EN 1395-5-2018 Thermal spraying - Acceptance inspection of thermal spraying equipment - Part 5 Plasma spraying in chambers.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Thermal spraying - Acceptance inspection of thermal spraying equipmentPart 5: Plasma spraying in chambersBS EN 13955:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1395-5 August 2018 ICS 25.220.20 Supersedes E

2、N 1395-5:2007English Version Thermal spraying - Acceptance inspection of thermal spraying equipment - Part 5: Plasma spraying in chambersProjection thermique - Contrle dacceptation du matriel de projection thermique - Partie 5 : Projection au plasma en chambre Thermisches Spritzen - Abnahmeprfungen

3、fr Anlagen zum thermischen Spritzen - Teil 5: Plasmaspritzen in Kammern This European Standard was approved by CEN on 9 April 2018. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national stan

4、dard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in a

5、ny other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Rep

6、ublic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

7、 EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1395-5:

8、2018 ENational forewordThis British Standard is the UK implementation of EN 13955:2018. It supersedes BS EN 13955:2007, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/40, Thermal spraying and thermally sprayed coatings.A list of organizations repr

9、esented on this committee 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. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 5

10、80 93789 7ICS 25.220.20Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STA

11、NDARDBS EN 13955:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1395-5 August 2018 ICS 25.220.20 Supersedes EN 1395-5:2007English Version Thermal spraying - Acceptance inspection of thermal spraying equipment - Part 5: Plasma spraying in chambersProjection thermique - Contrle dacceptation

12、du matriel de projection thermique - Partie 5 : Projection au plasma en chambre Thermisches Spritzen - Abnahmeprfungen fr Anlagen zum thermischen Spritzen - Teil 5: Plasmaspritzen in Kammern This European Standard was approved by CEN on 9 April 2018. CEN members are bound to comply with the CEN/CENE

13、LEC Internal Regulations which stipulate the conditions 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 CEN-CENELEC Management Centre o

14、r to any CEN member. This European Standard exists in three official 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 CEN-CENELEC Management Centre has the same status as the off

15、icial versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands

16、 Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN A

17、ll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1395-5:2018 EBS EN 13955:2018EN 1395-5:2018 (E) 2 Contents Page European foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 4 4 Principles of acceptance inspecti

18、on 5 4.1 General . 5 4.2 Typical components 5 5 Procedure for acceptance inspection of vacuum components 5 5.1 General . 5 5.2 Low pressure performance of the pump station 6 5.3 Low pressure performance of the chamber 6 5.3.1 Preparation . 6 5.3.2 Determination of the leakage rate (QL) 6 5.3.3 Asses

19、sment of leakage rate . 7 5.4 Function test . 7 6 Designation . 8 7 Inspection report . 8 Annex A (informative) Inspection report for chamber and pump systems for plasma spraying in controlled atmosphere (initial test/retest) . 9 Annex B (informative) Diagram for the chronological sequence of the pr

20、essure change in chamber and an example for the calculation of the leakage rate 11 B.1 Diagram . 11 B.2 Example for the calculation 12 Bibliography . 13 BS EN 13955:2018EN 1395-5:2018 (E) 3 European foreword This document (EN 1395-5:2018) has been prepared by Technical Committee CEN/TC 240 “Thermal

21、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 publication of an identical text or by endorsement, at the latest by February 2019, and conflicting national standards shall be withdr

22、awn at the latest by February 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1395-5:2007. In comparison to the pre

23、vious edition EN 1395-5:2007, the following technical changes have been made: a) normative references were updated; b) added a clause regarding the determination and the assessment of leakage rate; c) added in Annex B an example for calculation of leakage rate EN 1395 series consists of the followin

24、g 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: Manipulator systems; Part 7: Powder

25、feed systems. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedoni

26、a, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13955:2018EN 1395-5:2018 (E) 4 1 Scope This European Standa

27、rd specifies requirements for the acceptance inspection of thermal spraying equipment, in this case the pressurized part only for low pressure and controlled atmosphere plasma spraying, used in spray jobs to produce thermally sprayed coatings of reproducible quality. This part is intended to be used

28、 in conjunction with EN 1395-1, which includes general requirements and explanations of procedures. The plasma spraying system itself is intended to be acceptance inspected according to EN 1395-4. 2 Normative references The following documents are referred to in the text in such a way that some or a

29、ll of their content constitutes requirements 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 ISO 14917, Thermal spraying - Terminology, classification (ISO 14917) 3 Te

30、rms and definitions For the purposes of this document, the terms and definitions given in EN ISO 14917 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online b

31、rowsing platform: available at http:/www.iso.org/obp 3.1 final pressure asymptotically approached value that the pressure reaches in a closed flanged vacuum pump system at usual operating conditions and without further gas inlet 3.2 degassing gaseous de-sorption which can be accelerated by physical

32、processes, e.g. by evacuation, heating 3.3 vapour de-sorption spontaneous evaporation as the decreasing pressure depresses the boiling point to the ambient temperature 3.4 gas ballast of a vacuum pump controlled admission of an amount of gas, in general into the compression room of a vacuum pump to

