1、Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/07/2008 07:24, Uncontrolled Copy, (c) BSIg49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58a
2、nd tube Part 8: Porthole tubes, tolerances on dimensions and formICS 77.150.10Aluminium and aluminium alloys Cold drawn rod/bar BRITISH STANDARDBS EN 754-8:2008BS EN 754-8:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/07/2008 07:24, Uncontrolled Copy, (c) BSIThis British Standard was
3、 published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008ISBN 978 0 580 55601 2Amendments/corrigenda issued since publicationDate Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunit
4、y from legal obligations.National forewordThis British Standard is the UK implementation of EN 754-8:2008. It supersedes BS EN 754-8:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee NFE/35, Light metals and their alloys.A list of organizations rep
5、resented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 754-8March 2008ICS 77.150.10 Supersedes EN 754-8:1998 English VersionAluminium and aluminium alloys
6、- Cold drawn rod/bar and tube -Part 8: Porthole tubes, tolerances on dimensions and formAluminium et alliages daluminium - Barres et tubes tirs -Partie 8: Tubes fils pont, tolrances sur dimensions etformeAluminium und Aluminiumlegierungen - Gezogene Stangenund Rohre - Teil 8: Mit Kammerwerkzeug Stra
7、nggepressteRohre, Grenzabmae und FormtoleranzenThis European Standard was approved by CEN on 10 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any altera
8、tion. Up-to-date lists and bibliographical references concerning such nationalstandards 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 transla
9、tionunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Gre
10、ece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement C
11、entre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 754-8:2008: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/07/2008 07:24, Uncontrolled Copy, (c) BSIEN 754-8:2008 (E) 2 Conte
12、nts 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, octagons.8 2.4 Wall thickness variation (eccentricity) 8 2.5 Length .9 2.6 Squareness of cut ends 9 3 Tolerances on form10 3.1 G
13、eneral10 3.2 Straightness .10 3.3 ConvexityConcavity 11 3.4 Twist11 3.5 Angularity .12 3.6 Corner and fillet radii.13 3.7 Depth of dents for round tubes13 Annex A (informative) Wall thickness variation (eccentricity) .15 A.1 General15 A.2 Specifying round tube sizes and tolerances 15 A.2.1 General15
14、 A.2.2 Wall thickness variation for tubes specified as OD t or ID t15 A.2.3 Wall thickness variation for tubes specified as OD ID .16 Bibliography 17 BS EN 754-8:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/07/2008 07:24, Uncontrolled Copy, (c) BSIEN 754-8:2008 (E) 3 Foreword This d
15、ocument (EN 754-8:2008) 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 endorsement, at the lates
16、t by September 2008, and conflicting national standards shall be withdrawn at the latest by September 2008. This document supersedes EN 754-8:1998. Within its programme of work, Technical committee CEN/TC 132 entrusted CEN/TC 132/WG 5 “Extruded and drawn products“ to revise EN 754-8:1998. The follow
17、ing technical modifications have been introduced during the revision: Clause 1: Scope is clarified with respect to what is not included Clause 1: Alloy EN AW-5049, EN AW-6262A and EN AW-6065 are added Subclause 2.4 and Table 3: Requirements to wall thickness variation (eccentricity) is introduced An
18、nex A: Informative Annex A is added explaining 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 Par
19、t 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: Porthole t
20、ubes, tolerances on dimensions and form 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. CEN/TC 132 affirms it is its policy that in th
21、e case when a patentee refuses to grant licenses on standardized standards products under reasonable and not discriminatory conditions then this product shall be removed from the corresponding standard. BS EN 754-8:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/07/2008 07:24, Uncontro
22、lled Copy, (c) BSIEN 754-8:2008 (E) 4 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gree
23、ce, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 754-8:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/07/2008 07:24, Uncontrolled Cop
24、y, (c) BSIEN 754-8:2008 (E) 5 1 Scope This document 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 circl
25、e (CD) from 8 mm to 300 mm (other than 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
26、-5251, EN AW-5052; EN AW-6012, EN AW-6060, 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
