1、Dezember 2016DEUTSCHE NORM Preisgruppe 17DIN Deutsches Institut fr Normung e. V. Jede Art der Vervielfltigung, auch auszugsweise, nur mit Genehmigung des DIN Deutsches Institut fr Normung e. V., Berlin, gestattet.ICS 49.140!%Z;s“2552480www.din.deDIN EN 16602-70-71Raumfahrtproduktsicherung Werkstoffe
2、, Prozesse und Angaben zu ihrer Auswahl;Englische Fassung EN 16602-70-71:2016Space product assurance Materials, processes and their data selection;English version EN 16602-70-71:2016Assurance produit des projets spatiaux Matriaux, procds et les donnes pour leur slection;Version anglaise EN 16602-70-
3、71:2016Alleinverkauf der Normen durch Beuth Verlag GmbH, 10772 Berlin www.beuth.deGesamtumfang 44 SeitenDDIN-Normenausschuss Luft- und Raumfahrt (NL)DIN EN 16602-70-71:2016-12 2 Nationales Vorwort Dieses Dokument (EN 16602-70-71:2016) wurde vom Technischen Komitee CEN/CLC/TC 5 Raumfahrt“ erarbeitet,
4、 dessen Sekretariat vom DIN (Deutschland) gehalten wird. Das zustndige deutsche Normungsgremium ist der Arbeitsausschuss NA 131-06-02 AA Interoperabilitt von Informations-, Kommunikations- und Navigationssystemen (Spiegelausschuss zu CEN/CLC/TC 5)“ im DIN-Normenausschuss Luft- und Raumfahrt (NL). Di
5、eses Dokument (EN 16602-70-71:2016) basiert auf ECSS-Q-ST-70-71C. Dieses Dokument enthlt unter Bercksichtigung des DIN-Prsidialbeschlusses 1/2004 nur die englische Originalfassung von EN 16602-70-71:2016. Dieses Dokument wurde speziell zur Behandlung von Raumfahrtsystemen erarbeitet und hat daher Vo
6、rrang vor jeglicher Europischer Norm, die denselben Anwendungsbereich hat, jedoch ber einen greren Geltungsbereich (z. B. Luft- und Raumfahrt) verfgt. DIN EN 16602-70-71:2016-12 3 Nationaler Anhang NA (informativ) Begriffe und Abkrzungen Die Benummerung der folgenden Begriffe und Abkrzungen ist iden
7、tisch mit der Benummerung in der englischen Fassung. 3 Begriffe und Abkrzungen 3.1 Begriffe aus anderen Normen a) Fr die Anwendung dieses Dokuments gelten die Begriffe nach ECSS-S-ST-00-01 und insbesondere die folgenden Begriffe: 1) Montage; 2) Bauelement; 3) Korrosion; 4) Los; 5) Material; 6) Teil;
8、 7) Prozess; 8) Neubewertung der Restlebensdauer; 9) Reparatur. b) Fr die Anwendung dieses Dokuments gelten die Begriffe nach ECSS-E-ST-32 und insbesondere die folgenden Begriffe: 1) A-Basisdesign zulssig (A-Wert); 2) B-Basisdesign zulssig (B-Wert). 3.2 Fr diese Norm spezifische Begriffe 3.2.1 Platt
9、e Material mit einer Dicke 6 mm 3.2.2 Blech Material mit einer Dicke 0,2 mm und 6 mm 3.2.2. sheet form of material having a thickness 0,2 mm and 1225 MPa UTS. b. Tempers of precipitation hardening steels that are susceptible to stress corrosion and hydrogen embrittlement shall not be used. c. Design
10、s using precipitation hardening steels shall ensure the following: 1. controlled processing procedures are used, and 2. processing and procurement records are maintained for the reference. 4.2.7 Stainless steels a. Unstabilized austenitic steels shall not be used at temperatures above 370 C. b. When
11、 using 400-series stainless steels the risk for hydrogen embrittlement, corrosion and stress corrosion cracking shall be controlled. c. Control means shall be presented for customer approval. 4.2.8 Filler metals: welding, brazing, soldering a. The selection of alloys to be welded and the selection o
12、f process techniques shall be in conformance with national or international aerospace specifications and standards approved by the customer. b. The fusion zone and the unmelted heat affected zone of a weld shall be accessible for inspection. c. All welds used for structural applications shall underg
13、o 100 % radiographic inspection in conformance with specifications approved by the customer. d. All welds used for structural applications shall undergo a NDI program that shall be submitted for customer approval. NOTE ECSS-E-ST-32-01 contains additional requirements specific to welds used for Poten
14、tial Fracture Critical Items applications. e. The capability of the equipment to meet the specified requirements, processes, welding supplies and supplementary treatments selected by the supplier shall be demonstrated through qualification testing of welded specimens representing the materials and j
15、oint configuration of production parts. f. The selection of brazing alloys and brazing techniques shall be in conformance with national or international aerospace specifications and standards approved by the customer. DIN EN 16602-70-71:2016-12 EN 16602-70-71:2016 (E ) 14 g. Design shall include the
16、 effect of the brazing process on the strength of the parent metal. NOTE Base metal is the example of the parent metal. h. Subsequent fusion welding in the vicinity of brazed or soldered joints or other operations with high temperatures that affect the brazed or soldered joint shall not be performed
17、. i. Soldered joints shall not be used for structural applications. j. Solders, process materials and procedures for electrical and electronic assembly shall conform to the requirements from clause 5 to clause 15 of ECSS-Q-ST-70-08 and from clause 5 to clause 16 of ECSS-Q-ST-70-38. 4.2.9 Miscellaneo
