safety requirements and/or measures . 19
8 Information for use .20
8.1 General . 20
8.2 Instruction handbook. 20
8.2.1 Information related to installation . 20
8.2.2 Information related to operation. 20
8.2.3 Information related to maintenance . 20
8.3 Marking .21
Annex A (informative) Figures of shot blasting machinery .22
Annex B (normative) Noise test code .25
Annex C (informative) Interfaces of shot blasting machinery to ancillary machinery .30
Bibliography .31

iii
ISO 23779:2024(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 306, Foundry machinery, in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/TC 202, Foundry machinery,
in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
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.

iv
ISO 23779:2024(en)
Introduction
This document is a type C standard as stated in ISO 12100:2010 and also deals with aspects of environmental
impact and energy efficiency.
The design, the construction and the actual operation of shot blasting machinery affects aspects of safety,
energy usage and environmental impact. It is essential to minimize energy usage and environmental impact
while achieving the safety requirements given in this document.
The machinery concerned and the extent to which hazards, hazardous situations and hazardous 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 preventative measure is given in the text, this should not be considered as
the only possible solution. Other solutions can be used as far as they fulfil correctly the criteria expressed in
the requirement.
This document assumes that the shot blasting machinery is operated and maintained by trained personnel.

v
International Standard ISO 23779:2024(en)
Shot blasting machinery — Safety and environmental
requirements
1 Scope
This document specifies safety and environmental requirements for shot blasting machinery.
Shot blasting machinery includes:
— wheel blasting machinery;
— air blasting machinery for dry and wet blasting;
— combined wheel and air blasting machinery.
NOTE Annex A illustrates examples of shot blasting machinery.
This document is applicable to:
— all significant hazards, hazardous situations and hazardous events relevant to shot blasting machinery,
when used as intended and under the conditions foreseen by the manufacturer, including reasonably
foreseeable misuse;
— measures for minimization of environmental impact and energy usage of shot blasting machinery.
Interfaces between shot blasting machinery and other equipment used in shot blasting but not in the scope
of this document are:
— mechanical and electrical interface to external workpiece transport system;
— connector to electrical energy supply;
— connector to fresh air supply ducting;
— connector to exhaust air ducting;
— connector to pressurized air supply;
— connector to water supply;
— connector to waste water system;
— interface for safe exchange of control signals;
— connector for fresh air supply for respiratory protection device (in blast rooms).
NOTE Annex C gives an illustration of interfaces between shot blasting machinery and other equipment used in
shot blasting but not in the scope of this document.
The specific significant risks related to mobile and movable shot blasting machinery (e.g. shot blasting
machines designed for operation at changing locations) are not dealt with in this document.
This document does not apply to:
— high pressure water jet machinery;
— dry-ice blasting machinery.
ISO 23779:2024(en)
This document does not apply to shot blasting machines manufactured before the date of its publication as
an ISO standard.
NOTE The requirements specified in this document can serve as a guideline for a risk assessment of shot blasting
machines manufactured before the date of its publication as an ISO standard.
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 3743-1:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources using
sound pressure — Engineering methods for small movable sources in reverberant fields — Part 1: Comparison
method for a hard-walled test room
ISO 3744:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources using
sound pressure — Engineering methods for an essentially free field over a reflecting plane
ISO 3746:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources using
sound pressure — Survey method using an enveloping measurement surface over a reflecting plane
ISO 3864-1:2011, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for safety
signs and safety markings
ISO 4413:2010, Hydraulic fluid power — General rules and safety requirements for systems and their components
ISO 4414:2010, 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 7000:2019, Graphical symbols for use on equipment — Registered symbols
ISO 7731:2003, Ergonomics — Danger signals for public and work areas — Auditory danger signals
ISO 10218-2:2011, Robots and robotic devices — Safety requirements for industrial robots — Part 2: Robot
systems and integration
ISO 11201:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission sound
pressure levels at a work station and at other specified positions in an essentially free field over a reflecting
plane with negligible environmental corrections
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 11204:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission sound
pressure levels at a work station and at other specified positions applying accurate environmental corrections
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13849-1:2023, 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
ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and
lower limbs
ISO 14119:2013, Safety of machinery — Interlocking devices associated with guards — Principles for design and
selection
ISO 23779:2024(en)
ISO 14120:2015, Safety of machinery — Guards — General requirements for the design and construction of fixed
and movable guards
ISO 14122-2:2016, Safety of machinery — Permanent means of access to machinery — Part 2: Working platforms
and walkways
ISO 14122-3:2016, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs, stepladders
and guard-rails
ISO 80079-36:2016, Explosive atmospheres — Part 36: Non-electrical equipment for explosive atmospheres —
Basic method and requirements
IEC 60204-1:2016, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
IEC 60079-0:2017, Explosive atmospheres — Part 0: Equipment — General requirements
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/
3.1
external workpiece transport system
system that transports the workpiece to or from the shot blasting machine
3.2
internal workpiece transport system
system that transports the workpiece within the shot blasting machine
3.3
wheel blaster
device which accelerates the shot blasting media by a rotating wheel with blades
3.4
air blaster
assembly consisting of a nozzle and connected hose(s) or tube(s), which accelerates the shot blasting media
by pressurized air
3.5
accessible blasting chamber
blasting chamber which, by designated use, is designed to be entered by personnel
3.6
workspace
workplace for the operator as specified by the manufacturer of the shot blasting machine
3.7
interior workspace
workspace inside of a shot blasting machine
3.8
screw conveyor
device that uses a rotating helical blade to move shot blasting media, horizontally or at a slight incline
3.9
belt conveyor
endless belt between two, or more, pulleys to move shot blasting media or products, horizontally or incline

