1、STD-AECMA PREN 2904-ENGL L998 LOL23Ll DOL5080 TqZ I AECMA STANDARD prEN 2904 NORME AECMA Edition P 2 AECMA NORM September 1998 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: Supersedes issu
2、e P 1 Descriptors: April 1989 Replace page 1 of the previous issue by this page for aluminium and alutniniuni alloys 1) EN 2900 -Aerospace series - Clamps - Technical specification 2) EN 2905 -Aerospace series - Rubtaer cushioninys for clamps - Dimensions - Masses 2j 3 R eq u ired cli a ra c t e r i
3、 s t ic s 3.1 Material EN 2091 Top half : Bottom half : Rubber cushionitigs for clamps : EN 2905 3 2 Surface treatment EN 2437 Top fialf : Bottom half : 3.3 Configuration - Dimensions - Tolerances The corifiguratiorr sliail correspond with the figures, Dimensions shall correspond with the figures an
4、d tables. 1.l in preparation 2) Published as AECMA prestandard 3) Published as AECMA standard 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-,-,- AECMAAPR
5、EN2404 67 W LOL23LL O004376 T r Issue P 1 prEN 2904 Page 4 F H1 L R Mass 2) 63,O 70,O 2,O 2,8 78,O 8S,O 2,8 2,8 I Figure 1 - Configuration, complete clamp Table 1 - Dimensions I DN 1) c max . 7J-G- ky/1000 pcs 5,76 -.- Tolerances I 32,O +0,4 -0 6,93 7,82 11,6 13,6 9,65 12,7 16,l 21,o 1 6485 16,4 25,
6、O 15,20 +O, 8 -0 30,O I 74,5 to- 106,O 36,5 45, o 22,50 28,SO I- Untolerenced dimensions + - 0,4 mm 1) as per IS0 2964 2) Data referring to the elastomer specific mass of 1,2 y/cm3 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot f
7、or ResaleNo reproduction or networking permitted without license from IHS-,-,-4i,o I 32 I 56,5 AECMA PREN2704 87 m LOL23LL 0004377 L m Issue P 1 prEN 29G9 Paye 5 Identification mark Figure 2 - Configuration, form “All, clamp top half Edges to be rounded - “I 9 $6 11,6 13,6 16,l 21 ,o 25,O 30,O 36,5
8、45,O - Figure 3 - Configuration, form tstj;ti, bottom half Table 2 - Dimensions I l 8,4 I 50,9 I 20 17,h I 70,O I 36 26,4 Dimensions in millimetres 3,6 1,6 20,04 3 16,30 6,20 3,6 1,6 0,04 3 20,60 7,90 Untoleranced dimensions 2 0,4 1) Data referring to the elastomer specific mass of 1,2 g/cm3 Copyrig
9、ht Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Issue P 1 prEN 2904 Page 6 Description block CLAhlP, SADDLE, TOP HALF 4 -Designation Each clamp shall only be
10、designated as in the following exainpies : I denti ty block 1 Descript ion block Identity block EN2904C201 EN2904G1 I CLAMP, SADDLE Number of EN standard C; = Code letter for material I (see EN 2905) DN = Nominal diameter (see table) A = Code letter for form (see figure 2) Form B Description block C
11、LAMP, SADDLE, STTM HALF -Identity block EN2904G; Number of EN standard I C = Code letter for material 1 DN = Nominal diameter (see table) B = Code letter for form (see figure 33 Note : if necessary the originator code 14005 may be ii-itroduced between the description block and the identity block. Co
12、pyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN2704 87 m 1012311 0004377 5 W, _ issue P 1 prEN 2904 Page 7 5 In addition to the manufacturers
13、own rnarlting each clamp shall be msrked in the position inclicatecl using the identity block as defined in clause 4 of tllis standard. A4arking nietliod is at the manufacturers option. h4a r I: i I ig 6 Technical specification As per EN 2900. 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-,-,-
