prEN ISO 23224

Drilling and foundation equipment - Horizontal directional drilling (HDD) machines - Safety requirements and verification (ISO/DIS 23224:2025)

This document specifies the safety requirements for horizontal directional drilling (HDD) machines (hereafter referred to as HDD machines) as defined in ISO 21467:2023 which are designed primarily for drilling through the earth in a mostly horizontal direction.
This document is applicable to the following HDD machine types:
portable HDD machines;
pedestrian-controlled HDD machines;
towed HDD machines;
self-propelled HDD machines;
ride-on HDD machines;
remote-controlled tramming HDD machines;
skid-mounted HDD machines;
pit-launched HDD machines;
surface-launched HDD machines.
NOTE Some HDD machines can include a combination of types or characteristics noted above.

Geräte für Bohr- und Gründungsarbeiten - Geräte für das gerichtete Horizontalbohrverfahren (HDD) - Sicherheitsanforderungen und Überprüfung (ISO/DIS 23224:2025)

Dieses Dokument legt die Sicherheitsanforderungen für gesteuerte Horizontalbohrmaschinen fest, wie sie in ISO 21467:2023 definiert sind, die hauptsächlich für Bohrungen durch die Erde in überwiegend horizontaler Richtung ausgelegt sind.
Dieses Dokument ist für die folgenden Typen von gesteuerten Horizontalbohrmaschinen anwendbar:
   tragbare Horizontalbohrmaschinen;
   mitgängergesteuerte Horizontalbohrmaschinen;
   gezogene gesteuerte Horizontalbohrmaschinen;
   selbstfahrende gesteuerte Horizontalbohrmaschinen;
   gesteuerte Horizontalbohrmaschinen mit aufsitzendem Maschinenführer;
   ferngesteuerte Horizontalbohrmaschinen für die Bewegung auf Schienen;
   stationäre gesteuerte Horizontalbohrmaschinen;
   gesteuerte Horizontalbohrmaschinen für Schachtgruben;
   gesteuerte Horizontalbohrmaschinen für die Erdoberfläche.
ANMERKUNG   Manche gesteuerten Horizontalbohrmaschinen können eine Kombination der oben genannten Typen oder Eigenschaften aufweisen.
Dieses Dokument behandelt alle wesentlichen Gefährdungen, Gefährdungssituationen und Ereignisse, die für die gesteuerten Horizontalbohrmaschinen in seinem Anwendungsbereich relevant sind, wenn sie bestimmungsgemäß oder unter vom Hersteller vernünftigerweise vorhersehbaren Bedingungen der Fehlanwendung verwendet werden, ausgenommen Gefährdungen im Zusammenhang mit Hochspannungsbatterien, die in das Energiequellensystem integriert sind. Es definiert die geeigneten technischen Maßnahmen, um Risiken, die sich aus relevanten Gefährdungen, Gefährdungssituationen oder -ereignissen während der Inbetriebnahme, des Betriebs und der Instandhaltung ergeben, zu beseitigen oder zu verringern.
Dieses Dokument gilt nicht für Maschinen, die vor dessen Veröffentlichungsdatum hergestellt wurden.

Machines de forage et de fondation - Machines de forage horizontal dirigé (HDD) - Exigences de sécurité et vérification (ISO/DIS 23224:2025)

Oprema za vrtanje in temeljenje - Oprema za vodoravno usmerjeno vrtanje (HDD) - Varnostne zahteve in preverjanje (ISO/DIS 23224:2025)

General Information

• Status: Not Published
• Publication Date: 13-Sep-2026
• ICS: 53.100 - Earth-moving machinery
• Technical Committee: CEN/TC 151 - Construction equipment and building material machines - Safety
• Drafting Committee: CEN/TC 151/WG 3 - Drilling equipment - Safety
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 08-May-2025
• Due Date: 27-Jun-2025
• Completion Date: 08-May-2025
• Directive: 2006/42/EC - 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)
• Directive: 2023/1230 - Regulation (EU) 2023/1230 of the European Parliament and of the Council of 14 June 2023 on machinery and repealing Directive 2006/42/EC of the European Parliament and of the Council and Council Directive 73/361/EEC (Text with EEA relevance)
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Mandate: M/605 - COMMISSION IMPLEMENTING DECISION of 20.1.2025 on a standardisation request to the European Committee for Standardization and to the European Committee for Electrotechnical Standardization as regards machinery and related products in support of Regulation (EU) 2023/1230 of the European Parliament and of the Council
• Ref Project: oSIST prEN ISO 23224:2025 - Drilling and foundation equipment - Horizontal directional drilling (HDD) machines - Safety requirements and verification (ISO/DIS 23224:2025)