ISO 23779:2024(en)
3.10
vibrating conveyor
device that transports shot blasting media or products by vibration and gravity
3.11
scraper conveyor
device to transport bulk shot blasting media over a plane with the help of scrapers
3.12
hopper
container for storing shot blasting media or for providing or replenishing shot blasting media for the shot
blasting process
3.13
bucket elevator
continuous conveyor that uses a series of bucket shaped hoppers uniformly fixed on the endless circular
traction component to vertically lift shot blasting media
3.14
hopper discharge conveyor
mechanical device, screw conveyor, belt conveyor or other suitable transport system, to feed shot blasting
media from the hopper to the shot blasting machine
3.15
switch valve
electrical, pneumatical or magnetical operated device for closing or opening the shot blasting media flow to
the shot blasting process
3.16
magnetic separator
system, mostly operating with partial magnetic drums, where a ferromagnetic- and non-ferromagnetic
mixture is separated to obtain reusable shot blasting media for the shot blasting process
3.17
cleaning system
device to separate small particles from shot blasting media, to obtain a required grain size distribution,
mostly combined with a sieve for separating large particles
4 Significant hazards, environmental impact and energy usage
4.1 General
The variety of machinery could not be covered in all details in a standard. To deal with this fact, an individual
risk assessment of the machinery in question shall be carried out considering the safety requirements of
this document.
Significant hazards identified in the individual risk assessment but not dealt with in this document shall be
avoided or reduced by applying the principles of ISO 12100:2010.
Safety requirements described in different clauses of this document shall be considered together if they are
referring to the same hazard zone.
4.2 Significant hazards
Clause 5 gives requirements to prevent or minimise all hazards, hazardous situations and events identified
by risk assessment as significant for this type of machinery.
See ISO 12100:2010 for measures against hazards that are relevant but not significant for this machine type.
NOTE ISO 12100:2010 contains information for the procedure of risk assessment.

