1、BRITISH STANDARDBS EN 1395-7:2007Thermal spraying Acceptance inspection of thermal spraying equipment Part 7: Powder feed systemsThe European Standard EN 1395-7:2007 has the status of a British StandardICS 25.220.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g5
2、4g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 1395-7:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2007 BSI 2007ISBN 978 0 580 50275 0National forewo
3、rdThis British Standard was published by BSI. It is the UK implementation of EN 1395-7:2007. This standard together with BS EN 1395-1, BS EN 1395-2, BS EN 1395-3, BS EN 1395-4, BS EN 1395-5 and BS EN 1395-6 supersedes BS EN 1395:1996.The UK participation in its preparation was entrusted to Technical
4、 Committee STI/40, Thermally sprayed inorganic finishes.A list of organizations represented on STI/40 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with
5、 a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1395-7January 2007ICS 25.220.20 Supersedes EN 1395:1996 English VersionThermal spraying - Acceptance inspection of thermal spra
6、yingequipment - Part 7: Powder feed systemsProjection thermique - Contrle dacceptation du matrielde projection thermique - Partie 7: Systmes dalimentationde poudreThermisches Spritzen - Abnahmeprfungen fr Anlagenzum thermischen Spritzen - Teil 7: PulverfrdersystemeThis European Standard was approved
7、 by CEN on 23 December 2006.CEN members are bound to comply with the 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 nationalstan
8、dards may be obtained on application to the CEN Management Centre or 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
9、 the CEN Management Centre has the same status as theofficial versions.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, Nethe
10、rlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, 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
11、any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1395-7:2007: EEN 1395-7:2007 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Conditions of acceptance inspection4 5 Procedure of acceptance inspection.5 6 Designation 5 7 In
12、spection report5 Annex A (informative) Inspection report for a powder feed unit (initial test/retest).6 A.1 Function test 6 A.2 Set value on the spraying equipment when testing the powder feed unit: .6 A.3 Mass flow inspection test .6 A.4 Powder de-mixing test Particle size distribution.7 A.5 Measur
13、ing equipment capability7 Bibliography 8 EN 1395-7:2007 (E) 3 Foreword This document (EN 1395-7:2007) 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
14、national standard, either by publication of an identical text or by endorsement, at the latest by July 2007, and conflicting national standards shall be withdrawn at the latest by July 2007. This document together with EN 1395-1, 1395-2, 1395-3, 1395-4, 1395-5 and 1395-6 supersedes EN 1395:1996. EN
15、1395 consists of the following Parts, under the general title Thermal spraying Acceptance inspection of thermal spraying equipment: Part 1: General requirements; Part 2: Flame spraying including HVOF; Part 3: Arc spraying; Part 4: Plasma spraying; Part 5: Plasma spraying in chambers; Part 6: Manipul
16、ator systems; Part 7: Powder feed systems. 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, France, Germany,
17、 Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 1395-7:2007 (E) 4 1 Scope This European Standard specifies requirements for the acceptance inspection
18、 of thermal spraying equipment in the case of powder feed units used in spray jobs to produce thermally sprayed coatings of reproducible quality. This part should be used in conjunction with EN 1395-1, which includes general requirements and explanations of procedures. This part should be used in ad
19、dition to EN 1395-2 when carrying out acceptance inspection for flame and/or HVOF (high velocity oxygen-fuel) spraying equipment, or EN 1395-4 when carrying out acceptance inspection for plasma spraying equipment. 2 Normative references The following referenced documents are indispensable for the ap
20、plication 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 657:2005, Thermal spraying Terminology, classification EN 1274:2004, Thermal spraying Powders Composition, te
21、chnical supply conditions 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 657:2005 apply. 4 Conditions of acceptance inspection 4.1 General Clause 4 and clause 5 specify state of the art technology in thermal spraying equipment and the minimum require
22、ments concerning stable parameter settings and maintenance according to the classes given in Annex A. 4.2 Powder feed unit 4.2.1 General The powder feed unit shall be suitable for operation with the spraying equipment to be tested. This means the carrier gas pressure and flow shall operate under the
23、 specific condition of the spraying process, e.g. in the low pressure atmosphere in the chamber or against the high pressure in the combustion chamber of the burner. The class of the powder feed unit has to correlate with the class of the spraying equipment itself. The unit shall permit uniform proc