Relations

• Revises: EN 16228-3:2014+A1:2021 - Drilling and foundation equipment - Safety - Part 3: Horizontal directional drilling equipment (HDD)
• Effective Date: 24-Jan-2024

Overview

The prEN ISO 23224:2025 standard, titled Drilling and foundation equipment - Horizontal directional drilling (HDD) machines - Safety requirements and verification, specifies essential safety requirements for various types of HDD machines. Developed by CEN and aligned with ISO 21467:2023, this document focuses on machines designed primarily for drilling through earth in a horizontal direction. The standard covers a comprehensive range of HDD machine types including portable, towed, self-propelled, ride-on, remote-controlled, skid-mounted, pit-launched, and surface-launched units. Its primary goal is to enhance operational safety and reduce risks during HDD machine use.

Key Topics

The standard delves into numerous critical safety aspects and risk management protocols relevant to HDD machines:

• Strength and Stability
  Requirements for structural integrity, load handling, and rigid body stability calculations to prevent machine failure during operation.

• Electrical and Electrotechnical Systems
  Guidance on battery systems, electromagnetic compatibility (EMC), and ensuring electrical safety.

• Hydraulic and Pneumatic Systems
  Safety measures for hydraulic components, pneumatic systems, and pressure-bearing hoses and fittings.

• Failure Prevention
  Strategies addressing power supply failures, uncontrolled motions, and braking system effectiveness.

• Ergonomics and Operator Accessibility
  Design considerations for control stations, servicing points, and operator's position to promote safe machine handling.

• Operator Controls and Indicators
  Requirements to minimize inadvertent activation, ensure proper control function including pedals and visual displays, and controls for ride-on and pedestrian-operated machines.

• Control and Steering Systems
  Safety performance criteria, especially for remotely controlled and automated HDD machines, including stop devices and control protocol.

• Visibility and Warning Devices
  Specifications on operator field of view, lighting requirements in low light conditions, and use of warning signals to alert personnel.

• Physical Guards and Protective Devices
  Design and installation of guards around danger zones such as rotating parts, clamps, elevated drill frames, and transmission areas.

• Machine Transport and Handling
  Safety measures related to lifting, towing, and transportation of HDD machines and their components.

• Energy Source Isolation & Hazardous Surfaces
  Guidelines to isolate energy sources during maintenance and protection from hot/cold surfaces or sharp edges.

Applications

prEN ISO 23224:2025 is integral to ensuring safe operation and maintenance of HDD machinery used in various construction, civil engineering, and infrastructure projects involving underground drilling and foundation work. Applications include:

• Installation of underground pipelines, cables, and conduits without trenching.
• Foundation construction involving horizontal subsurface drilling.
• Urban infrastructure projects requiring precise, safe horizontal directional drilling.
• Remote or automated HDD operations enhancing operator safety in hazardous environments.
• Equipment manufacturing and design compliance to international safety norms.

Adhering to this standard helps reduce workplace accidents, enhances operator safety, and ensures machinery reliability across diverse HDD machine models and control systems.

Related Standards

This standard complements and references related international and regional standards to provide a comprehensive safety framework:

• ISO 21467:2023 - Defines types and classifications of HDD machines.
• ISO 12100 - General safety of machinery and risk assessment principles.
• ISO 13849 - Safety-related parts of control systems.
• ISO 4413 / 4414 - Hydraulic and pneumatic system safety.
• Relevant electromagnetic compatibility standards (EMC).
• Regional standards like EN standards for earth-moving machinery and construction equipment.

