BS-EN-754-7-2008.pdf
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1、BRITISH STANDARD BS EN 754-7:2008 Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 7: Seamless tubes, tolerances on dimensions and form ICS 77.150.10 ? BS EN 754-7:2008 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2
2、008 BSI 2008 ISBN 978 0 580 55600 5 National foreword This British Standard is the UK implementation of EN 754-7:2008. It supersedes BS EN 754-7:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee NFE/35, Light metals and their alloys. A list of orga
3、nizations 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. Compliance with a British Standard cannot confer immunity from legal obliga
4、tions. Amendments/corrigenda issued since publication DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 754-7 March 2008 ICS 77.150.10Supersedes EN 754-7:1998 English Version Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 7: Seamless tubes, tolerances on dimensio
5、ns and form Aluminium et alliages daluminium - Barres et tubes tirs - Partie 7: Tubes fils sur aiguille, tolrances sur dimensions et forme Aluminium und Aluminiumlegierungen - Gezogene Stangen und Rohre - Teil 7: Nahtlose Rohre, Grenzabmae und Formtoleranzen This European Standard was approved by CE
6、N on 10 February 2008. 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 lists and bibliographical references concerning such national standar
7、ds may be obtained on application to the CEN 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 under the responsibility of a CEN member into its own language and notified to
8、the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Net
9、herlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitati
10、on in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 754-7:2008: E EN 754-7:2008 (E) 2 Contents Page Foreword3 1 Scope 5 2 Tolerances on dimensions .6 2.1 General6 2.2 Diameter - Round tube 6 2.3 Width, depth or width across flats - squares, rectangles, hexagons,
11、octagons.7 2.4 Wall thickness variation (eccentricity) 7 2.5 Length.8 2.6 Squareness of cut ends 9 3 Tolerances on form9 3.1 General9 3.2 Straightness.9 3.3 Convexity-Concavity .10 3.4 Twist11 3.5 Angularity.12 3.6 Corner and fillet radii.13 3.7 Depth of dents for round tube13 Annex A (informative)
12、Wall thickness variation (eccentricity) .14 A.1 General14 A.2 Specifying round tube sizes and tolerances 14 A.2.1 General14 A.2.2 Wall thickness variation for tubes specified as OD t or ID t14 A.2.3 Wall thickness variation for tubes specified as OD ID .15 Bibliography16 BS EN 754-7:2008 EN 754-7:20
13、08 (E) 3 Foreword This document (EN 754-7:2008) has been prepared by Technical Committee CEN/TC 132 “Aluminium and aluminium alloys”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by e
14、ndorsement, at the latest by September 2008, and conflicting national standards shall be withdrawn at the latest by September 2008. This document supersedes EN 754-7:1998. Within its programme of work, Technical committee CEN/TC 132 entrusted CEN/TC 132/WG 5 “Extruded and drawn products“ to revise E
15、N 754-7:1998. The following technical modifications have been introduced during the revision: Clause 1: Scope is clarified with respect to what is not included Subclause 2.4 and Table 3: Requirements to wall thickness variation (eccentricity) is introduced Annex A: Informative Annex A is added expla
16、ining wall thickness variation (eccentricity) EN 754 comprises the following parts under the general title “Aluminium and aluminium alloys Cold drawn rod/bar and tube“: Part 1: Technical conditions for inspection and delivery Part 2: Mechanical properties Part 3: Round bars, tolerances on dimensions
17、 and form Part 4: Square bars, tolerances on dimensions and form Part 5: Rectangular bars, tolerances on dimensions and form Part 6: Hexagonal bars, tolerances on dimensions and form Part 7: Seamless tubes, tolerances on dimensions and form Part 8: Porthole tubes, tolerances on dimensions and form A
18、ttention 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. CEN/TC 132 affirms it is its policy that in the case when a patentee refuses to grant l
19、icenses on standardized standards products under reasonable and not discriminatory conditions then this product shall be removed from the corresponding standard. BS EN 754-7:2008 EN 754-7:2008 (E) 4 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the follow
20、ing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slove
21、nia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 754-7:2008 EN 754-7:2008 (E) 5 1 Scope This document specifies the tolerances on dimensions and form for aluminium and aluminium alloys cold drawn seamless tubes with an outside diameter (OD) from 3 mm to 350 mm (round tube, see Figure 1)
22、 or with a cross section contained within a circumscribing circle (CD) from 8 mm to 300 mm (other than round tube, see Figure 2) supplied in straight lengths. This standard only applies to tube produced by the seamless die/mandrel method of extrusion (and then cold drawn to the final dimensions requ
23、ired). The temper designations used in this part are according to EN 515. This document applies to cold drawn, seamless tube for general engineering applications. This document does not apply to: cold drawn tube produced by the porthole/bridge method (EN 754-8), tubes delivered in coils (EN 13958),
24、coiled tubes cut to length (EN 13958). Figure 1 Round tube Figure 2 Circumscribing circle for other than round tube BS EN 754-7:2008 EN 754-7:2008 (E) 6 2 Tolerances on dimensions 2.1 General When outside diameter (OD), inside diameter (ID), and wall thickness (t) (or their equivalent dimensions in
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