1、BSI Standards PublicationBS EN 4551:2014Aerospace series Pipecoupling, 37, in heat resistingsteel Swivel nuts InchseriesIncorporating corrigendum November 2015BS EN 4551:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 4551:2014. It supersedes BS EN 4551:200
2、3 which is withdrawn.BSI as a member of CEN is obliged to publish EN 4551:2014 as a Brit-ish Standard. However, attention is drawn to the fact that during the development of this European Standard, the UK committee voted against its approval as a European Standard. The reason for this disapproval is
3、 that the UK committee considers the standard to describe an item for an interface that does not perform reliably in high pressure Aerospace applications. As a result it has not been used in a new design for some 30 years. The UK participation in its preparation was entrusted to Technical Committee
4、ACE/69, Aerospace hydraulic systems, fluids and com-ponents.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Th
5、e British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 92365 4ICS 49.080Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 Oc
6、tober 2014.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e d30 November 2015 Implementation of CEN correction notice 26November 2014 and 17 December 2014: Figure 1 corrected and header correctedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4551 October 2014 ICS 49.080
7、 Supersedes EN 4551:2003English 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 - Rohrverschraubung 37, aus hochwarmfestem Stahl
8、 - berwurfmuttern - Inch-Reihe This European Standard was approved by CEN on 4 January 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date
9、 lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation u
10、nder the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Forme
11、r Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT E
12、UROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4551:2014 EEN 4551:2014 (E) 2 Contents Page Foreword 3 1 S
13、cope 4 2 Normative references 4 3 Required characteristics .4 3.1 Configuration Dimensions Tolerances Masses .4 3.2 Materials .5 3.3 Surface treatments 5 4 Designation 7 5 Marking .7 6 Technical specification .7 Annex A (informative) Standard evolution form .8 BS EN 4551:2014EN 4551:2014 (E) 3 Forew
14、ord This document (EN 4551:2014) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations
15、and the Official Services of the member countries of ASD, prior to its presentation to CEN. This document supersedes EN 4551:2003. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2015, and c
16、onflicting national standards shall be withdrawn at the latest by April 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. Accordin
17、g to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Gr
18、eece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 4551:2014EN 4551:2014 (E) 4 1 Scope This European Standard specifies the characteristics
19、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 documents, in whole or in part, are normatively referenced in this document and are indispensable for it
20、s application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2424, Aerospace series Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coatin
21、g methods EN 2786, Aerospace series Electrolytic silver plating of fasteners EN 3468, Aerospace 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,
22、Aerospace series Pipe coupling, 37, spherical, up to 21 000 kPa Inch series Technical specification ISO 3161, Aerospace UNJ threads General requirements and limit dimensions ISO 6771, Aerospace Fluid systems and components Pressure and temperature classifications 3 Required characteristics 3.1 Confi
23、guration Dimensions Tolerances Masses See Figure 1 and Table 1 to Table 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 locking wire holes 1)Published as ASD-STA
24、N Prestandard at the date of publication of this standard (www.asd-stan.org).BS EN 4551:2014EN 4551:2014 (E) 5 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 Standard A None B Molybdenum disulphide coa
25、ting 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 BS EN 4551:2014EN 4551:2014 (E) 6 Table 3 Dimensional code aNominal di
26、ameter Thread bA B C D E F G H J K L M Mass quoted in kg/1 000 parts + 0,1 0 + 0,25 0 + 0,5 0 + 0,05 0,25 min. 0,4 min. max. + 0,25 0 03 04,763 0375 0-24UNJF-3B 06,15 10,10 10,85 12,30 12,45 12,70 08,55 08,75 07,00 09,90 14,25 10,20 13,90 15,65 16,20 09,95 04 06,350 0437 5-20UNJF-3B 07,75 10,45 11,2
27、5 13,85 14,00 14,30 09,95 10,15 07,45 11,50 16,00 11,20 14,25 16,05 16,55 11,00 05 07,924 0500 0-20UNJF-3B 09,50 10,80 11,55 15,50 15,60 15,90 11,55 11,75 08,45 13,10 17,90 12,20 15,35 17,30 17,80 12,50 06 09,525 0562 5-18UNJF-3B 11,15 11,50 12,25 17,10 17,20 17,50 13,00 13,20 09,30 14,70 19,70 12,7
28、0 16,05 18,75 19,00 16,30 08 12,700 0750 0-16UNJF-3B 14,45 12,15 12,90 21,85 22,00 22,25 17,60 17,80 09,75 19,45 25,10 14,45 18,25 20,80 21,30 26,50 10 15,875 0875 0-14UNJF-3B 17,70 15,30 16,05 25,00 25,15 25,40 20,55 20,80 011,50 22,60 28,70 16,94 20,60 23,30 23,80 33,50 12 19,050 1.062 5-12UNJ-3B0
29、 21,20 14,55 15,30 29,85 31,50 31,80 25,00 25,25 12,40 27,40 35,90 18,75 21,90 24,35 24,85 56,70 16 25,400 1.312 5-12UNJ-3B0 27,65 16,20 16,95 36,30 37,85 38,20 31,35 31,60 13,60 33,70 43,20 19,95 24,30 26,70 27,25 75,40 aThis code corresponds to the nominal diameter given in 16thof inches within tw
30、o digits. bQuoted in inches in accordance with ISO 3161. Table 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
31、,700 10,2 10,6 1,65 1,90 3,55 10 15,875 11,8 12,3 1,65 1,90 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. BS EN 4551:2014EN 4551:2014 (E) 7 4 Designation EXAMPLE Description block SW
32、IVEL NUT Identity block EN 4551-10BN Number of this standard Dimensional code (see Table 3 and Table 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 Marking A
33、ccording to EN 2424, style A and Figure 1. 6 Technical specification According to EN 4560. BS EN 4551:2014EN 4551:2014 (E) 8 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
34、 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. BS EN 4551:2014This page deliberately left blankBSI is the national body responsi
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