1、STDmAECMA PREN 32ib-ENGL 1995 = LO123LL 00117Lib 353 Edition approved for publication 1995-03-31 AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months after the date of publication to AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRAN
2、CE prEN 3246 Edition P 2 March 1995 - DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AEROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Supersedes Issue P1 December 1989 Descriptors : Srie arospatiale Raccordement 8O
3、30 en alliage de titane Raccords droits traverse de cloison ENGLISH VERSION Aerospace series Pipe coupling 8O 30 in titanium alloy Unions, bulkhead Luft- und Raumfahrt Rohrverschraubung 8O 30 aus Titanlegierung Gerade Schott-Verschraubungen This “Aerospace Series“ Prestandard has been drawn up under
4、 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 Technical Committee following comment by the Member countries. Subsequent to t
5、he 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 and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of
6、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. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX C4 Cha
7、irman M. Staib CJ aecma 1995 STD*AECMA PREN 32Yb-ENGL 1775 LO123LL 001L797 27T Page 2 prEN 3246 Contents list 1 Scope 2 Normative references 3 Required characteristics 4 Designation 5 Marking 6 Technical specification Page 3 prEN 3246 1 Scope This standard specifies the characteristics of bulkhead u
8、nions of the 830 pipe coupling system in titanium alloy intended for use in aircraft fluid systems. Nominal pressure: up 28 O00 kPa Temperature range: -55 C to 135 “C 2 Normative references This standard incorporates by dated or undated reference, provisions from other publications. These normative
9、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 standard only when incorporated in it by amendment or revision. For undated references the late
10、st edition of the publication referred to applies. IS0 5855-3 Aerospace - MJ threads - Part 3: Limit dimensions for fittings for fluid systems EN 2424 Aerospace series - Marking of aerospace products) EN 2491 Aerospace series - Molybdenum disulphide dry film lubricants - Coating methods2) EN 3274 Ae
11、rospace series - Pipe coupling 8“ 30 - Thread end - Geometric configuration3) EN 3275 Aerospace series - Pipe coupling 8 30 - Dynamic beam seal up to 28 O00 kPa - Metric series - Technical specification3) EN 3314 Aerospace series - Titanium alloy TLP64001 - Solution treated and aged - Bar for machin
12、ing - D 5 75 mm3) MIL-L-4601 OB Lubricant, solid film, heat cured, corrosion inhibiting4) 1 Published as AECMA Standard at the date of publication of this standard 2, In preparation at the date of publication of this standard 3, Published as AECMA Prestandard at the date of publication of this stand
13、ard 4, Published by: Department of Defense (DOD), the Pentagon, Washington, D.C. 20301. Page 4 prEN 3246 3 Required characteristics 3.1 Configuration - Dimensions - Tolerances See figure 1 and table 1. Dimensions and tolerances are in millimetres. The dimensions and tolerances shall conform with the
14、 values shown in figure 1 and table 1, prior to application of dry film lubricant. 3.2 Surface roughness See figure I, unless other values of referenced design standards are specified. 3.3 Material See EN 331 4. 3.4 Surface treatment Lubrication: see EN 2491, on threads and sealing faces. NOTE: Unti
15、l EN 2491 is published, the lubricant may be applied using MIL-L-46010B. Abrasive blasting shall be carried out using aluminium oxide within the grade 90-220 mesh at a pressure of 480 kPa max. for a time to give a clean surface and then rinsed in clean cold water. Lubrication shall be applied within
16、 3 h. y Break ai i sharp edges O. 1 to 0.4 Mark i ng installation: Gripiength: 3 5 max. Dry - lubrication - r- lubrication O + wi th hexagon per Thread end Thread end (without hexagon) per EN 3274 form 3 EN 3274 form E I- Figure 1 : Configuration STD-AECMA PREN 324b-ENGI- 1795 E 1OLZ31L 0011950 884
17、Table 1 : Dimensions, tolerances and mass DN) glpiece Thread2) F3) L S Mass 49 6g f 0,2 hl 3 max. 05 MJ10xl 29,6 14,l 14 10,31 06 MJ 12 x 1,25 34,O 16,O 17 16,53 08 MJ 14 x 1,5 39,6 18,6 19 23,31 10 MJ 16 x 1,5 40.6 18,6 22 29,49 12 MJ 18 x 1,5 42,6 19.6 24 36,82 14 MJ 20 x 1,5 42,6 19,6 27 47,30 16
18、 MJ 22 x 1,5 42,6 19,6 30 59,23 20 MJ 27 x 1,5 42,6 19,6 34 70,33 22 MJ 30 x 1,5 42,6 19,6 36 78,28 25 MJ 33 x 1.5 42.6 19,6 41 102.47 28 MJ 36 x 1,5 45,l 20,6 46 126,88 32 MJ 39 x 1,5 45,l 20,6 50 145,OO 18 MJ 24 x 1,5 426 19.6 32 61 ,a7 1 DN Diameter Nominal (outside diameter of the corresponding
19、pipe) 2, According to IS0 5855-3 1 31 According to L and EN 3274 form E Page 5 prEN 3246 Description block Identity block 5 Marking Each part shall be marked in the position shown in figure I in accordance with EN 2424, style A. 6 Technical specification Parts supplied to this standard shall conform to the requirements of EN 3275 type II.
