Bsi bs en 12621 2006 + a1 2010

untitled BRITISH STANDARD BS EN 12621 2006 +A1 2010 Machinery for the supply and circulation of coating materials under pressure — Safety requirements ICS 87 100 ��������� � ���� ���������������������[.]

Machinery for the

supply and circulation

This British Standard is the UK implementation of

EN 12621:2006+A1:2010 It supersedes BS EN 12621:2006 which is withdrawn

The start and finish of text introduced or altered by amendment is indicated in the text by tags Tags indicating changes to CEN text carry the number of the CEN amendment For example, text altered by CEN amendment A1 is indicated by !"

The UK participation in its preparation was entrusted by Technical Committee MCE/3, Safeguarding of machinery, to Subcommittee MCE/3/8, Thermoprocessing equipment — safety

A list of organizations represented on this subcommittee can be obtained on request to its secretary

This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was

published under the authority

of the Standards Policy and

EUROPÄISCHE NORM

English Version

Machinery for the supply and circulation of coating materials

under pressure - Safety requirements

Installations d'alimentation et de circulation de produits de

revêtement sous pression - Prescriptions de sécurité

Förder- und Umlaufanlagen für Beschichtungsstoffe unter

Druck - Sicherheitsanforderungen

This European Standard was approved by CEN on 9 December 2005 and includes Amendment 1 approved by CEN on 30 April 2010 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, Croatia, 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

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E FÜ R N O R M U N G

Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2010 CEN All rights of exploitation in any form and by any means reserved

worldwide for CEN national Members

Ref No EN 12621:2006+A1:2010: E

Contents

page

Foreword 4



Introduction 5



1





2





3





4





4.1





4.2





4.3





4.4





4.5





4.6





4.7





4.8





4.9





4.10





5





5.1





5.2





5.3





5.4





5.5





5.6





5.7





5.8





5.9





5.10





6





6.1





6.2





6.3





6.4





6.5





6.6





6.7





6.8





6.9





6.10





7





7.1





7.2





7.3





Annex A (informative) National references to exposure limit values 27



Annex B (informative) Relationship between categories and zones 29



Annex C (informative) Classification of construction material’s reaction to fire - National standards 30



3

Annex ZA (informative) !!Relationship between this European Standard and the Essential

Requirements of EU Directive 2006/42/EC"" 31



Requirements of EU Directive 94/9/EC 32



Bibliography 33



Foreword

This document (EN 12621:2006+A1:2010) 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 December 2010, and conflicting national standards shall be withdrawn at the latest

by December 2010

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights

This document includes Amendment 1, approved by CEN on 2010-04-30

This document supersedes EN 12621:2006

The start and finish of text introduced or altered by amendment is indicated in the text by tags ! "

This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s)

For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this European Standard

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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

5

Introduction

This European Standard is a type C standard as stated in EN ISO 12100

This European Standard is part of a series of documents prepared by CEN/TC 271/WG2 specifying the health, safety and environmental protection requirements for devices, units and equipment for surface coating:

 EN 1953 "Atomising and spraying equipment for coating materials";

 !EN 12621:2006+A1" "Machinery for the supply and circulation of coating materials under pressure";

 !EN 12757-1" "Mixing machinery for coating materials"

The machinery concerned and the extent to which hazards, hazardous situations and events are covered are indicated in the scope of this European Standard

When provisions of this type C standard are different from those 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

1 Scope

1.1 This European Standard applies to the design and construction of machinery for the supply and circulation of coating and/or auxiliary materials under pressure – in the following called "machine" (see 3.1)

The coating material is supplied by air pressure or airless

NOTE Machines covered by this European Standard may be linked with e.g colour mixing machinery, atomising and spraying equipment, spray booths and stands and/or automated coating machinery

The pressure related parts of the machines covered are classified as no higher than category I under article 9 of the Pressure Equipment Directive 97/23/EC

This European Standard deals with the significant hazards, hazardous situations and events relevant to the machinery for the supply and circulation of coating and/or auxiliary materials under pressure, when they are used

as intended and under the conditions foreseen by the manufacturer (see Clause 4)

