1、BRITISH STANDARD AEROSPACE SERIES BS EN 4054:2004 Pipe couplings, loose flanges and seals Seals in fluorocarbon rubber and armature in aluminium alloy Technical specification The European Standard EN 4054:2004 has the status of a British Standard ICS 49.080 BS EN 4054:2004 This British Standard was
2、published under the authority of the Standards Policy and Strategy Committee on 16 December 2004 BSI 16 December 2004 ISBN 0 580 45107 0 National foreword This British Standard is the official English language version of EN 4054:2004. It supersedes BS EN 4054:2003 which is withdrawn. The UK particip
3、ation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement
4、international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not
5、 purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European com
6、mittee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to
7、 12, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4054 November 2004 ICS 49.080 Supersedes EN 405
8、4:2003 English version Aerospace series - Pipe couplings, loose flanges and seals - Seals in fluorocarbon rubber and armature in aluminium alloy - Technical specification Srie arospatiale - Raccords, brides amovibles et joints - Joints en lastomre fluorocarbone et armature en alliage daluminium - Sp
9、cification technique Luft- und Raumfahrt - Rohrverbindungen mit losen Flanschen und Flachdichtungen - Dichtungen aus Fluorcarbon-Elastomer mit Aluminiumarmierung - Technische Lieferbedingungen This European Standard was approved by CEN on 11 September 2003. CEN members are bound to comply with the C
10、EN/CENELEC 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 Central Secretariat or t
11、o any 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 Central Secretariat has the same status as the official version
12、s. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerl
13、and and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. E
14、N 4054:2004: EEN 4054:2004 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Quality assurance5 5 Requirements.6 6 Packaging.9 7 Marking .9 8 Storage10 Annex A (normative) Ageing and pressurizing tests.11 Annex B (normative) Resistance to fluids 12 EN 4054
15、:2004 (E) 3 Foreword This document (EN 4054:2004) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National A
16、ssociations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. 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 May 2005, and conflicting national standar
17、ds shall be withdrawn at the latest by May 2005. This document supersedes EN 4054:2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,
18、 Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 4054:2004 (E) 4 1 Scope This standard specifies the characteristics, qu
19、alification and acceptance requirements for seals for flanged pipe couplings in fluorocarbon rubber with an armature in aluminium alloy, for aerospace applications. It is applicable whenever referenced. 2 Normative references The following referenced documents are indispensable for the application o
20、f 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 1817, Rubber, vulcanized Determination of the effect of liquids ISO 2859-1, Sampling procedures and tables for inspecti
21、on by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection EN 2751, Aerospace series Storage conditions for rubber products Requirements for storage, cleaning and maintenance 1)EN 2798, Aerospace series Fluorocarbon rubber (FPM) Low compression set
22、Hardness 80 IRHD 2)EN 3376, Aerospace series Limits of surface imperfections of elastomeric toroidal sealing rings (o-rings) 2) EN 9133, Aerospace series Quality management systems Qualification Procedure for Aerospace Standard Parts 2)3 Terms and definitions For the purposes of this standard, the f
23、ollowing terms and definitions apply. 3.1 production batch quantity of finished seals manufactured from the same batch of compound moulded onto the armature. The product standard of the material defining the armature shall be the same for the compound batch. 3.2 compound a homogeneous mixture of pol
24、ymers or polymers with all ingredients required for the finished product 1) In preparation at the date of publication of this standard 2) Published as AECMA Prestandard at the date of publication of this standard EN 4054:2004 (E) 5 3.3 Surface discontinuites 3.3.1 crack rupture in the material which
25、 may extend in any direction and which may be intercrystalline or transcrystalline in character 3.3.2 seam open surface defect 3.4 simple random sampling the taking of n items from a population of N items in such a way that all possible combinations of n items have the same probability of being chos
26、en 3.5 sampling plan a plan according to which one or more samples are taken in order to obtain information and possibly to reach a decision 3.6 limiting quality (LQ 10 ) in a sampling plan, the quality limit which corresponds to a specified 10 % probability of acceptance 3.7 acceptance quality limi
27、t (AQL) a quality limit which in a sampling plan corresponds to a specified but relatively high probability of acceptance It is the maximum per cent defective (or the maximum number of defects per hundred units) that, for purposes of sampling inspection can be considered satisfactory as a process av
28、erage. 3.8 definition document document specifying all the requirements for finished parts 4 Quality assurance 4.1 Qualification EN 9133 Qualification, inspections and tests shall be carried out on five seals of each size, except for opposed indication specified in Table 1. The test programme may po
29、ssibly be reduced. Any such decision shall be based on the results obtained on similar types of seals provided that the design and manufacturing conditions are identical. 4.2 Acceptance 4.2.1 Purpose The purpose of acceptance inspections and tests is to check, as simply as possible, by a method repr
30、esentative of actual use conditions, that the seals constituting the production batch satisfy the requirements of this standard. EN 4054:2004 (E) 6 4.2.2 Conditions Acceptance inspections and tests are specified in Table 1. They shall be carried out on each production batch. Table 1 specifies the te
31、st method and the sampling plan applicable to each test. Seals from the production batch to be tested shall be selected by simple random sampling. Each seal may be submitted to several tests. The seals to be subjected to destructive tests may be those on which non-destructive tests have been carried
32、 out. 4.2.3 Responsibility Acceptance inspections and tests shall be carried out by the manufacturer, or under his responsibility. 4.2.4 Inspection and test report The manufacturer must ensure conformity of products according to the results obtained in relation to the requirements and carry out an i
33、nspections and test report giving the observed values. This report shall be provided to the purchaser. 5 Requirements See Table 1. EN 4054:2004 (E) 7 Table 1 Technical requirements and test methods Clause Characteristic Requirement Inspection and test method Q/A aSample size Q 5.1 Materials (armatur
34、e and rubber parts) In accordance with the product standard or definition document As stated in the material specification A Q See 4.1. 5.2 Dimensions and tolerances In accordance with the product standard or definition document Standard gauging at a temperature of (20 5 ) C A Table 2 5.3 Surface co
35、ndition Q See 4.1. 5.3.1 Armature The armature shall be exempt of surface defects as: burrs, deep seams, cracks or other imperfections detrimental to good functioning. Special attention shall be made (before rubber moulding) to the area in contact with the rubber to obtain perfect rubber adhesion du
36、ring moulding. Visual inspection Examination at a maximum magnification of 6 A 100 % Q See 4.1. 5.3.2 Rubber parts In accordance with the inspection document EN 3376 A 100 % Q One sample of each diameter 5.3.3 Finished product Moulding of the rubber part on the metallic part without any detrimental
37、defect to good functioning Cut out the item along a diametral plan and verify that the fastening of the rubber part on the metallic part is satisfactory. Q One sample of each diameter 5.4 Assembly Seating strength required to achieve a metal / metal contact Record the seating strength required to ac
38、hieve a metal / metal contact. The torque to be applied to achieve a metal / metal contact shall be compatible with a bolt and a standard seating torque for the seal assembly in the use condition. A Table 3 Q One sample of each diameter Resistance to ageing and pressurizing See annex A (normative).
39、Q One sample of each diameter 5.5 Performance Swelling by oil and fuel See annex B (normative). 5.6 Packaging See clause 6. Visual inspection A 100 % 5.7 Marking See clause 7. Visual inspection A 100 % 5.8 Storage See clause 8. Means adapted to the requirement aQ: Qualification, A: Acceptance EN 405
40、4:2004 (E) 8 Table 2 Sampling plans for visual inspections and dimensional characteristics Production batch size Sample size Acceptance number (Ac) and limiting quality (LQ 10 ) in accordance with the acceptance quality limit (AQL) AQL 0,065 % Ac LQ 10% 15 16 to 25 26 to 50 51 to 90 91 to 150 151 to
41、 280 281 to 500 501 to 1 200 1 201 to 3 200 3 201 to 10 000 10 001 to 35 000 35 001 to 150 000 150 001 3 5 8 13 20 32 50 80 125 200 315 500 800 0 1 1,14 0,485 Use sampling plan above. Use sampling plan below. The data given in this table are based on single sampling plans for a normal inspection, as
42、 specified in ISO 2859-1 (Tables 2-A and 6-A). A 100 % inspection should be performed when the sample size is as large as or larger than the batch size. Other sampling plans specified in ISO 2859-1 may be used (double or multiple sampling), but these shall be chosen in such a way as to ensure an equ
43、ivalent quality limit. Table 3 Sampling plans for the inspection of physical characteristics Sample size Production batch size Non-destructive tests A Destructive tests B Acceptance number(Ac) 500 501 to 3 200 3 201 to 35 000 35 001 8 13 20 32 3 5 5 8 0 0 0 0 EN 4054:2004 (E) 9 6 Packaging 6.1 Gener
44、al Packaging is intended to protect seals during storage. Seals shall be packed individually in watertight, opaque cases and shall be water vapour-, ozone-, oil- and greaseproof. This packaging shall be resistant enough to prevent the seals against any damage occurring in the course of handling and
45、transportation. 6.2 Individual package 6.2.1 Material The following materials shall be used: opaque polyethylene coated kraft paper; laminate consisting of aluminium, paper and polyethylene; opaque polyethylene film. The use of polyvinyl chloride film (PVC film) is not permissible. Transparent or tr
46、anslucent materials shall not be used. 6.2.2 Dimensions Depending on the size of the seals, use a large enough individual package without this, however, being larger than necessary. 6.3 Collective packaging Items, in their individual package, may be combined in collective packages. This package shal
47、l: be resistant enough so that the items: cannot be damaged in the course of handling or transportation, be protected against any damage due to exposure to environmental effects or any other normal hazard; bear a label legible from outside; contain seals with the same definition. 7 Marking 7.1 Indiv
48、idual package Each individual packet shall be legibly marked with not less than the following information: manufacturers identification; identity according to the product standard; batch number; quarter and year of vulcanization of the rubber part in bilingual (e.g. 3Q93 / 3T93); UNLIMITED SHELF LIF
49、E; mark (manufacturers monogram) or inspection stamp guaranteeing the products quality (packaging included). EN 4054:2004 (E) 10 7.2 Collective packaging The following information shall be marked on the collective packaging: manufacturers identification; identity according to the product standard; order number; quantity. 8 Storage See EN 27
