EN 12921-4:2005+A1:2008

Machines for surface cleaning and pretreatment of industrial items using liquids and vapours - Part 4: Safety of machines using halogenated solvents

This European Standard specifies the significant hazards of machines for surface cleaning and pre-treatment - in the following called "cleaning machines" - of industrial items using halogenated solvents, either pure or as a mixture.
This European Standard applies together with EN 12921-1:2005. Both parts together cover all significant hazards relevant for cleaning machines of industrial items using liquids or vapours, when they are used as intended and under the conditions foreseen by the manufacturer (see Clause 4). The specific requirements specified in Part 4 take precedence over the respective requirements in EN 12921-1:2005.
This European Standard applies together with EN 12921-3 in case of release of flammable vapours from the cleaning liquids.
This European Standard does not apply to machinery and related equipment excluded from the scope of EN 12921-1:2005.
This European Standard is not applicable to cleaning machines which are manufactured before the publication of this European Standard by CEN.

Maschinen zur Oberflächenreinigung und -vorbehandlung von industriellen Produkten mittels Flüssigkeiten oder Dampfphasen - Teil 4: Sicherheit von Maschinen, in denen halogenierte Lösemittel verwendet werden

Dieses Dokument behandelt signifikante Gefährdungen von Maschinen zur Oberflächenreinigung und  vorbehandlung — im Folgenden „Reinigungsanlagen“ genannt — von industriellen Produkten, in denen halogenierte Lösemittel (rein oder als Gemisch) verwendet werden.
Diese Europäische Norm gilt nur in Verbindung mit EN 12921-1:2005. Zusammen decken beide Teile alle signifikanten Gefährdungen für Reinigungsanlagen für industrielle Produkte, in denen Flüssigkeiten oder Dampfphasen verwendet werden, wenn sie bestimmungsgemäß und unter den vom Hersteller vorgesehenen Bedingungen verwendet werden (siehe Abschnitt 4). Die spezifischen Anforderungen in diesem Teil haben Vorrang vor vergleichbaren Vorschriften in EN 12921-1:2005.
Bei einem Freisetzen von brennbaren Dämpfen aus der Reinigungsflüssigkeit muss diese Europäische Norm zusammen mit EN 12921-3:2005 angewendet werden.
Diese Europäische Norm gilt nicht für Maschinen und deren Ausrüstung, die durch den Anwendungsbereich der EN 12921-1:2005 ausgeschlossen sind.
Diese Europäische Norm gilt nicht für Reinigungsanlagen, die vor Veröffentlichung dieser Europäischen Norm durch CEN hergestellt wurden.

Machines de nettoyage et de prétraitement de pièces industrielles utilisant des liquides ou des vapeurs - Partie 4: Sécurité des machines utilisant des solvants halogénés

La présente Norme européenne spécifie les phénomènes dangereux significatifs des machines de nettoyage et de prétraitement — ci-après désignées «machine de nettoyage» — de pièces industrielles utilisant des solvants halogénés purs ou en mélange.
La présente Norme européenne s'applique conjointement à l’EN 12921-1:2005. Les deux parties couvrent tous les phénomènes dangereux significatifs pertinents aux machines de nettoyage pour pièces industrielles utilisant des liquides ou vapeurs, lorsque ces machines sont utilisées conformément à l'usage prévu et dans les conditions prévues par le fabricant (voir Article 4). Les prescriptions spécifiques précisées dans la Partie 4 prévalent sur les prescriptions respectives de l’EN 12921-1:2005.
La présente Norme européenne s'applique conjointement à l’EN 12921-3 en cas de dégagement de vapeurs inflammables provenant de liquides de nettoyage.
La présente Norme européenne ne s'applique pas aux machines et équipements annexes exclus du domaine d'application de l’EN 12921-1:2005.
La présente Norme européenne ne s'applique pas aux machines de nettoyage de pièces industrielles fabriquées avant la date de publication de la présente Norme européenne par le CEN.

Naprave za površinsko čiščenje in predobdelavo industrijskih proizvodov s pomočjo tekočin in par - 4. del: Varnost naprav, v katerih se za čiščenje uporabljajo halogenirana topila

General Information

• Status: Published
• Publication Date: 25-Nov-2008
• Withdrawal Date: 27-Dec-2009
• ICS: 97.080 - Cleaning appliances
• Technical Committee: CEN/TC 271 - Surface treatment equipment - Safety
• Drafting Committee: CEN/TC 271/WG 1 - Machines for cleaning and pretreatment of industrial items
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 26-Nov-2008
• Completion Date: 26-Nov-2008
• 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: 98/37/EC - Machinery
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Mandate: M/BC/CEN/88/13 - Standardization request to CEN/CENELEC relating to machinery
• Ref Project: SIST EN 12921-4:2005+A1:2009 - Machines for surface cleaning and pretreatment of industrial items using liquids and vapours - Part 4: Safety of machines using halogenated solvents