Summary

prEN ISO 23224:2025 is a vital draft international standard governing the safety requirements and verification for horizontal directional drilling machines across multiple types and control systems. It provides detailed safety criteria spanning structural integrity, operational controls, ergonomics, risk reduction, and protective features. Implementation of this standard supports safer HDD operations in foundation construction and underground works, helping manufacturers, operators, and regulators enhance risk management and compliance in this specialized heavy equipment sector.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2025
Oprema za vrtanje in temeljenje - Oprema za vodoravno usmerjeno vrtanje (HDD) -
Varnostne zahteve in preverjanje (ISO/DIS 23224:2025)
Drilling and foundation equipment - Horizontal directional drilling (HDD) machines -
Safety requirements and verification (ISO/DIS 23224:2025)
Geräte für Bohr- und Gründungsarbeiten - Sicherheit - Teil 3: Geräte für das gerichtete
Horizontalbohrverfahren (HDD) (ISO/DIS 23224:2025)
Machines de forage et de fondation - Machines de forage horizontal dirigé (HDD) -
Exigences de sécurité et vérification (ISO/DIS 23224:2025)
Ta slovenski standard je istoveten z: prEN ISO 23224
ICS:
25.080.40 Vrtalniki Drilling machines
53.100 Stroji za zemeljska dela Earth-moving machinery
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 23224
ISO/TC 195/SC 3
Drilling and foundation
Secretariat: AFNOR
equipment — Horizontal directional
Voting begins on:
drilling (HDD) machines — Safety
2025-02-13
requirements and verification
Voting terminates on:
ICS: 53.100
2025-05-08
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 23224:2025(en)
DRAFT
ISO/DIS 23224:2025(en)
International
Standard
ISO/DIS 23224
ISO/TC 195/SC 3
Drilling and foundation
Secretariat: AFNOR
equipment — Horizontal directional
Voting begins on:
drilling (HDD) machines — Safety
requirements and verification
Voting terminates on:
ICS: 53.100
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
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TO SUBMIT, WITH THEIR COMMENTS,
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NOTIFICATION OF ANY RELEVANT PATENT
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RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 23224:2025(en)
ii
ISO/DIS 23224:2025(en)
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 4
4 Safety requirements and protective/risk reduction measures . 6
4.1 General .6
4.2 Requirements for strength and stability .7
4.2.1 Loads .7
4.2.2 Structural calculations .8
4.2.3 Rigid body stability .9
4.3 Electrotechnical systems . 12
4.3.1 General . 12
4.3.2 Batteries or battery packs . 12
4.3.3 Electromagnetic compatibility (EMC) . 12
4.4 Hydraulic and pneumatic systems . 13
4.4.1 Hydraulic systems . 13
4.4.2 Pneumatic systems. 13
4.4.3 Hoses, pipes, and fittings under pressure . 13
4.5 Failure of the power supply .14
4.6 Uncontrolled motion .14
4.7 Braking systems .14
4.8 Chains .14
4.9 Ergonomics .14
4.9.1 General .14
4.9.2 Control stations and servicing points . 15
4.10 Operating position(s) . 15
4.10.1 General . 15
4.10.2 Access to operating positions, intervention, and servicing points . 15
4.10.3 Operator's station . 15
4.11 Operator’s controls and indicators .18
4.11.1 General .18
4.11.2 Inadvertent activation of control .18
4.11.3 Pedals .18
4.11.4 Uncontrolled motion .18
4.11.5 Visual displays/control panels, indicators, and symbols .18
4.11.6 Ride-on machine controls accessible from ground level .19
4.11.7 Pedestrian-controlled machine controls .19
4.12 Steering systems .19
4.13 Visibility .19
4.13.1 Operator's field of view .19
4.13.2 Lighting of the work area in darkness or non-lit conditions .19
4.14 Warning devices . 20
4.15 Control systems . 20
4.15.1 General . 20
4.15.2 Required performance levels for safety related parts of control systems . 20
4.15.3 Starting and stopping systems .21
4.16 Control devices . 22
4.16.1 General . 22
4.16.2 Protective measures for stopping of rotation and feed . 22
4.16.3 Restricted operating mode (ROM) . 22
4.16.4 Inadvertent actuation of controls . 23
4.16.5 Controls for extending the crawlers (tracks) . 23
4.17 Remotely controlled and automated HDD machines . 23

