1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4551 Edition P 2 December 2012 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.orgICS: 49.080 Supersedes edi
2、tion P 1 of September 2000 and will supersede EN 4551:2003Descriptors: ENGLISH VERSION Aerospace series Pipe coupling 37, in heat resisting steel Swivel nuts Inch series Srie arospatiale Systme de raccordement 37, en acier rsistant chaud crous prisonniers Srie inch Luft- und Raumfahrt Rohrverschraub
3、ung 37, aus hochwarmfestem Stahl berwurfmuttern Inch-Reihe This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It h
4、as been technically approved by the experts of the concerned Domain following member comments. 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
5、standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implemen
6、t the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 1 December 2012 Comments should be sent within six months after the date of publication to ASD-STAN Mechanical Domain Copy
7、right 2012 by ASD-STAN prEN 4551:2012 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Required characteristics .3 3.1 Configuration Dimensions Tolerances Masses .3 3.2 Materials .4 3.3 Surface treatments 4 4 Designation 6 5 Designation 6 6 Technical specification .6 Annex A (info
8、rmative) Standard evolution form 7 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Mechanical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval f
9、or Publication. prEN 4551:2012 (E) 3 1 Scope This standard specifies the characteristics of swivel nuts for inch series pipe couplings, 37, in heat resisting steel, for aerospace applications. Nominal pressure: Class D in accordance with ISO 6771. 2 Normative references The following referenced docu
10、ments are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3161, Aerospace UNJ threads General requirements and limit dimensions ISO
11、6771, Aerospace Fluid systems and components Pressure and temperature classifications EN 2424, Aerospace series Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 2786, Aerospace series Electrolytic silver plating of fasteners EN 3468, Aer
12、ospace series Steel FE-PA13 Softened 500 Rm 700 MPa Forgings De 100 mm 1)EN 3487, Aerospace series Steel FE-PA3601 (X6CrNiTi18-10) Air melted Softened Bar for machining a or D 250 mm 500 MPa Rm 700 MPa EN 4560, Aerospace series Pipe coupling, 37, spherical, up to 21 000 kPa Inch series Technical spe
13、cification 3 Required characteristics 3.1 Configuration Dimensions Tolerances Masses See Figure 1 and Tables 1 to 4. Dimensions and tolerances are in millimetres. They apply before lubrication except for silver plating parts. Table 1 Code Locking wire hole option N without locking wire hole Y with 2
14、 locking wire holes 1) Published as ASD-STAN Prestandard at the date of publication of this standard (www.asd-stan.org).prEN 4551:2012 (E) 4 3.2 Materials EN 3468 with minimum hardness HB 140 or EN 3487 with minimum hardness HB 140. 3.3 Surface treatments Table 2 Code Surface treatment Specification
15、 A None B Molybdenum disulphide coating EN 2491 C Silver plating EN 2786 Threads surface will be achieved by normal methods of manufacture. Key 1 R 0,13 to R 0,25 2 Pitch diameter 3 Thread 4 R 0,13 to R 1,80 5 Three positions 6 Marking Figure 1 0,3 0,1 Ra3,2 Ra1,6 prEN 4551:2012 (E) 5 Table 3 Dimens
16、ional code aNominal diameter Thread bA B C D E F G H J K L M Mass quoted inkg/1 000parts 0,1 0 0,250 0,50 0,05 0,25min. 0,4 min. max. 0,250 03 04,763 0375 0-24UNJF-3B 06,15 10,1010,8512,30 12,45 12,7008,5508,7507,00 09,90 14,25 10,20 13,9015,6516,2009,95 04 06,350 0437 5-20UNJF-3B 07,75 10,4511,2513
17、,85 14,00 14,3009,9510,1507,45 11,50 16,00 11,20 14,2516,0516,5511,00 05 07,924 0500 0-20UNJF-3B 09,50 10,8011,5515,50 15,60 15,9011,5511,7508,45 13,10 17,90 12,20 15,3517,3017,8012,50 06 09,525 0562 5-18UNJF-3B 11,15 11,5012,2517,10 17,20 17,5013,0013,2009,30 14,70 19,70 12,70 16,0518,7519,0016,30
18、08 12,700 0750 0-16UNJF-3B 14,45 12,1512,9021,85 22,00 22,2517,6017,8009,75 19,45 25,10 14,45 18,2520,8021,3026,50 10 15,875 0875 0-14UNJF-3B 17,70 15,3016,0525,00 25,15 25,4020,5520,80011,50 22,60 28,70 16,94 20,6023,3023,8033,50 12 19,050 1.062 5-12UNJ-3B0 21,20 14,5515,3029,85 31,50 31,8025,0025,
19、2512,40 27,40 35,90 18,75 21,9024,3524,8556,70 16 25,400 1.312 5-12UNJ-3B0 27,65 16,2016,9536,30 37,85 38,2031,3531,6013,60 33,70 43,20 19,95 24,3026,7027,2575,40 aThis code corresponds to the nominal diameter given in 16thof inches within two digits. bQuoted in inches in accordance with ISO 3161. T
20、able 4 (When locking wire hole option code is “Y”) Dimensional code aNominal diameter N P S 0,25 03 04,763 05,3 05,6 1,45 1,55 2,55 04 06,350 06,2 06,5 1,45 1,55 2,55 05 07,924 07,1 07,4 1,65 1,90 2,55 06 09,525 07,9 08,1 1,65 1,90 2,55 08 12,700 10,2 10,6 1,65 1,90 3,55 10 15,875 11,8 12,3 1,65 1,9
21、0 3,55 12 19,050 14,7 15,2 1,65 1,90 3,55 16 25,400 18,2 18,6 1,65 1,90 3,55 aThis code corresponds to the nominal diameter given in 16thof inches within two digits. prEN 4551:2012 (E) 6 4 Designation EXAMPLE Description block SWIVEL NUT Identity block EN4551-10BN Number of this standard Dimensional
22、 code (see Tables 3 and 4) Surface treatment code (see Table 2) Locking wire hole option code (see Table 1) NOTE If necessary, the code I9005 shall be placed between the description block and the identity block. 5 Designation According to EN 2424, style A and Figure 1. 6 Technical specification Acco
23、rding to EN 4560. prEN 4551:2012 (E) 7 Annex A (informative) Standard evolution form MODIFICATION REASON AND VALIDATION Table 3 Before: Dimensions for code 10 D was 23,55 F was 19,15 to 19,40 G was 9,75 J was 26,90 K was 14,45 M was 20,80 to 21,30 After: Dimension for code 10 D is 25,15 F is 20,55 to 20,80 G is 11,50 J is 28,70 K is 16,94 M is 23,30 to 23,80 Values totally incoherent for code 10. Accordance with standard MS9197.