Relations

• Merged From: EN 12921-4:2005 - Machines for surface cleaning and pretreatment of industrial items using liquids or vapours - Part 4: Safety of machines using halogenated solvents
• Effective Date: 19-Jan-2023

Overview

EN 12921-4:2005+A1:2008 is the CEN European safety standard for machines for surface cleaning and pretreatment of industrial items using halogenated solvents. It specifies the significant hazards and safety requirements for cleaning machines that use halogenated solvents (pure or in mixtures) and is intended to be applied together with EN 12921-1:2005 (common safety requirements). Where relevant, Part 4 takes precedence over Part 1. If flammable vapours can be released, EN 12921-3 also applies. The standard covers machines manufactured after its publication and is aimed at reducing risks associated with solvent vapours, mechanical, electrical and thermal hazards.

Key topics and technical requirements

• Scope & terminology: Definitions specific to halogenated solvents (e.g., vapour zone, freeboard zone, refrigerated zone) and machine types (Type I sealed systems - Ia collection chamber, Ib single chamber; Type II enclosed open systems).
• List of significant hazards: Identifies mechanical, electrical, thermal, noise and material/substance-related hazards associated with halogenated solvent cleaning.
• Safety requirements and measures:
  • Mechanical hazards (crushing, entanglement, ejection, mass/stability, slip/trip).
  • Electrical safety and protection against electrical faults.
  • Thermal controls and measures to manage hot surfaces and temperatures.
  • Noise control requirements.
  • Controls for hazards from materials and emissions (vapour release, inhalation risks, drag-out, leaks, filling/emptying).
  • Protection against hazard combinations, energy supply failures and control system failures.
• Verification and testing: Clauses for verifying mechanical, electrical, thermal, noise and emission controls.
• Information for use: Requirements for instruction handbooks, markings and user information to ensure safe operation and maintenance.
• Annexes: Informative examples of machine types, design parameters and solvent characteristics (e.g., refrigerated zone defined as < 0 °C measured ≥150 mm from refrigeration coils).

Applications and who uses this standard

• Machine manufacturers designing and building industrial cleaning systems using halogenated solvents.
• Safety engineers & OEMs for machine risk assessments and compliance.
• Plant managers & operators implementing safe operating, filling and maintenance procedures.
• CE conformity assessors, notified bodies and compliance consultants verifying alignment with EU machinery directives.
• Design consultants specifying enclosures, vapour recovery and control systems.

Related standards

• EN 12921-1:2005 - Common safety requirements (applies together; Part 4 takes precedence where different).
• EN 12921-3 - Applies when flammable vapours may be released.
• EN ISO 12100 series - General machine safety principles and terminology.

Keywords: EN 12921-4:2005+A1:2008, halogenated solvents, cleaning machines, solvent vapour safety, CEN standard, industrial surface cleaning, vapour zone, freeboard zone.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.þLãþHQMHMaschinen zur Oberflächenreinigung und -vorbehandlung von industriellen Produkten mittels Flüssigkeiten oder Dampfphasen - Teil 4: Sicherheit von Maschinen, in denen halogenierte Lösemittel verwendet werdenMachines de nettoyage et de prétraitement de pièces industrielles utilisant des liquides ou des vapeurs - Partie 4: Sécurité des machines utilisant des solvants halogénésMachines for surface cleaning and pretreatment of industrial items using liquids and vapours - Part 4: Safety of machines using halogenated solvents97.080Aparati za nego talFloor treatment appliancesICS:Ta slovenski standard je istoveten z:EN 12921-4:2005+A1:2008SIST EN 12921-4:2005+A1:2009en,fr01-marec-2009SIST EN 12921-4:2005+A1:2009SLOVENSKI
STANDARDSIST EN 12921-4:20051DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12921-4:2005+A1
November 2008 ICS 97.080 Supersedes EN 12921-4:2005 English Version
Machines for surface cleaning and pretreatment of industrial items using liquids and vapours - Part 4: Safety of machines using halogenated solvents
Machines de nettoyage et de prétraitement de pièces industrielles utilisant des liquides ou des vapeurs -Partie 4: Sécurité des machines utilisant des solvants halogénés
Maschinen zur Oberflächenreinigung und -vorbehandlung von industriellen Produkten mittels Flüssigkeiten oder Dampfphasen -Teil 4: Sicherheit von Maschinen, in denen halogenierte Lösemittel verwendet werden This European Standard was approved by CEN on 19 May 2005 and includes Amendment 1 approved by CEN on 23 October 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 © 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12921-4:2005+A1:2008: ESIST EN 12921-4:2005+A1:2009