ISO 23779:2024(en)
4.3 Environmental impact and energy usage
Clause 6 contains measures for minimization of:
— environmental impact and
— energy usage.
5 Safety requirements, protective measures, risk reduction measures
5.1 General
Shot blasting machinery shall comply with the safety requirements and/or protective measures against the
significant hazards given in Clause 5.
Warning devices and safety signs shall be in accordance with ISO 3864-1:2011, ISO 7000:2019 or
ISO 7731:2003.
5.2 Guards and doors
All potential accesses to hazardous areas shall be secured by guards in accordance with ISO 13857:2019,
ISO 14120:2015 and ISO 14119:2013. If access to a work area is limited by interlocking movable guards (e.g.
doors), these shall be secured by the safety-related control system according to the performance level given
in Table 1.
5.3 Electrical equipment
Electrical equipment of shot blasting machinery shall comply with IEC 60204-1:2016.
5.4 Emergency stop
Emergency stop devices shall comply with ISO 13850:2015.
5.5 Control systems
Safety related control systems shall be designed according to ISO 13849-1:2023. This applies also for input
and processing of safety related parameters (e.g. operating parameters).
Table 1 — Required performance level (PLr) for control systems of shot blasting machinery
Safety function Clause PLr
Guard locking of access points of wheel blasters by interlock- 5.2 d
ing movable guards associated with an interlocking device 5.6, Table 2, row 1
interlocked with the hazardous movement and a guard locking 5.6, Table 3, row 1
device
Guard locking of access points of wheel blasters by fixed guards 5.2 c
associated with an interlocking device interlocked with the 5.6, Table 2, row 1
hazardous movement 5.6, Table 3, row 1
Guard locking of access to the blasting chamber of wheel blast- 5.2 d
ing machines without additional safety measures 5.6, Table 2, row 2
5.6, Table 3, row 1
Guard locking of access to the blasting chamber of wheel blast- 5.2 c
ing machines with additional safety measures 5.6, Table 2, row 2
5.6, Table 3, row 1
Maximum overrun time of hold-to-run nozzle control device 5.7, Table 4, row 4 d

ISO 23779:2024(en)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Safety function Clause PLr
Interlocking of means of access with the shot blasting process 5.2 c
and hazardous movement of parts, for blasting chambers with- 5.8, Table 5, row 2, sub-row 1
out interior workspace
If access is possible before the shot blasting process has
stopped, interlocking with guard locking is required
Interlocking of means of access with the shot blasting process 5.2 c
and hazardous movement of parts, for blasting chambers with 5.8, Table 5, row 2, sub-row 2
interior workspace
Interlocking to prevent start up of the shot blasting process 5.8, Table 5, row 3 c
Interlocking between wheel drive and air blaster 5.8, Table 5, row 3 c
Interlocking with guard locking with hazardous movement of 5.8, Table 7, row 1 c
parts 5.8, Table 7, row 2
Access to hazardous moving parts of the shot blasting media 5.9, Table 9, row 1 c
transport and recovery system
Avoid uncontrolled movement of machine parts 5.10, Table 10, row 1 c
Avoid uncontrolled movement of machine parts due to loss or 5.10, Table 10, row 2 c
reactivation of electric, pneumatic or hydraulic energy supply
Interlocking with external equipment 5.16 Individual risk
assessment
5.6 Wheel blaster
See Table 2 for significant hazards or hazardous situations concerning shearing and crushing, cutting and
severing, the related safety requirements and/or measures and the requirements for verification of these
measures.
Table 2 — Wheel blaster – Shearing and crushing, cutting and severing
Significant hazard Hazardous situation Safety requirements Verification
Shearing Access to shear traps Access points to internal rotating parts of Visual inspection
between fixed and wheel blasters shall be guarded either by Functional test
Crushing
internal rotating parts
Cutting — fixed guards associated with an
of the wheel blaster.
interlocking device interlocked with the
Severing
hazardous movement
or
— interlocking movable guards associated
with an interlocking device interlocked
with the hazardous movement and a
guard locking device.
See Table 1 for safety related controls.
The shot blasting media supply opening of Visual inspection
wheel blasters shall be guarded by fixed
guards.
Access from the inside Unauthorized access to process openings See 5.8, Table 5
of the blasting chamber of wheel blasters shall be prevented by
to shear traps between guarding with guard locking of the blasting
fixed and internal ro- chamber access (see 5.8, Table 5).
tating parts of a wheel
Additional safety measures (e.g. key locking
blaster.
the access) can reduce the PLr of the guard
locking.
See Table 1 for safety related controls.

