SIST EN 791:2000+A1:2009

SLOVENSKI STANDARD
SIST EN 791:2000+A1:2009
01-maj-2009
Vrtalna oprema - Varnost
Drill rigs - Safety
Bohrgeräte - Sicherheit
Appareils de forage - Sécurité
Ta slovenski standard je istoveten z: EN 791:1995+A1:2009
ICS:
25.080.40 Vrtalniki Drilling machines
91.220 Gradbena oprema Construction equipment
SIST EN 791:2000+A1:2009 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 791:2000+A1:2009

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SIST EN 791:2000+A1:2009


EUROPEAN STANDARD
EN 791:1995+A1

NORME EUROPÉENNE

EUROPÄISCHE NORM
February 2009
ICS 91.220 Supersedes EN 791:1995
English Version
Drill rigs - Safety
Appareils de forage - Sécurité Bohrgeräte - Sicherheit
This European Standard was approved by CEN on 1 July 1995 and includes Amendment 1 approved by CEN on 20 December 2008.

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 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 Management Centre has the same status as the
official versions.

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






EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 791:1995+A1:2009: E
worldwide for CEN national Members.

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SIST EN 791:2000+A1:2009
EN 791:1995+A1:2009 (E)
Contents Page
Foreword .5
Introduction .6
1 Scope .6
2 Normative references .8
3 Definitions .9
4 List of hazards . 12
5 Safety requirements and measures . 13
5.1 General safety requirements . 13
5.1.1 Intended use of the drill rig . 13
5.1.2 Ergonomics . 13
5.1.3 Hot and cold surfaces and sharp edges . 13
5.1.4 Ventilating ports. 13
5.1.5 Hoses, pipes and fittings under pressure . 13
5.1.6 Materials . 13
5.1.7 Handling of the drill rig and its parts . 13
5.1.8 Access to operating positions and servicing points . 14
5.1.9 Isolation of energy sources . 14
5.2 Driving, tramming and operating position . 14
5.2.1 General . 14
5.2.2 Operator's position . 14
5.2.3 Underground drill rigs . 15
5.2.4 Visibility . 15
5.3 Controls, functions, systems . 15
5.3.1 General . 15
5.3.2 Starting . 15
5.3.3 Stopping . 16
5.3.4 Failure of the power supply . 16
5.3.5 Failure in a control circuit . 16
5.4 Control devices . 17
5.4.1 General . 17
5.4.2 Emergency stop and safety devices . 17
5.4.3 Verification . 18
5.5 Stability . 18
5.5.1 General stability criteria . 18
5.5.2 Definitions for stability calculations . 18
5.5.3 Verification of stability . 24
5.5.4 Ground pressure, calculation for crawler mounted drill rigs . 26
5.6 Carrier brakes . 28
5.6.1 General . 28
5.6.2 General requirements for wheel mounted drill rigs . 28
5.6.3 Service braking system for wheel mounted drill rigs . 28
5.6.4 Secondary braking system for wheel mounted drill rigs . 29
5.6.5 Parking braking system for wheel and crawler mounted drill rigs . 29
5.6.6 The service, secondary and parking braking systems on crawler mounted drill rigs . 29
5.6.7 Braking systems for "skid steer" wheel mounted drill rigs . 29
5.6.8 Verification . 29
5.7 Protection against moving parts . 30
5.7.1 General . 30
5.7.2 Transmission parts . 30
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EN 791:1995+A1:2009 (E)
5.7.3 Moving parts involved in the working process . 30
5.8 Electrical installations . 31
5.8.1 Electric power installation . 31
5.8.2 Battery installation . 32
5.9 Hydraulic installations . 32
5.10 Pneumatic installations . 32
5.11 Lighting. 32
5.11.1 Working light . 32
5.11.2 Illumination when tramming . 33
5.12 Fire protection . 33
5.12.1 General . 33
5.12.2 Fire extinguishers . 33
5.12.3 Installation of fire extinguishers . 33
5.13 Noise and vibration . 34
5.13.1 General . 34
5.13.2 Noise . 34
5.13.3 Vibration . 34
5.14 Dust and gases . 34
5.14.1 Dust suppression . 34
5.14.2 Engines and engine exhausts . 34
5.15 Draw-works, winches and ropes . 35
5.15.1 General . 35
5.15.2 Safety requirements . 35
5.15.3 Winches for operating a drill rig on slopes . 36
5.16 Roller and leaf chains . 37
5.17 Masts, derricks, feed beams and working platforms . 37
5.17.1 General . 37
5.17.2 Racking and working platforms . 38
5.17.3 Personnel lift for operational work . 38
5.17.4 Movable platforms for service, maintenance and repair . 39
5.17.5 Access . 39
5.17.6 Escape systems . 39
5.18 Special requirements for remotely controlled and automated drill rigs . 39
5.18.1 Operating position . 39
5.18.2 Emergency stop . 39
5.18.3 Control system . 39
5.18.4 Fire protection . 40
5.19 Warning devices . 40
6 Verification of safety requirements/measures . 40
7 Instructions for use – Instruction handbooks . 41
7.1 Marking – Data plate . 41
7.2 Indicators. 41
7.2.1 Information indicators . 41
7.2.2 Warning signs for residual hazards . 41
7.3 Maintenance . 42
7.4 Instruction handbooks for drill rigs . 42
7.4.1 General . 42
7.4.2 Operator's instructions . 42
7.4.3 Special safety instructions in the operator's instructions . 44
7.4.4 Maintenance instructions . 45
7.4.5 Special safety instructions in the maintenance instruction . 45
7.4.6 Spare parts list . 46
Annex A (normative) Measurement of noise and vibration . 47
Annex B (normative) Instructions for the examination and checking of blocks, wire ropes and
chains . 49
Annex C (normative) Brake test for drill rigs excluding truck and tractor mounted drill rigs . 50
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EN 791:1995+A1:2009 (E)
Annex D (normative) Hazards related to operation modes of drill rigs . 53
Annex E (informative) Symbols and signs . 55
Annex F Bibliography . 68
Annex ZA (informative) !Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC, amended by 98/79/EC" . 69
Annex ZB (informative) !Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC" . 70

