1、BRITISH STANDARDBS EN 15339-2:2007Thermal spraying Safety requirements for thermal spraying equipment Part 2: Gas control unitsThe European Standard EN 15339-2:2007 has the status of a British StandardICS 25.220.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54
2、g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 15339-2:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 June 2007 BSI 2007ISBN 978 0 580 50886 8National forewordTh
3、is British Standard was published by BSI. It is the UK implementation of EN 15339-2:2007. The UK participation in its preparation was entrusted to Technical Committee STI/40, Thermally sprayed inorganic finishes.A list of organizations represented on this committee can be obtained on request to its
4、secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STAN
5、DARDNORME EUROPENNEEUROPISCHE NORMEN 15339-2March 2007ICS 25.220.20English VersionThermal spraying - Safety requirements for thermal sprayingequipment - Part 2: Gas control unitsProjection thermique - Exigences de scurit relatives aumatriel de projection thermique - Partie 2: Units dergulation de la
6、limentation en gazThermisches Spritzen - Sicherheitsanforderungen frEinrichtungen fr das thermische Spritzen - Teil 2:GaskontrolleinheitenThis European Standard was approved by CEN on 3 February 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condit
7、ions 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 on application to the CEN Management Centre or to any CEN member.This European Standard exists in three of
8、ficial 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 Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria,
9、 Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE F
10、OR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15339-2:2007: EEN 15339-2:2007 (E) 2 Contents P
11、age Foreword3 1 Scope 4 2 Normative references 4 3 Gas control units .5 3.1 Function5 3.2 Design .5 4 Components within a gas control unit 6 5 Requirements.7 5.1 General7 5.2 Local separation of gas and electric power7 5.3 Solid piping 7 5.4 Leak test .7 6 Safety standards7 7 National rules .8 Annex
12、 A (informative) Examples for design of gas control units 9 A.1 Simple gas control unit .9 A.2 Gas control-/closed loop control with integrated HMI.10 A.3 Gas control-/closed loop control with separate HMI10 A.4 Pressurized enclosures 11 A.4.1 General11 A.4.2 Pressure control 11 A.4.3 Ventilation.12
13、 EN 15339-2:2007 (E) 3 Foreword This document (EN 15339-2:2007) has been prepared by Technical Committee CEN/TC 240 “Thermal spraying and thermally sprayed coatings”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publicati
14、on of an identical text or by endorsement, at the latest by September 2007, and conflicting national standards shall be withdrawn at the latest by September 2007. EN 15339 Thermal spraying Safety requirements for thermal spraying equipment consists of the following parts: Part 2: Gas control units A
15、ccording to the CEN/CENELEC Internal Regulations, the national standards 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, L
16、atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 15339-2:2007 (E) 4 1 Scope This European Standard specifies safety requirements of machines and equipment for thermal spraying, in this case of g
17、as control units. This European Standard should be used in conjunction with the Part 1 which deals with general aspects when designing, manufacturing, and/or putting in service of machines or equipment. Generally the requirements of EU-Directive 94/9/EC are valid for the use of this European Standar
18、d. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 559, Gas welding equ
19、ipment Rubber hoses for welding, cutting and allied processes EN 560, Gas welding equipment Hose connections for equipment for welding, cutting and allied processes EN 561, Gas welding equipment Quick-action coupling with shut-off valves for welding, cutting and allied processes EN 657, Thermal spra
20、ying Terminology, classification EN 730-1, Gas welding equipment Safety devices Part 1: Incorporating a flame (flashback) arrestor EN 730-2, Gas welding equipment Safety devices Part 2: Not incorporating a flame (flashback) arrestor EN 982, Safety of machinery Safety requirements for fluid power sys
