BS EN 4551 pdf free download

BS EN 4551 pdf free download. Pipe coupling 37º, in heat resisting steel — Swivel nuts — Inch series.
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 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 references, 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). ISO 31 61 Aerospace – UNJ threads – General requirements and limit dimensions. ISO 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 1 ) . EN 3468 Aerospace series – Steel FE-PA1 3 – Softened – 500 ≤ R m ≤ 700 MPa – Forgings – D e ≤ 1 00 mm 1 ) . EN 3487 Aerospace series – Steel FE-PA1 3 – Softened – 500 ≤ R m ≤ 700 MPa – Bars for machining – D e ≤ 1 00 mm 1 ) . EN 4560 Aerospace series – Pipe couplings, 37°, spherical, up to 21 000 kPa – Inch series – Technical specification. 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. 3.2 Materials EN 3468 with minimum hardness HB > 1 40 or EN 3487 with minimum hardness HB > 1 40 Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: orders@bsi-global.com. Standards are also available from the BSI website at http://www.bsi-global.com. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: info@bsi-global.com. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001.BS EN 4551 pdf download.