1、STD*AECflA PREN 32bb-ENGL 1795 W LOL23LL 00LL7b2 5Tb W Edition approved for publication 1995-03-31 AECMA STANDARD NORME AECMA AECMA NORM C4 Chairman M. Staib Comments should be sent within six months after the date of publication to AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-
2、Moulineaux Cedex - FRANCE prEN 3266 Edition P 2 March 1995 EDIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : ENGLISH VERSION Aerospace series Pipe coupling in titanium a
3、lloy Bulkhead nuts Srie arospatiale Raccordement en alliage de titane crous, pour traverse de cloison Supersedes Issue P1 January 1990 Luft- und Raumfahrt Rohrverschraubung aus Titanlegierung Muttern fr Schottanschlu This “Aerospace Series“ Prestandard has been drawn up under the responsibility of A
4、ECMA (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 folio wing comment by the Member countries. Subsequent to the publication of this
5、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 the Official Services o
6、f the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Page 2 prEN 3266 Contents list 1 Scope 2 Normative references 3 Required characteristics 4 Designation 5 Marking 6 Technical specification STD*AECMA PREN 32bb-ENG
7、L 1775 W LOL23LL 00LL7b4 377 W Page 3 prEN 3266 1 Scope This standard specifies the characteristics of bulkhead nuts of the 830 pipe coupling system in titanium alloy intended for use in aircraft fluid systems. 2 Normative references This standard incorporates by dated or undated reference, provisio
8、ns from other publications. These normative 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
9、or revision. For undated references the latest 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 fi
10、lm lubricants - Coating methods2) EN 3314 Aerospace series - Titanium alloy TLP64001 - Solution treated and aged - Bar for machi- ning - 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
11、 preparation at the date of publication of this standard 3, Published as AECMA Prestandard at the date of publication of this standard 4, Published by: Department of Defense (DOD), the Pentagon, Washington, D. C. 20301. STD-AECMA PREN 32bb-ENGL 1995 LO123LL OOLLSb5 205 Page 4 prEN 3266 3 Required ch
12、aracteristics 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 values shown in figure 1 and table 1, prior to application of dry film lubricant. 3.2 Surface roughness See figure 1.
13、 3.3 Material See EN 3314. 3.4 Surface treatment Lubrication: see EN 2491, on threads and sealing faces. NOTE: Until 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 k
14、Pa max. for a time to give a clean surface and then rinsed in clean cold water. Lubrication shall be applied within 3 h. 67 (37) Break ai i sharp edges 0.1 to 0.0 Mark i ng Figure 1 : Configuration STD-AECMA PREN 32bb-ENGL 1995 10123LL OL19bb 141 W DN) 05 06 08 10 12 14 16 18 20 22 25 28 32 Page 5 p
15、rEN 3266 Thread) E M S Mass 49 6g min. h14 hl 3 max. MJ lox 1 15,51 5 14 2,34 MJ 12 x 1.25 18.90 6 17 4,lO MJ 14x 1.5 21,lO 7 19 4.80 MJ 16 x 1,5 24,49 8 22 8,69 MJ 18 x 1,5 26,75 8,5 24 10,34 MJ 20 x 1,5 30,14 8,5 27 13,19 MJ 22 x 1,5 33,53 8.5 30 16,64 MJ 24 x 1,5 35,72 8.5 32 17.81 MJ 27 x 1,5 37
16、72 8.5 34 18,03 MJ 30 x 1,5 39,98 85 36 18.04 MJ 33 x 1,5 45,63 83 41 25,22 MJ 36 x 1,5 51,28 10,o 46 40.39 MJ 39 x 1,5 55,80 10,o 50 47,60 gipiece 4 Designation EXAMPLE : Description block Identity block I EN3266-05 T 1 BULKHEAD NUT Number of this standard DN (see table 1) I NOTE: If necessary, th
17、e code 19005 shall be placed between the description block and the identity block, 5 Marking Each part shall be marked in the position shown in figure 1 in accordance with EN 2424, style A. 6 Technical specification Parts supplied to this standard shall be checked for conformity with this standard in respect of: - material and surface treatment - dimensional parameters - marking for the first batch from a manufacturer 1 O0 %; for subsequent batches for major nonconformance at 1,5 AQL and for minor nonconformance at 2.5 AQL
