BS EN 14175-7-2012 Fume cupboards Fume cupboards for high heat and acidic load《通风橱 高温和强酸性负载用通风橱》.pdf

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1、BSI Standards PublicationBS EN 14175-7:2012Fume cupboardsPart 7: Fume cupboards for high heat and acidic loadIncorporating corrigendum January 2014BS EN 14175-7:2012National forewordThis British Standard is the UK implementation of EN 14175-7:2012. Together with BS EN 14175-1:2003, BS EN 14175-2:200

2、3, BS EN 14175-3:2003, BS EN 14175-4:2004, DD CEN/TS 14175-5:2006 and BS EN 14175-6:2006, it supersedes BS 7258-1:1994, BS 7258-2:1994, BS 7258-3:1994 and BS 7258-4:1994 which are withdrawn.The UK committee advises that prior to purchasing a fume cupboard, a risk assessment should be performed to as

3、sess the risks associated with the substances that are to be manipulated. This would ensure that the fume cupboard is suitable for its intended purpose and that current exposure limits for toxic substances are not exceeded. It is suggested, therefore, that users may need to draw up a specification a

4、ppropriate to their particular requirements, within the overall permissible limits of this standard and the information on installation included in the National Annex. For users with little experience of purchasing fume cupboards, it may be helpful for trade associations, employers bodies or other o

5、rganizations associated with a particular activity to give guidance on a suitable specification. An example would be Building Bulletin 88 from the Architects 91.140.30Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the author

6、ity of the Standards Policy and Strategy Committee on 31 July 2012.Amendments/corrigenda issued since publicationDate Text affected31 January 2014 Addition of supersession details, national foreword text and national annexBRITISH STANDARDEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14175-7 M

7、ay 2012 ICS 71.040.10 English Version Fume cupboards - Part 7: Fume cupboards for high heat and acidic load Sorbonnes - Partie 7: Sorbonnes pour charge thermique et acide leve Abzge - Teil 7: Abzge fr hohe thermische und Surelasten (Abrauchabzge) This European Standard was approved by CEN on 27 Apri

8、l 2012. 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 obtai

9、ned on application to the CEN-CENELEC 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

10、-CENELEC 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,

11、Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rig

12、hts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14175-7:2012: EBS EN 14175-7:2012EN 14175-7:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 42 Normative references 43 Terms and definitions .54 Fume cupboards for high heat load.54.1

13、Basic safety and performance objectives .54.2 Materials .54.3 Safety requirements 64.4 Testing 64.5 Services 84.6 Product manual 84.7 Marking and labelling 84.8 Declaration of conformity .85 Fume cupboards for high heat load and acidic digestions .85.1 Basic safety and performance objectives .85.2 M

14、aterials .95.3 Safety requirements 95.4 Testing 95.5 Services 95.6 Product manual 95.7 Marking and labelling . 105.8 Declaration of conformity 106 Fume cupboards for perchloric acid 106.1 Basic safety and performance objectives 106.2 Materials 106.3 Safety requirements . 106.4 Testing . 116.5 Servic

15、es . 116.6 Product manual . 116.7 Marking and labelling . 126.8 Declaration of conformity 127 Fume cupboards for hydrofluoric acid . 127.1 Basic safety and performance objectives 127.2 Materials 127.3 Safety requirements . 127.4 Testing . 127.5 Services . 127.6 Product manual . 137.7 Marking and lab

16、elling . 137.8 Declaration of conformity 13Bibliography . 14BS EN 14175-7:2012EN 14175-7:2012 (E) 3 Foreword This document (EN 14175-7:2012) has been prepared by Technical Committee CEN/TC 332 “Laboratory equipment”, the secretariat of which is held by DIN. This European Standard shall be given the

17、status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2012, and conflicting national standards shall be withdrawn at the latest by November 2012. Attention is drawn to the possibility that some of the elements of this document may be t

18、he subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. EN 14175 consists of the following parts, under the general title Fume cupboards: Part 1: Vocabulary Part 2: Safety and performance requirements Part 3: Type test methods Part

