1、BSI Standards Publication PD CEN/TR 15339-5:2014 Thermal spraying Safety requirements for thermal spraying equipment Part 5: Powder and wire feed unitsPD CEN/TR 15339-5:2014 PUBLISHED DOCUMENT National foreword This Published Document is the UK implementation of CEN/TR 15339-5:2014. The UK participa
2、tion in its preparation was entrusted to Technical Committee STI/40, Thermal spraying and thermally sprayed coatings. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a cont
3、ract. Users are responsible for its correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014 ISBN 978 0 580 78895 6 ICS 25.220.20 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under
4、the authority of the Standards Policy and Strategy Committee on 31 December 2014. Amendments issued since publication Date Text affectedPD CEN/TR 15339-5:2014TECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CEN/TR 15339-5 December 2014 ICS 25.220.20 English Version Thermal spraying - Safety re
5、quirements for thermal spraying equipment - Part 5: Powder and wire feed units Projection thermique - Exigences de scurit relatives au matriel de projection thermique - Partie 5: Dispositifs dalimentation en poudre et en fil Thermisches Spritzen - Sicherheitsanforderungen fr Einrichtungen fr das the
6、rmische Spritzen - Teil 5: Pulver- und Drahtfrdereinheiten This Technical Report was approved by CEN on 16 September 2014. It has been drawn up by the Technical Committee CEN/TC 240. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark
7、, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FO
8、R STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TR 15339-5:2014 EPD CEN/TR 15339
9、-5:2014 CEN/TR 15339-5:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Function of the powder and wire feed units .4 3.1 General 4 3.2 Features of the powder feed unit .4 3.3 Features of the wire feed unit .5 3.3.1 Flame spraying .5 3.3.2 Arc spraying .5 4 Potential hazards
10、.5 4.1 General 5 4.2 Powder feed units 5 4.3 Wire feed units .5 5 Safety requirements Protection measures .6 5.1 General 6 5.2 Safety requirements and protection measures for powder feed units in the case of flame, HVOF, and plasma spraying .6 5.3 Safety requirements for wire feed units and protecti
11、on measures in the case of arc spraying 6 6 Requirements for manufacture, supply, service and maintenance6 6.1 Requirements of the manufacturer 6 6.2 Requirements of the integrator 7 6.3 Requirements of the user .7 7 National rules .7 Bibliography 8 PD CEN/TR 15339-5:2014 CEN/TR 15339-5:2014 (E) 3 F
12、oreword This document (CEN/TR 15339-5:2014) has been prepared by Technical Committee CEN/TC 240 “Thermal spraying and thermally sprayed coatings”, the secretariat of which is held by DIN. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent ri
13、ghts. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. CEN/TR 15339, Thermal spraying - Safety requirements for thermal spraying equipment is composed of the following parts: Part 1: General requirements Part 2: Gas control units (published as a Europea
14、n Standard) Part 3: Torches for thermal spraying and their connection and supply units Part 4: Gas and liquid fuel supply Part 5: Powder and wire feed units Part 6: Spray booth, Handling system, Dust collection, Exhaust system, Filter PD CEN/TR 15339-5:2014 CEN/TR 15339-5:2014 (E) 4 1 Scope This Tec
15、hnical Report specifies safety requirements of equipment for thermal spraying, in this case of powder and wire feed units. This part of CEN/TR 15339 should be used in conjunction with CEN/TR 15339-1, which deals with general aspects of designing, manufacturing, and/or putting in service of machines
16、or equipment and with the responsibility for issuing the CE Conformity Declaration. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For un
17、dated references, the latest edition of the referenced document (including any amendments) applies. CEN/TR 15339-1, Thermal spraying Safety requirements for thermal spraying equipment Part 1: General requirements EN 657, Thermal spraying Terminology, classification EN 1395-7, Thermal spraying Accept
18、ance inspection of thermal spraying equipment Part 7: Powder feed systems 3 Function of the powder and wire feed units 3.1 General Thermal spray processes are described and schematically represented in EN 657. The feed unit shall enable a uniform processing of the spraying material and shall be suit
19、able for operation with the spraying equipment to be intended for spray application. 3.2 Features of the powder feed unit The powder feed unit can be of type: stand-alone; or integrated in the torch system; and its operation mode can be: independent; or in automatic/remote mode controlled by the spr
20、ay control system. The powder feed rate shall be adjustable. The actual values shall be constant and reproducible in relation to the set values; this requires an adequate flow rate and a constant pressure of the carrier gas. The powder feed unit shall be able to operate inside or outside of a spray
21、booth, subject to practical limits on the length of powder feed hose from the feeder to the torch. The acceptance inspection of the powder feed unit is specified in EN 1395-7. PD CEN/TR 15339-5:2014 CEN/TR 15339-5:2014 (E) 5 3.3 Features of the wire feed unit 3.3.1 Flame spraying Usually the wire fe
22、ed rate for flame spraying is set by the speed regulation of an air turbine or air motor. It may also be set by adjustment of an electric motor manually or through a more sophisticated control. 3.3.2 Arc spraying The wire feed rate for arc spraying is set by the adjustment of an electric motor or an
