SIST EN 12621:2025

SLOVENSKI STANDARD
01-julij-2025
Naprave za dovod in obtok tekočih premaznih materialov - Varnostne zahteve
Machinery for supply and circulation of liquid coating materials - Safety requirements
Förder- und Umlaufanlagen für flüssige Beschichtungsstoffe - Sicherheitsanforderungen
Installations d'alimentation et de circulation de produits de revêtement liquide -
Prescriptions de sécurité
Ta slovenski standard je istoveten z: EN 12621:2025
ICS:
87.100 Oprema za nanašanje Paint coating equipment
premazov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 12621
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 87.100 Supersedes EN 12621:2006+A1:2010
English Version
Machinery for supply and circulation of liquid coating
materials - Safety requirements
Installations d'alimentation et de circulation de Förder- und Umlaufanlagen für flüssige
produits de revêtement liquide - Exigences de sécurité Beschichtungsstoffe - Sicherheitsanforderungen
This European Standard was approved by CEN on 22 December 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 12621:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction. 5
1 Scope . 6
2 Normative references . 8
3 Terms, definitions and symbols . 10
3.1 Terms and definitions. 10
3.2 Symbols . 12
4 Safety requirements and/or protective/risk reduction measures . 12
4.1 Mechanical . 12
4.1.1 Crushing, drawing in or impact . 12
4.1.2 Parts under pressure . 14
4.1.3 Slipping . 15
4.2 Electrical . 16
4.2.1 General . 16
4.2.2 External influences on the electrical equipment . 16
4.3 Temperature . 16
4.3.1 Hot surfaces . 16
4.3.2 Thermal stability . 17
4.3.3 Heating system . 17
4.4 Noise . 17
4.5 Hazardous substances . 18
4.5.1 General . 18
4.5.2 Health. 20
4.5.3 Fire . 20
4.5.4 Explosion . 21
4.6 Failure of energy supply . 25
4.7 Control system . 25
5 Verification of safety requirements and/or protective/risk reduction measures. 27
6 Information for use . 34
6.1 General . 34
6.2 Instructions for operation . 34
6.3 Instructions for maintenance . 35
6.4 Instructions for installation . 35
6.4.1 General . 35
6.4.2 Supply hoses for application equipment and their fittings . 36
6.4.3 Ventilation . 36
6.5 Marking . 36
6.5.1 Warning signs . 36
6.5.2 Type plate . 36
6.6 Sales literature . 36
Annex A (informative) List of significant hazards . 37
Annex B (informative) Energy-efficiency and reduction of environmental impact . 40
B.1 General . 40
B.2 Machinery. 40
Annex C (informative) Significant technical changes between this European Standard and
the previous edition . 42
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 44
Annex ZB (informative) Relationship between this European Standard and the essential
Health and Safety Requirements of Directive 2014/34/EU aimed to be covered . 47
Bibliography . 50
European foreword
This document (EN 12621:2025) has been prepared by Technical Committee CEN/TC 271 “Surface
treatment equipment - 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 2025, and conflicting national standards shall be
withdrawn at the latest by August 2026.
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 12621:2006+A1:2010.
See Annex C, Table C.1 for the technical modifications which have been made in comparison with
EN 12621:2006+A1:2010.
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 Annexes ZA and ZB, which are an integral part
of this document.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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.
Introduction
This document is a type-C standard as stated in EN ISO 12100:2010.
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 organizations, 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);
— service providers, e.g. for maintenance (small, medium and large enterprises).
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.
1 Scope
This document deals with all significant hazards, hazardous situations and events which are relevant to
machinery for supply and circulation of liquid coating material, when used as intended and under the
conditions foreseen by the manufacturer, including reasonably foreseeable misuse.
See Annex A for significant hazards.
Together with this document, EN 50050-1:2013, EN 50059:2025, EN 50176:2025 or EN 50348:2010 give
requirements for electrostatic machinery for supply and circulation of liquid coating material.
The specific significant risks related to the use of machinery for supply and circulation of liquid coating
material with foodstuffs and pharmaceutical products are not dealt with in this document.