iii
ISO/DIS 23224:2025(en)
4.17.1 General . 23
4.17.2 Operating position . 23
4.17.3 Stop device(s).24
4.17.4 Control system .24
4.18 Unmanned, automatically operated HDD machines .24
4.19 Retrieval, transportation, lifting and towing of HDD machines and its parts .24
4.19.1 Common use .24
4.19.2 Retrieval/Towing .24
4.19.3 Tie-down. 25
4.19.4 Lifting points . 25
4.19.5 Transportation . 25
4.20 Isolation of energy sources . 25
4.21 Hot and cold surfaces and sharp edges. 25
4.22 Guards and protective devices . 25
4.22.1 General . 25
4.22.2 Design . . 26
4.22.3 Foot barrier . 26
4.22.4 Danger zones at rear of machine . 26
4.22.5 Elevating drill frame . 26
4.22.6 Breakout clamps . 26
4.22.7 Ground fixation device .27
4.22.8 Transmission parts .27
4.22.9 HDD machines using threaded drill string connections .27
4.22.10 Clamps and pipe/rod breaking clamps used in the drilling process .27
4.22.11 Tool handling system.27
4.23 HDD machines with a drill rod/pipe storage magazine . 28
4.23.1 General . 28
4.23.2 HDD machines equipped with mechanical drill rod/pipe handling system . 28
4.24 HDD machines without a mechanical drill rod/pipe handling system . 28
4.24.1 HDD machines with a drill rod/pipe of more than 25 kg . 28
4.24.2 HDD machines with a drill rod/pipe of 25 kg or less . 29
4.25 Falling or ejected objects . . 29
4.26 Fire prevention . 29
4.26.1 General . 29
4.26.2 Fire extinguishers . 29
4.26.3 Installation of fire extinguishers . 29
4.26.4 Fire prevention for fuel and hydraulic circuits . 30
4.27 Noise and vibration . 30
4.27.1 General . 30
4.27.2 Noise . 30
4.27.3 Vibration .31
4.28 Exhaust gases and dust .31
4.28.1 Engine exhaust .31
4.28.2 Dust .31
4.29 Maintenance .31
4.30 Immobilisation system .32
4.31 Drill frame extensions .32
4.32 Travel speed .32
5 Verification of safety requirements and/or protective risk reduction measures .32
5.1 General .32
5.2 Functional test . 35
6 Information for use .36
6.1 Markings . 36
6.1.1 General . 36
6.1.2 HDD machine data plate . 36
6.2 Indicators . 36
6.2.1 Information indicators . 36
6.2.2 Warning signs for residual hazards . 36

iv
ISO/DIS 23224:2025(en)
6.2.3 Warning devices . 36
6.3 Instruction books for HDD machines .37
6.3.1 General .37
6.3.2 Operator's manual.37
6.3.3 Maintenance instructions .41
6.3.4 Spare parts list .42
6.4 Safety labels and symbols .42
Annex A (informative) Symbols and signs .43
Annex B (informative) Noise test code . 51
Annex C (informative) Whole body and hand-arm vibration code .57
Annex D (normative) Ground pressure calculations for crawler-mounted HDD machines .58
Annex E (normative) Performance test conditions for stopping of drilling head rotation .60
Annex F (informative) List of significant hazards .62
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered .65
Annex ZB (informative) Relationship between this European Standard and the essential
requirements of Regulation EU 2023/1230 aimed to be covered .70
Bibliography . 76

v
ISO/DIS 23224:2025(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 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).
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/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 195, Building and construction machinery and
equipment, Subcommittee SC 3, Drilling and foundation machinery and 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.

