1、AECMA PREN3278 88 303Z313 0005382 2 _ - Edition approved for publication Comments should be sent within six months after the date of DUbliCatiOn decision A.E.C. M.A. STANDARD NORME A.E.C.M.A. A.E.C.M.A. NORM C3 Chairman prEN 3278 Issue P 1 October 1988 UDC : EDIT PAR LASSOCIATION EUROPENNE DES CONST
2、RUCTEURS DE MATRIEL AEROSPATIAL 88. boulevard Malesherbes, 75008 PARIS - TL. 45-63-82-85 Key words : ENGLISH VERSION Aerospace series Sleeves, tubular, protruding head, in corrosion resisting steel, passivated (0,25 mm wall thickness) Srie arospatiale Douilles tubulaires, tte saillante en acier rsis
3、tant la corrosion, passiv (Epaisseur de paroi 0.25 mm) Luft- und Raumfahrt Hlsen, berstehender Kopf, aus korrosionsbestandigem Stahl, passiviert (Wanddicke 0.25 mm) This Aerospace Series, pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Mat
4、riel Arospaiial). It is published on green paper for the needs of AECMA-Members. It has been technically approvedby the experts of the concerned AECMA Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed
5、to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination 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 E
6、uropean Standard to CEN (European Committee for Standardization) for final vote. Mr. ARENA I A.Ec.M.A. I 88, Bd. Malesherbes 17th October 1988 75008 PARIS - FRANCE aecma 198 AECMA PREN3278 88 E 1012311 0005183 4 prEN 3278 Page 3 1 Scope and field of application This standard specifies the charncter3
7、stics and echnical requirements for protruding head tubular sleeves , in corrusion resistlng steel, which may be plain or provide2 with a ser;ies O annular grooves. They are for use in aerospace assemblies whose maximim; operating terUperature does not exceed 650 “C. 2 References IS0 2859, Sampling
8、procediires and tables for inspection by attribiltes EN 2175, Heat resisting steel PE-PA93HTY solution treated and precipi- tation treated - Sheets and strips a - 3 mi -= Aerospace series Eh 2424, Aerospace series - Identificatlori marking of standard fasteners EN 2516, Aerospace series - Passivatio
9、n of corrosion resistant steels 1) 3 Definitions 3.1. Crack : Rupture in the material which may extend in any direction and which may be intercrystalline or transcrystalline in character. 3.2. Seam : Open surface defect which is the result- of the extrusion of the material. 3.3. Lap : Surface defect
10、 caused by folding over metal fins cr sharp corners and then rolling or forging them into rhe surface. 4 Required characteristics 4.1. Configuration - Dinensions -e Tolerances The configiiration shall be in accordance with the figure ; the dimensions and tolerances shall cmform to the values shown i
11、n the figure and in tables 1 and 2 after passivstion. 4.2. Surf ace roughness See figure. The vdues apply after passivation. 4.3 Material Steel EN 2175, received ir, the annealad condit-m and cold worked during manufacture. 4.4. Surface treatment Passivation EN 2516. 1) In preparation. -. O 245m.05
12、88T4 Previous page is blank - - I IAECMA - PREN3278 88 M 303233L 0005384 b W prEN 3278 Page 4 Grooved fomr Code C Unspecified dimensions: a8 plain form X 1,5 (pitch pf I- D iame t e 1: Code 040 050 060 oso 1 oc! I grooves) Figure - Configuration Table 1 - Dimensions mas. D min. 3,999 4,993 5,999 7,9
13、94 9 , 994 3,96C 4,960 5,960 7 ,955 9,955 E max . 4,499 5,499 6,499 8,494 10,494 min. 4,474 5,474 6,474 8,470 10,r;o F -i - 0,3 895 10 1i,5 14,s 17,5 H - i- 0,5 K + - 0,5 4 535 7 7 io - 0245MR0588T4 AECMA PREN3278 88 LO12311 0005185 8 _- - _ prEN 3278 Page 5 Table 2 - Lengths and masses Dimensions i
14、n millimetres Diameter code 040 050 060 080 100 Length Form + 095; Mass kg/1000 pieces 1) i I 105 I I 120 Plain ! 135 ! 150 : 165 i 180 195 .! i 210 i i 225 1 240 ! 255 f rooved i - 1 oj 3 435 G 7Y5 9 10,5 12 13,5 15 16,5 18 19,5 21 22,5 24 25,5 I j 0,167 0,206 . 0,246 O , 285 O , 325 O , 364 0,404
15、O, 443 i 0,483 O , 520 O , 562 i 0,601 - 0,641 ! : 0,680 I 0,720 ! 0,759 i I ! I i l 25 0,215 1 *- 1 - - 0,264 I 0,325 ! i ! t 0,312 I 0,383 0,489 0,361 1 0,441 0,565 0,410 0,499 i 0,642 I I 0,459 US557 * 0,719 I 0,508 O,U15 0,795 0,556 0,673 0,872 0,605 0,731 0,949 0,654 i 0,790 1,025 I I : - - i i
16、 0,799 I 0,894 i 0,989 1,085 : I ! 1,180 i 1,276 i 1,371 I 0,703 i 0,848 1,102 1,466 . 0,751 . 0,906 1,179 1,562 I 0,800 , 0,964 1,256 , 1,657 . I 0,849 I 1,022 1,332 ; 1,753 , 0,898 1,080 1,409 j 1,848 I ! 0,947 i 1,133 Sampling In conformity with IS0 2859, using normal or reduced inspection methods. The acceptable quality level (AQL) is 1 %. 0245MR0588T4