Examples and description of types of cleaning machines using halogenated solvents and design parameters.25 A.1 Examples and description of types of cleaning machines using halogenated solvents.25 A.2 Characteristics for halogenated solvents.30 Annex B (informative)
A-deviations.31 Annex ZA (informative)
!Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC, amended by 98/79/EC".32 Annex ZB (informative)
!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC".33 Bibliography.34
Figures Figure A.1 — Collection chamber cleaning machine using halogenated solvents – type Ia.25 Figure A.2 — Single chamber cleaning machine using halogenated solvents – type Ib.26 Figure A.3 — Enclosed open cleaning machine using halogenated solvents – type II-a.27 Figure A.4 — Open top tank.28 Figure A.5a — Freeboard zones.29 Figure A.5b — Cooling zone and safety zone.29 Figure A.5c — Refrigerated zone.29
1 Scope This European Standard specifies the significant hazards of machines for surface cleaning and pre-treatment – in the following called "cleaning machines" – of industrial items using halogenated solvents, either pure or as a mixture. This European Standard applies together with EN 12921-1:2005. Both parts together cover all significant hazards relevant for cleaning machines of industrial items using liquids or vapours, when they are used as intended and under the conditions foreseen by the manufacturer (see Clause 4). The specific requirements specified in Part 4 take precedence over the respective requirements in EN 12921-1:2005. This European Standard applies together with EN 12921-3 in case of release of flammable vapours from the cleaning liquids. This European Standard does not apply to machinery and related equipment excluded from the scope of EN 12921-1:2005. This European Standard is not applicable to cleaning machines which are manufactured before the publication of this European Standard 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 1093-3, Safety of machinery — Evaluation of the emission of airborne hazardous substances — Part 3: Emission rate of a specified pollutant — Bench test method using the real pollutant EN 12921-1:2005, Machines for surface cleaning and pretreatment of industrial items using liquids or vapours — Part 1: Common safety requirements EN 12921-3, Machines for surface cleaning and pretreatment of industrial items using liquids or vapours — Part 3: Safety of machines using flammable cleaning liquids EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology, methodology (ISO 12100-1:2003)
EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical principle (ISO 12100-2:2003) 3 Terms and definitions For the purpose of this European Standard, the terms and definitions given in EN ISO 12100-1:2003, EN 12921-1:2005 and the following apply. 3.1 halogenated solvent organic solvent containing at least one halogen atom per molecule and not having a flash point as obtained by standard methods NOTE Examples for halogenated solvents are:  dichloromethane (methylene chloride);  HCFC 123, HCFC 141B and HCFC 225;
4.6.2.2 Substances generated by chemical decomposition These hazards are related to:  solvent overheating due to the increased concentration of contaminants (high boiling oils, hydrocarbons, tar, etc.);  over temperature by the heating system;  chemical reactions between halogenated solvent and water (present on the items to be cleaned due to humidity condensation or other sources);  halogenated solvent breakdown due to radiation, e.g. UV light;  halogenated solvent breakdown due to high temperature from external sources (e.g. flames);  halogenated solvent breakdown due to reaction caused by reactive metal fines and swarf acting as a catalyst (e.g. zinc, magnesium, aluminium).
4.6.3 Fire and explosion hazard See 4.6.3.1 and 4.6.3.2 of EN 12921-1:2005. Fire or explosion hazards are caused by presence of flammable vapours (in hazardous explosion mixtures) together with a potential ignition source. Flammable vapours can be originated from total loss of halogenated solvent and overheating of combustible contaminants. Vapours produced within the flammable region and a high energy source being present. NOTE The risk of fire or explosion is extremely low with halogenated solvents during normal operation. 4.6.3 4.7 Hazards combinations 4.7 4.8 Hazards caused by failure of energy supply 4.8 4.9 Hazards related to failure of control system 4.9 SIST EN 12921-4:2005+A1:2009

NOTE The above requirement can best be achieved by means of programmable mechanical handling. 5.6.2.1.4.5 Items process dwell time
In type Ia- and type II-cleaning machines, the items shall be held in the cleaning tanks for the necessary period of time to ensure the items leave the cleaning liquid at a temperature equal to the final cleaning tank fluid temperature, to avoid excessive drag-out. Exceptions can be allowed if other suitable means or any other systems resulting in the same level of safety. NOTE For type Ia-cleaning machines the above can be achieved e.g. by fitting a vapour sensor at the vapour zone height, for type II-cleaning machines this can be achieved e.g. by means of adequate programming of mechanical handling. 5.6.2.1.4.6 Items drying Before an item is removed from the cleaning machine it shall be free from all residual halogenated solvent. NOTE For type I-cleaning machines this can be achieved e.g. by fitting a halogenated solvent concentration monitoring device in the
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