1、BRITISH STANDARD BS EN 12921-4:2005+A1:2008Machines for surface cleaning and pretreatment of industrial items using liquids and vapours Part 4: Safety of machines using halogenated solventsICS 25.220.10; 25.220.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g
2、44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 12921-4:2005+A1:2008National forewordThis British Standard is the UK implementation of EN 12921-4:2005+A1:2008. It supersedes BS EN 12921-4:2005 which is withdrawn. The start and fi
3、nish 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 . A list of organizations represented on this subcommittee can be obtained on req
4、uest 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.ISBN Amendmentsg18corrigenda issued since publicationThe U
5、K participation in its preparation was entrusted by Technical Committee MCE/3, Safeguarding of machinery, to Subcommittee MCE/3/8,Thermoprocessing equipment Safety.Date Comments Implementation of CEN amendment A1:2008 BSI 200930 April 2009 978 0 580 63162 7 This British Standard was published under
6、the authority of the Standards Committee and comes into effect on 26 August 2005EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE 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 an
7、d vapours - Part 4: Safety of machines using halogenated solvents Machines de nettoyage et de prtraitement de pices industrielles utilisant des liquides ou des vapeurs - Partie 4: Scurit des machines utilisant des solvants halogns Maschinen zur Oberflchenreinigung und -vorbehandlung von industrielle
8、n Produkten mittels Flssigkeiten oder Dampfphasen - Teil 4: Sicherheit von Maschinen, in denen halogenierte Lsemittel 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/C
9、ENELEC 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
10、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 version
11、s. 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, Spai
12、n, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I T E U R O P E N D E N O R M A LI S A T I O N EUR OP IS C HES KOM ITEE FR NOR M UNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserve
13、d worldwide for CEN national Members. Ref. No. EN 12921-4:2005+A1:2008: EEN 12921-4:2005+A1:2008 (E) 2 Contents Page Foreword4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and definitions .6 4 List of significant hazards 8 5 Safety requirements and/or measures 10 5.1 General10 5.2 Mech
14、anical hazards.10 5.3 Safety requirements and measures against electrical hazards11 5.4 Safety requirements and measures against thermal hazards 11 5.5 Safety requirements and measures against noise.12 5.6 Safety requirements and measures against hazards generated by materials and substances process
15、ed, used or emitted by the cleaning machine.12 5.7 Safety requirements and measures against hazard combinations17 5.8 Safety requirements and measures against failure of energy supply .17 5.9 Safety requirements and measures against failure of control systems 18 6 Verification of the safety requirem
16、ents and/or measures .18 6.1 General18 6.2 Mechanical18 6.3 Electrical .18 6.4 Thermal .18 6.5 Noise .18 6.6 Material and substances processed, used or emitted by the cleaning machines18 6.7 Hazard combinations 22 6.8 Failure of energy supply .22 6.9 Control systems.22 7 Information for use 22 7.1 G
17、eneral22 7.2 Instruction handbook 22 7.3 Minimum marking 24 Annex A (informative) Examples and description of types of cleaning machines using halogenated solvents and design parameters25 A.1 Examples and description of types of cleaning machines using halogenated solvents.25 A.2 Characteristics for
18、 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
19、Requirements of EU Directive 2006/42/EC“.33 Bibliography 34 BS EN 12921-4:2005+A1:2008EN 12921-4:2005+A1:2008 (E) 3 Figures Figure A.1 Collection chamber cleaning machine using halogenated solvents type Ia25 Figure A.2 Single chamber cleaning machine using halogenated solvents type Ib26 Figure A.3 E
20、nclosed 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 zone29 Figure A.5c Refrigerated zone .29 BS EN 12921-4:2005+A1:2008EN 12921-4:2005+A1:2008 (E) 4 Foreword This document (EN 12921-4:200
21、5+A1:2008) has been prepared by the 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 Ma
22、y 2009, and conflicting national standards shall be withdrawn at the latest by December 2009. This document includes Amendment 1, approved by CEN on 2008-10-23. This document supersedes EN 12921-4:2005. The start and finish of text introduced or altered by amendment is indicated in the text by tags
23、! “. !This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directive(s). For relationship with EC Directives, see informative Annexes ZA and ZB, which are integral parts of this docu
24、ment.“ This European Standard is part of a series of standards in the area of safety for development and construction of machines for surface cleaning and pre-treatment of industrial items using liquids or vapours. The EN 12921 series includes the following parts: Part 1: Common safety requirements;
25、 Part 2: Safety of machines using water based cleaning liquids; Part 3: Safety of machines using flammable cleaning liquids; Part 4: Safety of machines using halogenated solvents. NOTE Although a machine for surface cleaning and pre-treatment of industrial items, as an integral whole, formally does
26、not fall under the scope of the ATEX Directive 94/9/EC, the standard is based upon a fundamental risk analysis according to this directive. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard
27、: 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. BS EN 1
28、2921-4:2005+A1:2008EN 12921-4:2005+A1:2008 (E) 5 Introduction This European Standard is a type C standard as stated in EN 12100. This European Standard contains additional safety requirements to and/or deviations from EN 12921-1:2005. The machinery concerned and the extent to which hazards, hazardou
29、s 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 which are stated in type A or B standards, the provisions of this type C standard take precedence over the provisions of the other standards, for
30、 cleaning machines that have been designed and built according to the provisions of this type C standard. BS EN 12921-4:2005+A1:2008EN 12921-4:2005+A1:2008 (E) 6 1 Scope This European Standard specifies the significant hazards of machines for surface cleaning and pre-treatment in the following calle
31、d “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 ar
32、e 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
33、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 re
34、ferences 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
35、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 129
36、21-3, 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 12100-1:200
37、3) 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.
