1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12505:2000 ICS 67.2
2、60 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Food processing machinery Centrifugal machines for processing edible oils and fats Safety and hygiene requirements +A1:2009National foreword This British Standard is the UK implementation of EN 12505:2000+A1:2009. It supersede
3、s BS EN 12505:2000 which is withdrawn.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 i
4、n its preparation was entrusted by Technical Committee MCE/3, Safeguarding of machinery, to Subcommittee MCE/3/5, Food industry machines. A list of organizations represented on this subcommittee can be obtained on request to its secretary. As part of BSIs duty of care, we recommend to users of BS EN
5、 12505:2000 that reference should also be made to BS EN 12547:1999, Centrifuges Common safety requirements. 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 imm
6、unity from legal obligations. BS EN 12505:2000+A1:2009 This British Standard, having been prepared under the direction of the Engineering Sec- tor Committee, was published under the authority of the Standards Committee and comes into effect on 15 October 2000 BSI 2010 Amendments/corrigenda issued si
7、nce publication Date Comments 31 January 2010 Implementation of CEN amendment A1:2009 ISBN 978 0 580 62494 0 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12505:2000+A1 October 2009 ICS 67.260 Supersedes EN 12505:2000 English Version Food processing machinery - Centrifugal machines for proces
8、sing edible oils and fats - Safety and hygiene requirements Machines pour les produits alimentaires - Centrifugeuses pour le traitement des huiles et des graisses alimentaires - Prescriptions de scurit et dhygine Nahrungsmittelmaschinen - Zentrifugen zur Verarbeitung von ebaren len und Fetten - Sich
9、erheits- und Hygieneanforderungen This European Standard was approved by CEN on 21 April 2000 and includes Amendment 1 approved by CEN on 23 July 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the statu
10、s 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
11、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
12、, 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 COMIT EUROPEN DE NOR
13、MALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12505:2000+A1:2009: EEN 12505:2000+A1:2009 (E) 2 Contents Page Foreword 3 Introduct
14、ion .4 1 Scope 4 2 Normative references 4 3 Definitions and descriptions 6 4 List of significant hazards 9 5 Safety requirements and/or measures . 14 6 Verification 20 7 ! ! ! !Information for use (see Clause 6 of EN ISO 12100-2:2003)“ “ “ “ 21 Annex A (normative) Noise test code - Grade 2 of accura
15、cy. 24 Annex B (normative) Principles of design to ensure the hygiene of centrifugal machine for processing edible oils and fats . 28 Annex C (informative) Evaluation and verification method for bowl design and calculation procedure 30 Annex D (informative) Bibliography . 36 Annex ZA (informative) !
16、 ! ! !Relationship of this European standard and the Essential Requirements of EU Directive 98/37/EC“ “ “ “ 37 Annex ZB (informative) ! ! ! !Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC“ “ “ “ 38 BS EN 12505:2000+A1:2009 EN 12505:2000+A1:2009
17、(E) 3 Foreword This document (EN 12505:2000+A1:2009) has been prepared by Technical Committee CEN/TC 153 “Machinery intended for use with foodstuffs and feed“, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of a
18、n identical text or by endorsement, at the latest by April 2010, and conflicting national standards shall be withdrawn at the latest by April 2010. This document includes Amendment 1, approved by CEN on 2009-07-23. This document supersedes EN 12505:2000. The start and finish of text introduced or al
19、tered 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 inform
20、ative Annexes ZA and ZB, which are integral parts of this document.“ According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia,
21、 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 12505:2000+A1:2009 EN 12505:2000+A1:2009 (E) 4 Introduction !This docume
22、nt is a type C standard as stated in EN ISO 12100. The machinery concerned and the extent to which hazard, hazardous situation and hazardous event are covered are indicated in the scope of this document. When provisions of this type C standard are different from those which are stated in type A or B
23、 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 C standard. This European Standard is independent of EN 12547 because it deals specifically with the requi
24、rements of the processing of edible oils and fats. EN 12547 is included in the Annex D “Bibliography“.“ 1 Scope This European Standard covers all significant hazards as identified by risk assessment (see EN 1050), which are listed in clause 4 of this standard, relevant to centrifuges for processing
25、edible oils and fats, when they are used as intended and under the conditions foreseen by the manufacturer. It specifies safety and hygiene requirements for the design, manufacture, use, maintenance and cleaning of centrifugal machines. The normal operating methods are described in 3.2. This standar
26、d does not apply to machines using solvent extraction and ancillary machines (e.g. conveyors, hoppers, etc.). It is not applicable to basket centrifuges. This European Standard is applicable primarily to machines which are manufactured after the date of approval by CEN. 2 Normative references !The f
27、ollowing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documents (including any amendments) applies.“ !deleted text“ EN 294:1992, Safety of machinery - Sa
28、fety distances to prevent danger zones being reached by the upper limbs !EN 614:2006, Safety of machinery Ergonomic design principles Part 1: Terminology and general principles“ !deleted text“ EN 953:1997, Safety of machinery - General requirements for the design and construction of guards fixed, mo
29、vable) BS EN 12505:2000+A1:2009 EN 12505:2000+A1:2009 (E) 5 !deleted text“ !EN 1005-2:2003, Safety of machinery Human physical performance Part 2: Manual handling of machinery and component parts of machinery“ !EN 1005-3:2002, Safety of machinery Human physical performance Part 3: Recommended force
