1、AECMA STANDARD NORME AECMA AECMA NORM prEN 3909 Edition P 2 March 2005 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8110 - Fax. + 32 2 775 8111 - www.aecma-stan.org ICS: 49.060 Supersedes edition P 1 March 1995 Desc
2、riptors: ENGLISH VERSION Aerospace series Test fluids for electric components and sub-assemblies Srie arospatiale Fluides dessais pour composants et sous-ensembles lectriques Luft- und Raumfahrt Prfflssigkeiten fr elektrische Bauelemente und Untergruppen This “Aerospace Series“ Prestandard has been
3、drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the
4、 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 and review by users and formal agreement of AECMA-STAN, it will be submitted as a dr
5、aft 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 by giving the EN the status of a national standard and by withdrawing any national
6、standards conflicting with the EN. Edition approved for publication 31 March 2005 Comments should be sent within six months after the date of publication to AECMA-STAN Electrical Domain Copyright 2005 by AECMA-STAN Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by
7、 IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 2 prEN 3909:2005Foreword This standard was reviewed by the Domain Technical Coordinator of AECMA-STANs Electrical Domain. After inquiries and votes carried out in accordance with the
8、rules of AECMA-STAN defined in AECMA-STANs General Process Manual, this standard has received approval for Publication. Contents Page 1 Scope 3 2 Normative references 3 3 Test fluids . 4 4 Test samples 4 5 Cleaning 4 6 Initial examination. 5 7 Test methods . 5 8 Method 1. 5 9 Method 2. 5 10 Final ex
9、amination 9 11 Information to be supplied in the product standard 9 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 3 prEN 3909:2005 1 Scope This
10、standard specifies tests to demonstrate that components and sub-assemblies will not be adversely affected by contaminating fluids to which they may be exposed. The fluids listed are representative of those commonly used and encountered in airborne and ground operations, and align with the requiremen
11、ts of Section 11 Fluids susceptibility of ISO 7137. Fluids not listed, and for which a test is required, should be included in the product standards. These tests are not intended to demonstrate the suitability of components and sub-assemblies to perform in continuous contact with a fluid e.g. on an
12、immersed fuel pump. Nor are they tests to demonstrate immunity from electrolytic corrosion. It shall be used together with TR 4542. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies.
13、For undated references, the latest edition of the referenced document (including any amendments) applies. TR 4542, Aerospace series Guidance for fluids tests Technical report. 1) ISO 1817, Rubber, vulcanized Determination of the effect of liquids. ISO 7137, Aircraft Environmental conditions and test
14、 procedures for airborne equipment. ISO 11075, Aerospace Aircraft de-icing/anti-icing Newtonian fluids, ISO type I. ISO 11078, Aerospace Aircraft de-icing/anti-icing non-Newtonian fluids, ISO type II. MIL-PRF-680, Degreasing solvent. 2) MIL-PRF-5606H, Hydraulic fluid, petroleum base, aircraft, missi
15、le, and ordnance. 2) MIL-PRF-6085D, Lubricating oil: Instrument, Aircraft, Low volatility. 2) MIL-PRF-7808L, Lubricating oil, aircraft turbine engine, synthetic base, nato code number O-148. 2) MIL-PRF-7870C, Lubricating oil general purpose low temperature. 2) MIL-PRF-23699F, Lubricating oil, aircra
16、ft turbine engine, synthetic base, nato code number O-156. 2) MIL-PRF-87252C, Coolant fluid, Hydrolytically stable, dielectric. 2) MIL-PRF-87937D, Cleaning compound, Aerospace equipment. 2) STANAG 3748, Hydraulic fluid, petroleum (h-515, h-520 and c-635) and polyalphaolefin (h-537, h-538 and h-544).