27、(and then cold drawn to the final dimensions). 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 754-8:2008Licensed Copy: Wang Bin, ISO/EXCHA
28、NGE CHINA STANDARDS, 17/07/2008 07:24, Uncontrolled Copy, (c) BSIEN 754-8:2008 (E) 6 Figure 2 Circumscribing circle for other than round tube 2 Tolerances on dimensions 2.1 General When outside diameter OD, inside diameter ID, and wall thickness t, (or their equivalent dimensions in other than round
29、 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. 2.2 Diameter - Round tube Mean diameter is defined as the average of two diameter measurements taken
30、at right angles to each other at any position along the length. The tolerances on diameter are specified in Table 1. BS EN 754-8:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/07/2008 07:24, Uncontrolled Copy, (c) BSIEN 754-8:2008 (E) 7 Table 1 Tolerances on diameter for round tube Di
31、mensions in millimetres Tolerance on diameter Diameter (OD or ID) Maximum allowable deviation of diameter at any point from specified diameter aOver Up to and including Maximum allowable deviation of mean diameter from specified diameter eNon-annealed and non heat treated tube bHeat treated tube cTe
32、mpers O, H111 and Tx510 3 8 0,04 d 0,08 d 0,12 d 0,25 d8 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 0,35 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 %
33、 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 diameter : 1,5 x tolerance; - wal
34、l thickness over 1,5 % up to and including 2,0 % of outside diameter : 2,0 x tolerance; - wall thickness over 1,0 % up to and including 1,5 % of outside diameter : 3,0 x tolerance; - wall thickness over 0,5 % up to and including 1,0 % of outside diameter : 4,0 x tolerance. bApplies to all alloys in
35、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 not apply
36、to Tx510 or Tx511 tempers. BS EN 754-8:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/07/2008 07:24, Uncontrolled Copy, (c) BSIEN 754-8:2008 (E) 8 2.3 Width, depth or width across flats - squares, rectangles, hexagons, octagons The tolerances on width, depth or width across flats are
37、specified in Table 2. Table 2 Tolerances on width, depth or width across flats Dimensions 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 trea
38、ted 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 to tubes having a wall thickness less than 2,5 % of the specified outside width, depth or width across flats. The tole
39、rance 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 thickness over 2,0 % up to and including 2,5 % of outside parameter : 1,5 x tolerance; - wall thickness over 1,5 % up
40、to and including 2,0 % of outside parameter : 2,0 x tolerance; - wall thickness over 1,0 % up to and including 1,5 % of outside parameter : 3,0 x tolerance; - wall thickness over 0,5 % up to and including 1,0 % of outside parameter : 4,0 x tolerance. bApplies to all alloys in F, H1x, H2x, H3x temper
41、s. 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. 2.4 Wall thickness variation (eccentricity) The tolerances on wall thickness variation (eccentricity) for round tubes are specified in Table 3. For other than round tubes
42、 the wall thickness variation tolerances shall be agreed between supplier and purchaser. BS EN 754-8:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/07/2008 07:24, Uncontrolled Copy, (c) BSIEN 754-8:2008 (E) 9 Table 3 Tolerances on wall thickness variation (eccentricity) for round tube
43、s 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 3.4 Twist Twist T shall be measured as shown in Figure 5 by placing the tube on a flat base plate,
44、 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. BS EN 754-8:2008Licensed Copy:
45、 Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/07/2008 07:24, Uncontrolled Copy, (c) BSIEN 754-8:2008 (E) 12 Key 1 base plate Figure 5 Measurement of twist Table 7 Twist tolerances Dimensions in millimetres Twist tolerance T Width W On total tube length L Over Up to and including Per 1 000 mm of length
46、 aUp 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 supplier and purchaser. 3.5 Angularity The deviation from square of square and rectangular tub
47、es 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 apply to the shorter side of the tube. BS EN 754-8:2008Licensed Copy: Wang Bin, ISO/EXCHAN
48、GE CHINA STANDARDS, 17/07/2008 07:24, Uncontrolled Copy, (c) BSIEN 754-8:2008 (E) 13 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
49、 square Table 8 Squareness tolerances for square and rectangular tube Dimensions in millimetres Depth B Over Up to and including Maximum allowable deviation Z From right angle - 30 0,4 30 50 0,7 50 80 1,0 80 120 1,4 120 200 2,0 3.6 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, thes
