1、AECMA STANDARD prEN 3624 NORME AECMA Edition P 1 AECMA NORM June 1996 Edition approved for publication PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. 132) 2 775 81 1 O - Fax. (32) 2 775 81 1 1 Comments shoutd be sent within six months af
2、ter the date of publication to C7 Chairman ICs : Descriptors : ENGLISH VERSION Aerospace series Polysulphide sealants, two-component Technical specification Srie arospatiale Produits dtanchit en polysulfures deux composants Spcification technique Luft- und Raumfahrt Zweikomponenten-Polysulfid-Dichtm
3、assen Technische Lieferbedingungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). it is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concern
4、ed Technical Committee folio wing comment by the Member countries. 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 signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technop
6、olis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX 1996-06-28 AECMA Gulledelle 94 6-1 200 BRUXELLES aecma 1996 Mr Wright I Page 3 prEN 3624 : 1996 1 Scope This standard is the technical specification for two-component polysulphide sealants used in the sealing and repair of i
7、ntegral and other non-flexible fuel tanks as well as pressurised cabins and other non-fuel tank areas. The service temperature and the media resistance of the sealants are defined in the relevant material standards. 2 References normative This European Standard incorporates by dated or undated refer
8、ence provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporat
9、ed in it by amendment or revision. For undated references the latest edition of the publication referred to applies. IS0 37 IS0 554 IS0 868 IS0 1817 IS0 2555 IS0 2768-1 IS0 2768-2 IS0 2781 EN 2090 EN 2101 EN 2120 EN 2133 EN 2212 EN 2228 EN 2338 EN 2434-01 Rubber, vulcanized or thermoplastic - Determ
10、ination of tensile stress-strain properties Standard atmospheres for conditioning and/or testing - Specifications Plastics and ebonite - Determination of indentation hardness by means of a durometer (Shore hardness) Rubber, vulcanized - Determination of the effect of liquids Plastics - Resins in the
11、 liquid state or as emulsions or dispersions - Determination of apparent viscosity by the Brookfield test method General tolerances - Part 1 : Tolerances for linear and angular dimensions without individual tolerance indications General tolerances - Part 2: Geometrical tolerances for features withou
12、t individual tolerances indications Rubber, vulcanized - Determination of density Aerospace series - Aluminium alloy 2024-T3 - Clad sheet and strip - 0,4 mm S a 5 6 mm 1) Aerospace series - Chromic acid anodizing of aluminium and wrought aluminium alloys Aerospace series - Steel FE-PA 12 - Softened
13、and cold drawn - Bars and wires - 0,25 mm I D I2,5 mm 1) Aerospace series - Cadmium plating of steels, with specified tensile strength equal to or less than 1 450 MPa, copper, copper alloys and nickel alloys 1) Steel FE-PL43S - 670 MPa I R, I 870 MPa - Sheets - Strips and plates - 0,5 mm I a I20 mm
14、- Aerospace series 1) Steel FE-PA12 - 500 MPa I R, I 700 MPa - Sheets 0,5 mm I a I 6 mm - Aerospace series 1 Sheets, titanium and titanium alloys hot rolled - Thickness 0,8 mm 5 a I 5 mm - Dimensions - Aerospace series 1) Aerospace series - Paints and varnishes - Two components, cold curing polyuret
15、hane finish - Part 1 : minimum requirements 2) 1 ) Published as AECMA Standard at the date of publication of this standard 2) In preparation at the date of publication of this standard Previous page is blank STD-AECMA PREN 3b24-ENGL 177b 1012311 00LZb31 O77 H Page 4 prEN 3624 : 1996 EN 2435 EN 2437
16、EN 2497 EN 2589 EN 2590 EN 2599 EN 3042 EN 3090 EN 3091 EN 3092 EN 3093 EN 3094 EN 3095 EN 3096 EN 3098 EN 3101 EN 3102 EN 3103 EN 3104 EN 3105 EN 3106 EN 3107 EN 3110 Aerospace series - Paints and varnishes - Corrosion resistant chromated two component cold curing primer 1) Aerospace series - Chrom
17、ate conversion coatings (yellow) for aluminium and aluminium alloys 2) Dry abrasive blasting of titanium and titanium alloys Aerospace series - Steel - Sheet and strip, cold rolled - Thickness 0,l mm I a I 3 mm - D me nsions 3) Aerospace series - Steel - Sheets and plates, hot rolled - Dimensions 3)
18、 Aerospace series - Strip in aluminium and aluminium alloys 0,3 mm I a I 3,2 mm - Dimensions 3) Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Test methods for sealants - Ageing conditions for the determination of the effects of accelerated
19、storage 2) Aerospace series - Test methods for sealants - Ageing conditions for the determination of the effects of long term storage 2) Aerospace series - Sealants - Test method - Determination of the non-volatile content 2) Aerospace series - Sealants - Test method - Determination of flow 2) Aeros
