EN ISO 3452-6-2008 en Non-destructive testing - Penetrant testing - Part 6 Penetrant testing at temperatures lower than 10 degrees C《无损检验 渗透测试 第6部分 温度低于10℃的渗透测试》.pdf

1、BS EN ISO3452-6:2008ICS 19.100NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDNon-destructive testing Penetrant testingPart 6: Penetrant testing attemperatures lower than 10 degrees C(ISO 3452-6:2008)This British Standardwas published under theauthority of the S

2、tandardsPolicy and StrategyCommittee on 28 February2009 BSI 2009ISBN 978 0 580 57160 2Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 3452-6:2008National forewordThis British Standard is the UK implementation of EN ISO 3452-6:2008.The UK participation in its preparation was entr

3、usted to TechnicalCommittee WEE/46, Non-destructive testing.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compl

4、iance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 3452-6December 2008ICS 19.100English VersionNon-destructive testing - Penetrant testing - Part 6: Penetranttesting at temperatures lower than 10 degrees C (ISO 3452-6:2008

5、)Essais non destructifs - Examen par ressuage - Partie 6:Examen par ressuage des tempratures infrieures 10degrs C (ISO 3452-6:2008)Zerstrungsfreie Prfung - Eindringprfung - Teil 6:Eindringprfung bei Temperaturen unter 10 Grad C (ISO3452-6:2008)This European Standard was approved by CEN on 8 November

6、 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained

7、on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Ce

8、ntre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland

9、, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any me

10、ans reservedworldwide for CEN national Members.Ref. No. EN ISO 3452-6:2008: EBS EN ISO 3452-6:2008EN ISO 3452-6:2008 (E) 3 Foreword This document (EN ISO 3452-6:2008) has been prepared by Technical Committee CEN/TC 138 “Non-destructive testing“, the secretariat of which is held by AFNOR, in collabor

11、ation with Technical Committee ISO/TC 135 “Non-destructive testing“. 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 June 2009, and conflicting national standards shall be withdrawn at the latest

12、by June 2009. 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. According to the CEN/CENELEC Internal Regulations, the national standard

13、s organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portu

14、gal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN ISO 3452-6:2008ISO 3452-6:2008(E) ISO 2008 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). T

15、he work of preparing International Standards is normally carried out through ISO technical committees. Each 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-go

16、vernmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International 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.

17、 The main task of technical committees is to prepare International Standards. Draft International Standards 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 v

18、ote. 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 responsible for identifying any or all such patent rights. ISO 34526 was prepared by the European Committee for Standardization (CEN) Technical Committee C

19、EN/TC 138, Non-destructive testing, in collaboration with ISO Technical Committee TC 135, Non-destructive testing, Subcommittee SC 2, Surface methods, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). ISO 3452 consists of the following parts, under the

20、 general title Non-destructive testing Penetrant testing: Part 1: General principles Part 2: Testing of penetrant materials Part 3: Reference test blocks Part 4: Equipment Part 5: Penetrant testing at temperatures higher than 50 C Part 6: Penetrant testing at temperatures lower than 10 C BS EN ISO 3

21、452-6:2008ISO 3452-6:2008(E) iv ISO 2008 All rights reservedIntroduction Temperatures lower than 10 C can affect the properties of penetrant test materials. The use of penetrant materials and the testing of penetrant materials within the temperature range 10 C to 50 C are the subject of EN 571-1 and

22、 ISO 3452-2. This part of ISO 3452 addresses materials and their use at lower temperatures than 10 C. This part of ISO 3452 introduces the concept of process times being linked to working temperatures and accordingly users are recommended to ensure that testing products are correctly associated with

23、 process parameters in written instructions (procedures). Testing products may be specifically developed and qualified for low temperature use but testing products qualified for use at normal temperatures, in some cases, may also be suitable for lower temperature use. BS EN ISO 3452-6:2008INTERNATIO

24、NAL STANDARD ISO 3452-6:2008(E) ISO 2008 All rights reserved 1Non-destructive testing Penetrant testing Part 6: Penetrant testing at temperatures lower than 10 C 1 Scope This part of ISO 3452 specifies the testing requirements particular to applications at low temperatures (lower than + 10 C) as wel

25、l as the method for qualification of suitable testing products. It applies only to materials qualified for the relevant temperature range used in accordance with the manufacturers instructions. 2 Normative references The following referenced documents are indispensable for the application of this do

26、cument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3059, Non-destructive testing Penetrant testing and magnetic particle testing Viewing conditions ISO 3452-1, Non destructive tes

27、ting Penetrant testing Part 1: General principles ISO 3452-2, Non-destructive testing Penetrant testing Part 2:Testing of penetrant materials ISO 3452-3, Non-destructive testing Penetrant testing Part 3: Reference test blocks 3 Low temperature penetrant testing 3.1 General principles The general pri

28、nciples of ISO 3452-1 shall apply unless otherwise stated in this part of ISO 3452 or in the manufacturers instructions. Qualification tests are carried out by the manufacturer and if products are used within the stated range, no further tests are needed on site. 3.2 Technical principles Depending o

29、n the temperature range, some specific problems might be encountered: a) moisture, or even ice, on the test object; b) lower evaporation rate of solvents and of non-aqueous wet developers than at higher temperatures; c) when spray cans are used, pressure and spray quality may be affected; d) some pe