17、 3) AMS 1428, Fluid, aircraft deicing/anti-icing, non-newtonian (pseudoplastic), sae types II, III, and IV 4) AMS 1476B, Deodorant, Aircraft Toilet. 4) 1) In preparation at the date of publication of this standard. 2) Published by: Department of Defense (DOD), The Pentagon, Washington D.C. 20301, US
18、A 3) Published by: NATO Military Agency for Standardization (MAS); B-1110 Brussels, Belgium 4) Published by: Society of Automotive Engineering (SAE), 400 Commonwealth Drive, Warrendale, PA 15096, USA Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under lice
19、nse with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 4 prEN 3909:2005 3 Test fluids The product standard shall specify the required test fluids which shall, wherever possible, be selected from the list given in Table 1. Each fluid has been specified a
20、s being representative of a group of fluids. The product standard shall also specify any additional fluids not listed in Table 1 for which a test is required. 4 Test samples 4.1 The test sample shall be either: a component; or an assembly. Where size or availability of an assembly shall not permit a
21、 full test, a specially selected representation of materials, finishes and components used in an assembly shall be used as a test sample. The test samples for materials or finishes should have a minimum surface area, where possible, of 20 cm2. 4.2 Unless otherwise indicated in the technical specific
22、ation, the following details shall be specified in the product standard: the number and type of sample to be tested. 5 Cleaning 5.1 Initial cleaning Unless otherwise specified in the product standard, the test sample shall be thoroughly cleaned to remove unrepresentative coatings i.e. preservatives,
23、 grease or contaminants. When a separate sample is specified for each fluid, only initial cleaning applies. 5.2 Intermediate cleaning If sequential testing is required, the product standard shall specify any necessary cleaning method. When more than one fluid is to be applied to a test sample, the f
24、ollowing should be considered: The need to assess the effect of individual fluids; The possibility of synergistic effects from applying successive fluids; If the order of exposure to fluids in service life is known, or if the exposure to fluids recognized as having synergistic effects is known and i
25、s possible in service life, then this order should be specified; Whether the test sample should be cleaned between or after the test. NOTE Choice of cleaning fluid shall clearly not result in further contamination. Some of the specified fluids may be used as a cleaning fluid (e.g. aviation fuel, sol
26、vents, cleaning fluids) otherwise a fluid known to be used in normal cleaning procedures should be used. 5.3 Final cleaning The product standard shall specify any necessary cleaning method prior to final examination. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided
27、by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 5 prEN 3909:20056 Initial examination 6.1 The test sample shall be visually examined and its condition recorded. 6.2 The product standard shall specify any measurements or tests req
28、uired. 7 Test methods 7.1 Two test methods are given in 8 and 9. The product standard shall specify the test or tests to be used and the order of application of the test fluids if sequential testing is required. For information on the selection of the appropriate method, see TR 4542. 7.2 The product
29、 standard shall specify whether the test sample is to be connected electrically or mechanically and, if it is required to operate before, during or after the procedure, the operating parameters shall also be defined. 8 Method 1 8.1 Mount the test sample in its normal operating configuration and main
30、tain at room temperature, or as specified in the product standard. 8.2 Dip, brush or spray the test sample with the specified fluid which shall be maintained at the test temperature given in Table 1, or as specified in the product standard. Ensure that the entire surface of the sample is thoroughly
31、wetted. Allow the sample to drain naturally for 5 min to 10 min; shaking or wiping is not permitted. 8.3 Transfer the test sample to a test chamber and maintain at the test temperature for the time specified in the product standard. If not specified, the parameters shall be (65 2) C for (160 08+ ) h
32、. 8.4 At the end of the period allow the test sample to return to room temperature, and remain at room temperature for between 1 h and 2 h, before being subjected to final examination. 8.5 Repeat this procedure, if specified by the product standard. 9 Method 2 9.1 Immerse the test sample fully in th