20、pace series - Sealants - Test method - Determination of application time 3) Aerospace series - Testing of sealants - Determination of assembly time 2) Aerospace series - Sealants - Test method - Determination of tack-free time 3) Aerospace series - Test method for the determination of the curing rat
21、e of fast curing sealing compounds 2) Aerospace series - Test methods for sealants - Determination of resistance to thermal rupture 2) Aerospace series - Testing of sealants - Flexiblity at low temperatures 2) Aerospace series - Sealants - Determination of resistance to linear debonding 2) Aerospace
22、 series - Testing of sealants - Shear strength 2) Aerospace series - Testing of sealants - Determination of the corrosive effect of sealants on metallic materials 2) Aerospace series - Test methods for sealants - Determination of the resistance of test liquid B to IS0 181 7-1 975 2) Aerospace series
23、 - Testing of sealants - Determination of soluble chromates content 2) Aerospace series - Sealants - Method of manufacture of moulded plates 2) 1) And all other parts, published as AECMA Prestandard and/or in preparation at the date of publication of this standard 2) In preparation at the date of pu
24、blication of this standard 3) Published as AECMA Prestandard at the date of publication of this standard Page 5 prEN 3624 : 1996 EN 3456 Aerospace series - Titanium alloy TI-P 64001 - Annealed - Sheet and strip, hot rolled a I6 mm 1) EN 3997 Aerospace series - Alumnium alloy AL-P2024-T3 - Sheet and
25、strip - 0,4 mm I a I 6 mm 1) EN 6028 Aerospace series - Aluminium alloys - Sheets - Close-tolerance flatness - Dimensions 2) EN 10204 Metallic products - Types of inspection documents MIL-C-27725 Coating, corrosion preventive, for aircraft integral fuel tanks 3 Requirements The requirements shall be
26、 as specified in the relevant EN material standards. The base compound shall cure by the addition of a curing system. The curing system shall possess sufficient colour contrast to the base compound to permit easy identification of an unmixed or incompletely mixed sealant. 4 Definitions For the purpo
27、se of this standard the following definitions apply : 4.1 Qualification testing A series of tests to demonstrate that the product sample submitted for qualification satisfies the requirements specified in the material standard. 4.2 Acceptance testing A reduced series of tests to demonstrate that the
28、 characteristics of a particular production batch conform to the quality characteristics defined in the appropriate material standard. 4.3 Batch A production unit produced in a continuous run by a specified production process from a single mix of the same batches of raw materials. 4.4 Batch combinat
29、ion Combination of production batches of base compound and curing system tested and released for use. 4.5 New sealant A new sealant is a product which has never been qualified by a national body recognized by the aircraft industry according to requirements which are at least equivalent to those defi
30、ned by the relevant EN material standard. 4.6 Established sealant An established sealant is a product which has been qualified by a national body recognized by the aircraft industry according to requirements which are at least equivalent to those defined by the relevant EN material standard. 1 ) Pub
31、lished as AECMA Prestandard at the date of publication of this standard 2) In preparation at the date of publication of this standard Page 6 prEN 3624 : 1996 5 Test fluids The test fluids listed in subclauses 5.1 to 5.6 are defined for testing the properties after fluid immersion. The qualification
32、report shall state type and producer of fluids. 5.1 Test fluid No. I Test fluid i3 to IS0 18 17 5.2 Test fluid No. 2 This is a blend comprising 50 % (by volume) of test fluid No. 1 to subclause 5.1 and 50 % (by volume) of test fluid No. 4 to subclause 5.4. 5.3 Test fluid No. 3 Distilled water having
33、 an electrical conductivity of less than 5 pS/cm 5.4 Test fluid No. 4 Aqueous solution with 3 % sodium chloride 5.5 Test fluid No. 5 Fluid 101 as per IS0 1817 5.6 Test fluid No. 6 Oil No. 3 as per IS0 1817 6 Quality inspection 6. i Quality assurance The requirements as defined in EN 30, 6.2 Qualific
34、ation testing 2 shall ap(: Y- For qualification of a new sealant, the sealant manufacturer shall verify the values of the characteristics required by the relevant material standard, by subjecting a minimum of three separate batch combinations, consisting of three different batches of the base compou