Interfaces to connected machinery and systems are given in Figure 1, to specify the limit of the machinery
for supply and circulation of liquid coating material.
Key
machinery for supply and circulation of liquid coating material

ditional parts for machinery for supply and circulation of liquid coating material with own forced

ventilation
1 container handling interface and coating material inlet connector
2 inlet connector for recycled coating material
3a pressurized air supply hose assembly (hose and connectors)
3b coating material supply hose assembly (hose and connectors)
4 electrical power supply connector
5 electrostatic high voltage supply connector
6 pressurized air supply connector
7 interface of control system
8 inlet connector of forced ventilation
9 outlet connector of forced ventilation
10 waste process material outlet connector
Figure 1 — Limits of the machinery
This document does not apply to:
— pressure related hazards of equipment classified as higher than category 1 of
Directive 2014/68/EU Article 13;
NOTE 1 For equipment of higher category than category 1 of Directive 2014/68/EU, see EN 13445 (all
parts) and EN 13480 (all parts).
— machinery for the supply of powder coating material;
— machinery for coating material recycling;
— hand-held agitators;
— agitators of more than 3 kW electrical power supply;
— offline heating systems;
— supply systems for CO shot-blasting machinery;
— equipment used for manufacturing of coating material;
— coating material packaging units (drums, containers, etc.).
This document is not applicable to machinery for supply and circulation of liquid coating material
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.
EN 619:2022, Continuous handling equipment and systems — Safety requirements for equipment for
mechanical handling of unit loads
EN 809:1998+A1:2009 , Pumps and pump units for liquids — Common safety requirements
EN 842:1996+A1:2008, Safety of machinery — Visual danger signals — General requirements, design and
testing
EN 1127-1:2019, Explosive atmospheres — Explosion prevention and protection — Part 1: Basic concepts
and methodology
EN 14462:2015, Surface treatment equipment — Noise test code for surface treatment equipment including
its ancillary handling equipment — Accuracy grades 2 and 3
EN 50050-1:2013, Electrostatic hand-held spraying equipment — Safety requirements — Part 1: Hand-
held spraying equipment for ignitable liquid coating materials
EN 50059:2025, Electrostatic hand-held spraying equipment — Safety requirements — Hand-held spraying
equipment for non-ignitable coating materials
EN 50176:2025, Stationary electrostatic application equipment for ignitable liquid coating material —
Safety requirements
EN 50348:2010, Stationary electrostatic application equipment for non-ignitable liquid coating material
— Safety requirements
EN 60079-30-1:2017, Explosive atmospheres — Part 30-1: Electrical resistance trace heating — General
and testing requirements (IEC/IEEE 60079-30-1:2015, modified)
EN 60204-1:2018, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
(IEC 60204-1:2016, modified)
EN 62395-1:2013, Electrical resistance trace heating systems for industrial and commercial applications
— Part 1: General and testing requirements (IEC 62395-1:2013)

As impacted by EN 809:1998+A1:2009/AC:2010.
