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BS EN 571-1:1997
BS EN Non-d BS EN Non-des DIN EN non General principles The European Standard E I 97 has the status of a l British Standard Ein Dt ae Text af? GeneraL principies, published by the European Committee. EN was produced as a result of internationai discussion in which the UK took an active part. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN titie page, pages 2 to 10, an inside back cover and a back cover.
General principles Essais non destructifk – Examen par ressuage Partie 1: Up-to-date lists and bibliographical references concerning such nationai standards dni be obtained on application to the Central Secretariat or to any CEN member. This European Standard shall be given the status of a national standard, either by pubiidon of an identical text or by endorsement, at the latest by Julyand conflicting nationai standards shall be withdrawn at the latest by July Genemlprincipies Non-destructive testing -Penetrant testing Part 2 Testing o penetrant matemads: Austria, Belgium, Denmark, F?
Prolonged or repeated contact of these materiais with This standard is not intended to be diin for acceptance criteria and gives no information relating to the skin or any mucous membrane should be avoided. The term ‘discontinuity’ is used here in the sense that dln evaluation concerning acceptability or The penetrant testing products and equipment shall be non-acceptability is included.
Methods for determjning and monitoring the essentiai properties of penetrant testing products to be used are When using UV-A sources, care shall be taken to specified in EN and EN Whether it fonns an integral part of the lamp or is a 2 Normative references separate component, the UV-A? There is legislation and reguiations regarding health, These nonnative references are cited a the t safe ,pollution and storage,etc.
For dated references, subsequent amendments to or revisions of any of these 5 General principles hs publications apply to t i European Standard only when incorporated in it by amendment or revision.
Part 2 TRsting of penetrant mai! After the testing appropriate penetsation time has een the excess Part 3: This absorbs the penetrant that has Nmdestructive testing -Penetmnt prEN entered and remains in the discontinuities and may testing – Equipment give dn clearly visible enhanced indication of the prEN NmdestmtiVe testing discontinui. TfmnirwbgyShould complementary nondestructive testing be Pari 6: Terms used in penetrant required, the penetrant inspection shall be performed s y s m 1 first unless agreed upon between the contracting NomiesmuCtive testing – PeneEmnt prEN parties so as not to introduce contaminants into open testing and magnetic pariicie testing 57-11 discontinuities.
If rn inspection is used xin cond.
For specific cases, it is necessary to use penetrant testing products complying with particu r requirements with regards to flamrnabilitv. A product family is understood as a combhation of the a preparation and precleaning see 8. For the requirements of equipment, see EN rin When tested in accordance with prEN the penetrant and excess penetrant remover shaU be from one manufacturer.
EN Non-destructive testing penetrant testing_图文_百度文库
Only approved product families shall be used. The assessed level always refers to the method used for type testing of the approved product family. Example Designation of an approved product family comprising fluorescent penetrant water as excess penetrant remover A and a dry powder developer aand a system sensitivity of level 2 is the foilowing penetrant testing s s e when using prEN and ytm prEN giving the example: Penetrant materiais from different eh shall not be mixed during the initiai f i h g of the faciliw.
These methods remove contaminants from the surface and generally are incapable of removing contaminants from within surface discontinuities.
Residues from chemical precleaning processes can 7. Acids and chromates in particular 5711- greatly reduce detailed in prEN don For temperatures below 10 “C or above 60 “C oniy penetrant product families and procedures approved in hs accordance with prEN for ti purpose shall be used NOTE. Especially i the low temperature range there is a danger n of water condensing in the discontinuities and on the surfaces, hs and ti water will prevent the penetrant from entering the discontinuities.
The penetration time can vary from 5 min to 60 min. The penetration time should be a least as long as 571- t time used for the dete-on of sensitivity see 6. If not, the actuai penetration time shall be recorded in the written test procedure.
In no case shall 5711- penetrant be allowed to dry during the penetration time. Care shall be taken to minimize the effect of mechanical action caused by the rinsii method. The temperature of the water shall not exceed 50 “C.
Any other removal technique shall be approved by the contracting parties, particularly when solvent remover is sprayed directly on to the part to be tested 8.