ISO 23779:2024(en)
See Table 3 for significant hazards or hazardous situations concerning impact of accelerated shot blasting
media and parts, the related safety requirements and/or measures and the requirements for verification of
these measures.
Table 3 — Wheel blaster – Impact of accelerated shot blasting media and parts
Significant hazard Hazardous situation Safety requirements Verification
Friction or abrasion Exposure to ejected See Table 2 See Table 2
shot blasting media.
Puncture
Information on maintenance and inspection Documentation
of wheel blasters shall be given in the infor-
mation for use, see Clause 8.
Impact Exposure to ejected The housing of the wheel blaster shall with- Documentation
parts in case of wheel stand the impact of accelerated parts that
Stabbing or Punc-
blaster breakdown. can occur in the event of the collapse of the
ture
blast wheel.
Information on maintenance and inspection Documentation
of wheel blasters shall be given in the infor-
mation for use, see Clause 8.
See Table 14 for noise sources, the related noise reduction measures and the requirements for verification of
these measures.
5.7 Air blaster
See Table 4 for significant hazards or hazardous situations concerning impact of accelerated shot blasting
media and parts, the related safety requirements and/or measures and the requirements for verification of
these measures.
Table 4 — Air blaster – Impact of accelerated shot blasting media and parts
Significant hazard Hazardous situation Safety requirements Verification
Friction or abrasion Exposure to ejected The construction of the air blaster shall Visual inspection
shot blasting media, minimize wear by accelerated shot blasting Documentation
Puncture
parts and fluids in case media.
Injection
of breakdown, wear
The air blaster shall withstand the pressure Documentation
and malfunction of an
generated by the shot blasting process. Its
air blaster or an air
pressurized components (e.g. tubing, hoses,
blasting machine.
vessel, couplings, valves, nozzle) shall be
designed according to ISO 4413:2010 and ISO
4414:2010.
Information on maintenance and inspection Documentation
of air blasters shall be given in the informa-
tion for use, see Clause 8.
Impact For manual air blasters: The air blaster shall be equipped with a hold- Functional test
to-run nozzle control device which, upon
Friction or abrasion
— uncontrolled
release within 3 seconds, reduces the kinetic
Puncture movement of the
energy of the:
nozzle and hose
Injection
— the shot blasting media and
— the pressurized air
and/or
ISO 23779:2024(en)
TTabablele 4 4 ((ccoonnttiinnueuedd))
Significant hazard Hazardous situation Safety requirements Verification
— release of shot to assure:
blasting media.
— no hazardous movement of the hose;
— no hazardous ejection of shot blasting
media.
This can be achieved by e.g.:
— depressurization of the shot blasting
media supply system;
— a shutter in the supply to the nozzle.
For long hoses additional measures (e.g. pres-
sure release valve) may be required.
See Table 1 for safety related controls.
See Table 14 for noise sources, the related noise reduction measures and the requirements for verification of
these measures.
5.8 Blasting chamber
See Table 5 for significant hazards or hazardous situations concerning impact of accelerated shot blasting
media and parts, the related safety requirements and/or measures and the requirements for verification of
these measures.
Table 5 — Blasting chamber – Impact of accelerated shot blasting media and parts
Significant hazard Hazardous situation Safety requirements Verification
Friction or abrasion Exposure to accelerat- The construction of the blasting chamber Documentation
ed shot blasting media shall prevent the exposure to hazardous Functional test
Puncture
and parts in the work- accelerated shot blasting media and parts
Impact
space outside of the in the workspace outside of the blasting
blasting chamber. chamber.
Information on maintenance and inspection Documentation
shall be given in the information for use, see
Clause 8.
Friction or abrasion Exposure to accelerat- Access to blasting chambers without interior Visual inspection
ed shot blasting media workspace shall be prevented by design.
Puncture Documentation
and moving parts in
Impact
Means of access shall be interlocked with Functional test
blasting chambers
the shot blasting process and hazardous
without interior work-
movement of parts. Opening of means of ac-
space.
cess shall stop the shot blasting process and
hazardous movement of parts.
If access is possible before the shot blasting
process has stopped, interlocking with guard
locking is required.
It shall not be possible to initiate the shot
blasting process and hazardous movement
of parts, until the means of access are closed.
The shot blasting process shall not re-start
automatically upon closure of the means of
access.
The interlocking device shall comply with
ISO 14119:2013.
Robots shall be integrated according to ISO
10218-2:2011.
See Table 1 for safety related controls.

ISO 23779:2024(en)
TTabablele 5 5 ((ccoonnttiinnueuedd))
Significant hazard Hazardous situation Safety requirements Verification
Workpiece inlet and outlet openings shall Visual inspection
be secured against unauthorized access by
Measurement
measures to prevent easy access of persons
through work
...