EN IEC 60079-0:2018, Explosive atmospheres — Part 0: Equipment — General requirements (IEC 60079-
0:2017)
EN IEC 60079-10-1:2021, Explosive atmospheres — Part 10-1: Classification of areas — Explosive gas
atmospheres (IEC 60079-10-1:2020 + COR1:2021)
EN ISO 4413:2010, Hydraulic fluid power — General rules and safety requirements for systems and their
components (ISO 4413:2010)
EN ISO 4414:2010, Pneumatic fluid power — General rules and safety requirements for systems and their
components (ISO 4414:2010)
EN ISO 8031:2020, Rubber and plastics hoses and hose assemblies — Determination of electrical resistance
and conductivity (ISO 8031:2020)
EN ISO 11688-1:2009, Acoustics — Recommended practice for the design of low-noise machinery and
equipment — Part 1: Planning (ISO/TR 11688-1:1995)
EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk
reduction (ISO 12100:2010)
EN ISO 13732-1:2008, Ergonomics of the thermal environment — Methods for the assessment of human
responses to contact with surfaces — Part 1: Hot surfaces (ISO 13732-1:2006)
EN ISO 13849-1:2023, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design (ISO 13849-1:2023)
EN ISO 13851:2019, Safety of machinery — Two-hand control devices — Principles for design and selection
(ISO 13851:2019)
EN ISO 13854:2019, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body
(ISO 13854:2017)
EN ISO 13855:2010, Safety of machinery — Positioning of safeguards with respect to the approach speeds
of parts of the human body (ISO 13855:2010)
EN ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by
upper and lower limbs (ISO 13857:2019)
EN ISO 14120:2015, Safety of machinery — Guards — General requirements for the design and
construction of fixed and movable guards (ISO 14120:2015)
EN ISO 14122-2:2016, Safety of machinery — Permanent means of access to machinery — Part 2: Working
platforms and walkways (ISO 14122-2:2016)
EN ISO 14122-3:2016, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs,
stepladders and guard-rails (ISO 14122-3:2016)
EN ISO 14122-4:2016, Safety of machinery — Permanent means of access to machinery — Part 4: Fixed
ladders (ISO 14122-4:2016)
EN ISO 19353:2019, Safety of machinery — Fire prevention and fire protection (ISO 19353:2019)

As impacted by EN IEC 60079-0:2018/AC:2020-02 and EN IEC 60079-0:2018/A11:2024.
EN ISO 80079-36:2016, Explosive atmospheres — Part 36: Non-electrical equipment for explosive
atmospheres — Basic method and requirements (ISO 80079-36:2016)
ISO 3864-1:2011, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for safety
signs and safety markings
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 12100:2010 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp/
3.1.1
machinery
system for supply and/or circulation of liquid coating materials which may consist of machines and
elements such as:
— pumps (e.g. for processing, supply, circulation);
— rams, lifting equipment and container handling systems if these are integral part of the machinery;
— dosing and mixing units (e.g. for multi component coating materials);
— pressurized and non-pressurized vessels;
— pipes, hoses and their assemblies;
— couplings, valves, pressure regulators;
— agitators;
— filters;
— pulsation dampers;
— control systems;
— forced ventilation systems (for enclosed machinery);
— systems to separate machine parts under high voltage from other machine parts;
— measurement devices;
— sensors;
— equipment for heating and/or cooling of the coating materials

As impacted by EN ISO 80079-36:2016/AC:2019.
3.1.2
coating material
product, in liquid form, that, when applied to a substrate, forms a film possessing protective, decorative
and/or other specific properties
Note 1 to entry: In general, coating materials consist of binders, pigments, dyestuff, fillers and other additives.
Moreover, liquid coating materials can contain organic solvents and /or water.
Note 2 to entry: Coating materials are, for instance, paints, lacquers, varnishes, impregnating varnishes, paste
fillers, filling materials, impregnating agents, anti-noise agents, fire resisting agents, stains, burnishes, adhesives as
well as sealing compounds.
3.1.3
maximum working pressure
maximum admissible static or dynamic fluid pressure as specified by the manufacturer
Note 1 to entry: Individual machinery elements/parts may have individual maximum working pressure values.
3.1.4
maximum working temperature
maximum admissible temperature of machinery elements as specified by the manufacturer
3.1.5
enhanced tightness
absence of leakage when, due to the design and measures of maintenance, any of the tightness tests or
tightness monitorings appropriate for the application does not reveal any hazardous leaks during normal
operations and expected malfunctions
[SOURCE: EN 1127-1:2019, 3.2]
3.1.6
normal tightness
absence of leakage when any of the tightness tests or tightness monitoring appropriate for the application
does not reveal any hazardous leaks during normal operation
[SOURCE: EN 1127-1:2019, 3.1]
3.1.7
agitator
device for mixing and preparation of coating material consisting of
— stirrer,
— shaft,
— drive
and optional
— lid,
— lifter,
— pump,
— sensors
3.1.8
container handling system
handling system for coating material containers and which is integral part of the machinery
3.1.9
vessel
pressurized or non-pressurized process containment for liquid coating material which is part of the
machinery
3.1.10
container
containment for liquid coating material which is not part of the machinery
3.1.11
operator accessible enclosure
enclosure for which provision is made for the presence of persons inside the enclosure during normal
operation
3.1.12
ram
drum press
fixed machinery for extracting coating material from an open top container
3.1.13
forced ventilation
technical ventilation consisting of air exhaust system and air inlet openings or air supply system
3.1.14
enclosed machinery
machinery installed in a predominantly closed enclosure
3.1.15
non-enclosed machinery
machinery not installed in an enclosure
3.2 Symbols
For the purposes of this document, the following symbols apply.