33、e specified test fluid which shall be maintained at the temperature and for the time stated in the product standard. If the temperature and/or duration are not specified, the temperature shall be as given in Table 1 and the duration shall be a minimum of (24 1) h. 9.2 Transfer the test sample to a t
34、est chamber and maintain at the test temperature and for the time specified in the product standard. If not specified, the parameters shall be (65 2) C for (160 08+ ) h. 9.3 At the end of the period allow the test sample to cool to room temperature, and remain at room temperature for between 1 h and
35、 2 h, before being subjected to final examination. NOTE This procedure is not intended to demonstrate the operation of an equipment which is normally immersed in a fluid. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleN
36、o reproduction or networking permitted without license from IHS-,-,-Page6 prEN3909:2005Table 1 List of fluids Fluids to be used for the test Observations or corresponding symbols Fluids family Test fluid No Type Base Alternative Allowable test temperature C 2 C Flash-point C Ref. Standard 1 Gasoline
37、 Toluene 30 % Isooctane 70 % v/v ISO 1817 Liquid B 40 4 AVGAS Fuels 2 Kerosene ISO 1817 Liquid F 70 40 a F44 F34 F35 F40 AVCAT/FS11 AVTUR/FS11 AVTUR AVTAG 3 Phosphate base ISO 1817 Liquid 103 70 160 Synthetic fluid H 580 NSA 307110 Type IV SYDROL 500B4 SKYDROL 5 MOBIL EXXON 4 Silicone base NATO-S-17
38、14 80 140 NATO-S-1714 ZX-42 Hydraulic fluid 5 Mineral base Stanag 3748 (NATO-H-520) (MIL-PRF-5606H) 80 80 NATO-H-515 OM-15 6 Mineral base NATO-O-1176 125 200 NATO-O-1176 OMD-90 7 Mineral base NATO-O-142 (MIL-PRF-7870C) 70 120 NATO-O-142 OM-12 Synthetic oil ISO 1817 Liquid 101 NATO-O-147 (MIL-PRF-608
39、5D) OX-14 Oils 8 DIESTER 150 260 NATO-O-149 OX-38 continued Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 7prEN3909:2005Table 1 List of fluids (
40、continued) Fluids to be used for the test Observations or corresponding symbols Fluids family Test fluid No Type Base Alternative Allowable test temperature C 2 C Flash-point C Ref. Standard Synthetic oil NATO-O-156 (MIL-PRF-23699F) OX-27 NATO-O-148 (MIL-PRF-7808L) OX-9 Oils (continued) 9 POLYOL EST
41、ER NATO-O-160 OX-26 Isopropanol 50 12 a NATO-S-737 AL-11 or 10 Solvent Ethanol NATO-S-738 11 Solvent Propanol 25 % + white spirit 75 % v/v 25 NATO-S-752 (MIL-PRF-680 type 1) NATO-S-753 (MIL-PRF-680 type 2) 12 Solvent Methylethyl ketone 25 4 a Cleaning fluids 13 Detergent MIL-PRF-87937D 25 MIL-PRF-87
42、937D 14 Runway de icers 50 % inhibited potassium acetate in water 25 Not applicable De-icing 15 Aircraft de icers Ethylene glycol 80 % + water 20 % v/v AMS 1428 Mono-propylene glycol ISO 11075 ISO 11078 25 200 Glycol base NATO-S-742 NATO-S-745 continued Copyright Association Europeene des Constructe
43、urs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 8 prEN3909:2005Table 1 List of fluids (concluded) Fluids to be used for the test Observations or corresponding symbols Fluids family Test fluid
44、No Type Base Alternative Allowable test temperature C 2 C Flash-point C Ref. Standard Sullage 16 Cleaning fluid AMS 1476B 25 Not applicable 17 Heptafluoropropane 25 Not applicable Heptafluoropropane HFC-227 Fire extinguish-ants 18 Pentafluoroethane 25 Not applicable Pentafluoroethane HFC-125 Cooling
45、 19 Coolanol 25 R Radar coolant Substituted by ISO 1817 liquid 103 177 MIL-PRF- 87252C Aeroshell fluid 602 Polyalphaolefin PAO a When the test temperature is near to, or exceeds, the flash point, precautions shall be taken during the test (i.e. highly effective ventilation and the test shall be perf
46、ormed in a suitable pressure vessel) Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 9 prEN 3909:20059 10 Final examination 10.1 The test sample s
47、hall be cleaned in accordance with 5.3. 10.2 Examine the test sample visually and record any change of condition from the initial examination. 10.3 The product standard shall specify any measurements or tests required. 11 Information to be supplied in the product standard The following information s
48、hall be supplied in the product standard: test fluids to be used (see 3); details of test sample(s) (see 4); cleaning procedure if required (see 5); initial examination (see 6); test method(s) to be used (see 7.1); order of application of fluids for sequential test if applicable (see 7.1); connections and operations during the test method(s) if required (see 7.2); test sample configuration and initial temperature if other than normal operating configuration at room temperature (see 8.1 and 9.1); test fluid temperature if other t
