1、BRITISH STANDARD AEROSPACE SERIES Pipe coupling 37“, spherical, in heat resisting steel - Straight unions, threaded - Inch series The European Standard EN 4554:2003 has the status of a British Standard ICs 49.080 BS EN 4554:2003 British Sta nda rds NO COPYING WITHOUT BSI PERMISSION EXCEPT As PERMITT
2、ED BY COPYRIGHT LAW BS EN 45549003 Amd. No. National foreword Date Comments This British Standard is the official English language version of EN 4554:2003. The UK participation in its preparation was entrusted to Technical Committee ACE69, Aerospace hydraulic systems, fluids and components, which ha
3、s the responsibility to: - - aid enquirers to understand the text; present to the responsible internationalEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them
4、in the UK. - A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “Int
5、ernational Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a
6、British Standard does not of itself confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Stratew Committee on Summary Of pages This document comprises a front cover, an inside front cover, the EN title page, 11 March 2003 pages 2
7、 to 7 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. O BSI 11 March 2003 ISBN O 580 41401 9 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4554 February 2003 ICs 49.080 English version Aerospace series - Pipe coupling 37O, spher
8、ical, in heat resisting steel - Straight unions, threaded - Inch series Srie arospatiale - Systme de raccordement sphrique 37“, en acier rsistant chaud - Mamelons droits implanter - Srie inch This European Standard was approved by CEN on 14 September 2002. CEN members are bound to comply with the CE
9、NKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to an
10、y CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN
11、 members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovak Republic, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDA
12、RDIZATION EUROPISCHES KOMITEE FUR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2003 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4554:2003 E EN 4554:2003 (E) Contents Foreword 3
13、 1 2 Normative references 3 3.1 Configuration - Dimensions -Tolerances - Masses . 4 3.2 Materials 4 4 Designation . 7 Scope 3 3 Required characteristics . 4 5 Marking . 7 6 Technical specification . 7 2 EN 4554:2003 (E) Foreword This document EN 4554:2003 has been prepared by the European Associatio
14、n of Aerospace Manufacturers (AECMA). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This Europe
15、an Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2003, and conflicting national standards shall be withdrawn at the latest by August 2003. According to the CENKENELEC Internal Regulations, the national
16、 standards organizations of the following countries are bound to implement this European Standard : Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovak Republic, Spain, Sweden, Switzer
17、land and United Kingdom. 1 Scope This standard specifies the characteristics of straight unions for inch series pipe couplings, 37“, spherical, in heat resisting steel, for aerospace applications. Connect with fluid system component with port connection in accordance with EN 4550-3. Nominal pressure
18、 : Class D in accordance with IS0 6771 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated referen
19、ces, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). IS0 31 61 Aerospace - UNJ threads -
20、General requirements and limit dimensions. IS0 6771 Aerospace - Fluid systems and components - Pressure and temperature classifications. EN 2424 Aerospace series - Marking of aerospace products. EN 3468 Aerospace series - Steel FE-PA13 - Softened - 500 5 R, 5 700 MPa - Forgings - De 5 100 mm EN 3487
21、 Aerospace series - Steel FE-PA13 - Softened - 500 I R, I 700 MPa - Bars for machining - De I 100 mm I). 1) Published as AECMA Prestandard at the date of publication of this standard 3 EN 4554:2003 (E) Code N Y EN 4550-1 Aerospace series - Pipe couplings, 374 spherical - Design configuration - Inch
22、series - Part I: Male sealing ends. Aerospace series - Pipe couplings, 37“ - Design configuration - Inch series - Part 2 : Port ends. Aerospace series - Pipe couplings, 37“ - Design configuration - Inch series - Part 3 : Port connections. Aerospace series - Pipe couplings, 374 spherical, up to 21 O0
23、0 kPa - Inch series - Technical specification. EN 4550-2 EN 4550-3 EN 4560 Locking wire hole option without locking wire hole with 2 locking wire holes 3 Required characteristics 3.2 Materials EN 3468 with minimum hardness HB 140 or EN 3487 with minimum hardness HB 140 4 EN 4554:2003 (E) D Q 6 3 - +
24、o, 25 Izl t 3 positions /5 I 1 See EN 4550-1 2 3 3 D view 4 Thread 5 Marking 6 (OE per EN 4550-1) Threads surface will be achieved by normal methods of manufacture Figure 1 5 EN 4554:2003 (E) A Dimensional code a B A03 BO3 A04 +0,05 -0,25 BO4 A05 min. BO5 A06 15,90 17,50 19,05 20,65 25,40 28,60 35,O
25、O 41,40 BO6 A08 17,63 19,46 21,26 22,88 28,48 32,06 39,30 46,56 BO8 Al O BI O Al 2 BI2 Al 6 ,437 5-20UNJF-3A ,500 0-20UNJF-3A Nominal diameter 4,763 EN4550-2-04 16,70 EN4550-1-04 EN4550-2-05 16,75 EN4550-1-05 6,350 7,924 ,562 5-18UNJF-3A ,750 0-16UNJF-3A 9,525 12,700 EN4550-2-06 18,20 EN4550-1-06 EN
26、4550-2-08 22,OO EN4550-1-08 15,875 19,050 ,875 0-14UNJF-3A 1.062 5-12UNJ-3A 25,400 EN4550-2-10 24,60 EN4550-1-1 O EN4550-2-12 27,OO EN4550-1-12 BI 6 1.312 5-12UNJ-3A Thread EN4550-2-16 28,OO EN4550-1-16 12 16 f 0,25 19,050 16,75 1,65 1,90 25,400 20,05 1,65 1,90 D Quoted in inches in accordance with
27、IS0 3161 b EIJ Mass = quoted in kgl 1 O00 parts 14,30 18,OO 23,OO 29,70 60,33 80,70 126,OO 167,OO Table 3 6 EN 4554:2003 (E) Description block UNION, STRAIGHT 4 Designation EXAMPLE : Identity block EN4554-fl N 5 Marking According to EN 2424, style A and Figure 1. 6 Technical specification According
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