T temperature of a liquid (e.g. coating material, flushing/purging liquid)
Liquid
T flashpoint temperature of a liquid
FP
4 Safety requirements and/or protective/risk reduction measures
4.1 Mechanical
4.1.1 Crushing, drawing in or impact
4.1.1.1 General
Moving parts of the machinery shall be designed and safeguarded in accordance with EN ISO 13857:2019,
EN ISO 13854:2019, EN 809:1998+A1:2009 , EN 842:1996+A1:2008, ISO 3864-1:2011 and
EN ISO 14120:2015.
Fixed guards shall be fixed by systems that can be opened or removed only with tools. Their fixing
systems shall remain attached to the guards or to the machinery when the guards are removed. Where
possible, these guards shall be designed in such a way that they can only remain in place using their fixing
system.
Mobile machinery shall be designed and constructed to avoid
— overturning on a slope of up to 10°;
— unintentional movement during operation, by e.g. brakes for wheels or device to retract wheels from
the floor.
4.1.1.2 Agitators
4.1.1.2.1 General
Openings for visual inspection or replenishment shall be safeguarded against access to hazardous moving
parts with
— fixed guards
or
— movable guards interlocked with the hazardous movement.
Rotating parts shall only operate when guarded and in operating position inside the vessel or container.
The presence of vessels or containers which are not fixed parts of the machinery shall be monitored.
Unintentional rotation of stirring vessels or containers shall be prevented by design or a locking device.
See 4.7 for requirements of control systems.
See 6.2 for instructions to be given for operation with containers which are not an integral part of the
machinery.
4.1.1.2.2 Power-driven lids, vessels and containers
For
— power driven lids (e. g. lids mounted on an elevator) and vessels or containers
or
— lids and power-driven vessels or containers (e.g. vessels lifted by an elevator),
the hazardous area between the lid and the vessel or container top shall be safeguarded by either
— a guard according to EN ISO 14120:2015, interlocked with the hazardous movement
or
— a two-hand control device according to EN ISO 13851:2019
or
— a hold-to-run control positioned in at least 2,5 m distance to the hazardous area.
See 4.7 for requirements of control systems.
4.1.1.3 Rams
Rams shall be equipped with guides for positioning of vessels and containers.
The hazardous area between platen and the vessel or container shall be safeguarded by, either
— a guard according to EN ISO 14120:2015, interlocked with the hazardous movement
or
— a two-hand control device according to EN ISO 13851:2019 and its positioning according to
EN ISO 13855:2010. It shall only be possible to enable the production mode if the platen has entered
the vessel or container.
For rams not safeguarded by a guard according to EN ISO 14120:2015,
— the air pressure for the separation of the platen from the coating material shall be limited to 2 bar.
After separation of coating material and platen and during the release of the platen from the drum,
the air pressure between coating material and platen shall be limited to 0,75 bar
and
— devices (e.g. piloted check valve) to avoid hazardous movement of the platen in case of pressure-loss
shall be installed.
See 4.7 for requirements of control systems.
See 6.2 for instructions to be given for operation.
4.1.1.4 Power driven container handling systems
Power driven container handling systems shall be designed according to EN 619:2022.
4.1.2 Parts under pressure
4.1.2.1 General
The maximum working pressure of the machinery shall be specified.
If the maximum working pressure can be exceeded,
— pressure limiting devices (e.g. pressure relief valve for air driven pumps, burst disk) shall be
installed;
— information on maintenance procedures and cycles of pressure limiting devices, especially when
these are subject to contamination by coating material, shall be given in the instruction for
maintenance (see 6.3);
— the pressure limiting devices in multi-component systems shall be placed on the supply lines of the
single components, if the multi-component lines cannot be flushed.
