1、BS EN 754-7:2016Aluminium and aluminium alloys Cold drawn rod/bar and tubePart 7: Seamless tubes, tolerances on dimensions and formBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 754-7:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implem
2、entation of EN 754-7:2016. It supersedes BS EN 754-7:2008 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee NFE/35, Light metals and their alloys.A list of organizations represented on this committee can be obtained on request to its secretary.This publi
3、cation does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016. Published by BSI Standards Limited 2016ISBN 978 0 580 91006 7 ICS 77.150.10 Compliance with a British Standard cannot confer immun
4、ity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2016.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 754-7:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 754-7 June 2016 ICS 77
5、.150.10 Supersedes EN 754-7:2008English Version Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 7: Seamless tubes, tolerances on dimensions and form Aluminium et alliages daluminium - Barres et tubes tirs - Partie 7 : Tubes fils sur aiguille, tolrances sur dimensions et forme Alu
6、minium und Aluminiumlegierungen - Gezogene Stangen und Rohre - Teil 7: Nahtlose Rohre, Grenzabmae und Formtoleranzen This European Standard was approved by CEN on 11 April 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this E
7、uropean 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official vers
8、ions (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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria,
9、 Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, S
10、witzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN nat
11、ional Members. Ref. No. EN 754-7:2016 EBS EN 754-7:2016EN 754-7:2016 (E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 5 3 Tolerances on dimensions . 5 3.1 General 5 3.2 Diameter - Round tube 5 3.3 Width, depth or width across flats - squares, rectangles, hexagons, octagons
12、. 6 3.4 Wall thickness variation (eccentricity) . 7 3.5 Length 8 3.6 Squareness of cut ends 9 4 Tolerances on form 9 4.1 General 9 4.2 Straightness . 9 4.3 Convexity-Concavity 10 4.4 Twist . 11 4.5 Angularity . 12 4.6 Corner and fillet radii . 13 4.7 Depth of dents for round tube . 13 Annex A (infor
13、mative) Wall thickness variation (eccentricity) . 14 A.1 General . 14 A.2 Specifying round tube sizes and tolerances . 14 Bibliography . 16 BS EN 754-7:2016EN 754-7:2016 (E) 3 European foreword This document (EN 754-7:2016) has been prepared by Technical Committee CEN/TC 132 “Aluminium and aluminium
14、 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 endorsement, at the latest by December 2016, and conflicting national standards shall be withdrawn at the latest by December
15、2016. Attention 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. This document supersedes EN 754-7:2008. The following technical modifications ha
16、ve been introduced during the revision: correction of Subclause 3.2, Diameter - Round tube. 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
17、; Part 3: Round bars, tolerances on dimensions 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:
18、Porthole tubes, tolerances on dimensions and form. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland,
19、 Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 754-7:2016EN 754-7:2016 (E) 4
20、1 Scope This European Standard 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) or with a cross section contained within a circumscribing circle (CD) from 8 mm to
21、300 mm (other than round tube, see Figure 2) supplied in straight lengths. This European Standard only applies to tube produced by the seamless die/mandrel method of extrusion (and then cold drawn to the final dimensions required). The temper designations used in this part are according to EN 515. T
22、his 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), coiled tubes cut to length (EN 13958). Figure 1 Round tube Figure 2 Circums
