1、BSI Standards PublicationBS EN 16603-35-06:2014Space engineering Cleanliness requirements forspacecraft propulsion hardwareBS EN 16603-35-06:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN16603-35-06:2014.The UK participation in its preparation was entruste
2、d to TechnicalCommittee ACE/68, Space systems and operations.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The
3、British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 84094 4ICS 49.140Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 Septem
4、ber 2014.Amendments issued since publicationDate Text affectedBS EN 16603-35-06:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16603-35-06 September 2014 ICS 49.140 English version Space engineering - Cleanliness requirements for spacecraft propulsion hardware Ingnierie spatiale - Exigence
5、s de propret des lments de propulsion des vhicules spatiaux Raumfahrttechnik - Sauberkeitsanforderungen fr die Antriebstechnik von Raumfahrtzeugen This European Standard was approved by CEN on 1 March 2014. CEN and CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which s
6、tipulate 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 or to any CEN and CENELEC member.
7、 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 and CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official ve
8、rsions. CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latv
9、ia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN/CENELEC All rights of exploitation in any form and by any means reser
10、ved worldwide for CEN national Members and for CENELEC Members. Ref. No. EN 16603-35-06:2014 EBS EN 16603-35-06:2014EN 16603-35-06:2014 (E) 2 Table of contents Foreword 6 1 Scope . 7 2 Normative references . 8 3 Terms, definitions and abbreviated terms 10 3.1 Terms from other standards 10 3.2 Terms
11、specific to the present standard . 10 3.3 Abbreviated terms. 13 3.4 Symbols 13 4 Cleanliness requirements 14 4.1 General . 14 4.2 Design requirements . 15 4.2.1 General . 15 4.2.2 Components 15 4.2.3 System 17 4.2.4 Ground support equipment (GSE) . 17 4.3 Manufacturing . 18 4.3.1 General . 18 4.3.2
12、Manufacturing processes 18 4.3.3 Machined parts . 18 4.3.4 Tubing and manifolds 18 4.3.5 Components 20 4.3.6 Subsystems and systems 21 4.3.7 Final rinsing solutions 21 4.4 Cleanliness classes definition . 22 4.4.1 Particulate . 22 4.4.2 Non-volatile residues (NVR) 25 4.4.3 Dryness and liquid residua
13、ls . 25 4.4.4 Requirements on process fluids to meet cleanliness classes 26 4.5 Test methods 27 BS EN 16603-35-06:2014EN 16603-35-06:2014 (E) 3 4.6 Code usage 27 5 Cleaning techniques 28 5.1 General . 28 5.2 Environment, health and safety. 29 5.2.1 General . 29 5.2.2 Hardware configuration requireme
14、nts 29 5.2.3 Cleaning process approval 30 5.3 Pre-cleaning . 30 5.3.1 General . 30 5.3.2 Mechanical pre-cleaning . 30 5.3.3 Chemical pre-cleaning 31 5.4 Precision cleaning. 32 5.4.1 General . 32 5.4.2 Re-cleaning operational systems 32 5.5 Drying methods 33 5.5.1 General . 33 5.5.2 Gaseous purge-dry
15、ing . 33 5.5.3 Drying sample . 34 5.5.4 Flow rates during purging 35 5.5.5 Vacuum drying procedure . 35 5.6 Excepted components, subsystems and systems . 36 6 Cleanliness verification requirements 37 6.1 Surface . 37 6.1.1 Visual and UV inspection 37 6.1.2 pH-test 37 6.2 Acceptance inspection of ite
16、ms cleaned in a controlled environment 38 6.2.1 General . 38 6.2.2 Test fluids . 38 6.2.3 Test fluid volume for analysis 39 6.2.4 Analysis of test fluid-flush sample (solvent) . 39 6.2.5 Analysis of aqueous-based, liquid-flush sample 40 6.2.6 Drying . 41 6.2.7 Vacuum drying 41 6.3 Maintaining cleanl
17、iness . 42 6.3.1 Pressurant gas purge 42 6.3.2 Installation and marking of temporary hardware 42 6.3.3 Temporary hardware replacement 42 BS EN 16603-35-06:2014EN 16603-35-06:2014 (E) 4 6.3.4 Component replacement . 43 6.4 Dryness verification 43 6.4.1 General . 43 6.4.2 Purge dryness . 43 6.4.3 Vacu
18、um dryness . 43 6.4.4 Sample test and qualified procedure . 44 7 Acceptance inspection of packaging materials . 45 7.1 Environmental control . 45 7.2 Sampling 45 7.3 Thickness of packaging film 45 7.4 Static electricity . 46 7.5 Verification of cleanliness level . 46 7.5.1 General . 46 7.5.2 Minimum