33、avoid or minimise the condensate formation within the vacuum unit 3.5 gas load total mass flow rate that is applied into the vacuum system Note 1 to entry: Formula: p V/t. The unit is mbar l s1. BS EN 13955:2018EN 1395-5:2018 (E) 5 3.6 leak leakiness within the system caused by material or processin

34、g faults or wrong handling of seals Note 1 to entry: A leak can occur in the chamber or at joint elements. 3.7 leakage rate QLgas flow rate of a leak Note 1 to entry: Formula: p V/t. QLdepends on the pressure difference and the temperature. The unit is 1 Pa m3s1= 1 10 mbar l s1. 3.8 suction rate flo

35、w rate of the gas pumped out of the system Note 1 to entry: Formula: p V/t. The unit is 1 Pa m3s 1= 1 10 mbar l s1. 3.9 controlled atmosphere atmosphere inside the chamber used for thermal spraying where the pressure is maintained within small tolerances 4 Principles of acceptance inspection 4.1 Gen

36、eral 5.1 to 5.4 reveal state of the art technology in thermal spraying equipment. The minimum requirements to achieve a stable parameter setting and maintenance are given in Annex A. 4.2 Typical components A low pressure plasma spraying system contains the following components: vacuum pumping unit;

37、vacuum chamber; manipulator systems; plasma spraying equipment. 5 Procedure for acceptance inspection of vacuum components 5.1 General All values mentioned in 5.2 are valid for a new and clean system only. The acceptance inspection of the low pressure system is divided into the acceptance test of th

38、e vacuum pumping unit and of the vacuum chamber. BS EN 13955:2018EN 1395-5:2018 (E) 6 5.2 Low pressure performance of the pump station For the acceptance test of the vacuum pumps the pump system is to be separated from the chamber mechanically or locked by means of a vacuum slide valve. The evacuati

39、on time from atmospheric pressure to 1 mbar is regarded as an acceptance criteria. This time period for the separated pumping unit shall not exceed 5 min. Subsequently the final vacuum of the pumping system is checked. With this, a value lower than 5 103mbar (0,005 mbar) shall be reached, depending

40、on the type of pump unit, within a period of 30 min if nothing else is specified among the contracting parties. 5.3 Low pressure performance of the chamber 5.3.1 Preparation The chamber volume should be determined according to its internal geometric dimensions. The complete system is consequently te

41、sted without the internal set-up inside the chamber (e.g. manipulator). In order to carry out the vacuum tests it is necessary to maintain the chamber in a condition that is free of dust and any contamination. Therefore, the system should be evacuated for a longer time period to minimize pollutions

42、e.g. removal of de-sorptions of steam and air molecules adsorpted on the chamber walls). Ventilation is recommended to flood the chamber with argon gas while pumping. During the evacuation tests the chamber should be opened for a time period (5 min maximum) to simulate charging of parts to be spray

43、ed. Then, the chamber door sealing is to be cleaned and the system is to be evacuated. The time period for evacuating from atmospheric pressure to 1 mbar should not exceed 15 min. This value is only valid for a chamber in the new condition. Any pollutants by spray material deposits can influence thi

44、s value significantly. Subsequently the leakage rate of the complete system has to be determined. 5.3.2 Determination of the leakage rate (QL) a) The chamber should be evacuated to less than 5 102mbar (0,05 mbar). This should not take longer than 30 min. b) The valve if applicable between the vacuum

45、 chamber and the vacuum pumping system shall be closed. c) For determination of the leakage rate, the vacuum pump system shall be switched off and the pressure rise in the chamber, as well as in the pump system shall be measured. d) For the determination of the leakage rate for a comparable value wi

46、thout the influence of gas pollutions and de-sorption, it is recommended to start the leakage rate determination not earlier than 30 min after switching off the vacuum pumps. e) The increase of the chamber pressure shall be measured in small time intervals (normally 10 s) over a longer period. f) Th

47、e time range of 60 min for the determination of the leakage rate is sufficient. The pressure drop should be observed and recorded by suitable means e.g. pressure gauge and stop watch (use of X/Y printer, PC control unit are recommended). For details, see Annex B. g) The pressure rise per time (e.g.

48、in Pa/s or mbar/s) is determined by the gradient of the received curve. BS EN 13955:2018EN 1395-5:2018 (E) 7 h) The leakage rate QLis determined by the multiplication of the pressure rise per time and the determined volume of the vacuum chamber, see Formula (1). QL= (p90p30) V /t (1) where p30is the

49、 pressure in mbar 30 min after stopping the pump; p90is the pressure in mbar 90 min after stopping the pump; V is the volume of chamber in litre; t is the time range 60 min = 3 600 s. Annex B includes a diagram for the chronological sequence of the pressure change and an example for the calculation of the leakage rate. 5.3.3 Assessment of leakage rate Depending on the type, size and number of vacuum flanges, pipe connections and valves each vacuum system has its own theoretical leakage rate. Also p