Machinery for the supply and circulation of coating and/or auxiliary materials under pressure consists of the following equipment:

 pump units;

 pressure vessels;

 non-pressurised containers;

 interconnecting pipes and hoses

 flanges, nozzles, couplings, supports, lifting equipment etc.;

 agitators;

 filters;

 pulsation damping devices;

 all safety devices (e.g level monitoring equipment);

 equipment for heating and/or cooling of the coating materials

The machine may be fixed or mobile

1.2 This European Standard excludes:

 pressure related hazards of equipment classified as higher than category 1 under article 9 of the Pressure Equipment Directive 97/23/EC;

 atomising and spraying equipment as dealt with in EN 1953:1998 and the supply hoses for this equipment;

 atomising and spraying equipment as dealt with in EN 50144-2-7:2001, EN 50260-2-7:2002 and the supply hoses for this equipment

1.3 This European Standard does not apply to:

 !machinery for" processing of foodstuffs and pharmaceuticals;

7

 design and construction of pipes and hoses;

 design and construction of coating presses (see 3.23);

 machinery for the supply of powder coating material

1.4 This European Standard is not applicable to machinery for the supply and circulation of coating materials under pressure which are manufactured before the date of publication of this document by CEN

2 Normative references

The following referenced documents are indispensable for the application of this European Standard For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies

EN 294:1992, Safety of machinery — Safety distance to prevent danger zones being reached by the upper limbs

EN 349:1993, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body

EN 563:1994, Safety of machinery — Temperatures of touchable surfaces — Ergonomics data to establish temperature limit values for hot surfaces

EN 619:2002, Continuous handling equipment and systems — Safety and EMC requirements for equipment for mechanical handling of unit loads

EN 809:1998, Pumps and pump units for liquids — Common safety requirements

EN 811:1996, Safety of machinery — Safety distances to prevent danger zones being reached by the lower limbs

EN 842:1996, Safety of machinery — Visual danger signals — General requirements, design and testing

EN 894-1:1997, Safety of machinery — Ergonomics requirements for the design of displays and control actuators — Part 1: General principles for human interactions with displays and control actuators

EN 894-2:1997, Safety of machinery — Ergonomics requirements for the design of displays and control actuators — Part 2: Displays

EN 894-3:2000, Safety of machinery — Ergonomics requirements for the design of displays and control actuators — Part 3: Control actuators

EN 953:1997, Safety of machinery — Guards — General requirements for the design and construction of fixed and movable guards

EN 954-1:1996, Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design

EN 971-1:1996, Paints and varnishes — Terms and definitions for coating materials — Part 1: General terms

EN 981:1996, Safety of machinery — System of auditory and visual danger and information signals

EN 982:1996, Safety of machinery — Safety requirements for fluid power systems and their components — Hydraulics

EN 983:1996, Safety of machinery — Safety requirements for fluid power systems and their components — Pneumatics

EN 1037:1995, Safety of machinery — Prevention of unexpected start-up

EN 1088:1995, Safety of machinery — Interlocking devices associated with guards — Principles for design and selection

!EN 1127-1:2007", Explosive atmospheres — Explosion prevention and protection — Part 1: Basic concepts and methodology

EN 1494:2000, Mobile or movable jacks and associated lifting equipment

EN 1570:1998, Safety requirements for lifting tables

prEN 1829-1, High pressure cleaners — High pressure water jet machines — Safety requirements — Part 1: General description

EN 1953:1998, Atomising and spraying equipment for coating materials — Safety requirements

!EN 13237:2003, Potentially explosive atmospheres — Terms and definitions for equipment and protective

systems intended for use in potentially explosive atmospheres"

EN 13445-1:2002, Unfired pressure vessels — Part 1: General

EN 13463-1:2001, Non-electrical equipment for potentially explosive atmospheres — Part 1: Basic method and requirements

EN 13463-5:2003, Non-electrical equipment intended for use in potentially explosive atmospheres — Part 5: Protection by constructional safety "c"

EN 13478:2001, Safety of machinery — Fire prevention and protection

EN 14462:2005, Surface treatment equipment — Noise test code for surface treatment equipment including its ancillary handling equipment — Accuracy grades 2 and 3

!EN 50050:2006", Electrical apparatus for potentially explosive atmospheres — Electrostatic hand-held spraying equipment

EN 50059:1990, Specification for electrostatic hand-held spraying equipment for non-flammable material for painting and finishing

EN 50176:1996, Automatic electrostatic spraying installations for flammable liquid spraying material

3 Terms and definitions

For the purposes of this European Standard, the terms and definitions given in EN 971-1:1996 and EN ISO 1:2003 and the following apply

equipment used for the application of coating materials

NOTE Application by means such as, but not limited to:

 atomising and spraying;

NOTE Such device is generally used in conjunction with pressure vessels or coating material containers Such devices may be driven by a power supply

