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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 754-8:1998 The Euro
2、pean Standard EN 754-8:1998 has the status of a British Standard ICS 23.040.15; 77.150.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 8: Porthole tubes, tolerances on dimensions and form This British Standard,
3、 having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 December 1998 BSI 1998 ISBN 0 580 30341 1 BS EN 754-8:1998 Amendments issued since publication Amd. No.DateText affected National fo
4、reword This British Standard is the English language version of EN 754-8:1998. This part of BS EN 754 is published together with: BS EN 754-7, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 7: Seamless tubes, tolerances on dimensions and form. BS EN 755-7, Aluminium and aluminium al
5、loys Extruded rod/bar, tube and profiles Part 7: Seamless tubes, tolerances on dimensions and form. BS EN 755-8, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 8: Porthole tubes, tolerances on dimensions and form. As a result of the publication of the above standards, BS 147
6、1:1972 is withdrawn. The following British Standards listed in the table are also partially superseded. NOTEThe table gives the full list of published European Standards which partially supersede the British Standards. British Standards partially superseded by this standard and other European Standa
7、rds BS 1474:1987BS 4300-4:1973BS 4300-12:1969BS 4300-15:1973 EN 515EN 515EN 515EN 515 EN 573-3EN 573-3EN 573-3EN 573-3 EN 573-4EN 573-4EN 573-4EN 573-4 EN 755-1EN 755-1EN 755-1EN 755-1 EN 755-2EN 755-2EN 755-2EN 755-2 EN 755-3EN 755-3EN 755-3EN 755-3 EN 755-4EN 755-4EN 755-4EN 755-4 EN 755-5EN 755-5
8、EN 755-5EN 755-5 EN 755-6EN 755-6EN 755-6EN 755-6 EN 755-7 EN 755-8 EN 755-7 EN 755-8 EN 755-7 EN 755-8 In addition, the British Standards in the table will be withdrawn when the following European Standards are published: EN 755-9, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles
9、Part 9: Profiles, tolerances on dimensions and form. EN 12020-1, Aluminium and aluminium alloys Extruded precision profiles in alloys EN AW 6060/EN AW 6063 Part 1: Technical conditions for inspection and delivery. EN 12020-2, Aluminium and aluminium alloys Extruded precision profiles in alloys EN AW
10、 6060/EN AW 6063 Part 2: Tolerances on dimensions and form. The UK participation in its preparation was entrusted by Technical Committee NFE/35, Light metals and their alloys, to Subcommittee NFE/35/5, Wrought aluminium and aluminium alloys, which has the responsibility to: aid enquirers to understa
11、nd the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee
12、 can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using th
13、e Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from l
14、egal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 9 and a back cover. CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36,
15、B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 754-8:1998 E EUROPEAN STANDARDEN 754-8 NORME EUROPE ENNE EUROPA ISCHE NORM July 1998 ICS 77.150.10 Descriptors: aluminium, aluminium alloys, drawn products, alumi
16、nium tubes, tolerances on dimension, tolerances on form English 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 e tire s Partie 8: Tubes file s a pont, tole rances sur dimens
17、ions et forme Aluminium und Aluminiumlegierungen Gezogene Stangen und Rohre Teil 8: Mit Kammerwerkzeug stanggeprete Rohre, Grenzabmae und Formtoleranzen This European Standard was approved by CEN on 1 July 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulat
18、e 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 standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exist
19、s 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 the Central Secretariat has the same status as the official versions. CEN members are the national standards bodi
20、es of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 754-8:1998 BSI 1998 Foreword This European Standard has been prepared by Technical Committee
21、 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 latest by January 1999, and conflicting national standards shall be wi
22、thdrawn at the latest by January 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Ital
23、y, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Within its programme of work, Technical Committee CEN/TC 132 entrusted CEN/TC 132/WG 5, Extruded and drawn products, to prepare the following standard: EN 754-8, Aluminium and aluminium alloys Cold drawn
24、 rod/bar and tube Part 8: Porthole tubes, tolerances on dimensions and form. This standard is part of a series of eight standards. The other standards deal with: EN 754-1, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 1: Technical conditions for inspection and delivery. EN 754-2, A
25、luminium and aluminium alloys Cold drawn rod/bar and tube Part 2: Mechanical properties. EN 754-3, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 3: Round bars, tolerances on dimensions and form. EN 754-4, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 4: Square bar
26、s, tolerances on dimensions and form. EN 754-5, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 5: Rectangular bars, tolerances on dimensions and form. EN 754-6, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 6: Hexagonal bars, tolerances on dimensions and form. EN 7
27、54-7, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 7: Seamless tubes, tolerances on dimensions and form. Contents Page Foreword2 1Scope3 2Tolerances on dimensions3 2.1General3 2.2Diameter round tube3 2.3Width, depth or width across flats squares, rectangles, hexagons, octagons3 2.
