1、CEN PREN*4021 94 W 3404589 0062.565 913 AECMA STANDARD NORME AECMA AECMA NORM prEN 4021 Edition P 1 Avril 1994 DIT 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 : Descripto
2、rs : ENGLISH VERSION Aerospace series Pipe coupling 8O30 in titanium alloy Elbows 90, bulkhead Srie arospatiale Raccordement 8O 30 en alliage de titane Raccords couds a 90 pour traverse de cloison Luft- und Raumfahrt Rohrverschraubung 8 O 30 aus Titanlegierung Winkel-Schottverschraubungen 90 This “A
3、erospace Series Prestandard has been drawn up under 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 followi
4、ng comment by the Member countries. Subsequent to the 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 Stan
5、dard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Cornmittee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacque
6、s Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX I Comments should be sent within six months after the date of publication to Edition approved for publication 1994-04-29 AECMA Technopolis - 1 75, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE C 4 Chairman Mr. Staib I aecma 1994 prE
7、N 4021 CEN PREN*402L 94 m 3404589 00625bb 85T W Page 2 Contents list 1 Scope 2 Normative references 3 Required characteristics 4 Designation 5 Marking 6 Technical specification CEN PRENx4021 94 3404589 0062567 796 prEN 4021 Page 3 1 Scope This standard specifies the characteristics of elbows go, bul
8、khead, in titanium alloy intended for use in aircraft fluid system pipelines. Nominal pressure: up to 28 O00 kPa Temperature range: -55 C to 135 C 2 Normative references IS0 5855-3 EN 2424 EN 2491 EN 3274 EN 3275 EN 3314 EN 3315 MIL-L-46010B Aerospace - MJ threads - Part 3: Limit dimensions for fitt
9、ings for fluid systems Aerospace series - Marking of aerospace products I Aerospace series - Molybdenum disulphide dry film lubricants - Coating methods * Aerospace series - Pipe coupling 830 - Thread end - Geometric configuration 31 Aerospace series - Pipe coupling 8 30 - Dynamic beam seal up to 28
10、 O00 kPa - Metric series - Technical specification 3 Aerospace series - Titanium alloy TI-P63 - Solution treated and aged - R, 2 1070 MPa - Bar for machining - De s 50 mm 3, Aerospace series - Titanium alloy TI-P63 - Solution treated and aged - R, 1 1070 MPa - Forgings - De I 50 mm 31 Lubricant, sol
11、id film, heat cured, corrosion inhibiting 41 ) Published as AECMA Standard at the date of publication of this standard In preparation at the date of publication of this standard Published as AECMA Prestandard at the date of publication of this standard Published by: Department of Defense (DOD), the
12、Pentagon, Washington, D.C. 20301. 31 41 CEN PRENlw402L 94 m 3404589 0062568 622 m prEN 4021 Page 4 3 Required characteristics 3.1 Configuration - Dimensions - Tolerances The configuration shall be in accordance with figure 1. The dimensions and tolerances shall conform to the values shown in table 1
13、, prior to application of the dry film lubricant. The dimensions quoted are those required by the design to meet installation and system requirements. Dimensions and tolerances not quoted are at the manufacturers option subject to meeting the qualification and acceptance requirements of EN 3275. 3.2
14、 Surface roughness See figure 1, unless other values of referenced design standards are specified. 3.3 Material See EN 3314 or EN 3315. 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. Abra
15、sive 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 3 h. 6;/ Break all sharp edges 0.1 mm to 0.4 mm Washer Installation: Mark i
16、ng Dry I ubr i Cat i on lA*)!y30. Dry I ubr i cat i on Detai 1 X Corner to be removed by a process giving a radius of 0.3 mm to I, O mm and a surfece finish of 0.8 pm. (Hand deburring is not permitted) “) Also drill depth dimension Figure 1 : Configuration CEN PREN*4021i 94 3404587 00b25b9 569 prEN
17、4021 Page 5 Table 1: Dimensions, tolerances and mass Dimensions in millimetres 1) DN Diameter Nominal (outside diameter of the corresponding pipe) 2) According to IS0 5855-3 3) Across flats 4 Designation EXAMPLE: Description block ELBOW go, BULKHEAD Identity block Number of this standard DN (see tab
18、le11 NOTE: If necessary, the 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 conform to the requirements of EN 3275, type II.