30、limits for machinery operation“ EN 1037:1995, Safety of machinery - Prevention of unexpected start-up EN 1050:1996, Safety of machinery - Principles of risk assessment !EN 1672-2:2005, Food processing machinery Basic concepts Part 2: Hygiene requirements“ !EN 60204-1:2006, Safety of machinery Electr
31、ical equipment of machines Part 1: General requirements“ !deleted text“ EN 60529:1991, Classification of degree of protection provided by enclosures (code IP) EN ISO 3744:1995, Acoustic - Determination of sound power levels of noise sources Engineering method employing and enveloping measurement sur
32、face in an essentially free field over a reflecting plane EN ISO 4871:1996, Acoustic - Verification and declaration of noise emission values of machinery and equipment EN ISO 11201:1995, Acoustic - Noise emitted by machinery and equipment - Measure of emission sound pressure levels at the work stati
33、on and at other specified positions Engineering method in an essentially free fields over a reflecting plane EN ISO 11688-1, Acoustic - Recommended practice for the design of low noise machinery and equipment, Part 1: Planning !EN ISO 12100-1:2003, Safety of machinery Basic concepts, general princip
34、les 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 principles (ISO 12100-2:2003) EN ISO 13849-1:2008, Safety of machinery Safety-related parts of control systems Part 1: Gen
35、eral principles for design (ISO 13849-1:2006) EN ISO 13850:2008, Safety of machinery Emergency stop Principles for design (ISO 13850:2006)“ !deleted text“ ISO 468:1982, Surface roughness - Parameters, their values and general rules for specifying requirements !ISO 1940-1:2003, Mechanical vibration B
36、alance quality requirements for rotors in a constant (rigid) state Part 1: Specification and verification of balance tolerances“ !deleted text“ IEC 60651:1979, Sound level meters and Amendment 1:1993 IEC 60804:1985, Integrating-averaging sound level meters BS EN 12505:2000+A1:2009 EN 12505:2000+A1:2
37、009 (E) 6 and Amendment 1:1989 and Amendment 2:1993 3 Definitions and descriptions For the purposes of this Standard, the definitions given in !EN ISO 12100-1:2003“ apply and also the following. 3.1 extraction and separation two methods of centrifugation, carried out by two different centrifugal mac
38、hines: respectively decanter and disc stack centrifuges. 3.2 centrifugal machine it is used for the extraction and separation of edible oils and fats in which, by means of centrifugal force, the incoming product (“feed“) is separated into the different liquid and solid phases. 3.2.1 decanter centrif
39、uge it is used to extract the solid phase from the liquid (oil or oil and water) phase (see Figure 1) The feed enters the machine through a fixed pipe (1) and is distributed on the internal surface of the bowl (2), by centrifugal force. The scroll (3), which rotates at a slightly different speed fro
40、m the bowl, conveys the solid residue to the outlet holes (4). The scraper (5), driven by an electric motor (6) removes the solid residue from the walls of the housing (7). The normal operating method of this centrifuge is of the continuous feeding and discharging of the processed products. The liqu
41、ids pass out from the bowl through special weir holes: for oil phase (8) and for water phase (9). An electric motor (10) drives the bowl by a transmission device (11) (e.g.: pulleys, belts and hydraulic clutch). The scroll is rotated by means of a scroll driving device (12) (e.g.: pulleys, belts and
42、 gear box). 3.2.2 disc stack centrifuge centrifugal machine with vertical axis. It is used to separate oil from water and small quantity of residual solid (see Figures 2 and 3). The feed enters the machine through a fixed vertical pipe (1). Inside the bowl, under the effect of the centrifugal force,
43、 the feed is separated into three layers: residual solid (2), water (3), and oil (4). The feed passes through the discs (5). The liquids pass out from the bowl through weir rings: for oil (6) and for water (7). Oil and water are collected under a fixed bowl cover (8) which acts as a support for the
44、feed pipe (1), and for oil (9) and water (10) outlet pipes. The normal operating method of this centrifuge is of the continuous feeding and discharging of the processed liquid products. On the self-cleaning disc stack centrifuge (see Figure 2) the residual solid can be discharged by a hydraulic disc
45、harging device (11) which permits its ejection, by centrifugal force, whilst the machine is operating. On the manual disc stack centrifuge (see Figure 3) the residual solid can be discharged only when the machine is at rest and after the bowl has been opened. The electric motor (12) drives the bowl
46、by a transmission device (13) (e.g.: a mechanical clutch and gears). BS EN 12505:2000+A1:2009 EN 12505:2000+A1:2009 (E) 7 Figure 1 Decanter centrifuge (informative) BS EN 12505:2000+A1:2009 EN 12505:2000+A1:2009 (E) 8 Figure 2 Disc stack centrifuge - self cleaning discharge version (informative BS E
47、N 12505:2000+A1:2009 EN 12505:2000+A1:2009 (E) 9 Figure 3 Disc stack centrifuge - manual discharge version (informative 3.3 feed: Material to be processed by the centrifugal machines. 3.4 bowl: Rotating part of hollow and asymmetric shape containing the feed. 3.5 scroll: Helicoidal-shaped rotating p
48、art of the decanter centrifuge, situated inside the bowl. 3.6 bowl cover: An element which when closed prevents contact with the working parts and accidental emissions of the feed from the bowl. 3.7 operating speed: It is the working speed of the machine and is dependent on the specific application.
49、 4 List of significant hazards This clause contains all hazards identified by risk assessment as being specific and significant for centrifugal machines used for processing edible oils and fats and which require measures to reduce risk. 4.1 Mechanical hazards The significant hazards are: crushing; shearing; entanglement; BS EN 12505:2000+A1:2009 EN 12505:2000+A1:2009 (E) 10 drawing-in; abrasion; ejection of machine parts; ejection of processed