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SIST EN 791:2000+A1:2009
EN 791:1995+A1:2009 (E)
Foreword
This document (EN 791:1995+A1:2009) has been prepared by CEN/TC 151 “Construction equipment and
building material machines - Safety”, 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 2009, and conflicting national standards shall be withdrawn at
the latest by December 2009.
This document has been prepared under a mandate given to CEN by the Commission of the European
Communities and the European Free Trade Association, and supports the essential requirements of
EC Directive(s).
This document includes Amendment 1, approved by CEN on 2008-12-20.
This document supersedes EN 791:1995.
The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ".
!For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this
document."
This standard is a type C-standard in the structure of A-/B-/C-standards as defined in EN 292.
The Annex A is normative and contains "Measurement of noise and vibration", the Annex B is normative and
contains "Instructions for the examination and checking of blocks, wire ropes and chains", the Annex C is
normative and contains "Brake test for drill rigs excluding truck and tractor mounted drill rigs", the Annex D is
normative and contains "Hazards related to operation modes of drill rigs", the Annex D is normative and
contains "Hazards related to operation modes of drill rigs", the Annex E is informative and contains "Symbols
and signs" and the Annex F is informative and contains "Bibliography".
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.

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SIST EN 791:2000+A1:2009
EN 791:1995+A1:2009 (E)
Introduction
The extent to which hazards are covered is indicated in the scope of this standard.
In addition, machinery should comply as appropriate with EN 292 for hazards which are not covered by this
standard.
Those hazards that are relevant for all mechanical, electrical, hydraulic, pneumatic and other equipment of
machinery and that are dealt with in standards for common use are not covered by this standard.
Reference to pertinent standards of this kind is made where such standards are applicable and so far as is
necessary.
1 Scope
1.1 The general term "Drill Rig" covers several differing types of machines for use in the construction
industry, water well drilling industry, mining and quarrying, for use above ground as well as underground and
for tunnel construction. The differing tasks determine the choice of drilling method and type of machine. For
this reason there are many possible ways to separate drill rigs into different groups, e.g. in accordance with:
 The task;
 The drilling method used;
 The cutting removal method;
 The type of construction work.
The methods used for drilling can be basically differentiated in percussive and rotary drilling principles.
Percussive drilling is a method by which the hole is produced by crushing the ground or rock at the bottom
of the drill-hole by striking it with the drilling tool and removing the cuttings out of the bore-hole.
Rotary drilling is a method in which the drilling tool at the bottom of the borehole is rotated and at the same
time, a feed force is applied by a feed system or drill collar. The ground or rock at the bottom of the borehole
is crushed or cut by pressure, shear or tensile stress produced by the different drilling tools. The cuttings are
periodically or continuously removed out of the bore hole.
Rotary percussive drilling is performed by a piston striking directly on the bit (down the hole hammer drills)
or by percussive energy transmitted via a drill string to the bit. The piston is powered by either hydraulic fluid
or compressed air.
At the same time the drill bit is rotated either continuously or intermittently.
The cuttings are continuously removed out of the borehole by a flushing medium, air or fluid which is carried to
the drilling tool.
Typical examples of drill rigs covered by this standard are:
 Cable tool drill rig;
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SIST EN 791:2000+A1:2009
EN 791:1995+A1:2009 (E)
 Pile drill rigs;
 Pile top drill rig;
 Raise borer;
 Reverse circulation drill rig;
 Rotary and percussive drill rig for underground drilling;
 Rotary and percussive drill rig for surface drilling;
 Rotary drill rig with power swivel;
 Rotary spindle rig;
 Rotary drill rig for underground use.
A casing or a drilling fluid may be used to stabilize the bore hole.
Drill rigs are stationary during drilling. They may move from one place of work to another, under their own
power. Self propelled drill rigs may include those mounted on lorries, wheeled chassis, tractors, crawlers, skid