19、 surface area for test . 46 7.5.3 Sample preparation . 46 7.5.4 Rinsing procedures . 47 8 Packaging and protection 48 8.1 Approved coverings 48 8.2 Packaging operations . 48 8.3 Certification labels 49 9 Deliverables 50 10 Test procedures 51 10.1 Test liquid-flush procedure (solvent) . 51 10.2 Gas f
20、low test procedure 51 11 Sampling and analytical practices 52 11.1 Cleanliness level test methods 52 11.1.1 General . 52 11.1.2 Method I “Liquid Flush Test” 52 11.1.3 Method II “Liquid Flow Test” 53 11.1.4 Method III “Gas Flow Test” 53 11.1.5 Method IV “Liquid flow test under operating conditions” 5
21、3 12 Determination of particle population and NVR analysis . 55 12.1 Microscopic particle population . 55 12.2 Gravimetric NVR analysis method 56 BS EN 16603-35-06:2014EN 16603-35-06:2014 (E) 5 Annex A (normative) Cleanliness Requirements Analysis (CRA) for spacecraft propulsion components, subsyste
22、ms and systems - DRD 57 Annex B (normative) Cleaning Technique Selection (CTS) for spacecraft propulsion components, subsystems and systems - DRD . 59 Annex C (normative) Cleanliness Certificate (CC) for spacecraft propulsion components, subsystems and systems - DRD . 61 Annex D (normative) Typical
23、test and cleaning liquids 64 Annex E (informative) Pre-cleaning sequences 67 Annex F (informative) Cleanliness certificate . 69 Bibliography . 71 Figures Figure F-1 : Example of a cleanliness certificate. 70 Tables Table 4-1: Cleanliness classes . 24 Table 4-2: NVR contamination levels 25 Table 4-3:
24、 Visible contamination levels . 27 Table 7-1: Packaging materials 46 Table E-1 : Typical pre-cleaning sequence for common materials 67 BS EN 16603-35-06:2014EN 16603-35-06:2014 (E) 6 Foreword This document (EN 16603-35-06:2014) has been prepared by Technical Committee CEN/CLC/TC 5 “Space”, the secre
25、tariat of which is held by DIN. This standard (EN 16603-35-06:2014) originates from ECSS-E-ST-35-06C rev.1. 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 March 2015, and conflicting national sta
26、ndards shall be withdrawn at the latest by March 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document has been prepared
27、 under a mandate given to CEN by the European Commission and the European Free Trade Association. This document has been developed to cover specifically space systems and has therefore precedence over any EN covering the same scope but with a wider domain of applicability (e.g. : aerospace). Accordi
28、ng to the CEN-CENELEC Internal Regulations, the national standards organizations 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 Macedonia, France, Germany, G
29、reece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 16603-35-06:2014EN 16603-35-06:2014 (E) 7 1 Scope ECSS-E-ST-35-06 belongs to the Propuls
30、ion field of the mechanical discipline, and concerns itself with the cleanliness of propulsion components, sub-systems and systems The standard defines design requirements which allow for cleaning of propulsion components sub-systems and systems and which avoid generation or unwanted collection of c
31、ontamination, identifies cleanliness requirements (e.g. which particle / impurity / wetness level can be tolerated), defines requirements on cleaning to comply with the cleanliness level requirements, and the requirements on verification, identifies the cleanliness approach, cleaning requirements, (
32、e.g. what needs to be done to ensure the tolerable level is not exceeded, compatibility requirements), identifies, specifies and defines the requirements regarding conditions under which cleaning or cleanliness verification takes place (e.g. compatibility, check after environmental test). The standa
33、rd is applicable to the most commonly used propulsion systems and their related storable propellant combinations: Hydrazine (N2H4), Mono Methyl Hydrazine (CH3N2H3), MON (Mixed Oxides of Nitrogen), Nitrogen (N2), Helium (He), Propane (C3H8), Butane (C4H10) and Xenon (Xe). This standard is the basis f
34、or the European spacecraft and spacecraft propulsion industry to define, achieve and verify the required cleanliness levels in spacecraft propulsion systems. This standard is particularly applicable to spacecraft propulsion as used for satellites and (manned) spacecraft and any of such projects incl
35、uding its ground support equipment. External cleanliness requirements, e.g. outside of tanks, piping and aspects such as fungus and outgassing are covered by ECSS-Q-ST-70-01. This standard may be tailored for the specific characteristic and constraints of a space project in conformance with ECSS-S-S
