1、STD-AECMA PREN 4550-2-ENGL 2000 lOL23LL 00LBb77 bL5 I I 0 aecma 2OC AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 2000-09-29 prEN 4550-2 Edition P 1 September 2000 Comments should be sent within six months after the date of publication to Gulledelle 94 C4 Chairman AECMA Mr S
2、taib B-1200 BRUXELLES PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (t32) 2 775 81 10 - Fax. (+32) 2 775 81 I1 ICs: 49.080 Descriptors: aircraft industry, hydraulic system, fluid circuit, pipe fitting, characteristic, dimension, dimensi
3、onal tolerance, designation ENGLISH VERSION Aerospace series Pipe coupling, 37“ Design configuration Inch series Part 2: Port ends Srie arospatiale Systme de raccordement 37“ Configuration gomtrique Srie inch Partie 2 : Extrmits implanter Luft- und Raumfahrt Rohrverschraubung 37“ Konstruktionsblatt
4、Inch-Reihe Teil 2: Einschraubenden 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 needs of AECMA- Members. It has been technically approved by the experts of the concer
5、ned 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, physically or functionally, without re-identification of the standard. After examination
6、and signature of the AECMA Standard 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 Committee for Standardization) for formal vote. STD.AECflA PREN 4550-2-ENGL 2000 II 1012311 00Lb7 551 = P
7、age 3 prEN 4550-2: 2000 i Scope This standard defines the dimensions and tolerances for the port end of inch series pipe couplings, 37“, for aerospace applications. Matched fluid system component shall have a port connection in accordance with EN 4550-3. 2 Normative references IS0 3161 Aerospace - U
8、NJ threads - General requirements and limit dimensions EN 4550-3 Aerospace series - Pipe couplings, 37“ - Design configuration - Inch series - Part 3: Port connections 1) 3 Dimensions - Tolerances See figure 1 and table 1, Dimensions and tolerances are in millimetres. -0.3 DETAIL v NOTE All outer su
9、rfaces shall be concentric with a tolerance of diameter 0,l mm relative to the inner diameter A. Figure 1 I) Published as AECMA Prestandard at the date of publication of this standard Previous page is blank Page 4 prEN 4550-2: 2000 08 10 Table I 9 75 12 15 12,700 .750 0-16UNJF-3A 11,15 15,875 .875 0
10、-14UNJF-3A 12:50 f 0,25 .375 0-24UNJF-3A 2,90 12 16 I 4: I 04 1 6,350 1 ,437 5-20UNJF-3A 1530 19,050 I .O62 5-1 2UNJ-3A 5,70 21,20 25,400 1.312 5-12UNJ-3A 21 ,70 . 12,20 _ 05 580 I 7,924 I .5000-20UNJF-3A I 6,10 I 10,15 I 7,35 I 06 I 9,525 I 562 5-18UNJF-3A 7,70 f 0,25 M + 0,25 O 7,80 24,OO 3,30 a This code corresponds to the nominal diameter given in 16th of inches within two digits. Quoted in inches in accordance with IS0 3161 4 Designation EXAMPLE: Identity block EN4550-2-08 Number of this standard Ti Dimensional code (see table 1)