Uncontrolled ejection of coating materials, cleaning and flushing liquids from the machinery (e.g. from
leakages or element/part failures) shall be avoided by design and construction of the elements/parts.
Each element/part shall be stable up to the specific burst pressure specified in Table 1.
Machinery shall be equipped with a device for release of residual pressure (e.g. a valve with connection
to a container). Information on maintenance procedures and cycles of devices for release of residual
pressure, especially when these are subject to contamination by coating material, shall be given in the
instruction for maintenance (see 6.3).
NOTE Seals can suffer leaks depending on design and function.
4.1.2.2 Pipes, hoses and their assemblies
Pipes, hoses and their assemblies shall be
— adequately protected against harmful external stress (e.g. mechanical damage by abrasion);
— adequately installed to minimize external stress, (e.g. sufficient radius, length);
— resistant against pressure pulsation.
Pipes, hoses and their assemblies shall comply with the requirements of Table 1.
Table 1 — Minimum burst pressures for pipes, hoses and their assemblies
Minimum burst pressure
Maximum working Pipes Hoses and Hoses and their assemblies subjected to stress
pressure P their by torsion, friction, elongation
assemblies
Supply hoses and their Supply hoses and
not
assemblies for automatic their assemblies
subjected to
application equipment and for manual
stress by
hoses installed inside of application
torsion,
robots equipment
friction,
elongation
4-times of the
3-times of the maximum
P < 375 bar maximum working
working pressure
pressure
3-times of the maximum
2-times of the maximum
375 bar ≤ P ≤ 750 bar working pressure, but not 1 500 bar
working pressure
higher than 1 500 bar
P > 750 bar 2-times of the maximum working pressure
Hydraulic power systems and components shall comply with EN ISO 4413:2010.
Pneumatic power systems and components shall comply with EN ISO 4414:2010.
See 4.3.2 for requirements on thermal stability.
For instructions on operation, see 6.2.
For instructions on inspection and maintenance of pipes, hoses and their assemblies, see 6.3.
4.1.2.3 Pumps
Pumps shall comply with EN 809:1998+A1:2009 .
For air driven pumps the pressure limiting device can be installed on the air supply side.
Instructions on pressure relief procedure shall be given in the information for use, see 6.2 and 6.3.
4.1.3 Slipping
Leakage of liquids from the material supply system shall be minimized. Requirements against leakage are
given in 4.5.1.4.
Floor gratings, platforms, steps and walkways which are part of the machinery shall be designed
according to EN ISO 14122-2:2016, EN ISO 14122-3:2016, EN ISO 14122-4:2016.
If the floor is made of detachable elements:
— any hazardous horizontal movement of these elements shall be prevented, e.g. by fasteners and/or
frames;
— it shall be possible to inspect fixings in order to detect any corrosion or any hazardous loosening or
change of position of clamps.
Information shall be given in the user information on
— slip-resistant floor design in working areas around the machinery (see 6.4.1),
— the provision of retention volume (see 6.4.1),
NOTE Requirements for retention devices can be subject to national regulation.
— coating material handling (see 6.2),
— cleaning and maintenance (see 6.2 and 6.3).
4.2 Electrical
4.2.1 General
This clause deals with requirements for electrical safety of humans. See 4.5.4.4.3 for safety requirements
related to electrical ignition hazards.
The electrical equipment (e.g. digital displays, heating systems, initiators) shall comply with
EN 60204-1:2018.
NOTE For use in explosive atmosphere, see further information in EN IEC 60079-0:2018 and 4.5.4.4.
For liquid material supply machinery of electrostatic application systems, EN 50176:2025,
EN 50050-1:2013, EN 50348:2010 or EN 50059:2025 shall be applied.
4.2.2 External influences on the electrical equipment
The electrical equipment shall be selected and installed to prevent damage e.g. by:
— influences of temperature due to e.g. thermal conduction or convection;
— contact with hot parts, drips or molten particles of the materials being processed;
— chemical attack by substances released or processed, e.g. solvents and other aggressive liquids.