21、tems and their components Hydraulics EN 13611, Safety and control devices for gas burners and gas-burning appliances General requirements prEN 15069, Safety gas connection valves for metal hose assemblies used for the connection of domestic appliances using gaseous fuel EN 60079-0, Electrical appara
22、tus for explosive gas atmospheres Part 0: General requirements (IEC 60079-0:2004) EN 60079-1, Electrical apparatus for potentially explosive atmospheres Part 1: Flameproof enclosure “d“ (IEC 60079-1:2003) EN 60079-2, Electrical apparatus for explosive gas atmospheres Part 2: Pressurized enclosures “
23、p“ (IEC 60079- 2:2001) EN 60079-10, Electrical apparatus for explosive gas atmospheres Part 10: Classification of hazardous areas (IEC 60079-10:2002) EN 60204-1, Safety of machinery Electrical equipment of machines Part 1: General requirements (IEC 60204-1:2005, modified) EN 60529, Degrees of protec
24、tion provided by enclosures (IP code) (IEC 60529:1989) EN 61310-1, Safety of machinery Indication, marking and actuation Part 1: Requirements for visual, auditory and tactile signals (IEC 61310-1:1995) EN 15339-2:2007 (E) 5 EN 61310-2, Safety of machinery Indication, marking and actuation Part 2: Re
25、quirements for marking (IEC 61310-2:1995) EN 61496-1, Safety of machinery Electro-sensitive protective equipment Part 1: General requirements and tests (IEC 61496-1:2004, modified) EN 61779-1, Electrical apparatus for the detection and measurement of flammable gases Part 1: General requirements and
26、test methods (IEC 61779-1:1998, modified) ISO 1219-1, Fluid power systems and components Graphic symbols and circuit diagrams Part 1: Graphic symbols for conventional use and data-processing applications ISO 1219-2, Fluid power systems and components Graphic symbols and circuit diagrams Part 2: Circ
27、uit diagrams ISO 2928, Rubber hoses and hose assemblies for liquefied petroleum gas (LPG) in the liquid or gaseous phase and natural gas up to 25 bar (2,5 MPa) Specification ISO 7000, Graphical symbols for use on equipment Index and synopsis IEC 60417-DB1), Graphical symbols for use on equipment 3 G
28、as control units 3.1 Function Gas control units are designed in order to control and/or close loop control and/or monitor of gas flows which are applied for thermal spraying processes according to EN 657. Moreover gas control units can provide further functions such as controlling and/or closed loop
29、 controlling and/or monitoring of: current and/or voltage; feeding liquid flow volumes or masses (fuel, cooling water); other cooling media (air, CO2and others); wire feed rate velocities; as well as various control functions of the spraying process. 3.2 Design Concerning the art of design and scope
30、 of control and closed loop control technique the systems can be divided into the following main components: monitoring or operation (e.g. HMI Human Machine Interface); control logic (e.g. PLC unit); gas control unit; 1)Online-Database - It will be updated permanently. Access to the database is on a
31、 subscription basis alternatively for a period of 3, 6, 12, or 24 months. Preview available at http:/domino.iec.ch/IEC60417 EN 15339-2:2007 (E) 6 pump system for liquid fuels applied at high velocity oxygen fuel spraying (HVOF); pumping and/or conveying and/or monitoring of cooling media. In any gas
32、 control unit all of the above mentioned components or only some of them can be integrated in a gas control unit (see examples in Annex A, Figures A.1 to A.3). 4 Components within a gas control unit Within a gas control unit various components typically perform the following functions: a) gas measur
33、ing and gas control; flow meter tube; critical orifice; gas mass flow controller; gas valve; b) gas pressure measuring; pressure transducer; pressure gauge; c) gas conveying; hosing; piping; fitting; d) housing; sheet metal cabinet of an appropriate guard class (IP); e) gas safety; sensor with contr
34、ol unit; shut off valve; flashback arrestor; f) water- and power junction; special fittings with power connectors; g) liquid fuel control; pump; impeller-type flow meter. EN 15339-2:2007 (E) 7 Annex A shows schematic examples for design of gas control units. 5 Requirements 5.1 General Thermal sprayi
35、ng technology also uses flammable gases for flame, plasma or HVOF processes which imply a significant potential of danger. Also pure oxygen shall be considered as a dangerous gas because heavy inflammable material will burn in the presence of a defined concentration of oxygen. 5.2 Local separation o
