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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1673:2000 The Europ
2、ean Standard EN 1673:2000 has the status of a British Standard ICS 67.260 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Food processing machinery Rotary rack ovens Safety and hygiene requirements Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:44:12 GMT+00:00 2006,
3、 Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 November 2000 BSI 11-2000 ISBN 0 580 36345 7 BS EN 1673:2000 Amendments issued sin
4、ce publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 1673:2000. The UK participation in its preparation was entrusted by Technical Committee MCE/3, Safeguarding of machinery, to Subcommittee MCE/3/5, Food industry machines - Safet
5、y, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the
6、 UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled
7、 International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with
8、 a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 46, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when th
9、e document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:44:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1673 September 2000 ICS 67.260; 97.040.20 English version Food processing machinery - Rotary rack ovens - Safety
10、 and hygiene requirements Machines pour les produits alimentaires - Fours chariot rotatif - Prescriptions relatives la scurit et lhygine Nahrungsmittelmaschinen - Stikken-Backfen - Sicherheits- und Hygieneanforderungen This European Standard was approved by CEN on 11 June 2000. CEN members are bound
11、 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
12、tral Secretariat 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 Central Secretariat has the same status as
13、 the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZAT
14、ION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1673:2000 E Licensed Copy: sheffieldun sheffieldun, na,
15、Fri Nov 17 08:44:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 1673:2000 Contents Foreword 3 0Introduction 4 1Scope 4 2Normative references.4 3Description6 4List of hazards8 4.1Mechanical hazards8 4.2Electrical hazards.9 4.3Thermal hazards 9 4.4Explosion and fire hazards .9 4.5Hazard from
16、being trapped inside.10 4.6Hazard generated by neglecting hygienic design principles10 4.7Hazards generated by neglecting ergonomic principles10 5Safety and hygiene requirements and/or measures11 5.1Mechanical hazards11 5.2Electrical hazards.13 5.3Thermal hazards 14 5.4Fire hazards due to overheatin
17、g.15 5.5Hazard from beeing trapped inside.15 5.6Hygiene requirements 15 5.7Hazards generated by neglecting ergonomic principles16 6Verification of the safety and hygiene requirements and/or measures17 7Information for use.18 7.1Marking 18 7.2Noise declaration18 Annex A (normative) Principles of desi
18、gn to ensure the cleanability of rotary rack ovens.19 A.1Definitions.19 A.2Materials of construction.19 A.3Design21 Annex B (normative) Noise test code - Grade 2 of accuracy.40 B.1Definitions.40 B.2Installation and mounting conditions.41 B.3Operating conditions.42 B.4Measurements42 B.5Emission sound
19、 pressure level determination.42 B.6Sound power level determination42 B.7Measurement uncertainties 43 B.8Information to be recorded .43 B.9Information to be reported43 B.10Declaration and verification of noise emission values.43 Annex C (informative) Bibliography 45 Annex ZA (informative) Clauses of
20、 this European Standard addressing essential requirements or other provisions of EU Directives .46 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:44:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 1673:2000 Foreword This European Standard has been prepared by Technical Committee C
21、EN/TC 153 “Food processing machinery - Safety and hygiene specifications“, 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 March 2001, and conflicting nati
22、onal standards shall be withdrawn at the latest March 2001. 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 inf
23、ormative Annex ZA, which is an integral part of this 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, Czech Republic, Denmark, Finland, France, Germany, Greece
24、, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:44:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 1673:2000 0Introduction The extent to which hazards are covere
25、d is indicated in the scope of this standard. In addition, machinery shall comply as appropriate with EN 292 for hazards which are not covered by this standard. 1Scope This standard specifies safety and hygiene requirements for the design and manufacture of rotary rack ovens with one or more rotary
26、racks. These ovens are used in the food industry and shops (bakeries, pastry-making, etc.) for the batch baking of foodstuffs containing flour, water and other additives. This standard applies to ovens used only for food products except for those containing volatile flammable ingredients. The contro
27、l of the humidity of the air in the baking chamber is by the production and introduction of steam around normal atmospheric pressure. The following machines are excluded : - experimental and testing machines under development by the manufacturer ; - domestic appliances. This standard covers the tech
28、nical safety requirements for the installation, cleaning and maintenance of these machines as defined in 3.12 of EN 292-1:1991 and in the manufacturers instruction handbook. The significant hazards covered by this standard are mechanical (shearing, trapping, impact, loss of stability), electrical, t
29、hermal, ergonomic and those resulting from lack of hygiene. They are specifically listed in 4. Noise is not considered to be a significant hazard from rotary rack ovens. This does not mean that the manufacturer of the machine is absolved from reducing noise and making a noise declaration. Therefore
