1、June 2007DEUTSCHE NORM English price group 9No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 25.220.20!,x|0“9858913www.
2、din.deDDIN EN 15339-2Thermal spraying Safety requirements for thermal spraying equipment Part 2: Gas control unitsEnglish version of DIN EN 15339-2:2007-06Thermisches Spritzen Sicherheitsanforderungen fr Einrichtungen fr das thermische Spritzen Teil 2: GaskontrolleinheitenEnglische Fassung DIN EN 15
3、339-2:2007-06www.beuth.deDocument comprises 14 pages 09.07DIN EN 15339-2:2007-06 2 National foreword This standard has been prepared by CEN/TC 240 “Thermal spraying and thermally sprayed coatings” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenauss
4、chuss Schweitechnik (Welding Standards Committee), Joint Committee NA 092-00-14 AA Thermisches Spritzen und thermisch gespritzte Schichten (DVS AG V 7). The European and International Standards referred to in clause 2 and in the bibliography have been published as the corresponding DIN EN or DIN ISO
5、 Standards (except for ISO 2928 and ISO 7000). EUROPEAN STANDARDNORME 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
6、 de projection thermique - Partie 2: Units dergulation de lalimentation 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
7、 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 on application to the CEN Management Centre or
8、 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 Centre has the same status as theofficial versio
9、ns.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, Portugal,Romania, Slovakia, Slovenia, Spain,
10、 Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR 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
11、.Ref. No. EN 15339-2:2007: EEN 15339-2:2007 (E) 2 Contents Page 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.
12、4 Leak test .7 6 Safety standards7 7 National rules .8 Annex 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.
13、4.1 General11 A.4.2 Pressure control 11 A.4.3 Ventilation.12 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
14、given the status of a national standard, either by publication 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
15、consists of the following parts: Part 2: Gas control units According 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,
16、France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, 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 ma
17、chines and equipment for thermal spraying, in this case of gas 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-Dire
18、ctive 94/9/EC are valid for the use of this European Standard. 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
19、 (including any amendments) applies. EN 559, Gas welding equipment 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 fo
20、r welding, cutting and allied processes EN 657, Thermal spraying 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,
21、 Safety of machinery Safety requirements for fluid power systems 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
22、 appliances using gaseous fuel EN 60079-0, Electrical apparatus 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 fo
23、r explosive gas atmospheres Part 2: Pressurized enclosures “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 requireme
24、nts (IEC 60204-1:2005, modified) EN 60529, Degrees of protection 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, Safe
25、ty of machinery Indication, marking and actuation Part 2: Requirements 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 meas
26、urement of flammable gases Part 1: General requirements and 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
27、components Graphic symbols and circuit diagrams Part 2: Circuit 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 synopsi
28、s IEC 60417-DB1), Graphical symbols for use on equipment 3 Gas 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 prov
29、ide further functions such as controlling and/or closed loop 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 sprayin
30、g process. 3.2 Design Concerning the art of design and scope 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
31、 will be updated permanently. Access to the database is on a 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
32、/or conveying and/or monitoring of cooling media. In any gas 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 compone
33、nts typically perform the following functions: a) gas measuring 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 ap
34、propriate guard class (IP); e) gas safety; sensor with control 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
35、gas control units. 5 Requirements 5.1 General Thermal spraying 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
36、of a defined concentration of oxygen. 5.2 Local separation of 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
37、where ever possible. 5.4 Leak test In any case a leak test shall 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
38、for thermal spraying. a) Area: gas control unit general EN 60079-0; 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
39、: safety devices EN 730-1; EN 730-2; EN 13611; EN 61779-1. f) 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, regulat
40、ions and standards for the use of this European Standard should 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 ga
41、s fitting Figure A.1 Simple gas control unit EN 15339-2:2007 (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 printe
42、r 7 gas fitting 4 monitor 8 liquid fuel fitting Figure A.2 Gas 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
43、unit such as PLC, switches, relays and so on are mounted into 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
44、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.3 Gas control-closed loop control with separate HMI A.4 Pressurized enclosures A.4
45、.1 General Gas control units may be equipped with compressed 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
46、A.4 shows a schematic set-up of a safe gas control unit for 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 pres
47、sure is too low dangerous flash backs can be generated during 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
48、increases out of tolerance range. EN 15339-2:2007 (E) 12 A mass 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 th
49、is case inside the flashback arrestor (3) as well as safety 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 devi
