1、CEN PRENx300L 93 = 3404589 004b707 946 AECMA STANDARD NORME AECMA AECMA NORM prEN 3001 Edition P 1 June 1993 EDITE PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATERIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Descript
2、ors : ENGLISH VERSION Aerospace series Tempered float glass plies for aircraft applications Technical specification Srie arospatiale Plis de verre renforcs pour applications aronautiques Spcification technique Luft- und Raumfahrt Vorgespannte Floatglasscheiben fr Luftfahrzeuganwendungen Technische L
3、ieferbedingungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Te
4、chnical Committee following 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 afected, physically or functionally, without re-identification of the standard. After examination and sig
5、nature of the AECMA Standard Checking Centre (NPSI 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 E.N.A.E. - Technopolis 54
6、 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX Comments should be sent within six months after the date of publication to I Edition approved for publication 1993-06-30 AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE C7 Chairman Mr. B
7、ezaud aecrna 199: CEN PREN*300L 93 3404589 0046708 882 prEN 3001 Page 3 1 Scope This standard specifies the requirements for tempered soda-lime float glass plies which are made from annealed glass either of the universally available type or of high light transmission type. The annealed glass is manu
8、factured by a continuous process for general use. The plies are tempered by either a thermal or chemical process. The tempered glass is used mainly for cockpit glazing. 2 Normative references IS0 489 IS0 11 83 IS0 7991 EN 2155-5 EN 2155-6 EN 2155-8 EN 2155-9 EN 3042 EN 3861 EN 3862 EN 3863 EN 3864 E
9、N 3865 EN 3866 Plastics - Determinatio f the refractive inde of transparent plastics Plastics methods for determining the density and relative density of non-cellular plastics Glass - Determination of coefficient of mean linear thermal expansion Aerospace series - Test methods for transparent materi
10、als for aircraft glazing - Part 5 - Determination of visible light transmission Test methods for transparent materials for aircraft glazing - Part 6 - Determination of optical defects - Aerospace series 1 Aerospace series - Test methods for transparent materials for aircraft glazing - Part 8 - Deter
11、mination of optical distortion Aerospace series - Test methods for transparent materials for aircraft glazing - Part 9 - Determination of haze Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Thermal tempered float glass plies for aircraft gla
12、zing - Material specification 2) Aerospace series - Chemical tempered float glass plies for aircraft glazing - Material specification 2) Aerospace series - Measurement of glass flatness - Test method 2, Aerospace series - Measurement of modulus of rupture of glass - Test method 2, Aerospace series -
13、 Stress/optical measurement of tempered glass - Test method 2, Aerospace series - Measurement of ream and surface ripple in glass - Test method 2, 1) Published as AECMA Standard at the date of publication of this standard Previous page is blank 2) In preparation at the date of publication of this st
14、andard CEN PREN*300L 93 D 3404589 004b709 719 D Thickness (mm) Tolerances (mm) prEN 3001 Page 4 2, 3, 4, 5, 6 8, IO, 12 15 19 f 0,2 f 0,3 f 0,5 f1 3 Definitions 3.1 Universally available float glass Universally available float glass is the standard annealed soda-lime glass manufactured by the float
15、process on a bath of tin. 3.2 High light transmission float glass differs from universally available float glass only by its low iron content, giving it high light transmission extending into the near infra-red. High light transmission float glass 3.3 Tempered glass This is a glass in which a compre
16、ssion layer has been induced at the surfaces either by thermal or chemical means. 3.4 Batch A batch is a quantity of production glass plies, tempered as a group under the same process conditions. 3.5 The effective diameter of an optical defect is the arithmetic mean of the maximum and minimum dimens
17、ions. Effective diameter of non-circular defects 4 Required characteristics 4.1 Composition The glass is of the soda-lime type. The on content of high light transmission glass shall be such that the integrated white light transmission and transmission at 800 nm is in accordance with the material sta
18、ndards EN 3861 and EN 3862. 4.2 Material Materials according to EN 3861 and EN 3862, shall have been made by the float process. 4.3 Standard thickness See table 1. 1) Other thicknesses may be agreed upon between purchaser and manufacturer. CEN PREN+3001 93 W 3404589 0046730 430 W prEN 3001 Page 5 4.