4.3 Temperature
4.3.1 Hot surfaces
The maximum surface temperature of machinery parts which are touched repeatedly or permanently
(e.g. material supply hose for manual application equipment) shall be 43 °C or lower.
Warning signs shall be fixed to warn of hot surfaces.
Information shall be given in the instructions for use, on
— instruction and training of operators and maintenance staff;
— machinery parts with hot surfaces;
— required PPE (e.g. thermal protective gloves).
Burns due to unintentional touching of hot surfaces can occur when the maximum working temperature
is above
— 58 °C for smooth metal surfaces (e.g. on pumps, platen, heaters, motors, heated vessels, heated
tubes);
— 76 °C for smooth plastic surfaces (e.g. on heated plastic tubes).
The following protection measures against burns shall be applied:
— reduction of the surface temperature (e.g. by installation of a motor with power reserve). Reduction
of surface temperature is not possible for machinery parts heated due to the material supply working
temperature;
— insulation of heated vessels and heated tubes;
— guards to restrict access to pumps, heaters, motors and heated pipes;
— increasing the distance between machinery parts which are intentionally touched and hot surfaces
of heaters and heated tubes.
NOTE EN ISO 13732-1:2008 provides information on the assessment of and measures against hot surfaces.
4.3.2 Thermal stability
Machinery elements (e.g. hoses and their assemblies, gauges, sealings) shall be designed and/or selected
according to the maximum working temperature.
4.3.3 Heating system
The heating system shall not restart automatically after failure of the heating system.
Electrical heating devices shall comply with EN 62395-1:2013.
See 4.5.4.4.6 for requirements against ignition sources from hot surfaces.
The heating temperature shall be monitored. The overrun of the maximum working temperature shall be
avoided by temperature limiting devices installed at all machinery elements/parts equipped with a
heating device.
NOTE Different machinery elements/parts can have different maximum working temperatures.
The heating system shall be shut off if the maximum working temperature is exceeded.
See 4.7 for requirements of control systems.
A temperature limiting device is not required, if the heating device, even in the case of failure, cannot heat
the machinery elements/parts above their maximum working temperature.
4.4 Noise
The machinery shall be designed and constructed so that the risks resulting from emission of airborne
noise are reduced to the lowest level, taking into account technical progress and availability of means for
noise reduction, especially at source.
The generation and emission of airborne noise by the machinery shall be reduced as far as possible by
— machinery parts with reduced noise emission,
— avoiding pressure fluctuation (e.g. choice of pump type),
— vibration damping or resilient support for membrane pumps and piston pumps,
— silencers for pneumatic machinery parts (e.g. valves at handling devices, stirrers and motors).
If by above measures the A weighted emission sound pressure levels are not reduced to levels below
80 dB, sound isolating enclosures shall be installed either for the complete machinery or for relevant
parts. The A weighted emission sound pressure level outside of the enclosures should be below 80 dB.
NOTE 1 According to the current state of the art, machinery for supply and circulation of liquid coating materials
can be designed so that the A-weighted emission sound pressure level, measured according to the noise test code
given in EN 14462:2015, A.6.2 does not exceed 78 dB.
When designing the machinery, the recommendations given in EN ISO 11688-1:2009 shall be taken into
account.
NOTE 2 EN ISO 11688-2:2000 gives information on noise generation mechanisms in machinery.
The determination of noise emission of the machinery shall be carried out according to EN 14462:2015.
4.5 Hazardous substances
4.5.1 General
4.5.1.1 General
The probability of formation of air containing vapours of coating material in hazardous concentrations in
the environment of the machinery shall be evaluated by a risk assessment, taking into account
— the properties of the coating material (i.e. flashpoint, toxicity);
— the intended use, i.e. procedures of colour changing;
— potential evaporation sources;
— the expected leakage rate of all relevant machinery elements/parts;
— the environment of the machinery (e.g. outside of buildings, spacious production environment with
natural ventilation).