36、T-00. BS EN 16603-35-06:2014EN 16603-35-06:2014 (E) 8 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this ECSS Standard. For dated references, subsequent amendments to, or revisions of any of these publicati
37、ons, do not apply. However, parties to agreements based on this ECSS Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references the latest edition of the publication referred to applies. EN reference
38、Reference in text Title EN 16601-00-01 ECSS-S-ST-00-01 ECSS system Glossary of terms EN 16603-35 ECSS-E-ST-35 Space engineering Propulsion general requirements EN 16602-40 ECSS-Q-ST-40 Space product assurance Safety EN 16602-70-01 ECSS-Q-ST-70-01 Space product assurance Cleanliness and contamination
39、 control. EN 16602-70 ECSS-Q-ST-70 Space product assurance Materials, mechanical parts and processes ISO 2210:1972 Liquid halogenated hydrocarbons for industrial use-Determination of residue on evaporation ISO 5789:1979 Fluorinated hydrocarbons for industrial use Determination of non-volatile residu
40、e ISO 5884:1978 Aerospace Fluid systems and components Methods for system sampling and measuring the solid particle contamination of hydraulic fluids ISO 14951-3:2000 Space systems Fluid characteristics Part 3: Nitrogen ISO 14951-4:2000 Space systems Fluid characteristics Part 4: Helium ISO 14951-10
41、:2000 Space systems Fluid characteristics Part 10: Water ISO 14952-3:2003 Space systems Surface cleanliness of fluid systems Part 3: Analytical procedures for the determination of non-volatile residues and particulate contamination BS EN 16603-35-06:2014EN 16603-35-06:2014 (E) 9 ASTM D257(99) 2005 S
42、tandard Test Method for DC Resistance or Conductance of Insulating Materials ASTM D329 10 Dec 2002 Standard specification for Acetone ASTM D740 15 May 2005 Standard specification for Methyl Ethyl Ketone ASTM D770-05 15 May 2005 Standard specification for Isopropyl Alcohol ASTM D1152 1 Apr 2006 Stand
43、ard specification for Methanol (Methyl Alcohol) ASTM D1293 10 Dec 1999 Standard test methods for pH of water ASTM D4376 Standard specification for vapor-degreasing grade Perchloroethylene MIL-PRF-27415B 8 Feb 2007 Performance specification, propellant pressurizing agent, Argon O-E-760D 28 May 1987 F
44、ederal specification SEMI C47-0699 May 1999 Guideline for Trans 1,2 Dichloroethylene BS EN 16603-35-06:2014EN 16603-35-06:2014 (E) 10 3 Terms, definitions and abbreviated terms 3.1 Terms from other standards For the purpose of this Standard, the terms and definitions from ECSS-S-ST-00-01 and ECSS-E-
45、ST-35 apply. 3.2 Terms specific to the present standard 3.2.1 accuracy measure of how close a value is to the “true” value 3.2.2 blank result for an analytical sample of the virgin test fluid prior to use in performing a cleanliness verification test 3.2.3 cleanliness verification activity intended
46、to verify that the actual cleanliness conditions of an item are in conformance with the applicable specification 3.2.4 condensable hydrocarbon hydrocarbon capable of going from a gaseous to a liquid or solid state at ambient temperature and pressure 3.2.5 crazing creating microvoids in glassy thermo
47、plastic polymers preceding the formation of cracks 3.2.6 critical surface any surface of an item that contacts the service medium NOTE Examples of service media are propellants and pressurants. 3.2.7 dewar double-walled vessel with the annular space between the walls evacuated to provide insulation
48、BS EN 16603-35-06:2014EN 16603-35-06:2014 (E) 11 3.2.8 dew point temperature at which condensation of water vapour takes place at prevailing pressure NOTE The prevailing pressure is usually atmospheric pressure. 3.2.9 fibre flexible structure having a length-to-width ratio of 10 to 1 or greater NOTE
49、 1 A fibre is considered to be a particle, see clause 3.2.14. NOTE 2 The size of a fibre is its maximum length. 3.2.10 field cleaning processes of pre-cleaning and precision cleaning of components, subsystems and systems which cannot be processed in a controlled environment such as a clean room 3.2.11 generally clean free from manufacturing residue, dirt, oil, grease, processing debris, or other extraneous contamination based on visual examination 3.2.12 high-efficiency particulate air filter filter that is at least 99,97 % efficient by volum
