SANS 51395-5-2009 Thermal spraying - Acceptance inspection of thermal spraying equipment Part 5 Plasma spraying in chambers《热喷涂 热喷涂设备验收检查 第5部分 箱室内等离子喷涂》.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22405-9 SANS 51395-5:2009 Edition 1 EN 1395-5:2007 Edition 1SOUTH AFRICAN NATIONAL STANDARD Thermal spraying Acceptance inspection of ther

4、mal spraying equipment Part 5: Plasma spraying in chambers This national standard is the identical implementation of EN 1395-5:2007 and is adopted with the permission of CEN, rue de Strassart 36, B-1050 Brussels. WARNING Can only be used in conjunction with SANS 51395-1. Published by SABS Standards

5、Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 51395-5:2009 Edition 1 EN 1395-5:2007 Edition 1 Table of cha

6、nges Change No. Date Scope National foreword This South African standard was approved by National Committee SABS TC 107, Metallic and other inorganic coatings, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was pu

7、blished in April 2009. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN13955 January2007 ICS25.220.20 SupersedesEN1395:1996 EnglishVersion ThermalsprayingAcceptanceinspectionofthermalspraying equ

8、ipmentPart5:Plasmasprayinginchambers ProjectionthermiqueContrledacceptationdumatriel deprojectionthermiquePartie5:Projectionauplasmaen chambre ThermischesSpritzenAbnahmeprfungenfrAnlagen zumthermischenSpritzenTeil5:Plasmaspritzenin Kammern ThisEuropeanStandardwasapprovedbyCENon23December2006. CENmem

9、bersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropean Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcerningsuchnational standardsmaybeobtainedonapplicationtotheCENManagementCentreortoanyCENmemb

10、er. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytranslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCENManagementCentrehasthesamestatusasthe officialversions. CENmembersarethenationalstandardsbodiesofAustria,Bel

11、gium,Bulgaria,Cyprus,CzechRepublic,Denmark,Estonia,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Romania,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDE

12、NORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2007CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN13955:2007:EThis standard may only be used and printed by approved subscription and freemailing clients of t

13、he SABS.EN 1395-5:2007 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principles of acceptance inspection5 5 Procedure for acceptance inspection of vacuum components5 6 Designation 7 7 Inspection report7 Annex A (informative) Inspection report for chamb

14、er and pump systems for plasma spraying in controlled atmosphere (initial test/retest).8 Bibliography 10 This standard may only be used and printed by approved subscription and freemailing clients of the SABS.EN 1395-5:2007 (E) 3 Foreword This document (EN 1395-5:2007) has been prepared by Technical

15、 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 publication of an identical text or by endorsement, at the latest by July 2007, and conflicting nationa

16、l standards shall be withdrawn at the latest by July 2007. This document together with EN 1395-1, 1395-2, 1395-3, 1395-4, 1395-6 and 1395-7 supersedes EN 1395:1996. EN 1395 consists of the following Parts, under the general title Thermal spraying Acceptance inspection of thermal spraying equipment:

17、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 feed systems. According to the CEN/CENELEC Internal Regulations, the national standards organizations o

18、f 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, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slo

19、vakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. This standard may only be used and printed by approved subscription and freemailing clients of the SABS. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.EN 1395-5:2007 (E) 4 1 Scop

20、e This European Standard specifies requirements for the acceptance inspection of thermal spraying equipment, in this case the pressurised part only for low pressure and controlled atmosphere plasma spraying, used in spray jobs to produce thermally sprayed coatings of reproducible quality. This part

21、should be used in conjunction with EN 1395-1, which includes general requirements and explanations of procedures. The plasma spraying system itself should be acceptance inspected according to EN 1395-4. 2 Normative references The following referenced documents are indispensable for the application o

22、f 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 3 Terms and definitions For the purposes of this document, the te

23、rms and definitions given in EN 657:2005 and the following apply. 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

24、 by physical 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 va

25、cuum pump to avoid or minimise the condensate formation within the vacuum unit 3.5 gas load total p V/t flow that is applied to the vacuum system NOTE The unit is mbar l s 1 . 3.6 leaks leakiness within the system caused by material or processing faults or wrong handling of sealings NOTE A leak can

26、occur in the camber or at joint elements. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.EN 1395-5:2007 (E) 5 3.7 leakage rate LR p V/t flow for gas by a leak NOTE LR depends on the pressure difference and the temperature. The unit is 1 Pa m 3

27、s 1= 1 10 mbar l s 1 . 3.8 suction power p V/t flow of the gas pumped out of the system NOTE The unit is 1 Pa m 3s 1= 1 10 mbar l s 1 . 3.9 controlled atmosphere atmosphere inside the chamber used for thermal spraying where the pressure is kept constantly or in small tolerances 4 Principles of accep

28、tance inspection 4.1 General 5.1 to 5.4 reveal state of the art technology in thermal spraying equipment and the minimum requirements concerning a stable parameter setting and maintenance given in Annex A. 4.2 Typical components A low pressure plasma spraying system contains the following components

29、: vacuum pumping unit; vacuum chamber; manipulator systems; plasma spraying equipment. 5 Procedure for acceptance inspection of vacuum components 5.1 General All values mentioned in the following clause are valid for a new and clean system only. For the acceptance test period the filter elements sha

30、ll be taken out. The acceptance inspection of the low pressure system is divided into the acceptance test of the vacuum pumping unit and of the vacuum chamber. 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 cha

31、mber mechanically or locked by means of a vacuum slide valve. The evacuation 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 This standard may only be

32、used and printed by approved subscription and freemailing clients of the SABS.EN 1395-5:2007 (E) 6 system is checked. With this, a value lower than 5 10 3mbar (0,005 mbar) shall be reached, depending on the set-up, within a period of 30 min if nothing else is specified among the contracting parties.

