ASD-STAN PREN 3909-2014 Aerospace series Test fluids for electrical and optical components and sub-assemblies (Edition P 3).pdf

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1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 3909 Edition P 3 September 2014 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONRue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.orgICS: Supersedes edition P 2 of Marc

2、h 2005 and will supersede EN 3909:2007Descriptors: ENGLISH VERSION Aerospace series Test fluids for electrical and optical components and sub-assemblies Srie arospatiale Fluides dessais pour composants et sous-ensembles lectriques et optiques Luft- und Raumfahrt Prfflssigkeiten fr elektrische und op

3、tische Bauteile und Untergruppe This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approve

4、d by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination

5、 and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level

6、by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 1st September 2014 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2014 by ASD-STAN p

7、rEN 3909:2014 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Test fluids . 4 4 Test samples 4 5 Test procedures . 4 6 Test temperatures 4 7 Health and safety . 4 8 Information to be supplied in the product standard 5 9 List of test fluids 5 10 General guidance . 7 Foreword This

8、standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 3909:2014 (E) 3 1 Scope This

9、 standard specifies the list of test fluids to be used to demonstrate that components and sub-assemblies will not be adversely affected by contamination by fluids types that they may typically be exposed to. The fluids listed are representative of those commonly used and encountered in airborne and

10、ground operations, and align with the requirements of fluids susceptibility of ISO 7137. This shall not be considered an exhaustive list and additional test fluids may be instructed in the product standard, against which compliance needs to be demonstrated. This standard, when used in conjunction wi

11、th the test requirements defined in Clause 6 or the product standard shall be considered the starting point to test a component to determine its minimum performance capability when exposed to the fluids listed. Test results obtained from a number of sources over a considerable period of time have sh

12、own that, in many cases, widely varying results can be obtained when using fluids that are used in service. The practice of specifying fluids based on performance criteria rather than their constituents can mean variations in test results between batches of the fluid obtained from different manufact

13、urers, or even from the same manufacturer. For this reason the EN 3909 Standard recommends the use of “standard test fluids“ which are specified by their constituents and contain the chemicals that may be found in commonly used fluids. Where equipment may be exposed to fluid types that are not cover

14、ed by Table 1 or where specific test fluids are considered to be necessary, the product standard shall identify the particular fluid required. If a manufacturer chooses to include additional test fluids (e.g. to satisfy a customer requirement), they do so at their own risk. 2 Normative references Th

15、e following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2349-4

16、05, Aerospace series Requirements and test procedures for relays and contactors Part 405: Fluid resistance EN 2591-315, Aerospace series Elements of electrical and optical connection Test methods Part 315: Fluid resistance EN 3475-411, Aerospace series Cables, electrical, aircraft use Test methods P

17、art 411: Resistance to fluids EN 3745-411, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 411: Resistance to fluids EN 3841-405, Aerospace series Circuit breakers Test methods Part 405: Fluid resistance EN 4057-303, Aerospace series Cable ties for harnesses Test methods

18、Part 303: Resistance to fluids ISO 1817, Rubber, vulcanized Determination of the effect of liquids ISO 7137, Aircraft Environmental conditions and test procedures for airborne equipment ISO 11075, Aircraft De-icing/anti-icing fluids ISO type ISO 11078, Aircraft De-icing/anti-icing fluids ISO types I

19、I, III and IV MIL-PRF-87937, Cleaning compound, aerospace equipment 1)AMS 1428G, Fluid, aircraft deicing/anti-icing, Non-Newtonian (Pseudoplastic), SAE Types II, III and IV 2)1) Published by: DoD National (US) Mil. Department of Defense http:/www.defenselink.mil/ 2) Published by: SAE National (US) S

20、ociety of Automotive Engineers http:/www.sae.org/ prEN 3909:2014 (E) 4 AMS 1476B, Deodorant, Aircraft Toilet 2)ASTM D740, Standard Specification for Methyl Ethyl Ketone 2)3 Test fluids Unless specified in the relevant product standard, test specification or test method, all test fluids listed in Tab

21、le 1, of this standard, are mandatory. To ensure the optimum performance of all the test fluids, the shelf life and storage conditions must be maintained in accordance with the fluid manufacturers recommendations. 4 Test samples The test sample shall be either, a component or an assembly, as specifi

