BS EN 16603-35-06:2022 – TC:2023 Edition
$280.87
Tracked Changes. Space engineering. Cleanliness requirements for spacecraft propulsion hardware
| Published By | Publication Date | Number of Pages |
| BSI | 2023 | 138 |
EN 16603-35-06 (equivalent of 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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | 30465818 |
| 65 | A-30436602 |
| 66 | undefined |
| 73 | 1 Scope |
| 74 | 2 Normative references |
| 76 | 3 Terms, definitions and abbreviated terms 3.1 Terms from other standards 3.2 Terms specific to the present standard |
| 78 | 3.3 Abbreviated terms |
| 79 | 3.4 Symbols 3.5 Nomenclature |
| 80 | 4 Cleanliness requirements 4.1 General |
| 81 | 4.2 Design requirements 4.2.1 General 4.2.2 Components 4.2.2.1 Tanks 4.2.2.2 Tubing and manifolds |
| 82 | 4.2.2.3 Valves and regulators 4.2.2.4 Filters 4.2.2.5 Instrumentation |
| 83 | 4.2.2.6 Injectors 4.2.2.7 Thrust chambers 4.2.3 System 4.2.4 Ground support equipment (GSE) |
| 84 | 4.3 Manufacturing 4.3.1 General 4.3.2 Manufacturing processes 4.3.3 Machined parts 4.3.4 Tubing and manifolds |
| 85 | 4.3.5 Components |
| 87 | 4.3.6 Subsystems and systems 4.3.7 Final rinsing solutions 4.4 Cleanliness classes definition 4.4.1 Particulate |
| 91 | 4.4.2 Non-volatile residues (NVR) 4.4.3 Dryness and liquid residuals |
| 92 | 4.4.4 Requirements on process fluids to meet cleanliness classes |
| 93 | 4.5 Test methods 4.6 Code usage |
| 94 | 5 Cleaning techniques 5.1 General |
| 95 | 5.2 Environment, health and safety 5.2.1 General 5.2.2 Hardware configuration requirements |
| 96 | 5.2.3 Cleaning process approval 5.3 Pre-cleaning 5.3.1 General 5.3.2 Mechanical pre-cleaning 5.3.2.1 General |
| 97 | 5.3.2.2 Ultra-sonic cleaning 5.3.3 Chemical pre-cleaning 5.3.3.1 General 5.3.3.2 Neutralisation process |
| 98 | 5.4 Precision cleaning 5.4.1 General 5.4.2 Re-cleaning operational systems |
| 99 | 5.5 Drying methods 5.5.1 General 5.5.2 Gaseous purge-drying |
| 100 | 5.5.3 Drying sample 5.5.3.1 General 5.5.3.2 Reliability sample 5.5.3.3 Procedure reliability 5.5.3.4 Drying test |
| 101 | 5.5.4 Flow rates during purging 5.5.5 Vacuum drying procedure 5.5.5.1 General 5.5.5.2 Apparatus and reagents 5.5.5.3 Heating |
| 102 | 5.5.5.4 Vacuum drying 5.5.5.5 Drying by internal evacuation 5.6 Excepted components, subsystems and systems |
| 103 | 6 Cleanliness verification requirements 6.1 Surface 6.1.1 Visual and UV inspection 6.1.2 pH-test |
| 104 | 6.2 Acceptance inspection of items cleaned in a controlled environment 6.2.1 General 6.2.2 Test fluids 6.2.3 Test fluid volume for analysis |
| 105 | 6.2.4 Analysis of test fluid-flush sample (solvent) 6.2.4.1 General 6.2.4.2 Particle population analysis (solvent-flush) 6.2.4.3 NVR analysis (solvent-flush) |
| 106 | 6.2.5 Analysis of aqueous-based, liquid-flush sample |
| 107 | 6.2.6 Drying 6.2.6.1 General 6.2.6.2 Purge drying 6.2.6.3 Inspection after purge drying 6.2.7 Vacuum drying |
| 108 | 6.3 Maintaining cleanliness 6.3.1 Pressurant gas purge 6.3.2 Installation and marking of temporary hardware 6.3.3 Temporary hardware replacement |
| 109 | 6.3.4 Component replacement 6.4 Dryness verification 6.4.1 General 6.4.2 Purge dryness 6.4.3 Vacuum dryness |
| 110 | 6.4.4 Sample test and qualified procedure |
| 111 | 7 Acceptance inspection of packaging materials 7.1 Environmental control 7.2 Sampling 7.3 Thickness of packaging film |
| 112 | 7.4 Static electricity 7.5 Verification of cleanliness level 7.5.1 General 7.5.2 Minimum surface area for test 7.5.3 Sample preparation |
| 113 | 7.5.4 Rinsing procedures |
| 114 | 8 Packaging and protection 8.1 Approved coverings 8.2 Packaging operations 8.3 Certification labels |
| 116 | 9 Deliverables |
| 117 | 10 Test procedures 10.1 Test liquid-flush procedure (solvent) 10.2 Gas flow test procedure |
| 118 | 11 Sampling and analytical practices 11.1 Cleanliness level test methods 11.1.1 General 11.1.2 Method I “Liquid Flush Test” |
| 119 | 11.1.3 Method II “Liquid Flow Test” 11.1.4 Method III “Gas Flow Test” 11.1.5 Method IV “Liquid flow test under operating conditions” |
| 121 | 12 Determination of particle population and NVR analysis 12.1 Microscopic particle population |
| 122 | 12.2 Gravimetric NVR analysis method |