18、us metallic materials a. The supplier shall demonstrate that the selected Magnesium alloys are protected against corrosion effects with respect to the applicable environment. b. Hazards related to Magnesium alloys flammability during manufacturing shall be prevented. c. The supplier shall demonstrat
19、e that the selected Magnesium alloys are used in applications where risks of ignition are prevented. NOTE Examples of risk areas are those subjected to wear, abuse, foreign object damage, abrasion, erosion or at any location where fluid or moisture entrapment is possible. d. Alloys containing Beryll
20、ium higher than 4 % by weight shall not be used. e. The design of parts made of beryllium alloys shall include the materials low impact resistance, notch sensitivity, its anisotropy and sensitivity to surface finish requirements. f. The application of refractory alloys shall be subjected to approval
21、 by the customer. NOTE Limited amount of data for structural assessment are available on these materials. g. Silver and Osmium coatings shall not be used on external surfaces of space systems exposed to atomic oxygen in low Earth orbit. h. Platings with open porosity shall be sealed. i. The selectio
22、n of a superalloy for a given application shall be based on tests of the material in simulated in-service environments. j. Foreign material which contains sulphur shall be removed from superalloys prior to heat treatment or high-temperature service. NOTE Examples of materials that can contain sulphu
23、r are: oils, grease and cutting lubricants. k. The effect of alloying element depletion in superalloys at the surface in a high-temperature oxidizing environment shall be evaluated when sheet is used. DIN EN 16602-70-71:2016-12 EN 16602-70-71:2016 (E ) 15 4.2.10 Optical materials a. The supplier sha
24、ll demonstrate that the performances of the selected optical glasses or coatings are not degraded below the specified acceptable levels by ionizing radiation, particle, UV radiation and ATOX for the intended application. b. Use of glasses for the structural applications shall be in conformance with
25、requirements 4.2.21a, 4.2.21b and 4.2.21c. c. When organic glasses are used, a radiation resistance assessment shall be performed. d. In assemblies incorporating optical materials, it shall be demonstrated that the difference in thermal expansion coefficients between the optical material and its mou
26、nting within the specified range of temperatures does not prevent to meet the design requirements. 4.2.11 Adhesives, coatings, varnishes a. The surfaces on which the adhesives, coatings or varnishes are applied shall be clean and dry prior to their application. b. Structural adhesive bonds in honeyc
27、omb panels shall attach the facings rigidly to the core to allow loads to be transmitted from one face to another. c. Adhesives, coatings and varnishes shall be physically and chemically compatible with the component parts of the finished assembly. NOTE This includes for example the adherends for ad
28、hesives, substrates and any other parts, such as materials used in the insulation or bodies of electronic components for coatings. d. Adhesives, coatings and varnishes shall be capable of accommodating dimensional changes resulting from temperature excursions without causing damage to the adhesive b
29、ond, or to other parts of the assembly. NOTE Electronic PCBs are example of other parts of the assembly. e. The supplier shall demonstrate that the mismatch of thermal expansion coefficients between adherends and adhesive or between substrates and coatings is within the design requirements. f. When
30、acceptability of the mismatch of thermal expansion coefficients between adherends and adhesive is verified by test, the test procedure shall conform to the requirements of clause 5 of ECSS-Q-ST-70-04. g. When acceptability of the mismatch of thermal expansion coefficients between substrates and coat
31、ings is verified by test, the test procedure shall conform to the requirements of clause 5 of ECSS-Q-ST-70-04. h. Applications of thick coatings that can result in damage to the coated items shall be evaluated by testing. NOTE Resulting damage can be for example: high residual stresses, high tempera
32、tures during cure. DIN EN 16602-70-71:2016-12 EN 16602-70-71:2016 (E ) 16 i. Alkyd-, polyester- or polysulphide-type coatings shall not be used. j. Any compound that contains or releases corrosive media that can attack adjacent parts of the assembly shall be assessed for its potential risk. NOTE Exa
33、mples of corrosive media are: acetic acid, ammonia, amines, hydrochloric and other acids. k. The supplier shall verify that the curing is affecting the whole surface of the bonded area when adhesives need atmospheric moisture as part of the curing process. NOTE This verification is even more importa