22、ed in the test method and/or product standard. The size and/or physical arrangement of each test sample or test assembly shall enable complete sample immersion into the test fluid in accordance with the test procedure. 5 Test procedures Unless otherwise stated in the product standard, the following

23、component types shall be tested in accordance with either; EN 2349-405 for relays and contactors, EN 2591-315 for electrical connectors and accessories, EN 3475-411 for cables, EN 3745-411 for fibre optic components, EN 3841-405 for circuit breakers or EN 4057-303 for cable ties, to confirm they are

24、 not susceptible to the fluids listed in Table 1. For any other types of components requiring testing using the fluids listed in Table 1, the appropriate test procedures shall be as defined in the relevant product standard. NOTE Unless otherwise specified in the product standard, the test specificat

25、ion shall control the complete test procedure including instructions such as cleaning the test samples and the choice of cleaning fluids (this should not result in further contamination). 6 Test temperatures Test temperatures and flash point temperatures are as detailed in Table 1. The test temperat

26、ures comprise a soak temperature in the test fluid; a conditioning period and a heat soak stage in air. The samples shall be inspected at ambient after the 3 stage cycle(s) as required by the product standard or technical specification. The test temperatures listed in Table 1 comprise the recommende

27、d immersion fluid temperature followed by the recommended oven circulated air temperature. E.G. A sample to be tested in test fluid Gasoline to ISO 1817 Liquid B (test fluid ref 1a), shall be immersed for 15 min to 20 min at 40 C in the gasoline and removed. Stored for 7 h to 7,5 h at 23 C. Placed i

28、n the oven for 16 h to 16,5 h at the relevant third phase temperature (refer to the product standard technical specification or test specification for the oven temperature). 7 Health and safety It is the responsibility of the user to ensure all local and industrial health and safety requirements are

29、 followed during and after the test program. i.e. storage, use and disposal of test fluids. The relevant Material Safety Data Sheet shall be consulted to establish safe handling of each fluid listed and tested. If there is any doubt the fluid supplier/manufacturer shall be consulted. If the test tem

30、perature results in the fluid becoming a gas, the test authority shall determine the applicability of the test and the test facility shall ensure all health and safety measures are adhered to. prEN 3909:2014 (E) 5 8 Information to be supplied in the product standard The following information shall b

31、e supplied in the product standard: 1 Test procedures/method(s) to be used. 2 The quantity and sizes (including styles, etc.) of test samples. 3 Any departures from the test fluids and/or test protocol listed in this standard and the test procedure. 4 The test sample configuration (if not described

32、by the relevant test procedure). 5 The pass/fail criteria for the characteristics under assessment. Table 1 makes reference to a test fluid number. This reference may appear in the relevant test instruction as a numeric or a numeric and alpha. The new test reference numbers have been adopted to allo

33、w the selection of new fluids in accordance with changing environmental and business needs. The old test fluid references shall not be used for test fluid call-up in new specifications. It is recommended that, wherever practical the test fluid shall be referred to by its full name or specification.

34、9 List of test fluids For test fluids refer Table 1. The relevant Material Safety Data Sheet (and the fluid supplier/manufacturer if necessary) shall be consulted to establish the characteristics and any special handling requirements associated with each fluid listed and tested. This includes establ

35、ishing if a fluid is conductive or not. The fluid manufacturer shall be consulted if there are any doubts about a fluid or its characteristics. prEN 3909:2014 (E) 6 Table 1 List of test fluids (1 to 2) Test fluid No. Fluid family Type Test fluid to be used (Consider Note 1) Fluid in service (for ref

36、erence) Test temperature 2 C Flash point C New Old 1a 1 Fuels Gasoline Toluene 30 % Isooctane 70 % v/v ISO 1817 Liquid B AVGAS-100LL NATO-F-18 40 4 1b 2 (Hydro Carbon) Kerosene ISO 1817 Liquid F AVTUR/FSI NATO-F-34 (JP-8) 70 40 AVTUR NATO-F-35 AVTAG/FSII NATO-F-40 (JP-4) AVCAT/FSII NATO-F-44 (JP5) 1

37、c n/a Biofuel As specified in the product standard. As specified in the product standard. See Note 2. See Note 3. 2a 3 Hydraulic Fluids Phosphate based ISO 1817 Liquid 103 Synthetic Fluid H580 Skydrol 500B4 Skydrol 5 70 160 2b 4 Silicone Based NATO-S-1714 NATO-S-1714, ZX-42 80 140 2c 5 Mineral Based

