1、BS EN 754-8:2016Aluminium and aluminiumalloys Cold drawn rod/barand tubePart 8: Porthole tubes, tolerances ondimensions and formBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 754-8:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implement
2、ation of EN 754-8:2016. Itsupersedes BS EN 754-8:2008 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee NFE/35, Light metals and their alloys.A list of organizations represented on this committee can beobtained on request to its secretary.This publication
3、 does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 91007 4ICS 77.150.10Compliance with a British Standard cannot confer immunity fromleg
4、al obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2016.Amendments issued since publicationDate Text affectedBS EN 754-8:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 754-8 June 2016 ICS 77.150.10 Supersedes EN 7
5、54-8:2008English Version Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 8: Porthole tubes, tolerances on dimensions and form Aluminium et alliages daluminium - Barres et tubes tirs - Partie 8 : Tubes fils pont, tolrances sur dimensions et forme Aluminium und Aluminiumlegierungen
6、 - Gezogene Stangen und Rohre - Teil 8: Mit Kammerwerkzeug Stranggepresste 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 Europe
7、an 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 versions
8、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, Belg
9、ium, 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, Switze
10、rland, 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 national
11、 Members. Ref. No. EN 754-8:2016 EBS EN 754-8:2016EN 754-8:2016 (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 . 6 3
12、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 ConvexityConcavity . 10 4.4 Twist . 11 4.5 Angularity . 12 4.6 Corner and fillet radii . 13 4.7 Depth of dents for round tubes . 13 Annex A (informat
13、ive) Wall thickness variation (eccentricity) . 15 A.1 General . 15 A.2 Specifying round tube sizes and tolerances . 15 Bibliography . 17 BS EN 754-8:2016EN 754-8:2016 (E) 3 European foreword This document (EN 754-8:2016) has been prepared by Technical Committee CEN/TC 132 “Aluminium and aluminium al
14、loys”, 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 201
15、6. 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 754-8:2008. The following technical modifications have
16、been introduced during the revision: 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; Part 3: Round ba
17、rs, 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: Porthole tubes, to
18、lerances 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, Former Yugoslav R
19、epublic 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 754-8:2016EN 754-8:2016 (E) 4 1 Scope This Europ
20、ean Standard specifies the tolerances on dimensions and form for aluminium and aluminium alloy cold drawn porthole 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 300 mm (other than
21、round tube, see Figure 2), supplied in straight lengths. This document only applies to cold drawn tube for general engineering applications made in the following alloys: EN AW-1050A, EN AW-1200; EN AW-3003, EN AW-3103; EN AW-5005, EN AW-5005A, EN AW-5049, EN AW-5251, EN AW-5052; EN AW-6012, EN AW-60
22、60, EN AW-6061, EN AW-6262, EN AW-6262A; EN AW-6063, EN AW-6063A, EN AW-6065, EN AW-6082; EN AW-7020. The temper designations used in this part are according to EN 515. This document only applies to tube produced by the porthole/bridge method of extrusion only (and then cold drawn to the final dimen
23、sions). This document does not apply to: cold drawn tubes produced by the seamless, die/mandrel method (EN 754-7), tubes delivered in coils (EN 13958), coiled tubes cut to length (EN 13958). Figure 1 Round tube BS EN 754-8:2016EN 754-8:2016 (E) 5 Figure 2 Circumscribing circle for other than round t
24、ube 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 references, the latest edition of the referenced document (including any a
25、mendments) 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 diameter ID, and wall thickness t, (or their equivalent dimensions in other t
26、han 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 - Round tube Mean diameter is defined as the average of two diameter measuremen
27、ts taken at right angles to each other at any position along the length. The maximum allowable deviation at any point from the specified diameter is the maximum difference measured at any point along the length of the tube, i.e. it is inclusive of any ovality in the cross section. The tolerances on
28、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 inclusive of any ovality (i.e. maximum allowable deviation at any point from the specified diamete
29、r 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 754-8:2016EN 754-8:2016 (E) 6 Table 1 Tolerances on diameter for round tube Dimensions in millimetres Diameter (OD or ID) Tolerance on diam
30、eter 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 treated tube bHeat treated tube cTempers O, H111 and Tx510 3 8 0,04 d 0,08 d0,12 d0,25 d8 18 0,0
31、5 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 0,35 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 wall thickness less than 2,5 % of the specified outside diameter. The tolerance for tubes wit
32、h 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 diameter: 1,5 tolerance; wall thickness over 1,5 % up to and including 2,0 % of outside diameter:
33、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 alloys in H1x, H2x, H3x tempers, and to alloy EN AW-6063 in the T832 temper. cApplies to all
34、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 not apply to Tx510 or Tx511 tempers. 3.3 Width, depth or width across flats - squares, rectan
35、gles, hexagons, octagons The tolerances on width, depth or width across flats are specified in Table 2. BS EN 754-8:2016EN 754-8:2016 (E) 7 Table 2 Tolerances on width, depth or width across flats Dimensions in millimetres Width, depth or width across flats Maximum allowable deviation of width, dept
36、h 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 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
37、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 than2,5 % of the specified width, depth or width across flats shall be determined by multiplying the applicable tolerance as follows: wall th
38、ickness 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 and including 1,5 % of outside parameter: 3,0 tolerance; wall thickness over 0,5 % up to and incl
39、uding 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, H111 and Tx510 tempers. 3.4 Wall thickness variation (eccentricity) The tolerances on wall thick
40、ness variation (eccentricity) for round tubes are specified in Table 3. For other than round tubes the wall thickness variation tolerances shall be agreed between supplier and purchaser. BS EN 754-8:2016EN 754-8:2016 (E) 8 Table 3 Tolerances on wall thickness variation (eccentricity) for round tubes
41、 Nominal wall thickness t mm Tolerance on wall thickness variation (eccentricity) % Over Up to and including For OD 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,
42、the tube resting under its own mass and measuring the maximum distance at any point along the length between the 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 Measu
43、rement of twist BS EN 754-8:2016EN 754-8:2016 (E) 12 Table 7 Twist tolerances Dimensions in millimetres Width W 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 1
44、00 200 2,5 5,0 7,0 aTwist tolerances for lengths less than 1 000 mm shall be subject to agreement between supplier 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
45、in Table 8 as a function of tube depth B. In the case of rectangular tubes, the tolerance on squareness shall apply 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
46、 tolerances, see Table 2. Figure 6 Measurement of deviation from square BS EN 754-8:2016EN 754-8:2016 (E) 13 Table 8 Squareness tolerances for square and rectangular tube 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 8
47、0 1,0 80 120 1,4 120 200 2,0 4.6 Corner and fillet radii Sharp corners and fillet 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 agreement between supplier and purchaser together with relevant toleran
48、ces. 4.7 Depth of dents for round tubes The tolerances for depth of dents for round tubes are specified in Table 9. The tolerances for other than round tube shall be subject to agreement between supplier and purchaser. BS EN 754-8:2016EN 754-8:2016 (E) 14 Table 9 Depth of dents tolerances for round
49、tube Dimensions in millimetres Outside or Inside Diameter Tolerance on depth of dent aOver Up to and including Non-annealed and non heat treated tube bHeat treated tubec Annealed tube d3 8 0,08 0,12 0,25 8 18 0,09 0,15 0,30 18 30 0,10 0,20 0,40 30 50 0,12 0,25 0,50 50 80 0,15 0,35 0,70 80 120 0,20 0,60 1,20 120 200 0,40 1,20 2,40 200 350 0,60 1,70 3,40 aDepth of dents shall not exceed the tolerances specified in Table 9 at an