35、nd and three different batches of curing system, manufactured under production conditions to the test methods listed in table 1, column 4. For an established sealant, only the values of one batch of base compound and curing system manufactured under production conditions are to be verified. The valu
36、es shall be satisfied and documented. Qualification shall be performed prior to the first delivery. The extent of qualification testing is specified in the relevant material standard. The manufacturer shall not change the production procedure unless prior written approval has been given by the purch
37、aser. If any change occurs relevant to the material standard or the certified production procedure, the user reserves the right to require a requalification at the manufacturer expense. Should the manufacturer not be in a position to perform the required tests on his own due to the lack of test faci
38、lities, they may be carried out by a materials testing laboratory approved by the customer. 6.2.1 Tests in as-delivered condition In accordance with table 1 STD.AECMA PREN 3b24-ENGL L99b LO123LL 0012634 b Page 7 prEN 3624 : 1996 6.2.1 .I For viscosity determination, a can shall be filled with the ap
39、propriate amount of base compound or curing agent, covered and stored at standard atmosphere IS0 554-23/50-2 for a minimum of 8 h. The base compound or curing agent shall then be thoroughly mixed by stirring slowly for 3 min after which the can shall be closed and the material allowed to stand for n
40、ot less than 1 h. The viscosity according IS0 2555 shall then be determined using a Brookfield RVF viscosimeter or equivalent at (23 k 2) OC. The reading of the highest value shall be taken after 1 min, yet after not less than three revolutions and converted in Pa.s. The chosen can shall provide for
41、 a spacing of not less than 30 mm between the spindle of the viscosimeter and the wall/bottom of the can. Spindle diameter and speed shall be as specified in the relevant material standard. Viscosity of base compound and curing agent 6.2.2 Tests in mixed condition In accordance with table 1 6.2.3 Te
42、sts in cured condition In accordance with table 1 Test sheets shall be prepared as specified in EN 31 10. Unless otherwise specified, curing shall be as defined in the relevant material standard. Curing times deviating sheets shall be indicated in the test report. 6.3 Acceptance testing 6.3.1 Sampli
43、ng The extent of quality control for the acceptance of the production bath shall be specified in agreement between manufacturer and purchaser. The manufacturer shall perform the tests in accordance with table 1. 6.3.2 Tests The tests defined in the material standard, allowing for table 1, shall be p
44、erformed by the manufacturer for each delivery. 6.3.3 Acceptance test certificate The manufacturer shall confirm the conformance to the requirements of this standard for each delivery by means of an acceptance test certificate 3.1.B according to EN 10204 (for example see annex A) to be submitted to
45、the purchaser. 7 Identification marking and packaging 7.1 identification marking 7.1.1 The individual containers shall bear, as a minimum, the following information: Identification marking of individual containers - Designation to material standard ; - Manufacturers product designation ; - Name and
46、address of manufacturer ; - Date of expiry (month, year) ; STD*AECMA PREN 3bZLi-ENGL 177b m 1012311 00LZb35 712 m Page 8 prEN 3624 : 1996 - Storage temperature ; - Mix ratio of individual components ; - Batch number ; - Content of container (SI units) ; - Cautionary marking. The containers for the c
47、uring system shall be marked in such a way as to ensure unequivocal attribution of the corresponding base compound. 7.1.2 Shipping containers shall bear, as minimum, the following information: Identification marking of shipping containers - Designation to material standard ; - Manufacturers product
48、designation ; - Name and address of manufacturer ; - Date of expiry (month, year) ; - Storage temperature ; - Batch number ; - Number of individual containers ; - Cautionary marking ; - Purchase or order number. 7.2 Packing The individual containers for base compound and curing agent shall be so pac
49、ked in shipping containers as to prevent damages during transportation. Base compound and curing agent shall be separately filled in individual containers, closing of containers shall be airtight. Prior to closing the base compound containers, the remaining space may be filled with an inert gas and/or secured by other suitable means to ensure safe storage. For the purpose of dispatch, the individual containers (base compound plus curing agent) shall be packed together in a shipping container in a manner which prevents accidental separation of related individual containers