38、 NATO-H-520 OM-18 NATO-H-515, OM-15 NATO-H-520 80 80 3a 6 Oils Mineral Based NATOO-1176, OMD-90 125 200 3b 7 NATO-O-142 NATO-O-142, OM-12 70 120 3c 8 Synthetic Oil Diester ISO 1817 Liquid 101 NATO-O-147, OX-14 150 260 NATO-O-149, OX-38 See Note 2. See Note 3. 3d 9 Synthetic Oil NATO-160, OX-26 NATO-

39、O-156, OX-27 See Note 2. See Note 3. Polyol ester NATO-O-148, OX-9 See Note 2. See Note 3. NATO-O-160, OX-26 See Note 2. See Note 3. 4a 10 Cleaning Fluids Solvent Isopropanol. See Note 4 NATO-S-737, AL-11 50 12 4b n/a See Note 1. Ethanol. See Note 4. NATO-S-738 See Note 2. See Note 3. 4c 11 Propanol

40、 25 % White spirit 75 % v/v NATO-S-752 NATO-S-753 25 See Note 3. 4d 12 Solvent MethylethylketoneASTM-D740 Methylethylketone ASTM-D740 25 4 4e 13 Detergent MIL-PRF-87937 Type IV 25 See Note 3. 4f 16 Sullage AMS 1476B 5 % solution AMS 1476B See Note 2. See Note 3. prEN 3909:2014 (E) 7 Table 1 List of

41、test fluids (2 to 2) Test fluid No. Fluid family Type Test fluid to be used (Consider Note 1)Fluid in service (for reference) Test temperature 2 C Flash pointC New Old 5a 14 De-icing Runway De-icers. 50 % Inhibited Potassium Acetate in Water 25 See Note 3.5b 15 Aircraft De-icers. On Ground Ethylene

42、Glycol 80 % Water 20 % v/v AMS 1428. See Note 4. NATO-S-742 25 200 5c n/a Mono-propyleneGlycol. See note 4 ISO 11075 ISO 11078 See Note 2. See Note 3.5d Aircraft De-icers.In Flight NATO-S-745 AL-5 NATO-S-745 AL-5 See Note 2. 177 6a 17/18 Fire Extinguishant See Notes 5 either test fluid may be used f

43、rom those indicated in the relevant fluid family. NOTE 5 Due to restrictions and applicable by local laws, fire extinguishant shall not be discharged in non-critical situations. NOTE 6 It is not possible to perform fluid immersion tests in a liquid state (on this gas) under standard Laboratory condi

44、tions. 10 General guidance Components and equipment used in aircraft may be subjected to contamination by fluids, either through normal operation, accidental spillage or through leakage from faulty pipes or pipe joints. The contaminating fluid may not be at an elevated temperature, but a component o

45、r equipment may become contaminated while at an elevated working temperature or after having been contaminated. Any effects may depend on the behavior of the contaminant at elevated temperature (e.g. if it is volatile it may disappear rapidly, but if it is non-volatile it may slowly oxidizes and a r

46、esidue may remain). Contamination effects may include packaging failure, crazing or swelling of plastics and rubbers, leaching of anti-oxidants and other soluble materials, seal failures, adhesion failures, paint/legend removal and corrosion. Fuel (Fluid type 1) In most cases fuels will be gasoline

47、or kerosene. Gasoline is expected to evaporate rapidly, possibly with few permanently harmful effects. Kerosene is more persistent and damaging to many elastomers, particularly at elevated temperature. prEN 3909:2014 (E) 8 Fuels do not normally affect paints and most plastics, but silicone resin bon

48、ded boards may tend to de-laminate after prolonged exposure. Fuels may include additives to inhibit icing, or to dissipate static charges. Additives may increase the severity of the fuel and this shall be considered when selecting the fuel for a fluid test. Hydraulic fluid (Fluid type 2) In most cas

49、es hydraulic fluids, will be mineral oil or ester-based synthetic fluid. Ester-based synthetic fluids are damaging to most elastomers and plastics. Phosphate based ester synthetic fluids are especially damaging to elastomers, plastics and paint finishes. Lubricating oil (Fluid type 3) Lubricating oils will be either mineral or synthetic based. Mineral oil is damaging to n