The formation of air containing vapours of coating material in hazardous concentrations in the
environment of the machinery shall be avoided by
— prevention of open surfaces of vessels and containers according to 4.5.1.2;
— prevention of overfilling of vessels according to 4.5.1.3;
— minimization of leakage of hazardous fluids according to 4.5.1.4;
— safe draining according to 4.5.1.5.
Ventilation according to 4.5.1.6 is required, if the formation of air containing vapours of coating material
in hazardous concentrations in the environment of the machinery cannot be avoided.
4.5.1.2 Open surfaces of vessels and containers
Open surfaces of vessels and containers shall be avoided.
Information shall be given in the user information, that vessels and containers shall be covered with lids.
4.5.1.3 Overfilling
Overfilling of vessels shall be prevented in the case of automatic filling. The maximum fill level shall be
monitored. When the maximum fill level is reached, filling shall be stopped.
See 4.7 for requirements of control systems.
4.5.1.4 Leakage
Leakage of hazardous fluids shall be minimized by e.g.:
— tightness of fluid-filled parts of the machinery;
— pressure proof construction of fluid-filled parts of the machinery under pressure;
— designated pressure relief points.
Hoses and their assemblies shall be resistant against chemical attack (e.g. ozone, solvents).
Machinery elements/parts with enhanced tightness are e.g.:
— piping,
— fittings with sealing of the stem passage by a bellow and safety compression gland.
Joints for pipes, hoses and their assemblies with enhanced tightness are e.g.:
— permanent joints, e.g. by welding,
— detachable joints which are rarely detached during normal operation,
— NPT threads (National Pipe Taper Thread), or other tapered pipe threads with thread sealings up to
DN 50, as far as they are not exposed to varying thermal loads (ΔT > 100 K).
Machinery elements/parts with normal tightness are e.g.:
— non-regularly maintained dynamic sealings to the exterior, e.g. of gear pumps,
— direct face to face flanges (without intermediate sealing),
— detachable joints which are regularly detached during normal operation.
All parts of machinery which may be subject to leakage shall be easily accessible. Leakage shall be
detectable (e.g. by monitoring of solvent vapours or liquids or visual inspection).
If machinery elements/parts with normal tightness are regularly maintained and monitored, they can be
considered as machinery elements/parts with enhanced tightness.
Connections between machinery elements/parts shall be
— selected and installed according to the expected mechanical stress (e.g. vibrations),
and
— designed and installed to avoid transfer of hazardous vibration.
All machinery elements/parts shall be selected and installed according to the expected thermal stress
including alternating thermal stress.
Information shall be given in the user information on
— the provision of retention devices (see 6.4.1),
NOTE Requirements for retention devices can be subject to national regulation.
— coating material handling (see 6.2).
4.5.1.5 Draining
The machinery shall be designed and constructed to allow safe draining of all machinery parts containing
hazardous substances.
Draining points shall be marked.
The draining procedure shall be described in the instructions.
4.5.1.6 Ventilation
If the formation of air containing vapours of coating material in hazardous concentrations in the
environment of the machinery cannot be avoided with the measures given in 4.5.1.2, 4.5.1.3, 4.5.1.4 and
4.5.1.5, the measures given in Table 2 shall be applied.
Table 2 — Forced ventilation requirements depending on the health hazard and the
temperature (T ) in relation to the flash point (T ) of the processed liquid
Liquid FP
T < T – 15 K T ≥ T – 15 K T ≥ T – 15 K
Liquid FP Liquid FP Liquid FP
a
permanently occasionally permanently
Health hazardous The machinery shall be fitted with a forced The machinery shall be
liquid ventilation which is effective at the sources of fitted with an enclosure
release. A minimum air volume flow of 50 l/h per with forced ventilation.
emission source shall be ensured. The forced ventilation
shall ensure a minimum
Non health No forced ventilation is required
air exchange rate of 5-
hazardous liquid
times of the enclosure
volume per hour
NOTE Exposure limit values and requirements for emissions to atmosphere can be subject to national
regulation.
a
Less than 15 min in 8 h. See ISO/TR 14121-2:2012.
The total air volume flow of the forced ventilation shall be monitored. Underperformance of the forced
ventilation shall be indicated by an alarm.
See 4.7 for requi
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