3.8

pulsation damping device

device used to reduce pulsations which have been transmitted to the coating and/or auxiliary material by the operating cycles of the pump unit used in the machine

3.9

equipment for heating and/or cooling the coating and/or auxiliary materials

equipment, which may use electrical energy or some other source of energy, such as water or gas, to create a temperature change in the coating and/or auxiliary material

3.10

coating material

organic product in liquid or in paste form (see 1.9 of EN 971-1:1996)

NOTE 1 Such coating materials may consist of binders, pigments, fillers, solvents, thinner and other additives

NOTE 2 Such coating materials can be:

material used for functions e.g.:

 solvents, compressed air (for cleaning),

 water, compressed air (for maintenance)

equipment Group II category 1

equipment designed to be capable of functioning in conformity with the operational parameters established by the manufacturer and ensuring a very high level of protection

Equipment in this category is intended for use in areas in which explosive atmospheres caused by mixtures of air and gases, vapours or mists or by air/dusts mixtures are present continuously, for long periods or frequently Equipment of this category ensures the requisite level of protection, even in the event of rare malfunctions relating

to equipment, and is characterised by means of protection such that:

 either, in the event of failure of one means of protection, at least an independent second means provides the requisite level of protection,

 or the requisite level of protection is assured in the event of two faults occurring independently of each other

3.15.2

equipment Group II category 2

equipment designed to be capable of functioning in conformity with the operational parameters established by the manufacturer and ensuring a high level of protection

Equipment in this category is intended for use in areas in which explosive atmospheres caused by mixtures of air and gases, vapours or mists or by air/dusts mixtures are likely to occur

The means of protection relating to equipment in this category ensures the requisite level of protection, even in the event of frequently occurring disturbances or equipment faults that normally have to be taken into account

3.15.3

equipment Group II category 3

equipment designed to be capable of functioning in conformity with the operational parameters established by the manufacturer and ensuring a normal level of protection

Equipment in this category is intended for use in areas in which explosive atmospheres caused by mixtures of air and gases, vapours or mists or by air/dusts mixtures are unlikely to occur or, if they do occur, are likely to do so only infrequently and for a short period only

Equipment of this category ensures the requisite level of protection during normal operation

3.16

chemical reaction

process where the coating material or any part of the coating material reacts with the materials of construction of the machine and/or process which takes place between the components of coating materials

3.17

maximum allowable pressure

maximum pressure for which the equipment is designed as specified by the manufacturer

3.18

maximum allowable temperature

maximum temperature for which the equipment is designed as specified by the manufacturer

NOTE This includes for instance two-column installations for viscous materials such as solvents, adhesives and mastics

4 List of significant hazards

4.1 General

This clause contains the significant hazards, hazardous situations and events as far as they are dealt with in this European Standard, identified by risk assessment as significant for these types of machines and which require action to eliminate or reduce the risk

The following hazards may occur when installing, operating, cleaning or maintaining the machine

NOTE Information on the method of risk analysis is given in EN 1050

4.2 Mechanical hazards

4.2.1 Crushing, drawing in or trapping, impact hazards:

These hazards are related to:

 physical contact with fixed or moving parts of the machine;

 instability of mobile machines (causing tipping or moving)

13

4.2.2 High pressure fluid injection or ejection hazard

These hazards are related to:

 Overpressure;

 rupture of hosing, piping or joints due to failure, breakdown, vibration, shock loading, material fatigue, erosion

or corrosion

4.3 Electrical hazards

4.3.1 Electrical shock (by direct or indirect contact)

Such hazards can occur, for instance by touching:

 electrically live parts that are non insulated for operational reasons;

 conductive parts which are not at a dangerous voltage under normal operation, but in the case of failure could be;

 electrically live parts when the insulation is damaged by contact with solvents or by mechanical parts

4.3.2 External influence on electrical equipment hazard

Such hazards can occur, for instance when interaction of the electrostatic high voltage equipment with construction elements of the control and safety systems can cause dangerous malfunctions for instance short circuits on electronic safety circuits, alarm units