23、 air motor and the push and/or pull drives connected with that. There is an almost linear relationship between wire feed rate and current so it is common to express the feed rate in amperes. In some systems, the current itself is set and the wire feed rate automatically adjusted to give the set curr
24、ent. A uniform, controllable, and reproducible wire feed rate shall be provided by the regulated motor. An adequate and constant air pressure and flow rate or electrical power supply shall also be provided. 4 Potential hazards 4.1 General For a safe operation of the powder or wire feed unit, the fol
25、lowing hazards shall be considered for normal operation or abnormal foreseeable circumstances. 4.2 Powder feed units The following hazards shall be considered: gas leakage from the powder feed unit and/or the hoses; gas escape under high pressure; static charging in powder supply hoses with risk of
26、sparks and shocks; back flow of hot or flammable gases in the case of excessive pressure in the combustion chamber for HVOF spraying; exposure of the operating personnel to harmful dust when filling, emptying, or cleaning the powder feed unit. An adequate pressure release shall be ensured before ope
27、ning; risk of explosion due to powder distributed outside the powder feeder during filling, emptying or cleaning. 4.3 Wire feed units The operator can be injured by electric shock if live parts such as the wire reel and the wire itself can be touched. Whilst the voltage is typically less than 50 V,
28、occasionally higher transient voltages can be generated by the inductance in the system. PD CEN/TR 15339-5:2014 CEN/TR 15339-5:2014 (E) 6 5 Safety requirements Protection measures 5.1 General According to the type of the feed unit and also whether the spraying process is manually, mechanically or au
29、tomatically operated specific safety requirements are to be considered and protection measures are to be carried out for normal operation or any foreseeable abnormal operation. 5.2 Safety requirements and protection measures for powder feed units in the case of flame, HVOF, and plasma spraying Conce
30、rning the safety requirements of the powder feed unit, the following items shall be considered: the relationship between the pressure in the combustion chamber of the torch and the carrier gas system shall be considered; only inert carrier gases (usually Ar or N 2 ) should be used; to ensure gas tig
31、htness of the powder feed unit and the connection hoses, a leak test shall be carried out prior to use, after installation, commissioning, after re-assembly or repair work; to provide a simple and safe method to fill and empty the powder feeder. When cleaning, filling or emptying the powder feed uni
32、t exposure of the operator to dust shall be considered. If applicable, personal protective equipment shall be used; powder spilled around the powder feeder should be extracted or cleaned up, using appropriate tools and methods before starting operation. 5.3 Safety requirements for wire feed units an
33、d protection measures in the case of arc spraying Concerning the safety requirements of the wire feed unit, the following items shall be considered: protection against contact with electrically live parts like the wire reel and the spraying wire itself; avoidance of inadmissible high voltage at the
34、feeder, which may impair the operator; protection against mechanical hazards such as finger trapping, etc. 6 Requirements for manufacture, supply, service and maintenance 6.1 Requirements of the manufacturer The following items shall be considered: designing and manufacturing of the equipment accord
35、ing to the relevant Directives of the European Union and the technical instructions of CEN/TR 15339-1 and of this Technical Report; presentation of an operation manual of the equipment; service plan providing instructions for measures and testing respectively replacement of worn parts at intervals;
36、plan for training the operators. PD CEN/TR 15339-5:2014 CEN/TR 15339-5:2014 (E) 7 6.2 Requirements of the integrator Installation and putting into service meeting the requirements of the Directives of the European Union and the instructions of CEN/TR 15339-1 and of this Technical Report. 6.3 Require
37、ments of the user The following items shall be considered: operating equipment meeting the requirements of the Directives of the European Union and the instructions of CEN/TR 15339-1 and of this Technical Report; preparing the operating personnel; instruction of the operator; execution of the servic
38、e plan. 7 National rules National laws or regulations shall be considered and can be added in the prevailing national foreword of this Technical Report, if applicable. PD CEN/TR 15339-5:2014 CEN/TR 15339-5:2014 (E) 8 Bibliography 1 ATEX 95 Directive: Directive 94/9/EC of the European Parliament and
39、the Council of 23 March 1994 on the approximation of the laws of the Member States concerning equipment and protective systems intended for use in potentially explosive atmospheres, OJ L 100, 19.4.1994, p. 129, available from: http:/eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:1994:100:0001:0
40、029:EN:PDF 2 CEN/TR 15339-3, Thermal spraying Safety requirements for thermal spraying equipment Part 3: Torches for thermal spraying and their connection and supply units 3 EN 60974-5, Arc welding equipment Part 5: Wire feeders (IEC 60974-5) 4 EN 60974-10, Arc welding equipment Part 10: Electromagn
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