30、netrants may precipitate in such a case tests shall be carried out within the standard temperature range (10 C to 50 C) if the penetrants are to be used in this standard temperature range. BS EN ISO 3452-6:2008ISO 3452-6:2008(E) 2 ISO 2008 All rights reserved3.3 Safety precautions All relevant Europ

31、ean, national and local regulations pertaining to health and safety, environmental requirements etc. shall be observed. Depending on the temperature range, some specific rules shall be enforced: a) when heaters are used (either to warm up the test object, materials or the work environment), precauti

32、ons shall be taken not to have vapours or spray of materials in contact with flames or hot surfaces; b) users shall wear clothes and gloves able to protect them from contact with very low temperature parts. Gloves used shall allow for applying materials without impairing the test; c) in very low tem

33、perature environment, some pieces of equipment (pens, cameras, etc.) may not properly work. Action shall be taken, either to keep them at an acceptable temperature until use (for instance by keeping them under clothing, close to the users body) or by using equipment capable of functioning in such an

34、 environment. 3.4 Reference blocks/test panels Care shall be taken while using reference block/test panels. It could be tempting to put these panels in a freezer, and to take them out when they have reached the targeted temperature for materials testing. Doing so places cold parts in contact with a

35、warmer atmosphere, causing moisture to condense on these parts and the temperature to rise very quickly. Therefore, tests shall be carried out in “real conditions”: parts, users and testing materials are either outside or in a “climatic room” in which the temperature and humidity is capable of dupli

36、cating real conditions. 3.5 Viscosity and penetrant testing If it is the case that the lower the temperature, the higher the liquid or gas viscosity, then note that higher viscosity is not a drawback to penetrant testing. Capillary effect is far more powerful than the effect of the viscosity very vi

37、scous, even jellified penetrants, can lead to very good crack detection. 3.6 Personnel qualification Personnel carrying out testing in accordance with this part of ISO 3452 shall be suitably certified (see e.g. ISO 9712, EN 473). They shall also be knowledgeable of the special considerations for tes

38、ting at lower temperatures (e.g. time limitations for inspection, special considerations of materials). 4 Low temperature penetrant testing process 4.1 General rules The following rules apply: a) surface and discontinuities shall be free of any contaminant, even those stemming from the surface prepa

39、ration; b) penetrant is applied on the part as per the most convenient means; c) when dwell time has elapsed, excess of penetrant will be wiped from the surface with clean, lint-free rags or cloths and a penetrant remover according to the manufacturers recommendation (water should be avoided due to

40、low temperatures); BS EN ISO 3452-6:2008ISO 3452-6:2008(E) ISO 2008 All rights reserved 3d) low temperature penetrant testing generally is not carried out in installations. A non-aqueous wet (solvent-based) developer will then be sprayed on the test object. In low temperature conditions, solvents ev

41、aporate far slower than usual. Therefore, care shall be taken that the solvent evaporation time be short enough so as to get accurate indications; e) viewing conditions shall comply with the requirements of ISO 3059. 4.2 Special requirements 4.2.1 Surface preparation Within the +10 C to 5 C range, t

42、he main trouble comes from water, either as liquid (moisture), frost or even ice. Water is detrimental to the process. To get rid of it: a) gently warm the surface for several minutes to make water evaporate from discontinuities; and/or b) use a volatile, water soluble solvent, such as acetone or is

43、opropyl alcohol (generally degreasers used before penetrant applications are hydrocarbon-based and do not in any way remove water); c) allow some minutes for evaporation, ensuring evaporation does not cool down the surface of the part enough to have water condensing on it again. When the temperature

44、 is lower than 5 C, check that there is no frost or ice. Any frost or ice shall be removed. 4.2.2 Penetrant application/dwell time Penetrant may be sprayed from a spray can, provided pressure is sufficient. Any other convenient means of application may be used. It is recommended to let the penetrant

45、 act twice as long as for 10 C to 50 C range, as water is generally not completely removed from the discontinuities and can make it more difficult for the penetrant to enter. 4.2.3 Excess penetrant removal Even if a water washable penetrant has been applied, the use of lint free cloth or wipes and a

46、 volatile penetrant remover according to the manufacturers recommendation is a better choice than water. First wipe as much penetrant as possible with clean lint free cloth or wipes. Then use lint free cloth or wipes lightly moistened with the solvent to remove the remaining penetrant. As a final st

47、ep, use dry lint free cloth or wipes to take out the traces of penetrant/solvent. Allow some minutes for solvent evaporation. 4.2.4 Developer application Non-aqueous wet (solvent-based) developer is most suitable. As it shall be sprayed, the most convenient means is a spray can. The spray can shall

48、be kept at 10 C minimum to ensure an effective spray giving a thin, even layer. The solvent shall evaporate within maximum 3 min. Otherwise, indications could become dim, leading to difficulty in interpretation. BS EN ISO 3452-6:2008ISO 3452-6:2008(E) 4 ISO 2008 All rights reservedSolvent evaporatio

49、n may be sped up by a gentle flow of warm air (not by an infrared heater) to meet this requirement. Developing time should be increased by a factor of two, depending on previous tests. 4.2.5 Viewing The viewing conditions shall comply with the requirements of ISO 3059. 5 Testing of low temperature penetrant testing materials 5.1 Preliminary notice Many penetrants and developers used at 10C to 50C temperature range may be used at low temperatures. Degreasers/removers shall be specified