23、cribing circle for other than round tube BS EN 754-7:2016EN 754-7:2016 (E) 5 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated r
24、eferences, the latest edition of the referenced document (including any amendments) applies. EN 754-1:2016, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 1: Technical conditions for inspection and delivery 3 Tolerances on dimensions 3.1 General When outside diameter (OD), inside di
25、ameter (ID), and wall thickness (t) (or their equivalent dimensions in other than round tube), are all specified, standard tolerances shall apply to any two of these dimensions, but not to all three. As a result, the purchaser shall only state two nominal dimensions on any given order. 3.2 Diameter
26、- Round tube Mean diameter is defined as the average of two diameter measurements taken at right angles to each other at any position along the length. The maximum allowable deviation of diameter at any point from the specified diameter is the maximum difference measured at any point along the lengt
27、h of the tube, i.e. it is inclusive of any ovality in the cross section. The tolerances on diameter are specified in Table 1. As detailed in EN 754-1:2016, Clause 4, if the original order does not make clear the nature of the diameter tolerances required, the supplier shall interpret them as inclusi
28、ve of any ovality (i.e. maximum allowable deviation at any point from the specified diameter in Table 1). However, the diameter tolerances may be expressed as both mean and inclusive of ovality if this is specifically requested by the purchaser. BS EN 754-7:2016EN 754-7:2016 (E) 6 Table 1 Tolerances
29、 on diameter for round tube Dimensions in millimetres Diameter (OD or ID) Tolerance on diameter Maximum allowable deviation of mean diameter from specified diameter eMaximum allowable deviation of diameter at any point from specified diameter aOver Up to and including Non-annealed and non heat treat
30、ed tube bHeat treated tube cTempers O, H111 and Tx510 3 8 0,04 d 0,08 d 0,12 d 0,25 d 8 18 0,05 0,09 0,15 0,30 18 30 0,06 0,10 0,20 0,40 30 50 0,07 0,12 0,25 0,50 50 80 0,09 0,15 0,36 0,70 80 120 0,14 0,20 0,60 1,2 120 200 0,25 0,40 1,2 2,4 200 350 0,38 0,60 1,7 3,4 aNot applicable to tubes having a
31、 wall thickness less than 2,5 % of the specified outside diameter. The tolerance for tubes with wall thickness less than 2,5 % of the specified outside diameter shall be determined by multiplying the applicable tolerance as follows: wall thickness over 2,0 % up to and including 2,5 % of outside diam
32、eter: 1,5 tolerance; wall thickness over 1,5 % up to and including 2,0 % of outside diameter: 2,0 tolerance; wall thickness over 1,0 % up to and including 1,5 % of outside diameter: 3,0 tolerance; wall thickness over 0,5 % up to and including 1,0 % of outside diameter: 4,0 tolerance. bApplies to all
33、 alloys in H1x, H2x, H3x tempers, and to alloy EN AW-6063 in the T832 temper. cApplies to all alloys in T3, T4, T6, T66, T73, T8, T9 and Tx511 tempers. dThis tolerance applies for outside diameter only, i.e. tube in this size range can only be specified as “Outside Diameter x Wall Thickness”. eShall
34、 not apply to Tx510 or Tx511 tempers. 3.3 Width, depth or width across flats - squares, rectangles, hexagons, octagons The tolerances on width, depth or width across flats are specified in Table 2. BS EN 754-7:2016EN 754-7:2016 (E) 7 Table 2 Tolerances on width, depth or width across flats Dimension
35、s in millimetres Width, depth or width across flats Maximum allowable deviation of width, depth or width across flats at any point from the specified value aOver Up to and including Non-annealed and non heat treated tube bHeat treated tube cAnnealed tube d 8 18 0,20 0,30 0,60 18 30 0,25 0,40 0,80 30
36、 50 0,35 0,50 1,0 50 80 0,50 0,70 1,4 80 120 0,70 1,0 2,0 120 200 1,0 1,5 3,0 aNot applicable to tubes having a wall thickness less than 2,5 % of the specified outside width, depth or width across flats. The tolerance for tubes with wall thickness less than 2,5 % of the specified width, depth or wid
