1、BRITISH STANDARD BS ENISO 14918:1998 Thermal spraying Approval testing of thermal sprayers The European Standard EN ISO 14918:1998 has the status of a British Standard ICS 25.220.20BSENISO14918:1998 This British Standard, having been prepared under the directionof the Sector Committeefor Materials a
2、ndChemicals, was publishedunder the authorityofthe Standards Committee and comes intoeffecton 15 November1998 BSI05-1999 ISBN 0 580 30443 4 National foreword This British Standard is the English language version of EN ISO14918:1998. It is identical with ISO14918:1998. The UK participation in its pre
3、paration was entrusted to Technical Committee STI/40, Thermally sprayed inorganic finishes, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK
4、 interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally inclu
5、de an annex which lists normative references to international publications with their corresponding European publications. The BritishStandards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “
6、International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance wi
7、th a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN ISO title page, pages2 to20 and a back cover. This standard has been updated (see copyright date) and may have had ame
8、ndments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSENISO14918:1998 BSI 05-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN ISO14918 5ii blankEUROPEAN STANDARD NORME
9、EUROPENNE EUROPISCHE NORM EN ISO14918 October1998 ICS 25.220.20 Descriptors: Thermal spraying, qualification, personnel, generalities, certification, verification, tests, acceptability, designation English version Thermal spraying Approval testing of thermal sprayers (ISO14918:1998) Projection therm
10、ique Qualification des agents en projection thermique (ISO14918:1998) Thermisches Spritzen Prfung von thermischen Spritzern (ISO14918:1998) This European Standard was approved by CEN on2 August1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditi
11、ons 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 Central Secretariat or to any CEN member. This European Standard exists in three of
12、ficial 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria
13、, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Sec
14、retariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No.EN ISO14918:1998 EENISO14918:1998 BSI 05-1999 2 Foreword The text of EN ISO14918:1998 has been prepared by Technical Committee CEN/TC240
15、 “Thermal spraying and thermally sprayed, coatings”, the secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC107 “Metallic and other inorganic coatings”. This European Standard shall be given the status of a national standard, either by publication of an identical te
16、xt or by endorsement, at the latest by April1999, and conflicting national standards shall be withdrawn at the latest by April1999. For relationship with EU Directive(s), seeinformative Annex ZA, which is an integral part of this standard. According to the CEN/CENELEC Internal Regulations, the natio
17、nal standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and theUnitedKingdom. Conte
18、nts Page Foreword 2 Introduction 5 1 Scope 5 2 Normative references 5 3 Definitions 5 3.1 Thermal sprayer 5 3.2 Examiner or examining body 6 3.3 Specific acceptance criteria 6 3.4 Test piece 6 3.5 Test specimen 6 3.6 Test 6 4 Essential requirements for approval testing 6 4.1 General 6 4.2 Equipment
19、operation 6 4.3 Masking procedure 6 4.4 Surface preparation 6 4.5 Environmental conditions 6 4.6 Application equipment 6 5 Range of approval 6 5.1 General 6 5.2 Thermal spraying processes 6 5.3 Qualification scope 7 5.4 Supervision 7 5.5 Shapes and dimensions of test pieces 7 5.6 Test methods 7 5.7
20、Acceptance requirements for test pieces 7 5.8 Spray materials for tests 7 6 Examination and testing 7 6.1 Job knowledge test 7 6.2 Practical test 7 7 Re-tests 8 7.1 General 8 7.2 Additional tests 8 8 Period of validity 8 8.1 Initial approval 8 8.2 Prolongation 8 8.3 Requirements 8 8.4 Scheduling 8 8
21、.5 Thermal sprayers with an expired or cancelled qualification status 8 9 Certification 8 9.1 Final approval 8 9.2 Records 8ENISO14918:1998 BSI 05-1999 3 Page 10 Designation 8 Annex A (normative) Job knowledge 9 Annex B (normative) Specific acceptance criteria 10 Annex C (informative) Thermal Spraye
22、r Approval Test Certificate 19 Annex ZA (normative) Normative referencestointernational publications withtheirrelevant European publications 20 Figure B.1 Test piece for flame or arcsprayingofAl/Zn and their alloys 15 Figure B.2 Test piece for flame or arc spraying of metals and alloys 17 Figure B.3
23、 Test piece for flame spraying of self-fluxing alloys 17 Figure B.4 Test piece for plasma spraying metals and alloys 18 Figure B.5 Test piece for plasma sprayingofceramics, plasma spraying ofmetalbased carbides/carbides, HVOF-spraying ofmetals and alloys or HVOF-spraying of metal based carbides 18 T
24、able 1 Terms of thermal spraying 64 blankENISO14918:1998 BSI 05-1999 5 Introduction This standard covers the principles of the approval testing of sprayer performance for thermal spraying. The quality of work involved in thermal spraying depends on the skill and job knowledge of the thermal sprayer.
