DIN EN ISO 14372-2011 Welding consumables - Determination of moisture resistance of manual metal arc welding electrodes by measurement of diffusible hydrogen (ISO 14372 2011) Germa.pdf

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1、October 2011 Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS

2、 25.160.20!$u;“1822490www.din.deDDIN EN ISO 14372Welding consumables Determination of moisture resistance of manual metal arc weldingelectrodes by measurement of diffusible hydrogen (ISO 14372:2011)English translation of DIN EN ISO 14372:2011-10Schweizustze Bestimmung der Feuchteresistenz von Elektr

3、oden fr das Lichtbogenhandschweiendurch Messung des diffusiblen Wasserstoffs (ISO 14372:2011)Englische bersetzung von DIN EN ISO 14372:2011-10Produits consommables pour le soudage Dtermination de la reprise dhumidit des lectrodes utilises en soudage manuel larcavec lectrode enrobe, par mesurage de l

4、hydrogne diffusible (ISO 14372:2011)Traduction anglaise de DIN EN ISO 14372:2011-10SupersedesDIN EN ISO 14372:2002-02www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1010.11DIN EN ISO 14372:2011-10 2 A comma is used as the decimal m

5、arker. National foreword This standard has been prepared by the International Institute of Welding (IIW), Commission II “Arc Welding and Filler Metals” and Technical Committee ISO/TC 44 “Welding and allied processes” in collaboration with Technical Committee CEN/TC 121 “Welding” (Secretariat: DIN, G

6、ermany). The responsible German body involved in its preparation was the Normenausschuss Schweitechnik (Welding Standards Committee), Working Committee NA 092-00-03 AA Schweizustze (DVS AG W 5). Requests for official interpretations of any aspect of this International Standard should be addressed to

7、 the ISO Central Secretariat, which will pass them on to the IIW Secretariat for an official response. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 3690 DIN EN ISO 3690 Amendments This standard differs from DIN EN ISO 14372:2002-02 as f

8、ollows: a) the standard has been editorially revised; b) the scope has been restricted; c) Subclause 4.2 relating to the temperature control cabinet has been rendered more precise; d) Clause 6 “Test report” has been extended. Previous editions DIN EN ISO 14372: 2002-02 National Annex NA (informative

9、) Bibliography DIN EN ISO 3690, Welding and allied processes Determination of hydrogen content in ferritic arc weld metal EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14372 July 2011 ICS 25.160.20 Supersedes EN ISO 14372:2001English Version Welding consumables - Determination of moisture

10、 resistance of manual metal arc welding electrodes by measurement of diffusible hydrogen (ISO 14372:2011) Produits consommables pour le soudage - Dtermination de la reprise dhumidit des lectrodes utilises en soudage manuel larc avec lectrode enrobe, par mesurage de lhydrogne diffusible (ISO 14372:20

11、11) Schweizustze - Bestimmung der Feuchteresistenz von Elektroden fr das Lichtbogenhandschweien durch Messung des diffusiblen Wasserstoffs (ISO 14372:2011) This European Standard was approved by CEN on 30 June 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stip

12、ulate 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-CENELEC Management Centre or to any CEN member. This European

13、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 has the same status as the official versions. CEN members are the

14、 national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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, Sw

15、itzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. N

16、o. EN ISO 14372: EContents DIN EN ISO 14372:2011-10 EN ISO 14372:2011 (E) 2 Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Principle5 4 Equipment 5 5 Procedure .7 5.1 Preparation of humidity box .7 5.2 Preparation of temperature control cabinet7 5.3 Preconditioning of humidity b

17、ox7 5.4 Electrode preparation7 5.5 Exposure of electrodes in humidity box .7 5.6 Measurement of weld deposit hydrogen.8 6 Test report 8 Foreword collaboration with Technical Committee CEN/TC 121 “Welding” the secretariat of which is held by DIN. This European Standard shall be given the status of a

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

19、patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 14372:2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Eu

20、ropean Standard: Austria, Belgium, Bulgaria, Croatia, 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

21、 the United Kingdom. Endorsement notice The text of ISO 14372:2011 has been approved by CEN as a EN ISO 14372:2011 without any modification. This document (EN ISO 14372:2011) has been prepared by IIW International Institute of Welding” in “DIN EN ISO 14372:2011-10 EN ISO 14372:2011 (E) 3 Introductio

22、n This test method is based on procedures originally put forward within Sub-commission II-A of the International Institute of Welding (IIW) by the delegation from Argentina. It was subsequently evaluated in a round robin exercise within IIW Sub-commission II-A, and served as the basis for ISO 14372:

23、2000. This International Standard was developed with Sub-commissions II-A and II-E of the International Institute of Welding (IIW). DIN EN ISO 14372:2011-10 EN ISO 14372:2011 (E) 4 1 Scope This International Standard specifies a method for the relative ranking, by 24 h exposure to humid air and subs

24、equent diffusible hydrogen testing, of manual metal arc electrode coatings related to their tendency to absorb moisture. This test method has limited potential applicability since it is unlikely to be capable of being scaled up for large volumes of testing. 2 Normative references The following refer

25、enced 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 document (including any amendments) applies. ISO 3690, Welding and allied processes Determination of hydrogen con

26、tent in arc weld metal1)3 Principle This procedure is presented as a standard method for exposure and control of welding consumables in preparation for, and during, diffusible hydrogen testing. After drying (if applicable), the electrodes are exposed to an air atmosphere of controlled temperature an