19、4 Dimensions The shape and size of tempered plies will be as agreed between purchaser and manufacturer. 4.5 Density The density shall be measured by method A given in IS0 1 183. 4.6 Linear expansion The coefficient of mean linear expansioii shall be determined in the range 20 OC to 300 OC by the met
20、hod given in IS0 7991. 4.7 Flatness Where it is necessary to measure flatness, the test method given in EN 3863 shall be used. 4.8 Refractive index The refractive index at the sodium D line shall be determined by method A given in IS0 489 using a refractometer. 4.9 Light transmission The visible lig
21、ht transmission shall be determined by the method given in EN 2155-5. For high light transmission glass the transmission shall be measured also at 800 nm by means of a spectrophotometer. 4.10 Haze Haze shall be measured by the method given in EN 2155-9. 4.1 1 Optical distortion The optical distortio
22、n will be measured by the method given in EN 21 55-8. It shall be ignored in a margin of 25 mm, from the glass edge and a radius of 40 mm from the tong support impressions. NOTE : The optical distortion of flat glass is negligible. It may result from die bending and tong support. 4.1 2 Optical defec
23、ts 4.12.1 The plies shall be free from surface contamination, such as can occur from long term storage. 4.12.2 clauses 6.1 to 6.7. The plies shall be examined for optical defects according to EN 2155-6 with the exception of CEN PREN*3001 93 3404589 004bLL 377 prEN 3001 Page 6 4.12.3 are not permitte
24、d. Defects such a tin pick up, tin streaks and top speck, roller impression and old metal marks 4.12.4 be allowed under the following conditions : Bubbles up to 0,5 mm effective diameter and stones up to 0,2 mm effective diameter shall - Not more than two per circular area of 300 mm diameter ; - Not
25、 closer than 150 mm to each other ; - A local accumulation of defects within an area not greater than 125 mm2 shall constitute a single fault, if the sum of the individual defect effective diameters does not exceed 0,5 mm. 4.12.5 Scratches shall be allowed up to a maximum width of 0,03 mm within the
26、 following limits : - The maximum length allowed for any single scratch shall be 30 mm, and no more than 90 mm cumulative length shall be allowed in any one square of 300 mm side. 4.12.6 by the method described in EN 3866. Ream, surface ripple or hammer shall be allowed only if they can be barely se
27、en when viewed 4.1 3 4.13.1 Bending marks Bending marks shall be allowed up to 15 mm from the glass edge. They shall not cause unacceptable local distortion inside a 25 mm margin of the edge as agreed by the purchaser. Bending and thermal tempering optical defects 4.13.2 Checker pattern Checker patt
28、ern due to uneven tempering shall cause minimum strain pattern when viewed through cross polaroids. If unacceptable to the purchaser, a reference standard shall be agreed with the supplier. 4.13.3 Tong impressions For tong supported glass the tickness shall not be reduced by more than one third at t
29、he tong points. Fine cracks from tongs, known as vents, shall not be acceptable if seen outside the tong impression by viewing through cross polaroids. 4.14 Strength 4.14.1 Modulus of rupture The modulus of rupture (MOR) applicable to structural components shall be determined by the method given in
30、EN 3864. The mean MOR and standard deviation shall be determined on glass beams that have been edge worked and tempered to the same standard as the glass components they represent. CEN PREN+300L 73 3V04587 004b7L2 203 prEN 3001 Page 7 4.14.2 Stress profile The stress profile shall be measured by one
31、 of the methods of the test method EN 3865 and established at the qualification stage. 5 Quality assurance 5.1 Qualification Qualification procedures shall be as defined in EN 3042. When qualifying a material the manufacturers shall provide evidence that all the requirements of this standard and the
32、 material standards, EN 3861 or EN 3862, have been achieved on representative material, using the test methods given in column 2 of table 2. If the manufacturer is unable to carry out these tests for lack of equipment, a material testing centre shall be approved by the AECMA-CERT. 5.2 Batch acceptan
33、ce tests Each batch of tempered plies of any manufacturer granted qualification approval, according to this standard, shall be subject to the acceptance tests in column 4 of table 2, the results of which shall be recorded and conform to this standard and the material standard. 6 Storage and packing
34、Glass is normally stored and delivered cn stillages or in wooden crates. If an interweave is used, it shall not damage the glass. 7 Marking Each ply shall be labelled with its batch number. A manufacturing record with the batch number, the date of manufacture and reference to the standard shall acco
35、mpany the ply through subsequent processing in order to provide traceability. 8 Ordering The order shall refer to the drawing or alternative master document for the ply. This shall specify the strength requirements. CEN PRENx300L 93 3404589 O046733 34T prEN 3001 Page 8 Column 1 2 Ref. Characteristic
36、s Test method number Table 2 - Tests 3 4 Number of test specimens for : Qualification Acceptance 4.5 Density 1) IS0 1183 4.6 Linear expansion 1) IS0 7991 method A 4.7 Flatness EN 3863 I I I I - 1 - 1 1 1 per batch if required Optical EN 2155-5 4.8 1 1 per batch 4.9 EN 2155-9 EN 2155-8 EN 2155-6 4.10
37、 - 1 1 1 per batch (if required by 4.1 1) 1 1 per batch 4.1 1 4.14.1 Modulus of rupture 4.14.2 Stress profile 4.1 2 EN 3864 20 (beams) - EN 3865 1 1 per batch every 2 months Refractive index Light transmission (visible) Light transmission (high) Haze Optical distortion Optical defects IS0 489 method A 1 Spectrophotometry 1 per batch
