1、f- f f = LO12311 00036811 5 Edition approved for publication 2 November 1987 O O O Comments should be sent within six months C4 Chairman after the date of publication decision 88, Bd. Malesherbes A.E.C.M.A. Mr CTAIB 75008 PARIS - FRANCE A. E. C. M. A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN
2、2604 Issue P 1 November 1987 DITE PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes, 75008 PARIS - TL. 45-63-82-85 UDC : 621.643.06 : 629.7 Key words : Aircraft industry - Straight metric-size unions - interface - Dimensions ENGLISH VERSION Aerospace series
3、 Straight metric-size unions with locking ring 8O 30 union interface Dimensions Srie arospatiale Raccords droits mtriques avec bague de scurit Interface des raccords 8O 30 Dimensions Luft- und Raumfahrt Gerade metrische Verschraubung mit Sicherungsring 8O 30 Anschluzapfen Abmessungen This Aerospace
4、Series pre-standard 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 AECMA Commission following comment
5、by the Member countries. Subsequent to the publication of this pre-standard, the technical content shal! 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 Check
6、ing 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 final vote. Nota - Exfra copies can be supplied by B.N.A,E. - 8, rue Moreau-Vauthier -92100 BOULOGNE-BILLANCOUR
7、T aecma 1987 I Issue P 1 prEN 2604 Page 3 AECMA PREN260q 87 1iOL23LL 0003b8b- 9 m- 0 1 Scope and field of application This standard specifies the dimensional characteristics of the nut end of 8301 straight metric-size unions and locking ring assembly with elastomer O-rings for use on aerospace equip
8、ment. This standard applies to all straight metric-size unions with locking ring assembled to standard EN 2607 - and used in hydraulic systems with a maximum pressure of 28000 kPa for which the principle of a metric-size “DYNAMIC BEAM SEAL“ coupling with a 8O30 conical sealing surface has been selec
9、ted. 2 References IS0 1101 - Technical drawings - Geometrical tolerancing - Tolerancing of form, orientation, location and run-out - Generalities, definitions, symbols, indications on drawings IS0 1302 -Technical drawinqs - Method of indicating surface texture on e drawings IS0 585511 - Aerospace co
10、nstruction - MJ Threads - Part 1 - Basic profile IS0 585513 -Aerospace - MJ Threads - Part 3 - Dimensions for fittings for -Aerospace series - Straight metric-size unions with locking ring - fluid systems 1) Port end - Dimensions EN 2603 EN 2607 -Aerospace series - Straight metric-size unions with l
11、ocking ring - Configuration - O-ring dimensions EN 2645 -Aerospace series - Straight metric-size unions with locking ring - Locking ring - Dimensions 1) in preparation. i- Previous page is blank I AECMA PREN2b04 87 = LOL23LL O003687 O issue P 1 prEN 2604 Page 4 (1) Locking ring installed 3 Required
12、characteristics Li1 (1) 3.1 Dimensions 02IT02 3 45“ -+ 5 for dimensional check, see EN 2645 (31 When 02 is less than or equal to D9, port dia D9 shall be the same over the whole union length and LI0 and dia D2 values shall be disregarded. Thread Figure Table nomi- tole- nomi- nal I rance! nal 45“ 2
13、5 Dimensions in miilimetres compliance with IS0 585511 and 3 1. AECMA PREN2604 87 U lOL23LL 0003688 2 * Issue P 1 prEN 2604 Page 5 ri 3.2 Surface roughness See 1302. Unless otherwise specified 3.3 Form and position tolerances See IS0 1101. 4 Designation Each nut end shall only be designated as in the following example : EN2i - Number of EN standard Description block NUT END I dent it y block 144 - Dimensional code (see table ) 7 - Note : if necessary the originator code S9005 may be introduced between description block and identity block.