30、a noise test code is proposed in Annex B. The hazards from the use of gaseous fuel by gas appliances are not covered by this standard. This standard applies only to machines manufactured after the date of issue of the standard. 2Normative references This European Standard incorporates by dated or un
31、dated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only whe
32、n incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:44:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 1673:2000 EN 292-11991Safety of machinery - Basic conc
33、epts - General principles for design - Part 1 : Basic terminology, methodology. EN 292-2 + A1 1991 1995 Safety of machinery - Basic concepts - General principles for design - Part 2 : Technical principles and specifications. EN 2941992Safety of machinery - Safety distances to prevent danger zones be
34、ing reached by the upper limbs. EN 5631994Safety of machinery - Temperatures of touchable surfaces - Ergonomics data to establish temperature limit values for hot surfaces. EN 614-11995Safety of machinery - Ergonomic design principles - Part 1 : Terminology and general principles. EN 9531997Safety o
35、f machinery - Guards - General requirements for the design and construction of fixed and movable guards. EN 954-11996Safety of machinery - Safety related parts of control systems - Part 1 : General principles for design. EN 10501996Safety of machinery -Principles for risk assessment. EN 10881995Safe
36、ty of machinery - Interlocking devices associated with guards - Principles for design and selection. EN 1672-21997Food processing machinery - Common requirements - Part 2 : Hygiene requirements. EN 60204-11997Safety of machinery - Electrical equipment of machines - Part 1 : General requirements EN 6
37、05291991Degrees of protection provided by enclosures. EN 606511994Sound level meters. EN ISO 3743-11995Acoustics - Determination of sound levels of noise sources - Engineering methods small movable sources in reverberant fields - Part 1 : Comparison method. EN ISO 37441995Acoustics - Determination o
38、f sound power levels of noise sources using sound pressure - Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994). EN ISO 48711996Acoustics - Declaration and verification of noise emission values of machinery and equipment. EN ISO 112011995Acoustics - Noise emitted
39、 by machinery and equipment - Measurement of emission sound pressure levels at the work station and at other specified positions - Engineering method in an essentially free field over a reflecting plane. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:44:12 GMT+00:00 2006, Uncontrolled Cop
40、y, (c) BSI Page 6 EN 1673:2000 EN ISO 11688-11997Acoustics - Recommended practice for the design of low-noise machinery and equipment - Part 1 : Planning. EN ISO 120011996Acoustics - Noise emitted by machinery and equipment - Rules for the drafting and presentation of a noise test code. ISO 4681982S
41、urface roughness - Parameters values and general rules for specifying requirements. 3Description A rotary rack oven usually consists of the following parts (see figure.1) : a) container built with insulated panels ; b) baking chamber with access door ; c) heat production unit ; d) hot air circulatio
42、n system ; e) rack and trays ; f) drive unit for rack rotation ; g) steam generator ; h) steam extractor ; i) control panel ; j) miscellaneous devices (bustion product flue where gas or fuel fired) ; k) device to hold the removable rotary racks. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17
43、 08:44:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 7 EN 1673:2000 Figure 1 : Parts of a rotary rack oven Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:44:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 8 EN 1673:2000 4List of hazards This clause contains those hazards identifie
44、d by risk assessment (see EN 1050) as specific and significant for rotary rack ovens and which require action to reduce risk. 4.1Mechanical hazards The significant mechanical hazards are : - shearing hazard ; - trapping hazard ; - impact hazard ; - loss of stability. The example in figure 2 shows th
45、e danger zones : Zone 1 : rotation of the rack inside the oven hazards of shearing, trapping, impact ; Zone 2 : drive mechanism hazards of shearing, trapping ; Zone 3 : space between the rack and the door frame hazards of shearing, trapping, impact ; All zones : sharp corners and edges on touchable
46、parts hazards of cutting. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:44:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 9 EN 1673:2000 Figure 2 : Danger zones of a rotary rack oven There is also a hazard relating to loss of stability of the trays and of the rack during rotation and
47、 on entering the baking chamber. 4.2Electrical hazards Hazard of electric shock from direct or indirect contact with live components. Hazard of external influences on electrical equipment (e.g. cleaning with water). 4.3Thermal hazards 4.3.1 Escape of steam from the baking chamber on opening the door
48、 creates a hazard of burns. 4.3.2 High temperature of external parts and hand operated components creates a hazard of burns. 4.4Explosion and fire hazards 4.4.1 Overpressure of steam inside the baking chamber creates a hazard of explosion. 4.4.2.1The use in the oven of combustible substances (for ex
49、ample sugar) can create a hazard of fire. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:44:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 10 EN 1673:2000 4.4.2.2Improper operation of control and adjustment components of the combustion equipment can create a hazard of overheating of the oven and of fire. 4.5Hazard from being trapped inside Hazard of burns and suffocation. 4.6Hazard generated by neglecting hygienic design principles The neglection of hygienic principles can create unacceptable modification of foodstuff and therefore a
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