19、 4: On-site test methods Part 6: Variable air volume fume cupboards Part 7: Fume cupboards for high heat and acidic load Part 5 (Recommendations for installation and maintenance) has been published as Technical Specification CEN/TS 14175-5. According to the CEN/CENELEC Internal Regulations, the nati

20、onal 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,

21、 Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 14175-7:2012EN 14175-7:2012 (E) 4 Introduction The objective of this document is to consider fume cupboards classified for special applications involving high heat load and/or str

22、ong acidic load requiring additional construction, safety, operating and maintenance features to those identified in EN 14175-1 to EN 14175-6. The use of these special application fume cupboards instead of general purpose fume cupboards is usually the result of a risk assessment. 1 Scope This Europe

23、an Standard applies for fume cupboards for high heat load; fume cupboards for high heat load in combination with acidic digestions; fume cupboards for handling of perchloric acid; fume cupboards for handling of hydrofluoric acid. This European Standard applies in conjunction with EN 14175-1 to EN 14

24、175-4 and, where appropriate, to EN 14175-6 and specifies supplementary information relevant to vocabulary, safety and performance requirements, type test methods, on-site test methods and marking of the listed special purpose fume cupboards. NOTE EN 14175-6 applies for variable air volume fume cupb

25、oards. Experience shows that fume cupboards for high heat load offer much safer working conditions when operated with fixed air volume flow. This European Standard does not apply for microbiological safety cabinets, recirculatory filtration fume cupboards and fume cupboards for carrying out work on

26、radioactive materials. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced docume

27、nt (including any amendments) applies. EN 14175-1:2003, Fume cupboards Part 1: Vocabulary EN 14175-2, Fume cupboards Part 2: Safety and performance requirements EN 14175-3, Fume cupboards Part 3: Type test methods EN 14175-4, Fume cupboards Part 4: On-site test methods EN 14175-6, Fume cupboards Par

28、t 6: Variable air volume fume cupboards BS EN 14175-7:2012EN 14175-7:2012 (E) 5 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14175-1:2003 and the following apply. 3.1 fume cupboard for high heat load special purpose fume cupboard designed to withst

29、and high heat loads within the workspace EXAMPLE Heat sources of 4 kW and above per meter inner width of the fume cupboard can be considered as high heat loads. 3.2 fume cupboard for high acidic load special purpose fume cupboard designed to withstand high heat loads in combination with acidic diges

30、tions within the workspace EXAMPLE Hydrochloric acid/nitric acid digestions for atomic absorption spectroscopy (AAS) or Kjeldahl digestions. 3.3 fume cupboard for perchloric acid special purpose fume cupboard designed to withstand the use of perchlorates within the workspace 3.4 fume cupboard for hy

31、drofluoric acid special purpose fume cupboard designed to withstand the use of fluorides within the workspace 3.5 acid scrubbing eliminator device, method or process to remove or reduce acid contained within the extract air 3.6 acid wash down device, method or process to remove or reduce the effects

32、 of acid on the ductwork, including the build-up of deposits 4 Fume cupboards for high heat load 4.1 Basic safety and performance objectives In accordance with EN 14175-2 with the following supplement: the design and construction of the fume cupboard shall ensure the safety and performance objective

33、s when high heat loads are present in the workspace. 4.2 Materials In accordance with EN 14175-2 with the following supplements: The selection of materials, whether they are glass, plastics or from other kind, shall ensure suitability against chemical erosion and thermal deformation at the temperatu

34、re of use. NOTE If glass is used for the front sash, authorities or purchasers in some European countries require laminated safety glass in accordance with the definition given in EN ISO 12543-1:2011, 3.2. BS EN 14175-7:2012EN 14175-7:2012 (E) 6 4.3 Safety requirements 4.3.1 Construction In accordan