37、th across flats shall be determined by multiplying the applicable tolerance as follows: wall thickness over 2,0 % up to and including 2,5 % of outside parameter: 1,5 tolerance; wall thickness over 1,5 % up to and including 2,0 % of outside parameter: 2,0 tolerance; wall thickness over 1,0 % up to an
38、d including 1,5 % of outside parameter: 3,0 tolerance; wall thickness over 0,5 % up to and including 1,0 % of outside parameter: 4,0 tolerance. bApplies to all alloys in F, H1x, H2x, H3x tempers. cApplies to all alloys in T3, T4, T6, T66, T73, T8, T9 and Tx511 tempers. dApplies to all alloys in O, H
39、111 and Tx510 tempers. 3.4 Wall thickness variation (eccentricity) The tolerances on wall thickness variation (eccentricity) are specified in Table 3. BS EN 754-7:2016EN 754-7:2016 (E) 8 Table 3 Tolerances on wall thickness variation (eccentricity) Nominal wall thickness t mm Tolerance on wall thick
40、ness variation for round tube (eccentricity) % aTolerance on wall thickness variation for other than round tube % a Over Up to and including 0,5 3 10 12 3 5 9 11 5 - 8 10 Round tube dimensions can be expressed in three different ways, i.e. outside diameter (OD) wall thickness (t), inside diameter (I
41、D) t (where t is the nominal wall thickness) and OD ID. Depending of the way of ordering the tube the values in Table 3 should be understood as follows (see Annex A for further explanation): for tubes specified as OD x t or ID x t the values are allowable variation at any point; for tubes specified
42、as OD x ID the above values are allowable variation from the calculated mean wall thickness. aFor OD greater than 150 mm together with and OD/t ratio of more than 10, the tolerance on wall thickness variation shall be subject to agreement between supplier and purchaser. 3.5 Length If fixed lengths a
43、re to be supplied, this shall be stated in the order document. The tolerances on fixed length are specified in Table 4. Table 4 Tolerances on fixed length Dimensions in millimetres Outside diameter or diameter of the circumscribing circle Tolerances on fixed length Over Up to and including L 2 000 2
44、 000 5 - 30 0,30 0,20 30 60 0,40 0,30 60 100 0,60 0,40 100 150 0,90 0,60 150 200 1,2 0,80 4.4 Twist Twist T shall be measured as shown in Figure 5 by placing the tube on a flat base plate, the tube resting under its own mass and measuring the maximum distance at any point along the length between th
45、e bottom surface of the tube and the base plate surface. Twist tolerances are specified in Table 7 as a function of the width W and the length L of the tube. Key 1 base plate Figure 5 Measurement of twist BS EN 754-7:2016EN 754-7:2016 (E) 12 Table 7 Twist tolerances Dimensions in millimetres Width W
46、 Twist tolerance T Per 1 000 mm of length aOn total tube length L Over Up to and Including Up to and including 6 000 mm Over 6 000 mm - 30 1,2 2,5 3,0 30 50 1,5 3,0 4,0 50 100 2,0 3,5 5,0 100 200 2,5 5,0 7,0 aTwist tolerances for lengths less than 1 000 mm shall be subject to agreement between suppl
47、ier and purchaser. 4.5 Angularity The deviation from square of square and rectangular tubes shall be measured as shown in Figure 6. The maximum allowable deviation from square is specified in Table 8 as a function of tube depth B. In the case of rectangular tubes, the tolerance on squareness shall a
48、pply to the shorter side of the tube. The maximum allowable deviation in an angle other than a right angle (hexagonal tubes, octagonal tubes) shall be included within the width across flats tolerances, see Table 2. Figure 6 Measurement of deviation from square BS EN 754-7:2016EN 754-7:2016 (E) 13 Ta
49、ble 8 Squareness tolerances for square and rectangular tubes Dimensions in millimetres Depth B Maximum allowable deviation Z from right angle Over Up to and including - 30 0,4 30 50 0,7 50 80 1,0 80 120 1,4 120 200 2,0 4.6 Corner and fillet radii Sharp corners and fillets radii may be slightly rounded unless otherwise indicated on the drawing. If corner and fillet radii are to be specified, these shall be subject to agreem
