EN 16603-35-06:2014
(Main)Space engineering - Cleanliness requirements for spacecraft propulsion hardware
Space engineering - Cleanliness requirements for spacecraft propulsion hardware
ECSS-E-ST-35-06 belongs to the Propulsion 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 contamination,
• 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, (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 standard 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 for 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 including 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-ST-00.
Raumfahrttechnik - Sauberkeitsanforderungen für die Antriebstechnik von Raumfahrtzeugen
Ingénierie spatiale - Exigences de propreté des éléments de propulsion des véhicules spatiaux
Vesoljska tehnika - Zahteve za čistočo pogonske tehnike vesoljskih plovil
Standard ECSS-E-ST-35-06 sodi na pogonsko področje strojništva in zajema zahteve za čistočo pogonskih sestavnih delov, podsistemov in sistemov Standard - določa zahteve za projekt, ki omogočajo čiščenje pogonskih sestavnih delov podsistemov in sistemov in ki se izognejo nastajanju ali neželenemu nabiranju onesnaženja, - opredeljuje zahteve za čistočo (npr. kateri delec/nečistoča/raven vlažnosti je še dopusten), - določa zahteve glede čiščenja v skladu z zahtevami ravni čistoče in zahtevami za verifikacijo, - opredeljuje pristop za čistočo, zahteve za čiščenje (npr. kaj je treba storiti, da se zagotovi, da dopustna raven ni presežena, zahteve za združljivost), - opredeljuje, specificira in določa zahteve v zvezi s pogoji, pod katerimi poteka preverjanje čiščenja ali čistoče (npr. združljivost, preverjanje po okoljskem preskusu). Ta standard velja za večino najbolj pogosto uporabljenih pogonskih sistemov in njihovih povezanih, shranjenih kombinacij goriv: hidrazin (N2H4), monometil hidrazin (CH3N2H3), MON (mešani dušikovi oksidi), dušik (N2), helij (He), propan (C3H8), butan (C4H10) in ksenon (Xe). Ta standard je temelj za industrijo evropskih vesoljskih plovil in pogonsko industrijo za vesoljska plovila za določitev, doseganje in preverjanje zahtevanih ravni čistoče v pogonskem sistemu vesoljskega plovila. Ta standard še zlasti velja za pogon vesoljskih plovil, kot se uporablja za satelite in vesoljska plovila (s posadko) in katerega koli od teh projektov, vključno s podporno opremo na tleh. Zahteve za zunanjo čistočo, npr. izven rezervoarjev in cevi, in vidiki, kot so glive in razplinjevanje, so zajete v standardu ECSS-Q-ST-70-01. Ta standard se lahko prilagodi posameznim lastnostim in omejitvam vesoljskega projekta v skladu s standardom ECSS-S-ST-00.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2014
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Space engineering - Cleanliness requirements for spacecraft propulsion hardware
Raumfahrttechnik - Sauberkeitsanforderungen für die Antriebstechnik von
Raumfahrtzeugen
Ingénierie spatiale - Exigences de propreté des éléments de propulsion des véhicules
spatiaux
Ta slovenski standard je istoveten z: EN 16603-35-06:2014
ICS:
49.140 Vesoljski sistemi in operacije Space systems and
operations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 16603-35-06
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2014
ICS 49.140
English version
Space engineering - Cleanliness requirements for spacecraft
propulsion hardware
Ingénierie spatiale - Exigences de propreté des éléments Raumfahrttechnik - Sauberkeitsanforderungen für die
de propulsion des véhicules spatiaux 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 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 or to any CEN and CENELEC
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 and CENELEC member into its own language and notified to the CEN-CENELEC Management Centre
has the same status as the official versions.
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, Latvia, 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 reserved Ref. No. EN 16603-35-06:2014 E
worldwide for CEN national Members and for CENELEC
Members.
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 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 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 residuals . 25
4.4.4 Requirements on process fluids to meet cleanliness classes . 26
4.5 Test methods . 27
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 requirements. 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-drying . 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 items 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 cleanliness . 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
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 Vacuum 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 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 flow 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” . 53
12 Determination of particle population and NVR analysis . 55
12.1 Microscopic particle population . 55
12.2 Gravimetric NVR analysis method . 56
Annex A (normative) Cleanliness Requirements Analysis (CRA) for
spacecraft propulsion components, subsystems and systems - DRD . 57
Annex B (normative) Cleaning Technique Selection (CTS
...
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