35、ce with EN 14175-2 with the following supplement: Sash materials and design shall be such that the temperature within the workspace does not affect the sash operation and safety. 4.3.2 Airflow In accordance with EN 14175-2 with the following supplement: Effects on airflow caused by thermal loads and

36、 location of heating appliances within the workspace shall be considered and limited. Type testing shall be performed in accordance with 4.4. 4.3.3 Air flow indicator Fume cupboards for high thermal load shall be equipped with a fume cupboard function display with an acoustic and a visual alarm acco

37、rding to EN 14175-2. A red light located in the optical field of the fume cupboards user for example, can be used for the visual alarm. It should be possible to relay the alarm. NOTE General requirements for visual danger warnings are specified in EN 842. When choosing and placing sensors, special a

38、ttention should be turned to the heat influence on and the corrosion resistance of sensors and, if need be, control elements within the extract air system. 4.3.4 Maximum temperature alarm Fume cupboards for high thermal load shall be equipped with a temperature sensor in the top of the fume cupboard

39、 with an alarm showing when the maximum exhaust air temperature as specified in the product manual is exceeded. It should be possible to relay the alarm. 4.4 Testing Type testing shall be performed according to EN 14175-3 and on-site testing according to EN 14175-4 with the following supplement. Dur

40、ing the tests two heating plates shall be in the fume cupboards workspace. These heating plates with a height of about 100 mm shall be designed and arranged as shown in Figure 1. Containment and robustness shall each be tested without thermal load (heating plates switched-off) and with a thermal loa

41、d of 4 kW per meter internal clear width. The test gas injectors in accordance with EN 14175-3 shall be positioned in one level going through the front edge of the heating plates. When appropriate, the two outside test gas injectors may be turned. Select the heating plate surface as the reference he

42、ight for the test gas injector grid in accordance with EN 14175-3. Switch-on the heating plates and allow the temperature inside the workspace of the fume cupboard to stabilize before performing the tests in accordance with EN 14175-3 or EN 14175-4, usually about 1 h. BS EN 14175-7:2012EN 14175-7:20

43、12 (E) 7 Dimensions in millimetres Key 1 to 9 test gas injectors and grid in accordance with EN 14175-3:2003, 5.3.1.5 and 5.3.4.1 10,11 heating plates H heating plate width and depth, (43010) mm h heating plate height, (10010) mm W internal clear width of the fume cupboard D internal clear depth of

44、the fume cupboard from the plane of the sash to the rear (wall or baffle), measured at the height of the upper surface of the heating plates T test sash opening (height) w = (W - (2 x H) / 3 d = (D - H) / 3 Figure 1 Arrangement of heating plates and test gas injectors BS EN 14175-7:2012EN 14175-7:20

45、12 (E) 8 4.5 Services According to EN 14175-2 with the following exception: Electrical sockets shall not be installed in the fume cupboards workspace. NOTE Not all European countries allow the electrical sockets to be placed below the work surface. 4.6 Product manual In accordance with EN 14175-2. T

46、he following items shall be included: a) Preventative maintenance which may be needed in addition to regular testing and maintenance. b) Advice how to protect the work surface from radiant heat. c) Best spot(s) to locate heating plate(s), e. g. with sufficient distance from the rear panel, to ensure

47、 containment and robustness of the fume cupboard for high heat load. d) Maximum exhaust air temperature in the top of the fume cupboard up to which the performance objectives of the fume cupboard will still be met. 4.7 Marking and labelling According to EN 14175-2 with the following alteration: Info

48、rmation about conformity on the fume cupboard by labelling “EN 14175-7 High Heat Load“ instead of “EN 14175-2“. 4.8 Declaration of conformity A declaration of conformity shall clearly state the temperature range at which the fume cupboard for high heat load may be used and that the materials and con

49、struction of the fume cupboard are suitable for this temperature range. 5 Fume cupboards for high heat load and acidic digestions 5.1 Basic safety and performance objectives In accordance with EN 14175-2 with the following supplement: The design and construction of the fume cupboard shall ensure the safety and performance objectives when high heat loads are present in the