bases (pulled by winch). When drill rigs are mounted on lorries, tractors and trailers, or are wheeled based,
transportation may be carried out at higher speeds and on public roads. When designing and constructing
these units attention is drawn to regulations covering both the drill rig and traffic regulations.
The questions of safety and ergonomic criteria in this standard mainly refer to the principal work, e.g. when
the machine is stationary and drilling. In many cases the driver is also the operator of the drill rig.
1.2 This standard deals with the significant hazards pertinent to mechanized drill rigs, when used as
intended and under the conditions foreseen by the manufacturer. It specifies requirements of safety
concerning the design, construction, operation and maintenance. This standard applies to drill rigs for surface
and underground drilling in the tunnelling, mining, construction and water well drilling industries. Casing units
are also covered by this standard.
If the base of a drill rig consists of an excavator, crane, etc. it shall be covered by its own standards to the
extent the requirements of this standard are not applicable.
NOTE 1 If a drill rig operates with attachments other than those for drilling according to this standard, e.g. pile driving,
the safety standards applying to such machines shall also be complied with.
For drill rigs to be used in an explosive atmosphere (coal mining etc.) the relevant standards apply
additionally.
NOTE 2 CEN/TC 196 is preparing complementary standards for machines to be used in explosive atmospheres.
Oil and gas industry drill rigs are not covered by this standard.
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SIST EN 791:2000+A1:2009
EN 791:1995+A1:2009 (E)
2 Normative references
This European Standard incorporates, by dated or undated references, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to
this European Standard only when incorporated in it by amendment or revision. For undated references the
latest edition of the publication referred to applies.
EN 3:1975, Portable fire extinguishers.
EN 292-1:1991, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
terminology, methodology.
EN 292-2:1991, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical
principles and specifications.
EN 294:1992, Safety of machinery — Safety distances to prevent danger zones being reached by the upper
limbs.
EN 418:1992, Safety of machinery — Emergency stop equipment, functional aspects — Principles for design.
prEN 563, Safety of machinery — Temperatures of touchable surfaces — Ergonomics data to establish
temperature limit values for hot surfaces.
prEN 953, Safety of machinery — General requirements for the design and construction of guards (fixed,
movable).
prEN 954-1, Safety of machinery — Safety related parts of control systems — Part 1: General principles for
design.
prEN 982, Safety requirements for fluid power systems and components — Hydraulics
prEN 983, Safety requirements for fluid power systems and components — Pneumatics
prEN 1037, Safety of machinery — Isolation and energy dissipation — Prevention of unexpected start-up.
ENV 1070:1993, Safety of machinery — Terminology.
EN 22860:1985, Earth-moving machinery — Minimum access dimensions.
EN 23164:1985, Earth-moving machinery — Laboratory evaluations of roll-over and falling-object protective
structures – Specifications for the deflection-limiting volume.
EN 23411:1988, Earth-moving machinery – Human physical dimensions of operators and minimum operator
space envelope.
EN 50081-2:1993, Electromagnetic compatibility — Generic emission standard — Part 2: Industrial
environment.
EN 50082-2:1994, Electromagnetic compatibility — Generic immunity standard — Part 2: Industrial
environment.
EN 60204-1:1992, Electrical equipment of industrial machines — Part 1: General requirements.
ISO 2631-1:1985, Evaluation of human exposure to whole-body vibration — Part 1: General requirements.
ISO 2867:1989, Earth-moving machinery — Access systems.
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EN 791:1995+A1:2009 (E)
ISO 3449:1992, Earth-moving machinery — Falling-object protective structures — Laboratory tests and
performance requirements.
ISO 3450:1985, Earth-moving machinery — Wheeled machines — Performance requirements and test
procedures for braking systems.
ISO 3457:1986, Earth-moving machinery — Guards and shields — Definitions and specifications.
ISO 3471-1:1986, Earth-moving machinery — Roll-over protective structures — Laboratory tests and
performance requirements — Part 1: Crawler, wheel loaders and tractors, backhoe loaders, graders, tractor
scrapers, articulated steel dumpers.
ISO 3795:1989, Road vehicles and tractors and machinery for agriculture and fo
...