1、STD.AECMA PREN Y553-ENGL 2000 m LOL23LL 00Lb5 b3U AECMA STANDARD prEN 4553 NORME AECMA Edition P 1 AECMA NORM September 2000 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 Edition approved for p
2、ublication Comments should be sent within six months after the date of publication to 2000-09-29 AECMA Mr Staib Gulledelle 94 C4 Chairman 8-1200 BRUXELLES 0 aecma 20( ICs: 49.080 Descriptors: aircraft industry, hydraulic system, fluid circuit, pipe fitting, heat resistant steel, characteristic, dime
3、nsion, dimensional tolerance, designation ENGLISH VERSION Aerospace series Pipe coupling, 37“, spherical, in heat resisting steel Elbow 90“ nipples, welded Inch series Srie arospatiale Luft- und Raumfahrt Systme de raccordement sphrique 37“, en acier rsistant chaud Mamelons couds 90“ souder Rohrvers
4、chraubung mit Kugelbuchsen 37“, aus hochwarmfestem Stahl Winkelverschraubungen, go“, zum Anschweien Srie inch Inch-Reihe This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the
5、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 the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, phy
6、sically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Oficial Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standa
7、rdization) for formal vote. Nota - Extra cnpies can be supplied by B.N.A.E. - Technoplis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX STD-AECMA PREN 4553-ENGL 2000 W LOL23LL 00L8b7b 577 Page 3 prEN 4553: 2000 I Scope This standard specifies the characteristics of welded elbo
8、w 90“ nipples for inch series pipe couplings, 37“, spherical, in heat resisting steel, for aerospace applications. Nominal pressure: Class D in accordance with IS0 6771 2 Norm at ive references IS0 3161 IS0 6771 EN 2424 EN 3363 EN 3468 EN 3487 EN 4549 EN 4550-1 EN 4560 Aerospace - UNJ threads - Gene
9、ral reqL, ements and limit dimensions Aerospace - Fluid systems and components - Pressure and temperature classifications Aerospace series - Marking of aerospace products Aerospace series - Steel FE-CM38 - Solution treated - Rm 2485 MPa - Sands or investment casting 1) Aerospace series - Steel FE-PA
10、1 3 - Softened - 500 140 or EN 3468 with minimum hardness HB 140 or EN 3487 with minimum hardness HB 140 Previous page is blank 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 4553: 2000 -0.3 Threads surface will be achieved by normal methods of manufacture.
11、 t E per NOTE Geometrical tolerances given in figure 2 are applicable to molding or forging parts. Figure I - Shape for molding or forging parts 3 O VIEW N th 8: 0,889 mm); - nominal diameter given in 16th of inches within two digits. Quoted in inches in accordance with IS0 3161 Mass = quoted in kgl
12、 O00 parts a This code corresponds to: - tube wall thickness (A: 0,71 I rnm; B: 0,889 mm); I - nominal diameter given in 16th of inches within two digits. 4 Designation EXAMPLE : Description block Identity block NIPPLE, ELBOW 90“ Number of this standard Dimensional code (see tables 1 to 2) NOTE If necessary, the code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style A, as indicated on figures 1 and 2. 6 Technical specification According to EN 4560
