BS EN ISO 15012-1-2013 Health and safety in welding and allied processes Equipment for capture and separation of welding fume Requirements for testing and marking of separation eff.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 15012-1:2013Health and safety in welding and allied processes Equipment for capture and separation of welding fumePart 1: Requirements for testing and marking of separa

2、tion efficiencyBS EN ISO 15012-1:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO15012-1:2013. It supersedes BS EN ISO 15012-1:2004 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/40, Health and safety in

3、 welding.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI

4、 StandardsLimited 2013ISBN 978 0 580 74472 3ICS 13.040.40; 25.160.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2013.Amendments issued since publicati

5、onDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15012-1 April 2013 ICS 25.160.30 Supersedes EN ISO 15012-1:2004English Version Health and safety in welding and allied processes - Equipment for capture and separation of welding fume - Part 1: Requirements for testing and

6、marking of separation efficiency (ISO 15012-1:2013) Hygine et scurit en soudage et techniques connexes - quipements de captage et de filtration des fumes de soudage - Partie 1: Exigences pour les essais et marquage relatifs lefficacit de la sparation (ISO 15012-1:2013) Arbeits- und Gesundheitsschutz

7、 beim Schweien und bei verwandten Prozessen - Einrichtungen zum Erfassen und Abscheiden von Schweirauch - Teil 1: Anforderungen an den Abscheidegrad sowie Prfung und Kennzeichnung des Abscheidegrades (ISO 15012-1:2013) This European Standard was approved by CEN on 1 March 2013. CEN members are bound

8、 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

9、-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-CENELEC Management Centre ha

10、s 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lu

11、xembourg, 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 2013 C

12、EN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 15012-1:2013: EBS EN ISO 15012-1:2013EN ISO 15012-1:2013 (E) 3 Foreword This document (EN ISO 15012-1:2013) has been prepared by Technical Committee CEN/TC 121 “Welding” the secret

13、ariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 44 “Welding and allied processes“. 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 October 2013, and conflicting nat

14、ional standards shall be withdrawn at the latest by October 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supers

15、edes EN ISO 15012-1:2004. 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic

16、 of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 15012-1:2013 has been appr

17、oved by CEN as EN ISO 15012-1:2013 without any modification. BS EN ISO 15012-1:2013ISO 15012-1:2013(E) ISO 2013 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Requirement . 25 Principle 26 Equipment . 27 Test method . 57.1

18、 Selection of test arrangement 57.2 Test conditions 57.3 Procedure 57.4 Calculation of the separation efficiency 98 Accuracy of measurement 99 Marking 9Annex A (normative) Label for welding fume separation equipment 10Annex B (informative) Welding fume source 11Annex C (informative) Test cabin 13Bib

19、liography .14BS EN ISO 15012-1:2013ISO 15012-1:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. E

20、ach member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the Internati

21、onal Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standard

22、s adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of

23、 patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 15012-1 was prepared by the European Committee for Standardization (CEN), in collaboration with ISO Technical Committee TC 44, Welding and allied processes, Subcommittee SC 9, , in accordance with the

24、 Agreement on technical cooperation between ISO and CEN (Vienna Agreement).This second edition cancels and replaces the first edition (ISO 15012-1:2004), which has been technically revised.ISO 15012 consists of the following parts, under the general title Health and safety in welding and allied proc

25、esses Equipment for capture and separation of welding fume : Part 1: Requirements for and testing and marking of separation efficiency Part 2: Determination of the minimum air volume flow rate of captor hoods and nozzlesThe following part is under preparation: Part 4: Design requirementsiv ISO 2013

26、All rights reservedBS EN ISO 15012-1:2013ISO 15012-1:2013(E)IntroductionIt is common practice in the fabrication industry to control exposure to welding fume using local exhaust ventilation equipment that, following capture and separation of the fume, returns the extracted air to the workplace or ex

27、hausts it to the atmosphere. It is important that such equipment has high separation efficiency so that as little fume as possible is recirculated or exhausted. This part of ISO 15012 has therefore been promulgated to specify requirements and a test method for determining the efficiency of welding f

28、ume separation equipment. ISO 2013 All rights reserved vBS EN ISO 15012-1:2013BS EN ISO 15012-1:2013Health and safety in welding and allied processes Equipment for capture and separation of welding fume Part 1: Requirements for testing and marking of separation efficiency1 ScopeThis part of ISO 1501

29、2 specifies a method for testing equipment for the separation of welding fume in order to determine whether its separation efficiency meets specified requirements.The method specified does not apply to testing of filter cartridges independent of the equipment in which they are intended to be used.Th

30、is part of ISO 15012 applies to equipment that is manufactured after its publication.2 Normative referencesThe following 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 th

31、e referenced document (including any amendments) applies.ISO 2602, Statistical interpretation of test results Estimation of the mean Confidence intervalISO 15011-1, Health and safety in welding and allied processes Laboratory method for sampling fume and gases Part 1: Determination of fume emission