vi
ISO/DIS 23224:2025(en)
Introduction
This document is a type-C standard as stated in ISO 12100:2010.
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 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.
vii
DRAFT International Standard ISO/DIS 23224:2025(en)
Drilling and foundation equipment — Horizontal directional
drilling (HDD) machines — Safety requirements and
verification
1 Scope
This document specifies the safety requirements for horizontal directional drilling (HDD) machines
(hereafter referred to as HDD machines) as defined in ISO 21467:2023 which are designed primarily for
drilling through the earth in a mostly horizontal direction.
This document is applicable to the following HDD machine types:
— portable HDD machines;
— pedestrian-controlled HDD machines;
— towed HDD machines;
— self-propelled HDD machines;
— ride-on HDD machines;
— remote-controlled tramming HDD machines;
— skid-mounted HDD machines;
— pit-launched HDD machines;
— surface-launched HDD machines.
NOTE Some HDD machines can include a combination of types or characteristics noted above.
This document deals with all significant hazards, hazardous situations, and events relevant to the HDD
machines within its scope when used as intended or under conditions of misuse reasonably foreseeable by
the manufacturer, excluded hazards related to high-voltage batteries integrated in the power source system.
It specifies the appropriate technical measures for eliminating or reducing risks arising from relevant
hazards, hazardous situations or events during commissioning, operation, and maintenance.
This document is not applicable to machines 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 2631-1:1997, Mechanical vibration and shock — Evaluation of human exposure to whole-body vibration —
Part 1: General requirements
ISO 2860:1992, Earth-moving machinery — Minimum access dimensions
ISO 2867:2011, Earth-moving machinery — Access systems
ISO 3411:2007, Earth-moving machinery — Physical dimensions of operators and minimum operator space
envelope
ISO/DIS 23224:2025(en)
ISO 3449:2005, Earth-moving machinery — Falling object protective structure — Laboratory tests and
performance requirements
ISO 3450:2011, Earth-moving machinery — Wheeled or high-speed rubber tracked machines — Performance
requirements and test procedures for brake systems
ISO 3457:2003, Earth-moving machinery — Guards — Definitions and requirements
ISO 3471:2008, Earth-moving machinery — Roll-over protective structures — Laboratory tests and performance
requirements
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 3795:1989, Road vehicles, and tractors and machinery for agriculture and forestry — Determination of
burning behaviour of interior materials
ISO 4309:2017, Cranes — Wire ropes — Care and maintenance, inspection and discard
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 5006:2017, Earth-moving machinery — Operator’s field of view — Test method and performance criteria
ISO 5010:2019, Earth-moving machinery — Wheeled machines — Steering requirements
ISO 5353:1995, Earth-moving machinery, and tractors and machinery for agriculture and forestry — Seat
index point
ISO 6011:2023, Earth-moving machinery — Visual display of machine operation
ISO 7731, Ergonomics — Danger signals for public and work areas — Auditory danger signals
ISO 6682:1986, Earth-moving machinery — Zones of comfort and reach for controls
ISO 6683:2005, Earth-moving machinery — Seat belts and seat belt anchorages — Performance requirements
and tests
ISO 6750-1:2019, Earth-moving machinery — Operator’s manual — Part 1: Contents and format
ISO 7000:2019, Graphical symbols for use of equipment — Registered symbols
1)
ISO 7010:2019 , Graphical symbols — Safety colours and safety signs — Registered safety signs
ISO 7096:2020, Earth-moving machinery — Laboratory evaluation of operator seat vibration
ISO 9244:2008, Earth-moving machinery — Machine safety labels — General principles
ISO 9533:2010, Earth-moving machinery — Machine-mounted audible travel alarms and forward horns — Test
methods and performance criteria
ISO 10263-2:2009, Earth-moving machinery — Operator enclosure environment — Part 2: Air filter element
test method
ISO 10263-4:2009, Earth-moving machinery — Operator enclosure environment — Part 4: Heating, ventilating
and air conditioning (HVAC) test method and performance
ISO 10264:1990, Earth-moving machinery — Key-locked starting systems
1) As impacted by amendments Amd1:2020, Amd2:2020, Amd3:2021, Amd4:2021, Amd5:2022, Amd6:2022,
Amd7:2023
ISO/DIS 23224:2025(en)
ISO 10265:2008, Earth-moving machinery — Crawler machines — Performance requirements and test
procedures for braking systems
ISO 10532:1995, Earth-moving machinery — Machine-mounted retrieval device — Performance requirements
ISO 10567:2007, Earth-moving machinery – Hydraulic excavators – Lift capacity
ISO 10968:2020, Earth-moving machinery — Operator’s controls
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 11203:1995, Acoustics — Noise emitted by machinery and equipment — Determination of emission sound
pressure levels at a work station and at other specified positions from the sound power level
2)
ISO 11112:1995 , Earth-moving machinery — Operator’s seat — Dimensions and requirements
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13732-1:2006, Ergonomics of the thermal environment – Methods for the assessment of human responses to
contact with surfaces – Part1: Hot surfaces
ISO 13766-1:2018, Earth-moving and building construction machinery — Electromagnetic compatibility
(EMC) of machines with internal electrical power supply — Part 1: General EMC requirements under typical
electromagnetic environmental conditions
ISO 13766-2:2018, Earth-moving and building construction machinery — Electromagnetic compatibility (EMC)
of machines with internal electrical power supply — Part 2: Additional EMC requirements for functional safety
ISO 13849-1:2023, Safety of machinery — Safety-related parts of control systems
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 reach by upper and
lower limbs
ISO 14118:2017, Safety of machinery — Prevention of unexpected start-up
ISO 14119:2024, Safety of machinery — Interlocking devices associated with guards — Principles for design and
selection
ISO 14120:2015, Safety of machinery — Guards — General requirements for the design and construction of fixed
and movable guards
ISO 15442:2012, Cranes — Safety requirements for loader cranes
ISO 15817:2012, Earth-moving machinery — Safety requirements for remote operator control systems
ISO 15818:2017, Earth-moving machinery — Lifting and tying-down attachment points — Performance
requirements
ISO 16001:2017, Earth-moving machinery — Object detection systems and visibility aids — Performance
requirements and tests
ISO 16754:2008, Earth-moving machinery — Determination of average ground contact pressure for crawler
machines
ISO 17063:2003, Earth-moving machinery — Braking systems of pedestrian-controlled machines – Performance
requirements and test procedures
2) As amended by ISO 11112:1995/Amd 1:2001