4.4 Thermal hazards

These hazards are related to:

 the application of heated or cooled coating materials;

 the use of heated air;

 unexpected ejection of hot coating materials;

 unintended heating of any part of the machine during operation;

 failure of indication of the maximum allowable temperature of the content

4.5 Noise hazards

Hazardous noise levels can be reached for instance by noise emission of pumps, handling devices, compressed air equipment (motors, valves etc.) when the coating and/or auxiliary materials are pressurised and supplied and/or circulated under pressure Noise can cause hearing impairment, accidents to operators of the machine or persons working near it due to interference with verbal communication and with perception of acoustic danger signals, extra-auditory effects, shock reactions

 the transmission of machine component vibrations which may affect the sensory awareness and/or health of operators using or working near to the machine;

 out of balance rotary components in the machine

4.7 Hazards generated by dangerous substances

4.7.1 Hazards resulting from contact with/or absorption of dangerous substances

Such hazards can be generated by contact with/or absorption of organic liquid coating materials, solvents and cleaning agents causing skin and eye damage, dermatitis or allergies

4.7.2 Hazards resulting from inhalation of dangerous substances

Such hazards can be generated by inhalation of aerosols and solvent vapours released by organic liquid coating materials

4.8 Fire and explosion hazards generated by coating and/or auxiliary materials under pressure

Such hazards are generated by flammable coating and/or auxiliary materials as vapour, suspension of fine droplets and/or explosive mixtures together with sources of ignition

Examples of flammable substances that increase the concentration above normal are:

 not allowable working temperature leading to the formation of flammable vapours;

 failure of hoses, pipes and/or fittings with exit of flammable substances;

 auto-ignition caused by chemical reactions between different types of liquid coating materials

Examples of ignition sources are:

 hot surfaces e.g of heating and/or electrical equipment;

 sparks created by mechanically induced energy e.g fans, agitators;

 electrostatic discharges;

 electrical sparks;

 welding and other sources of thermal energy used during maintenance and cleaning

4.9 Hazards caused by failure of energy supply

These hazards are related to:

 the unexpected escape of coating and/or auxiliary materials after a short interruption in the supply and/or circulation caused by e.g a temporary blockage in the coating equipment to which the materials are being supplied etc.;

 failure of any automatic shut-off of the coating and/or auxiliary materials allowing the materials to continue flowing uncontrolled;

 missing indicators or warning signals such as optical and/or audio warning signal or pressure and/or temperature gauges on any part of the machine

15

4.10 Hazards related to failure of control systems

These hazards may lead to:

 overpressure due to failure of maximum overpressure control;

 inadmissible temperature due to failure of maximum temperature control;

 increased emission of vapours in case of unexpected ejection of coating materials due to failure of control circuit between overpressure and supply

5 Safety requirements and/or measures

5.1 General

The machine shall comply with the safety requirements and/or protective measures of this standard In addition it shall be designed according to the principles of EN ISO 12100 for hazards relevant but not significant which are not dealt with by this European Standard (e.g sharp edges)

Assemblies as an integrated and functional whole shall be designed and constructed with suitable and reliable components, including safety components All components shall be properly integrated

5.2 Safety requirements and measures against mechanical hazards

5.2.1 Safety measures against crushing, shearing, drawing in or trapping, impact

Moving parts of pumps, agitators, lifting equipment and presses shall be designed and safeguarded in such a way that during normal operation and maintenance crushing, shearing, drawing-in or trapping, impact cannot occur

EN 294, EN 349, EN 809, EN 811, EN 842, ISO 3864-1, EN 619 and EN 953 shall be taken into account

Access to automatic supply systems shall be safeguarded by fence-type enclosure or in a way resulting in the same level of safety For fence-type enclosures, the safety distances according to EN 294 apply Guards shall satisfy the requirements of EN 953:1997 Access doors shall be interlocked with dangerous movements

!When fixed guards are applied, they 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."

!Machines shall be designed and constructed to ensure that they will not fall over or move unintentionally, during use, transportation, assembly, dismantling when out of service, testing or foreseeable breakdowns."

Lifting equipment shall be designed and constructed in accordance with EN 1570 or EN 1494

If access to containers equipped with agitating devices is needed, the hazardous movement of the agitator shall be stopped before the agitator shaft with vane can be reached The interlocking circuit shall be in accordance with

EN 1088

5.2.2 Safety requirements against hazards generated by ejection of materials

5.2.2.1 Machines and their components shall be designed and constructed in such a way that no hazardous

ejection of materials may result from leakages or component failures

Machines with airless supply of coating material shall be in accordance with EN 809 and EN 1829-1 for all pressure ranges

The requirements shall be fulfilled by:

 adequate design of all parts under pressure;

 guards and protection according to EN 953

Components shall be designed and constructed for the maximum pressure they could be subjected to, also taking into account faulty conditions