33、 5.3 Low pressure performance of the chamber 5.3.1 Preparation The chamber volume has to be determined according to internal geometrical dimensions. The complete system is consequently tested without the internal set-up inside the chamber (e.g. manipulator). In order to carry out the vacuum tests it

34、 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 minimise pollutions (e.g. removal of de-sorptions of steam and air molecules adsorpted on the chamber walls). Ventilation is recommen

35、ded to flood the chamber with argon gas while pumping. Applying the evacuation tests the chamber should be opened for a time period of max. 5 min to simulate charging of parts to be sprayed. Then, the chamber door sealing is to be cleaned and the system is to be evacuated. The time period for evacua

36、ting from atmospheric pressure onto 1 mbar should not exceed 15 min. This value is only valid to a chamber in the new condition. Any pollutants by spray material deposits can influence this value significantly. Subsequently the leakage rate of the complete system has to be determined. Identical prep

37、arations are to be applied as for the acceptance test of the pumping unit. 5.3.2 Leakage rate The chamber pressure should amount to at least 5 10 2mbar (0,05 mbar) after 30 min evacuation time. For determination of the leakage rate, the vacuum pump system has to be switched off and the pressure rise

38、 in the chamber, as well as in the pump system shall be measured. 5.3.3 Determination of the leakage rate (LR) For the determination of the leakage rate for a comparable value without the influence of the rest of the gas pollutions and de-sorption, it is recommended to start the leakage rate determi

39、nation not before 30 min after switch off the vacuum pumps. The time range of 1 h 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). LR

40、= (p 90 p 30 ) C vol /T (1) where p 30is the pressure after 30 min pump stopping; p 90is the pressure after 90 min pump stopping; C volis the volume of chamber; T is the time range 60 min = 3 600 s. Subsequently, the complete system is tested, inclusive of all internal settings (e.g. manipulator, ro

41、bot, gun), with regard to the evacuation times. The leakage rate for the complete system including the internal settings and with the chamber locked from the pumping unit shall not exceed 6 10 3mbar l s 1(0,006 mbar l s 1 ). This standard may only be used and printed by approved subscription and fre

42、emailing clients of the SABS.EN 1395-5:2007 (E) 7 5.4 Function test For the function test of the complete system with the internal set-up inside the chamber (e.g. manipulator) it has to be evacuated to a pressure of 5 10 2mbar (0,05 mbar). This evacuation time shall not exceed 30 min. Subsequently,

43、the plasma system is started with argon gas after ventilation with argon to a suitable plasma start pressure greater than 5 mbar. To check the requirements concerning controlled atmosphere conditions the constant pressure regulation under spraying conditions are to be determined for 50 mbar, 100 mba

44、r, 150 mbar, 200 mbar and 250 mbar chamber pressure experimentally. The maximum deviation of the adjusted chamber pressure can be tolerated as follows: 10 mbar to 200 mbar: 5 mbar; 200 mbar to 500 mbar: 10 mbar. Applying acceptance inspection of the automatic chamber pressure control the plasma gas

45、flow through the gun is to vary specifically. 6 Designation Acceptance inspection of the thermal spraying equipment for plasma spraying in cambers shall be designated as follows: Acceptance inspection according to EN 1395-5. 7 Inspection report An example for the inspection report is given in Annex

46、A. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.EN 1395-5:2007 (E) 8 Annex A (informative) Inspection report for chamber and pump systems for plasma spraying in controlled atmosphere (initial test/retest) The initial test/retest fulfils the

47、requirements of the acceptance inspection according to EN 1395-5. User:. Manufacturer:. Year of manufacture: . Type of equipment: Type of spray gun: . Type of pump system: CE-documentation complete: yes / no Pressure Evaluation Item tested, where applicable value in mbar time in min measured time in

48、 min actual deviation in % passed failed Low pressure performance 1 5 pump station 0,005 30 chamber 0,05 30 Leakage rate (LR) 0,05 0 30 chamber pressure 90 pressure difference p 90 p 30 leakage rate (LR = (p 90 p 30) C vol 3 600 10,006 mbar l s 1Pressure Evaluation Item tested, where applicable set point in mbar tolerance in mbar measured actual pressure in mbar actual deviation in % passed failed Functional test 50 5 100 5 150 5 200 5 250 10 chamber pressure 300 10 This standard may only be used and printed by app