27、d humidity 27 C, 80 % relative humidity2)(RH) by enclosing them in a box containing a saturated solution of ammonium sulfate. 4 Equipment 4.1 Humidity box, made of acrylic or similar inert material, consisting of a box within which test electrodes, a thermometer, and protecting tubes (maximum 1,5d,

28、where d is the overall diameter of the electrode, and appropriate length to fit) for holding the electrodes after exposure can be suspended over a saturated solution of ammonium sulfate (see Figure 1). IMPORTANT Any attempt to measure relative humidity, if used, shall not cause air circulation withi

29、n the humidity box. 4.2 Temperature control cabinet, capable of being maintained at a temperature of 27 C 1 C. Good results have been achieved using a draught-proof enclosure heated by low-power (40 W) light bulbs, controlled by a calibrated thermostat, or by another suitable thermal source, with a

30、fan for circulating air to maintain uniform air temperature. 1) To be published. (Revision of ISO 3690:2000.) 2) It is not necessary to measure relative humidity within the humidity box. The test conditions are the temperature and the presence of the saturated salt bath. Well-established physical pr

31、inciples relate the relative humidity to these two conditions. DIN EN ISO 14372:2011-10 EN ISO 14372:2011 (E) 5 Dimensions in millimetres Key 1 packing 3 electrodes 5 saturated ammonium sulfate solution 2 protecting tubes 4 thermometer 6 plugs Figure 1 Sketch of a humidity box DIN EN ISO 14372:2011-

32、10 EN ISO 14372:2011 (E) 6 5 Procedure 5.1 Preparation of humidity box 5.1.1 Wash all tubes with distilled water. 5.1.2 Air dry tubes. 5.1.3 Seal one end of each tube with a plug. 5.1.4 Dissolve 1,3 kg anhydrous ammonium sulfate in 1 500 ml distilled water at 40 C to 45 C. 5.1.5 Fill the humidity bo

33、x (4.1) with this solution (5.1.4) to a depth of 20 mm to 25 mm. If the height of solution drops, transfer solution to a mixing vessel, add further saturated solution or distilled water at 45 C, mixing thoroughly. Refill the box to a depth of 25 mm, ensuring that undissolved ammonium sulfate is pres

34、ent, but does not reduce the surface area of the liquid when restored to the operating temperature of 27 C. 5.1.6 A finger moistened with silicone oil may be run around the box just above solution level. (This helps prevent crystals creeping up the walls.) 5.1.7 Allow solution to cool to 27 C 1 C. 5

35、.1.8 Insert protecting tubes, second end plugs (not fitted in tubes) and thermometer, and close lid on box. 5.2 Preparation of temperature control cabinet 5.2.1 Set the temperature to 27 C 1 C. 5.2.2 Hold the temperature at 27 C 1 C for at least 90 min. 5.3 Preconditioning of humidity box Keep the p

36、repared and sealed box in the temperature control cabinet for at least 4 h, with the temperature maintained at 27 C 1 C. 5.4 Electrode preparation 5.4.1 Mark coatings near the stub end with a unique identity. 5.4.2 Pre-dry (if appropriate) according to manufacturers instructions. 5.4.3 If electrodes

37、 have been dried at elevated temperature, seal in glass tubes using tightly fitting rubber bungs or by melting the ends, or place in a desiccator to cool to room temperature. 5.5 Exposure of electrodes in humidity box 5.5.1 Open the temperature control cabinet (4.2) door. 5.5.2 Open humidity box lid

38、. 5.5.3 Transfer electrodes from glass tubes, desiccator, or manufacturers packaging, as appropriate, to the humidity box as indicated in Figure 1. 5.5.4 The procedures specified in 5.5.1 to 5.5.3 shall be completed within 90 s. 5.5.5 Replace humidity box lid. DIN EN ISO 14372:2011-10 EN ISO 14372:2

39、011 (E) 7 5.5.6 Close temperature control cabinet door. 5.5.7 The procedures specified in 5.5.5 and 5.5.6 shall be completed within a further 30 s. 5.5.8 Expose electrodes at 27 C 1 C for 24 h. 5.6 Measurement of weld deposit hydrogen 5.6.1 Open temperature control cabinet door. 5.6.2 Open humidity

40、box lid. 5.6.3 Insert electrodes into protection tubes, seal ends with plugs, and remove from temperature control cabinet. 5.6.4 The procedures specified in 5.6.2 and 5.6.3 shall be completed within 60 s. 5.6.5 Close humidity box and temperature control cabinet door. 5.6.6 Transfer electrodes in sea

41、led tubes to welding station. Electrodes shall be welded within 24 h of removal from the humidity box. 5.6.7 Weld and analyse for hydrogen in accordance with ISO 3690. Welding shall take place within 2 min of removal of electrodes from the sealed tubes. 5.6.8 Record ambient room temperature and rela

42、tive humidity (RH) at the time of welding. 6 Test report The test report shall contain at least the following information: a) the weld deposit hydrogen levels, expressed in millilitres per 100 g deposited metal, as measured; b) a reference to this International Standard (ISO 14372:2011); c) trade na

43、me of the electrodes tested; d) electrode designation; e) electrode size; f) electrode drying details (temperature and time at temperature); g) date and time of completion of exposure; h) date and time of beginning of test welding; i) measured temperature range during exposure; j) measured duration of exposure; k) information required by ISO 3690; l) temperature and relative humidity at time of welding. DIN EN ISO 14372:2011-10 EN ISO 14372:2011 (E) 8