34、nt in case of non-porous or large surfaces. l. The supplier shall demonstrate that solvents contained in coatings and varnishes have been removed prior to curing. NOTE Thinner is example of solvent. m. Adhesives, coatings and varnishes that are sensitive to moisture contamination shall only be used
35、in controlled-humidity environments. n. Where void free application is used on coatings and varnishes the supplier shall apply a debubbling process, defined in a dedicated procedure. 4.2.12 Adhesive tapes a. Tapes containing polyvinylchloride shall not be used in space segment elements or ground seg
36、ment equipment undergoing vacuum. b. All release agents present on the surface of tapes shall be removed. c. The adherent surface or surfaces on which the tape is applied shall be clean and dry prior to its application. d. When an adhesive tape is applied to painted surfaces, the supplier shall veri
37、fy that the paint is not degraded when the adhesive tape is removed. e. An even pressure shall be used on the tape during its application. f. It shall be ensured that the tape is not damaged during its application. g. Perforated tapes should be used to enable the correct evacuation of trapped air bu
38、bbles underneath the adhesive tape. h. When perforated tapes are not used, the process of tape application and removal of bubbles shall be documented. i. The exposure to the space environment shall not impair the function of the tape. j. Surfaces that have had tapes removed for reworking or for temp
39、orary reasons shall be cleaned after the tape is removed. NOTE Adhesives, in particular silicone ones, can leave a residue which prevents adhesion of other systems onto that surface. k. Removed tapes shall not be reused. DIN EN 16602-70-71:2016-12 EN 16602-70-71:2016 (E ) 17 l. The supplier shall de
40、monstrate that the selected Velcro-type tape does not release hooks or felt during assembly or disassembly. m. Conductive adhesive tapes shall be tested to ensure that the specified conductivity and adhesion are maintained at temperature extremes. 4.2.13 Paints and inks a. The surfaces on which pain
41、ts or inks are applied shall be clean and dry prior to their application. b. Contamination of painted surfaces shall be prevented. NOTE For non-moisture curing paints, environmental control applies. c. Painted surfaces shall be protected from mechanical damage. NOTE Examples of mechanical damage: sc
42、ratches and chips. d. Electrical properties of paints shall comply with the requirements from the clause 6 of ECSS-E-ST-20-06. NOTE The requirements to be compliant with, are relevant to external surface materials, where charging requirements apply. 4.2.14 Lubricants a. The selection of the lubrican
43、t shall avoid the contamination of the lubricated part. b. Lubricants shall only be applied to clean surfaces. c. Lubricated items shall be protected from contamination. NOTE Examples of contamination are: dust and dirt. d. When oils and greases are directly exposed to space environment, the supplie
44、r shall demonstrate that the selected grade complies with the mission requirements. e. Graphite alone shall not be used as lubricant under vacuum. NOTE Under vacuum conditions graphite is not a lubricant but an abrasive. It can be used in combination with other lubricating materials such as silver o
45、r MoS2. f. The long-term performance of lubricants shall be assessed during their selection for long-term deployed systems. g. Lubricants containing chloro-fluoro compositions shall not be used with aluminium or magnesium if shear stresses are imposed. DIN EN 16602-70-71:2016-12 EN 16602-70-71:2016
46、(E ) 18 4.2.15 Potting compounds, sealants, foams a. Polysulphide potting material shall not be used. b. Non-metallic foams with an open-cell structure shall not be used. NOTE Open-cell foams are difficult to keep clean. c. The supplier shall assess the effect of shrinkage or the production of exoth
47、ermic temperatures during curing before use. d. Surface treatments shall be used in conformance with process procedures approved by the customer on components and assemblies to ensure adhesion between the component and the potting compound or sealant. NOTE Examples of surface treatments: etching and
48、 priming. e. The supplier shall assess the need of using pre-coating to ensure proper adhesion between the part and the potting compound or sealant and reduce residual stresses created during curing. f. Where void free potting application is used, the supplier shall apply a debubbling process, defin
49、ed in a dedicated procedure. g. Foams with fully closed-cell structure shall not be debubbled. h. All filler materials used in potting compounds shall be dry, as defined by the supplier in a dedicated specification. i. The supplier shall demonstrate that the cure procedures are performed such that the temperatures and pressures created during curing process do not damage the potting compound or the parts being potted. j. All potting, coating and sealing materials used successively shall be evaluated for compatibility. NOTE Some chemical or atmospheric const
