1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 14372:2011Welding consumables Determination of moistureresistance of manual metalarc welding electrodes bymeasurement of diffusiblehydrogen (ISO 14372:2011)BS EN ISO 14
2、372:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO14372:2011. It supersedes BS EN ISO 14372:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/39, Welding consumables.A list of organizations represen
3、ted 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. BSI 2011ISBN 978 0 580 68395 4ICS 25.160.20Compliance with a British Standard cannot confer immun
4、ity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14372 July 2011 ICS 25.160.20 Supersedes EN IS
5、O 14372:2001English Version Welding consumables - Determination of moisture 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 la
6、rc avec lectrode enrobe, par mesurage de lhydrogne diffusible (ISO 14372:2011) 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 membe
7、rs 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 obtained on applicatio
8、n 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-CENELEC Manageme
9、nt 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, Malta, Netherland
10、s, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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 an
11、y form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14372: EBS EN ISO 14372:2011EN ISO 14372:2011 (E) 3 Foreword This document (EN ISO 14372:2011) has been prepared by IIW “International Institute of Welding“ in collaboration with Technical Committee CEN/TC 121 “Weld
12、ing” 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 January 2012, and conflicting national standards shall be withdrawn at the latest by January 2012. Att
13、ention 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 supersedes EN ISO 14372:2001. According to the CEN/CENELEC Internal Regulat
14、ions, 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta
15、, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and 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. BS EN ISO 14372:2011ISO 14372:2011(E) ISO 2011 All rights r
16、eserved iiiForeword ISO (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. Each member body interested in a subject fo
17、r 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 International Electrotechnical Commission (IEC) on
18、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 Standards adopted by the technical committees ar
19、e 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 patent rights. ISO shall not be held r
20、esponsible for identifying any or all such patent rights. ISO 14372 was prepared by the International Institute of Welding, recognized as an international standardizing body in the field of welding in accordance with Council Resolution 42/1999. This second edition cancels and replaces the first edit
21、ion (ISO 14372:2000), which has been technically revised. Requests for official interpretations of any aspect of this International Standard should be directed to the ISO Central Secretariat, who will forward them to the IIW Secretariat for an official response. BS EN ISO 14372:2011ISO 14372:2011(E)
22、 iv ISO 2011 All rights reservedIntroduction 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 I
23、I-A, and served as the basis for ISO 14372:2000. This International Standard was developed with Sub-commissions II-A and II-E of the International Institute of Welding (IIW). BS EN ISO 14372:2011INTERNATIONAL STANDARD ISO 14372:2011(E) ISO 2011 All rights reserved 1Welding consumables Determination
24、of moisture resistance of manual metal arc welding electrodes by measurement of diffusible hydrogen 1 Scope This International Standard specifies a method for the relative ranking, by 24 h exposure to humid air and subsequent diffusible hydrogen testing, of manual metal arc electrode coatings relate
25、d 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 referenced documents are indispensable for the application of this document. For dated
26、 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 content in arc weld metal1)3 Principle This procedure is presented as a standard met
27、hod 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 and humidity 27 C, 80 % relative humidity2)(RH) by enclosing them in a box containi
28、ng 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, where d is the overall diameter of the electrode, and appropriate length to fit)
29、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 within the humidity box. 4.2 Temperature control cabinet, capable of being maintained
30、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 fan for circulating air to maintain uniform air temperature. 1) To be published.
31、(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 principles relate the relative humidity to these two conditions. BS EN ISO 14372:20
32、11ISO 14372:2011(E) 2 ISO 2011 All rights reservedDimensions 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 BS EN ISO 14372:2011ISO 14372:2011(E) ISO 2011 All rights reserved 35 Procedure 5.1
33、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 box (4.1) with this solution (5.1.4) to a dep
34、th 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 present, but does not reduce the surface area o
35、f 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. 5.1.8 Insert protecting tubes, second end pl
36、ugs (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 prepared and sealed box in the temperature c
37、ontrol 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 have been dried at elevated temperature, s
38、eal 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. 5.5.3 Transfer electrodes from glass tube
39、s, 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. BS EN ISO 14372:2011ISO 14372:2011(E) 4 ISO 2011 All rights reserved5.5.6 Close te
40、mperature 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 box lid. 5.6.3 Insert el
41、ectrodes 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 sealed tubes to welding sta
42、tion. 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 relative humidity (RH) at th
43、e 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 name of the electrodes tes
44、ted; 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) informat
45、ion required by ISO 3690; l) temperature and relative humidity at time of welding. BS EN ISO 14372:2011This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing British Standardsand other standards-related publications, informati
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