Before the application of the emulsifier, a water wash should be cin in order to remove the bulk of the excess penetrant from the test surface and to facilitate a uniform action of the hydrophilic emulsifier which will be applied subsequently The emulsifier shall be applied by immersion or by foam equipment.
The concentration and the contact time of the emuisiier shall be evaluated by the user through pretests according to the manufacturer’s instructions. The predetermined emulsifier contact time shall not be exceeded. This can oniy be done by immersion. The emulsifier contact time shall be evaluated by the user through pretests according to the manufacturer’s instructions. This time shall be suffcient to 517-1 oniy the excess penetrant to be removed ein the test surface during the subsequent water wash.
The emulsifying time shall not be exceeded Immediately after emulsification, a water wash shall be carried out as described in 8. Subsequent cleaning with a clean lint-free cloth, lightly moistened with solvent, shall be then carried out.
For fluorescent penetrants, t i shall be carried out under a hs UV-A source. When faced with excessive background on parts after excess penetrant removal has been carried out, the decision on future action shall be taken by a suitably qualified person.
Except when using water-based developer the t s et surface shall be dried as quickly as possible after excess penetrant removal, using one of the following methods: If compressed air is used, particular care shall be taken to ensure that it is water- and oil-free and impinging pressure on the surface of the part i kept as low as s possible.
The method of drymg the part to be tested shall be carried out in a way ensuring that the penetrant entrapped in the discontinuities does not dry. The surface temperature shall not exceed 50 “C during drymg uniess otherwise approved. The application of the developer shall be carried out as soon as possible after eh removal of excess penetrant.
The 5771-1 shall be uniformly applied to the ts surface by one of the following techniques: A ti uniform application of the developer shall be hn carried out by immeision in agitated suspension or by spraying with suitable equipment in accordance with the approved procedure. The immersion time shall be as short as possible to ensure optimum results. The development time dln – rin after application when dry developer enn applid, – immediately after drying when wet developer is applied.
This facilitates a better interpretation of indications. The finai inspection shall be carried out when the development time has elapsed Aids for visual examination, such as magmfication instruments or contrast spectacles, can be used NOTE. The vin, width or intensity of the indication provide limited information. The immersion time should be as short as possible to ensure an optimum result.
Djn part shall be dried by evaporation andor by the use of a forced air circulation oven. All surfaces which can be viewed by the operatois shall not fluoresce. No paper or cloth which fluoresces under UV light shali be in sight of the operator.
The -Wipe off developer with a clean, lint-free cloth. UV-A irradiance a the surface inspected shall not be t less than 10 whz i??? The test surface shall be inspected under daylight or – When the recommended development time has under artjficial whik light with an illuminance of not elapsed, carefully peel off the developer coating.
The layout of a form that can be used for the test dln is given in annex B. It shall include all the details relating to the method which are important for the evaluation of the test results, and additional information relating to the parts to be tested,although t i data should be modified, as appropriate, hs depending on the type of part. If another form is used it shall contain all the information detailed in items a to h.
The test report may be omitted if a test procedure fulfilling the requirements of 8. The use of a different type of penetrant or a penetrant of the same type from a dif? Penetrant Testing Test report no.: Part to be tested Dimensions: Test follow-up plan no.: Product designation Penetrant Excess penetrant remover: Deviations from the test instructions: Deviations from EN Excess penetrant removal further details, e.
Test results Test location: Evaluation ih in accordance w t test instnictions: It is t ncorporated by Royal Charter. Contract requirements 4 British Standard does not purport to include all the necessary provisions of a sontract. Users of British Standards are responsible for their correct application.
Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure ta they possess the latest amendments or editions. W e would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the responsible 57-11 committee, the identity of which can be found on djn inside fi-ont cover.
Tel 9ooo; Fax: BSI a s holds the copyright, in the UK, of lo the publications of the international standardhalion bodies. Except as di under the Copyright, Designs and Patents Act no extract may be reproduced, stored in a retrieval system or transmitted in any form or 571-11 any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI.
This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations.