1、BRITISH STANDARD AEROSPACE SERIES O-rings, in fluorocarbon rubber (FKM), low compression set - Technical specification The European Standard EN 30501998 has the statmi of a British Standard ICs 49.080 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW ZFw i BS EN 3050:1998 STD-BS
2、I BS EN 3050-ENGL 1998 rn 1624669 0735884 T4 rn BS EN 30601998 National foreword This British Standard is the English language version of EN 3050:1998. The UK participation in its preparation was entrusted to Technical Committee ACEX25, Rubber and elastomeric materials for aerospace purposes, to Sub
3、committee ACE/12/1, Aerospace fasteners - present to the responsible internationaiEuropean 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 in the TJK. A list of o
4、rganizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement intedonal or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Stan
5、dards Correspondznce Index”, or by using the “Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include ali the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standa
6、rd does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. This British Standard, having been prepared under the direction of the Engineering Sect
7、or Board, was published under the authority of the Standards Board and comes into effect on 15 August 1998 Amendments issued since publication Amd.No. I Date I Text affected O BSI 1998 ISBN O 680 30334 9 - STD-BSI BS EN 3050-ENGL 1998 It624669 0735885 920 W EUROPEAN STANDARD NORME EUROPENNE EUROPISC
8、HE NORM EN 3050 May 1998 ICs 49.080 Descriptors: aircrat industry, O-ring seal, rubber, fluorinated rubber, compression set, hardness, characteristic, specification, quality assurance, acceptance testing, packing English version Aerospace series - O-rings, in fluorocarbon rubber (FKM), low compressi
9、on set - Technical specification Srie arospatiaie - Joints toriques, en lastomre fluorocarbone (FKM). faible dformation rmanente aprs compression - Spcication technique Luft- und Raumfahrt - -Ringe, aus Fluorcarbon-Elastomer (FKM), mit niedrigem Druckverfomungsrest - Technische Lieferbedingungen Thi
10、s European Standard was approved by CEN on 23 February 1998. CEN members are bound to comply with the CENCENELEC Intemal 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 referen
11、ces concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Stendard 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
12、 its own language and notified to the Central Secretariat has the same status as the official versions. CEN members am the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland. Italy, Luxembourg, Netherlands. Norway, Portugal, Spa
13、in, Sweden, Switzerland and United Kingdom. EUROPEAN COMMEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPISCHES KOMITEE FUR NORMUNG Central Sacretariat: rue de Stassart, 36 : . _ . .La Q See 4.1. Hardness EN 3376 Density Q 3, see 4.1. Q 3, see 4.1. I. I. . .S2$W. See 4.1, Q A 100 % Corn
14、oression set Resistance to heat ageing Resistance to liquids Surface condition Packaging Requirement 1 Inspection and test method 1 QIA 1 I Sample size In accordance with the I Certificate of compliance I Q I . , EN 2798 After 24 h at 200 OC 25 % max. After 336 h at 200 OC 55 % max. Clai 5.1 5.2 5.3
15、 5.4 5.5 5.5.1 5.5.2 5.6 5.7 5.7.1 5.7.2 5.8 5.9 After 70 h at 250 OC Change in hardness O IRHD to + 5 IRHD After 70 h at 23 OC in liquid B Change in hardness O IRHD to - 5 IRHD Change in volume O%t+5% After 70 h at 200 OC in liquid 101 Change in hardness - 15 IRHD to O IRHD Change in volume O % to
16、+ 15 % Conform to acceptance document II IS0 1817 3, see 4.1. IS0 1817 100 % See annex A. I Visuai examination A Page 6 EN 3050: 1998 Production batch size Table 2: Sampling plans for visual inspections and dimensional charactefistics Sample size Non-destructive tests Destructive tests Acceptance nu
17、mber A B (Ac) Production batch size s 50 51 to 90 91 to 150 151 to 280 281 to 500 501 to 1200 1201 to 3200 3201 to 10000 10 O01 to 35 O00 35 O01 to 150 O00 150 O01 to 500 O00 Sample size 100 % 13 20 32 50 80 125 200 31 5 500 800 Acceptance number (Ac) and limiting quality (LQ) in accordance with the
18、 acceptable quality level (AQL) AQL 0,065 % Ac - 3- 3- 3- 3- 3- 3- O t 3- 1 f Use sampling plan above. 3- Use sampling plan below. NOTE: The data given in this table are based on single sampling plans for a normal inspection, as specified in IS0 2859-1 (tables Il-A and VI-A). Other sampling plans sp
19、ecified in IS0 2859-1 may be used (double or multiple sampling), but these shall be chosen in such a way as to ensure an equivalent quality level. Table 3: Sampling plans for the inspection of physical Characteristics 5 500 501 to 3 200 3201 to 35000 2 35001 8 13 20 32 I STDmBSI BS EN 3050-ENGL 1998
20、 Lb24669 07L589L 124 H Page 7 EN 3050:1998 Annex A (normative) A. i Packaging Packaging shall conform to the recommendations of IS0 1 749 with the following additional requirements, except for identification. A.l .I General O-rings shall be packed individually. The individual packages may be combine
21、d in collective packages in the form of strips or collective packages with perforations. These packages shall be water vapour-, ozone-, oil- and greaseproof and shall protect the product against compressive stresses. A.1.2 The following package materials may be used for the individual packages: Mate
22、rial of the individual package - opaque polyethylene coated kraft paper; - laminate consisting of aluminium, paper and polyethylene; - opaque polyethylene film. _I - The use of polyvinyl chloride film (PVC film) is not permissible. - I * * Transparent or translucent materials shall not be used. rn A
23、. 1.3 Depending on the size of the O-ring to be packed the following outside dimensions shall be applied for individual packages: Dimensions of the individual packages 55 mm x 55 mm1) 205 mm x 205 mm 11 75mmx 75mm 255 mm x 255 mm 1) 100 mm x 100 mm1) 150 mm x 150 mm1) 300 mm x 300 mm 400 mm x 400 mm
24、 The individual packages shall not be any larger than necessary. O-rings up to 205 mm internal diameter shall be packed flat (no loops or distortion). 1) Sizes in accordance with IS0 1749 - Page 8 EN 3050:1998 A. 1.4 Identification Each individual package and each carton shall be legibly marked with
25、 not less than the following information: Manufacturers identification; Identity according to the product standard; Inspection lot number or inspection and test report number; Quarter and year of vulcanization (e.g. 3Q93 or 3T933; UNLIMITED SHELF LIFE; Manufacturing inspection stamp; DO NOT BEND. Co
26、llective packaging Packaged O-rings shall be in cartons in such a manner that the O-rings are not permanently distorted during shipment and storage and be protected against damage from exposure to weather or any other common hazard. BS EN 3050:1998 BSI 389 Chiswick High Road London w4 4AL STDoBSI BS
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