1、AECMA STANDARD NORME AECMA AECMA NORM prEN 3250 Edition P 2 Avril 1994 UDC DIT PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 Supersedes issue P 1 December 1989 Key words : ENG
2、LISH VERSION Aerospace series Pipe coupling 8O30 in titanium alloy Elbow 90 swivel nut Srie arospatiale Raccordement 8O30 en alliage de titane Raccord querre 90 avec crou prisonnier Luft- und Raumfahrt Rohrverschraubung 8O30 aus Titan Winkelverschraubung 90 ein seitig mit berwurfmutter This “Aerospa
3、ce Series“ Prestandard has responsibility of AECMA (Association Europenne des Constructeurs published on green paper for the needs of AECMA-Members. It has proved by the experts of the concerned Technical Committee er countries. the technical content shall not be changed to physically or functionall
4、 y, without re-iden tifica tion of the standar After exami re of the AECMA Standard Checking Centre INPSI and formal ervices of the Member countries it will be submitted as a draft European Stanvard to CEN (European Committee for Standardization) for formal vote. Replace page 1 of the previous issue
5、 by this page Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX Withdrawal approved 1994-04-29 Comments should be sent within six months after the date of publication to AECMA Technopolis - 175, rue Jean-Jacques Rouss
6、eau 921 38 Issy-les-Moulineaux Cedex - FRANCE C 4 Chairman Mr. Staib aecma 1994 IAECMA PREN3250 89 = LOL23Ll 000505L 9 prEN 3250 Page 2 Contents 4 5 6 Scope and field of application References Requ i red character i st i cs Designation Marking Technical specification SAE interest: Future revision of
7、 this siandard shall be cor 1070 MPa - Forgings - 2) De ,. 50 mm In reparation $1 PubYished as AECMA pre-standard AECMA PREN3250 B W 3032333 0005053 2 W prEN 3250 Page 4 3 Required characteristics 3.1 Configuration-Dimensions-Tolerances The configuration shall be in accordance with the figure; the d
8、imensions and tolerances shall conform with the values shown in the figure and table after anodizing but prior to application of dry film lubricant. The dimensions quoted are those required by design to meet installation and systems requirements. Dimensions and tolerances not quoted are at manufactu
9、rers option subject to meeting the qualification and acceptance requirements of EN 3275. 3.2 Surface roughness See figure. Unless other values of referenced design standards are specified. Values apply before anodizing. 3.3 Material (for elbow) Titanium alloy: EN 3315 3.4 Surface treatment (for elbo
10、w) Anodizing: EN 2808 Lubrication: EN 2491 on thread, sealing face and sliding area only. Break all shurp edges 0.1 mm to 0.4 mrn Thread 2 Mark t ng I / -1 Thread 1 Thread end per EN 3274 Form C Figure - Configuration * Also drill depth dimension AECMA PREN3250 89 LOL23LL 0005054 Li 2 Thread 22) 4H
11、5H - 3N I) 35 06 08 10 12 14 16 18 20 22 25 28 32 - - - - - A E F S R W4 10.2 Ref 10.2 Ref -0.1 h13 O prEN 3250 Page 5 6.6 7.5 Table Dimensions - tolerances and mass 10.85 15.29 Dimensions in mi 11 imetres MJ 141.5 MJ 161.5 Thread 12) 40 6e 20.8 32.6 24 1.8 1.0 11 21.8 33.5 25 21 1.0 13 MJ 10x1 MJ 1
12、21.25 MJ 141.5 MJ 161.5 MJ 181.5 MJ 201.5 MJ 221.5 MJ 241.5 MJ 271.5 MJ 301.5 MJ 331.5 MJ 361.5 MJ 391.5 9.4 9.3 19.56 24.51 MJ 10x1 (I6.3/Z*.81 19 1 14 11.0 1 8 MJ 121.25 17.8 27.7 21 16 1.0 9 MJ 181.5 MJ 201.5 MJ 221.5 23.8 36.2 27 22 1.2 15 23.8 37.1 28 24 1.2 16 25.8 38.9 30 27 1.2 18 10,5 10.4
13、10.2 30.94 37.17 50.09 MJ 301.5 30.8 46.1 37 36 1.5 27 MJ 331.5 132,8149.1 40 I 41 I 1.5 I 30 MJ 361.5 34.8 52.1 43 46 1.5 34 MJ 391.5 36.4 53.9 45 50 1.5 36 MJ 241.5 MJ 271.5 T3) Mass &F 27.8 41.1 32 30 1.2 21 27.8 44.1 35 32 1.5 24 10.8 95.93 10.8 130.50 10.8 159.72 J- 10.6 177.37 I) DN = Diameter
14、 Nominal (outside diameter of the 2) According to IS0 585513 3) Only applicable when dim. a A of EN 3273 1s less than correspondino pfpe) the actual forging diameter. A mssmatch between these diameters is acceptable. 4) Across Flat 4 Designation Each elbow shall only be designated as in the followin
15、g example: ELBOW, 90 SWIVEL NUT EN3250-05 Number of EN standard I 05 = DN (see table) Note: between the description block and identity block 5 Marking If necessary the originator code I9005 may be introduced Each part shall be marked in the position shown in the figure in accordance with EN 2424, style A 6 Technical specification Parts supplied to this standard shall conform with the requirements of EN 3275 type II