25、 The ability of the thermal sprayer to follow verbal and written instructions and testing of his skill are therefore important factors in ensuring the quality of the thermally sprayed product. This standard is intended to provide the basis for the mutual recognition by examining bodies for approval
26、relating to thermal sprayers competence in the various fields of application. Tests shall be carried out in accordance with this standard unless more severe tests are specified by the relevant application standards when these shall be applied. The thermal sprayers skill and job knowledge continue to
27、 be approved only if the thermal sprayer is working with reasonable continuity on thermal spraying work within the extent of approval. All new approvals are to be in accordance with this standard from the date of this issue. 1 Scope This standard gives procedural instructions for approval testing of
28、 thermal sprayers. It defines essential requirements, ranges of approval, test conditions, acceptance requirements and certification for approval testing of thermal spray performance. During the approval test the thermal sprayer shall be required to show adequate practical experience and job knowled
29、ge of thermal spraying processes, materials and safety requirements for which he is to be approved; information on these aspects is given in Annex A. This standard shall be used when the thermal sprayers approval is required by the standard, the purchaser, by inspection authorities or by other organ
30、isations. The thermal spraying processes referred to in this standard include those spraying processes which are designated as manual or mechanized. Due to the variety and specialisation of automatic systems for thermal spraying where the thermal sprayer has no direct influence on the spraying proce
31、ss, this standard is not applicable in those circumstances. The certificate of approval testing is issued under the sole responsibility of the examiner or test body. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These no
32、rmative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated re
33、ferences the latest edition of the publication referred to applies. EN582, Testing of thermally sprayed coatings Determination of adhesive tensile strength. EN657, Thermal spraying Terminology, classification. EN1274, Powders for thermal spraying Composition Technical supply conditions. EN1395, Acce
34、ptance inspection of thermal spraying equipment. EN22063, Metallic and other inorganic coatings Thermal spraying Zinc, aluminium and their alloys. ISO6507-1, Metallic materials Hardness test Vickers test Part1: HV5 to HV100. ISO6508, Metallic materials Hardness tests Rockwell test (scales A B C D E
35、F G H K). ISO8501-1, Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness Part1:Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings. 3 Definitions For
36、the purpose of this standard the definitions in EN657 and the following apply. 3.1 thermal sprayer a person who performs thermal spraying with a manual or mechanized system 3.1.1 manual thermal spraying where the spraying gun or torch is manipulated by hand 3.1.2 mechanized thermal spraying where so
37、me aspects of the process are mechanized, with the gun/torch not manipulated by handENISO14918:1998 6 BSI 05-1999 Table 1 Terms of thermal spraying 3.1.3 automatic thermal spraying all operations typical of the spraying process are fully mechanized including all handling, e.g.workpiece loading and u
38、nloading, and are integrated in a programmed system The terms of manual, mechanized and automatic thermal spraying are summarized in Table 1 3.2 examiner or examining body a person or organisation who verifies compliance with the application standard 3.3 specific acceptance criteria a document provi
39、ding in detail the criteria by which a thermal sprayer can be tested to be approved for a particular spraying technique or application area 3.4 test piece in the sense of this standard, the thermal spray workpiece used for the approval test 3.5 test specimen in the sense of this standard, a portion
40、cut from the test piece in order to perform a specified analytical test 3.6 test in the sense of this standard, a series of operations which will include the making of a thermally sprayed test piece and subsequent non-destructive and/or destructive testing and reporting of results 4 Essential requir
41、ements for approval testing 4.1 General The criteria specified in this clause shall be examined in order to identify the ability of the thermal sprayer in these areas. The thermal sprayers approval test shall be carried out on test pieces and is independent of the type of construction. For all therm
42、al spraying processes and operations there exists basic job knowledge and specific knowledge related to the process, on which the thermal sprayer shall be tested, seeAnnex A. 4.2 Equipment operation The thermal sprayer shall be tested to determine his knowledge of the equipment. Further details seeA
43、.4.3. 4.3 Masking procedure The thermal sprayer shall be tested to determine his knowledge of proper masking procedures for both surface preparation and spraying. 4.4 Surface preparation The thermal sprayer shall approve the surface of the thermal spray test piece which are used for qualification. H
44、e should also maintain a properly prepared surface during the qualification testing. 4.5 Environmental conditions The thermal sprayer shall approve the environmental conditions such as temperature, humidity, dew point, as being suitable for spraying the test pieces. 4.6 Application equipment Test re
45、sults, gained from test pieces sprayed with actual production equipment, or equipment similar to it in the view of the certifying examining body and representative of said equipments quality, shall be utilised for thermal sprayer qualification. 5 Range of approval 5.1 General Thermal sprayers shall
46、be qualified for thermal spraying to a specific coating process and method of application. The qualification shall only be valid for that specific coating process and method of application. The thermal spraying processes and methods of application covered by this standard are identified in5.2. 5.2 T
47、hermal spraying processes 5.2.1 Grouping of thermal spraying processes This standard covers the following thermal spraying processes according to EN657: flame spraying; arc spraying; term gun movement workpiece movement workpiece loading/unloading manual manual manual/mechanized manual/mechanized me
48、chanized mechanized mechanized manual automatic mechanized mechanized mechanizedENISO14918:1998 BSI 05-1999 7 plasma spraying; high velocity flame spraying; powder spraying; wire spraying/rods/cords. 5.2.2 Application method manual mechanized 5.2.3 Materials The materials given in Annex B are the sp
49、ecific materials to be used in the approval test. The following materials are given only for information to show which material is appropriate for each process. Appropriate materials for various processes: Flame spraying: powder, wire or rods:/Arc spraying: Metals and alloys (for engineering purposes) Zinc and aluminium and their alloys (forcorrosion protection) Flame spraying: powder, wire or rods: Self-fluxing alloys Plasma spraying Metals and alloys Ceramics Metal base