38、 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; BS EN 12921-4:2005+A1:2008EN 129
39、21-4:2005+A1:2008 (E) 7 trichloroethylene; tetrachloroethylene (perchloroethylene). These halogenated solvents used in industry can contain a small quantity of stabilising agents (anti-acid, anti-oxidant, etc). 3.2 vapour zone space within the cleaning machine filled with saturated solvent vapour wh
40、en the cleaning machine is on stand-by 3.3 freeboard zone space within type II-cleaning machines above the vapour zone and up to the rim of the tanks. The freeboard zone can be further divided into cooling zone, safety zone, refrigerated zone (see Annex A) 3.4 cooling zone space within the freeboard
41、 zone of a cleaning machine above the vapour zone and up to the upper part of the condensing cooling coil 3.5 safety zone space within the freeboard zone of a cleaning machine above the cooling zone up to the rim of the tank 3.6 refrigerated zone space within the freeboard zone of a cleaning machine
42、 where its temperature is below 0 C measured at a distance of 150 mm or more from the refrigeration cooling coils 3.7 types of cleaning machines using halogenated solvents types of halogenated solvent cleaning machines used in this European Standard are defined below and examples shown in Annex A 3.
43、7.1 type I - sealed system system in which there is no direct connection between any volume containing halogenated solvent and the outside environment during normal operation 3.7.1.1 type Ia - collection chamber system collection chamber system consists of a collection chamber and one or more proces
44、s chambers with doors, one door sealing the collection chamber from the process chamber(s), the other from the outside environment (see Figure A.1) 3.7.1.2 type Ib - single chamber system single chamber system consists of a chamber which is used for both processing items and collecting halogenated s
45、olvent vapours for recovery (see Figure A.2) 3.7.2 type II - enclosed open system system in which there is no connection between halogenated solvent and the outside environment during normal operation including loading and unloading. This cleaning machine consists of one or more open tank(s) within
46、an enclosure. The items are processed through the cleaning machine by means of mechanical handling device and solvent fumes are collected at the inlet and outlet points of the enclosure (see Figure A.3) 3.8 piston effect rising or escaping of vapours caused by excessive speed in relation to the volu
47、me of the item by which it is introduced into or extracted from the vapour zone BS EN 12921-4:2005+A1:2008EN 12921-4:2005+A1:2008 (E) 8 3.9 open tank tank in which there is communication between solvent and the outside environment during normal operation, including loading and unloading 4 List of si
48、gnificant hazards Table 1 List of significant hazards associated with machines for surface cleaning and pre-treatment using halogenated solvents Clause/sub-clause of this European Standard Hazard Clause/sub-clause of EN 12921-1:2005 4.1 General This clause contains significant hazards, hazardous sit
49、uations and events, as far as they are dealt with in this European Standard, identified by risk assessment as significant for this type of machinery using halogenated cleaning liquids and which requires action to eliminate or reduce the risk. NOTE Information on the method of risk analysis is given in EN 1050. 4.1 4.2 Mechanical hazards 4.2 4.2.1 Crushing, shearing, cutting, entanglement, drawing-in, impact 4.2.1 4.2.2 High pressure fluid ejection 4.2.2 4.2.3 Ejection of parts of the cleaning machine and/or