32、rate during arc welding and collection of fume for analysis3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1local exhaust ventilationLEVuse of extraction to remove contaminated air at or near to its source3.2welding fume separation equipmentair f

33、iltration equipment, the purpose of which is to separate particles generated by welding and allied processes from workplace air3.3filter cleaning systemsystem designed to clean the filter of welding fume separation equipment in order to restore the air flow rate through the filter when it is reduced

34、 by an accumulation of welding fume particlesINTERNATIONAL STANDARD ISO 15012-1:2013(E) ISO 2013 All rights reserved 1BS EN ISO 15012-1:2013ISO 15012-1:2013(E)3.4separation efficiency by massratio of the mass of particles retained by welding fume separation equipment to the mass of particles enterin

35、g the equipment during a given periodNote 1 to entry: See also EN 1093-610and EN 1093-7.113.5emission ratemass of the particles emitted by the welding fume source per timeNote 1 to entry: Emission rate is expressed in milligrams per second.Note 2 to entry: See Annex B.3.6free-standing unitseparation

36、 equipment with an integrated fan3.7modular systemseparation equipment consisting of a filter box, or multiple filter boxes, connected to a single fan4 RequirementWhen tested in accordance with the procedure described in Clause 7, welding fume separation equipment shall have a lower confidence limit

37、 value of separation efficiency 99 %.5 PrincipleThe method is based on the methods specified in EN 1093-610and EN 1093-7.11The welding fume separation equipment under test is operated under defined conditions, according to its intended use.The emission rate of a welding fume source is measured and u

38、sed subsequently to calculate the concentration of fume generated during a test period when separation efficiency is measured.Before separation efficiency measurements are made, welding fume is generated using the welding fume source and separated for a period of 30 min.For equipment with filters th

39、at are not intended to be cleaned, the concentration of fume passing through the separation equipment during a 30 min period is measured and used together with the fume concentration calculated from the fume emission rate to determine the separation efficiency.For equipment with cleanable filters, a

40、n additional separation efficiency measurement is performed after a further welding period without measurement and filter cleaning. The average of the two separation efficiencies is calculated.Two tests are performed and the average, the 95 % one-sided confidence interval and the lower confidence li

41、mit value of the separation efficiency are calculated according to ISO 2602. If the resulting lower confidence limit value is less than the required separation efficiency, consideration shall be given to performing further tests.6 Equipment6.1 Welding fume source, capable of maintaining an emission

42、rate of 10 mg/s 2 mg/s throughout the test period. The welding fume source shall be fitted with an extracted fume hood that retains all the fume emitted and shall be designed in such a way that it can be connected to the inlet duct of the test cabin, as described in Figure 1, or directly to welding

43、fume separation equipment with a ducted outlet, as described 2 ISO 2013 All rights reservedBS EN ISO 15012-1:2013ISO 15012-1:2013(E)in Figure 2. It shall be possible to determine the welding fume emission rate in situ without disturbing the welding set-up in any way. An example of a suitable welding

44、 source and parameters required to achieve the required welding fume emission rate are described in Annex B.6.2 Test cabin, consisting of an enclosure for the welding fume separation equipment under test, connected to the welding fume source via an upstream measurement duct. The cabin is connected t

45、o a downstream measurement duct and an air mover (see Figure 1). The air flow rate through the air mover is adjusted to between 95 % and 100 % of the air flow rate in the upstream duct, thus ensuring a small positive air pressure in the cabin.Key1 welding fume source (see Figure B.1)2 welding fume s

46、eparation equipment3 test cabin with funnel shaped outlet4 air mover5 position for measuring the air flow rate in the upstream duct, qV, 16 positions for measuring the air flow rate in the downstream duct, qV, 2and isokinetic sampling of welding fume in the downstream duct7 damper (to control the ai

47、r flow rate passing through the welding fume source in order to avoid shielding gas disturbance)8 damper (to ensure that all welding fume is captured, even when filter units with a low air flow rate are under test)9 damper (to regulate the total air flow rate passing through the separation equipment

48、)10 damper (to control the air flow rate in the downstream duct in order to achieve a slight overpressure in the cabin)11 gap with a flap (to prevent damage on the cabin in case of high overpressure)d1upstream duct diameterd2downstream duct diameterFigure 1 Example of test cabin (schematic layout) I

49、SO 2013 All rights reserved 3BS EN ISO 15012-1:2013ISO 15012-1:2013(E)The positions for measuring the air flow rate and isokinetic sampling of welding fume in the downstream duct are not the same, but are shown thus in Figure 1 for convenience. The requirement is that they comply with the dimensions marked in Figure 1.6.3 Test arrangement for welding fume separation equipment with a ducted outlet, consisting of a welding fume source connected to the equipment via an upstream measurement duct. The outlet of the welding