Where a pressure system is composed of interconnected pressure vessels it shall be classified in the highest category according to the Pressure Equipment Directive applicable for the individual pressure vessel Where a pressure vessel contains several fluids, classification shall be on the basis of the fluid which requires the highest category

Machines shall be equipped with an exhaust device for safe dumping of residual pressure (e.g valve with deflection) Pressure shall not be dumped by e.g disconnection of a pipe or hose or opening a draining valve

If equipped with a draining valve, opening of the draining valve shall only be possible by using a tool and in depressurised condition

Safety devices shall be designed and positioned in such a way that no hazard may result from escaping materials Hydraulic power systems and components shall comply with EN 982

Pneumatic power systems and components shall comply with EN 983

NOTE For detailed information about dumping, filling and draining procedures see 7.2

5.2.2.2 The machine shall be fitted with a pressure limiting device to prevent exceeding of the maximum

allowable pressure Safety systems shall be in accordance with EN 13445-1 Pressure losses or drops shall not generate a hazard

If equipped with an integrated pressurising system (e.g compressor) the pressure relief device shall be interlocked with the power supply of the pressurising system

5.2.2.3 Piping and hoses shall be:

 adequately protected against harmful external effects (e.g mechanical damage by friction);

 adequately installed to prevent mechanical stresses, (e.g sufficient radius, length);

 suitably resistant against thermal strain

For information on inspection and maintenance of piping and hoses see 7.2

5.3 Electrical safety requirements

5.3.1 Electrical equipment for mobile or fixed (stationary) machines shall comply with EN 60204-1:1997

For requirements against electrostatic hazards of atomising and spraying equipment EN 1953, EN 50050 and

EN 50176 shall be taken into account

5.3.2 Protection against electric shock shall comply with the requirements of Clause 6 of EN 60204-1:1997

The design of the machine shall ensure that static electricity can be discharged in a controlled manner by the use

of any kind of one or more earth connections according Clause 6 of EN 60204-1:1997 with a resistance similar to or less than 1 MΩ

5.3.3 The insulation of electrical equipment shall be resistant against solvents, coating and/or auxiliary materials

Electrical equipment shall have a protected installation against outside mechanical influence

5.3.4 If electrical/electronic components are used, the manufacturer shall ensure that the equipment does not

produce any electromagnetic disturbances above the levels specified in EN 6-3:2001 or EN 6-4:2001 as selected by the manufacturer to be appropriate for the intended place of use Moreover, it shall also have sufficient immunity to electromagnetic disturbances to enable it to operate safely as intended and shall not fail to danger when exposed to the levels and types of disturbance as specified in

61000-EN 61000-6-1:2001 or 61000-EN 61000-6-2:1994

NOTE It is recommended that manufacturers use only components that have been identified as conforming for immunity and emission to harmonised EMC standards and apply them in accordance with the supplier’s recommendations

5.4 Safety requirements and measures against thermal hazards

Machines with equipment for heating and/or cooling of coating material shall be designed and constructed to minimise any risk of injury caused by contact, radiation or convection from hot or very cold surfaces of the machine and its parts or coating material

Limits of temperatures of touchable surfaces given in EN 563 shall be observed

The hazard of touching hot surfaces shall preferably be reduced by:

 limitation of coating material temperature;

 insulation;

 guarding to keep distance (screen, barrier, according to EN 953)

and where necessary:

 marking and warning signals according to EN 894-1, EN 894-2, EN 894-3, EN 61310-1 and EN 981;

 instructions of use of personal protective equipment (see 7.2)

Protection against burns by hot surfaces shall be secured by means of appropriate insulation or protection against contact of all elements within arm's reach and within the working area According to EN 563 at an ambient temperature of 20 °C the surface temperature shall be less than 60 °C Exceptions are permissible in small localised areas of the surface (for example flanges of burners, bolts)

Any parts of the machine not normally in contact with the human body which may exceed these temperatures will require special warnings in the instruction handbook including recommended contact time limits as shown in

EN 563 Such surfaces shall also be fitted with warning labels indicating the risks and stating the maximum temperature that these surfaces may reach For pipelines, 1 label/3m is required

For non-metallic components such as hoses and seals, the manufacturer's recommendations shall be observed Machines with equipment for heating and/or cooling of coating material shall be safeguarded to prevent the coating material exceeding the maximum allowable temperature for the intended use When temperature limiting controls are used, over-temperature shall be at least be avoided by end of scale of the temperature setting device or protection of the maximum set point by key lock or code system