24、essing of the spraying powder for which it is designed. It shall be possible to adjust the powder feed rate. The set values shall be constant and reproducible, a precondition for this being adequate flow and constant carrier gas pressure or actuating air pressure, as appropriate. 4.2.2 Stand-alone p
25、owder feed unit This type of powder feed unit uses a carrier gas. A change in the primary gas flow of the spraying equipment, as indicated on the control panel, shall not affect the carrier gas flow. EN 1395-7:2007 (E) 5 4.2.3 Integrated powder feed unit in flame spraying equipment This type of powd
26、er feed unit uses a part of the main gas stream, e.g. part of oxygen flow inside the burner of the flame spraying equipment for the powder supply. This method of powder supply will mainly be used for manual spraying applications but can also be applied for mechanised ones. 5 Procedure of acceptance
27、inspection 5.1 General A powder feed unit shall be deemed to have been properly supplied for all suitable applications when using a spraying powder according to EN 1274, agreed between contracting parties, if it complies with the requirements in 5.2 to 5.4. 5.2 Testing of function The powder feed un
28、it shall comply with the requirements of its specification and/or with the contract confirmation of the supplier. 5.3 Testing the mass flow In order to determine the mass of powder fed over a given period, the system shall be operated in the “cold run“ mode using the carrier gas flow specified by th
29、e manufacturer of the device, but without the burner or arc operated for at least 1 min. During this process, which is to be repeated twice more, the variation in the mass of powder fed shall not exceed 5 % in Class A or 10 % in Class B. In order to check reproducibility, the same feed rate and devi
30、ation shall be achieved after shut-down of the equipment for at least 3 h and recharge using the same amount of the test powder. 5.4 Testing the de-mixing Testing the de-mixing the powder container shall be filled with approximately 1 000 g of the agreed upon spraying powder. After feeding through a
31、pproximately 900 g with the equipment in the “cold run“ mode, in accordance with the manufacturers operating instructions, the remaining quantity of about 10 % shall be analysed for its particle size distribution (PSD) according to EN 1274:2004, 3.3. The maximum deviation caused by de-mixing the pow
32、der shall be agreed between the contracting parties. 6 Designation Acceptance inspection of the powder feed system shall be designated as follows: Acceptance inspection according to EN 1395-7. 7 Inspection report An example for the inspection report is given in Annex A. EN 1395-7:2007 (E) 6 Annex A
33、(informative) Inspection report for a powder feed unit (initial test/retest) The initial test/retest fulfils the requirements of the acceptance inspection according to EN 1395-7. User:. Manufacturer Year of manufacture: . Type of powder feed unit: Type of spraying equipment: . Class of spraying equi
34、pment: Type of spraying gun, if applicable: . CE-documentation complete: yes / no A.1 Function test The function complies with the specification or contract confirmation, respectively: yes / no A.2 Set value on the spraying equipment when testing the powder feed unit: Carrier gas: pressure bar; flow
35、 Nl/min1)A.3 Mass flow inspection test Spraying powder used for testing: _ Particle size: _ according to EN 1274 Feed time: _ min Limit deviationsin % Evaluation Powder feed unit Set value 1stTest 2ndTest 3rdTest Class A Class BActual deviation in % Passed FailedMass of powder fed in g/min 5 10 1)Re
36、ferred to temperature 0 C and normal pressure (1 013,25 hPa). EN 1395-7:2007 (E) 7 A.4 Powder de-mixing test Particle size distribution Measuring the particle size distribution is carried out by: _ method Particle size range Initial mass Residual mass De-mixing Evaluation m g % g % Limit deviation i
37、n % Actual deviation in % passed failed A.5 Measuring equipment capability Limits of error of measuring instruments: _ % of set value (max. 5 %) Class 2.5 2): yes / no Comments: . The powder feed unit has been accepted as a: Class A equipment: yes / no Class B equipment: yes / no Date: Inspectors si
38、gnature: Date: Customers/ signature: Date: Suppliers signature: 2)Maximum permissible error expressed by percentage of measuring span.EN 1395-7:2007 (E) 8 Bibliography 1 EN 1395-1, Thermal spraying Acceptance inspection of thermal spraying equipment Part 1: General requirements 2 EN 1395-2, Thermal
39、spraying Acceptance inspection of thermal spraying equipment Part 2: Flame spraying including HVOF 3 EN 1395-4, Thermal spraying Acceptance inspection of thermal spraying equipment Part 4: Plasma spraying blankBS EN 1395-7:2007BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI
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