ISO/DIS 23224:2025(en)
ISO 21467:2023, Drilling and foundation machinery — Horizontal directional drilling (HDD) machines –
Commercial specifications
ISO/TR 22100-3:2016, Safety of machinery — Relationship with ISO 12100 — Part 3: Implementation of
ergonomic principles in safety standards
IEC 60204-1:2016+A1:2021, Safety of machinery — Electrical equipment of machines — Part1: General
requirements
IEC 61000-6-2:2016, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity standard
for industrial environments
IEC 61000-6-4:2018, RLV, Electromagnetic compatibility (EMC) — Part 6-4: Generic standards — Emission
standard for industrial environments
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100 and ISO 21467:2023, 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
horizontal directional drilling machine
HDD machine
machine that uses a steerable drill head attached to the end of a drill string to drill through the earth in a
mostly horizontal direction
Note 1 to entry: HDD machines typically apply force to the drill string using a drill frame parallel to or inclined up to
30° relative to the operating earth surface.
[SOURCE: ISO 21467:2023, 3.1.1 modified to remove Note 2 to entry.]
3.2
ground fixation device
device by which the HDD machine is secured to the ground
3.3
exit side
location remote from the HDD machine where the drill string exits the ground
3.4
hose track
carrier that protects, guides, and maintains proper bend radius of hydraulic hoses, electrical cables, and air
hoses during movement between the stationary and moving portion of the HDD machine
3.5
drill rod/pipe receiver
structure or a component that supports the drill rod/pipe on HDD machines that are not equipped with
mechanical drill rod/pipe loaders

ISO/DIS 23224:2025(en)
3.6
operator zone of control
visible length of the drill rod/pipe when seated in the operator's seat with a profile of 60° each side based
on the nasal binocular field of vision assuming a fixed head and fixed eyes measured from the central
position with respect to the head, but the length extends only to the inside edge of the drill rod/pipe storage
magazine and not beyond
Note 1 to entry: See Figure 1.
Key
A seat index point (as per ISO 5353:1995)
B operator zone of control
Figure 1 — Operator zone of control
3.7
operator
person controlling the HDD machine while operating
3.8
assistant
person who assists the operator with the HDD machine operations but does not control the HDD machine
Note 1 to entry: The assistant could be exposed to moving parts involved in the drilling process without having the
control on the said moving parts.
3.9
working area
area near the HDD machine in which its tools are moved in order to carry out work
3.10
danger zone
any zone within and/or around the HDD machine in which a person is exposed to risk of injury or damage
to health
Note 1 to entry: This means the area in which a person can be reached by an operational movement of the HDD machine
by any part involved in the process by swinging or falling parts, evacuated spoil or by ejected material.

ISO/DIS 23224:2025(en)
3.11
tramming
short movements of the HDD machine in operating condition on a site
3.12
travelling
moving of the HDD machine in a non-operating condition specified by the manufacturer
3.13
stabilising device
any device or system used to stabilise the HDD machine by supporting and/or levelling of the c
...