36、f gas and electric power The local separation of gas and electric power provides an important safety feature and shall be realized. 5.3 Solid piping Solid piping for at least fuel, flammable gas and oxygen conveying gas lines shall be used where ever possible. 5.4 Leak test In any case a leak test s
37、hall be carried out after installation and before starting the coating work. 6 Safety standards The following standards reveal the safety guidelines which shall be adhered to for evaluation as well as for manufacturing of gas control units for thermal spraying. a) Area: gas control unit general EN 6
38、0079-0; EN 60079-10; EN 60204-1. b) Area: housing and cabinets EN 60079-1; EN 60079-2; EN 60529. c) Area: monitoring and operation EN 61310-1; EN 61310-2; EN 61496-1. d) Area: liquid pump, e.g. for fuel EN 15339-2:2007 (E) 8 EN 982. e) Area: safety devices EN 730-1; EN 730-2; EN 13611; EN 61779-1. f
39、) Area: operators manual documentation IEC 60417-DB; ISO 1219-1; ISO 1219-2; ISO 7000. g) Area: piping hosing within gas cabinet prEN 15069; ISO 2928. h) Area: input and output EN 559; EN 560; EN 561. 7 National rules National laws, regulations and standards for the use of this European Standard sho
40、uld be mentioned in the national foreword of this European Standard. EN 15339-2:2007 (E) 9 Annex A (informative) Examples for design of gas control units A.1 Simple gas control unit Key 1 MMI (Media Measurement Interface) 2 gas control 3 gas fitting Figure A.1 Simple gas control unit EN 15339-2:2007
41、 (E) 10 A.2 Gas control-closed loop control with integrated HMI Key 1 separate HMI (Human Machine Interface) 5 gas controller 2 gas control unit (MMI Media Measurement interface) 6 pump for liquid fuel or cooling medium 3 record data printer 7 gas fitting 4 monitor 8 liquid fuel fitting Figure A.2 G
42、as control-closed loop control with integrated HMI A local separation can be achieved by using appropriate sheet metal guards, see Figure A.2. A.3 Gas control-closed loop control with separate HMI While electrical components of the control unit such as PLC, switches, relays and so on are mounted int
43、o the operator cabinet, gas control lines are mounted in a separate gas cabinet, see Figure A.3. This cabinet may be installed at a distance from the operator e.g. on top of the sound protection cabin. EN 15339-2:2007 (E) 11 Key 1 separate HMI (Human Machine Interface) 5 gas controller 2 gas control
44、 unit (MMI Media Measurement interface) 6 pump for liquid fuel or cooling medium 3 record data printer 7 gas fitting 4 monitor 8 liquid fuel fitting Figure A.3 Gas control-closed loop control with separate HMI A.4 Pressurized enclosures A.4.1 General Gas control units may be equipped with compressed
45、 air with safety switches controlling the purging of the cabinet as well as cabinets with interlock switches on doors which shut down the systems when a door is opened. Generally, modern technology offers reliable safety components. Figure A.4 shows a schematic set-up of a safe gas control unit for
46、thermal spraying. A.4.2 Pressure control Figure A.4 shows the schematic set up of a gas control cabinet. After the gas input (8) (here from the top) a pressure sensor (5) is monitoring the input pressure of the gas supply. If the input pressure is too low dangerous flash backs can be generated durin
47、g ignition. If the pressure is too high gas carrying components can be damaged by higher than rated maximum pressure. The input pressure can be monitored and action be taken to stop the supply (e.g. solenoid valve) if the pressure drops or increases out of tolerance range. EN 15339-2:2007 (E) 12 A m
48、ass flow controller (2) controls the exact mass of gas conveyed using an integrated valve. Directly after the output the gas is flowing through a flashback arrestor (3). The complete gas line should be equipped with a non return lock (in this case inside the flashback arrestor (3) as well as safety
49、gas fittings with turn round lock (8). The last ones ensure maximum sealing after mounting due to high precision threads. A.4.3 Ventilation A steady ventilation by air flow (6) monitored by pressure sensor (5) (see Figure A.4) prohibits a flammable gas entry into the electrical cabinet. Furthermore, electrical devices are cooled. On the other hand a slight pressurisation serves a