28、4Wall thickness5 2.5Length5 2.6Squareness of cut ends5 3Tolerances on form6 3.1General6 3.2Straightness6 3.3Convexityconcavity7 3.4Twist8 3.5Angularity8 3.6Corner and fillet radii9 3.7Depth of dents for round tubes9 ? Page 3 EN 754-8:1998 BSI 1998 1 Scope This part of EN 754 specifies the tolerances
29、 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 round tube, see Figure 2), supplied i
30、n straight lengths. This standard applies only to tube produced by the porthole/bridge method of extrusion (and then cold drawn to the final dimensions required). This standard applies only to cold drawn tube for general engineering applications made in the following alloys: EN AW-1050A, EN AW-1200,
31、 EN AW-1350; EN AW-3003, EN AW-3103; EN AW-5005, EN AW-5005A, EN AW-5051A, EN AW-5251, EN AW-5052; EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A, EN AW-6012, EN AW-6018; EN AW-6351, EN AW-6060, EN AW-6061, EN AW-6261, EN AW-6262; EN AW-6063, EN AW-6063A, EN AW-6463, EN AW-6081, EN AW-6082; EN AW
32、-7003, EN AW-7005, EN AW-7020. This standard does not apply to extruded cold drawn tube produced by the die/mandrel method or coiled tubes. Figure 1 Round tube Figure 2 Circumscribing circle for other than round tube 2 Tolerances on dimensions 2.1 General When outside diameter OD, inside diameter ID
33、, 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 state only two nominal dimensions on any given order. 2.2 Diameter round tube Me
34、an diameter is defined as the average of two diameter measurements taken at right angles to each other at any point along the length. The tolerances on diameter are specified in Table 1. 2.3 Width, depth or width across flats squares, rectangles, hexagons, octagons The tolerances on width, depth or
35、width across flats are specified in Table 2. ? Page 4 EN 754-8:1998 BSI 1998 Table 1 Tolerances on diameter for round tube Dimensions in millimetres Diameter (OD or ID)Tolerance on diameter Maximum allowable deviation of mean diameter from specified diameter6) Maximum allowable deviation of diameter
36、 at any point from specified diameter1) OverUp to and including Non-annealed and non heat treated tube2) Heat treated tube3)Annealed tube4) $ 38 0,045)0,085)0,125)0,255) 818 0,050,090,150,30 1830 0,060,100,200,40 3050 0,070,120,250,50 5080 0,090,150,360,70 80120 0,140,200,601,2 120200 0,250,401,22,4
37、 200350 0,380,601,73,4 1)Not applicable to tubes having a 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 thick
38、ness over 2,0 % up to and including 2,5 % of outside diameter: 1,5 3 tolerance; wall thickness over 1,5 % up to and including 2,0 % of outside diameter: 2,0 3 tolerance; wall thickness over 1,0 % up to and including 1,5 % of outside diameter: 3,0 3 tolerance; wall thickness over 0,5 % up to and incl
39、uding 1,0 % of outside diameter: 4,0 3 tolerance. 2)Applies to all alloys in F, H1x, H2x, H3x tempers, and to alloy EN AW-6063 in the T832 temper. 3)Applies to all alloys in T3, T4, T6, T66, T73, T8, T9 and Tx511 tempers. 4)Applies to all alloys in O, H111 and Tx510 tempers. 5)This tolerance applies
40、 for outside diameter only, i.e. tube in this size range can only be specified as Outside Diameter 3 Wall Thickness. 6)Shall not apply to Tx510 or Tx511 tempers. ? Page 5 EN 754-8:1998 BSI 1998 Table 2 Tolerances on width, depth or width across flats Dimensions in millimetres Width, depth or width a
41、cross flatsMaximum allowable deviation of width, depth or width across flats at any point from the specified value1) OverUp to and includingNon-annealed and non heat treated tube2) Heat treated tube3)Annealed tube4) $ 818 0,200,300,60 1830 0,250,400,80 3050 0,350,501,0 5080 0,500,701,4 80120 0,701,0
42、2,0 120200 1,01,53,0 1)Not 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 width across flats shall be determined by multiplying the a
43、pplicable tolerance as follows: wall thickness over 2,0 % up to and including 2,5 % of outside parameter: 1,5 3 tolerance; wall thickness over 1,5 % up to and including 2,0 % of outside parameter: 2,0 3 tolerance; wall thickness over 1,0 % up to and including 1,5 % of outside parameter: 3,0 3 tolera
44、nce; wall thickness over 0,5 % up to and including 1,0 % of outside parameter: 4,0 3 tolerance. 2)Applies to all alloys in F, H1x, H2x, H3x tempers. 3)Applies to all alloys in T3, T4, T6, T66, T73, T8, T9 and Tx511 tempers. 4)Applies to all alloys in O, H111 and Tx510 tempers. 2.4 Wall thickness The
45、 tolerances on wall thickness are specified in Table 3. Table 3 Tolerances on wall thickness Wall thickness t mm Tolerance on wall thickness at any point % OverUp to and including $ 0,352 7 23 6 3 5 2.5 Length If fixed lengths are to be supplied, this shall be stated on the order. The maximum allowa
46、ble tolerances on fixed length are specified in Table 4. If no fixed length is specified in the order, porthole tubes may be delivered in random lengths. The length range and the tolerances on the random length shall be subject to agreement between purchaser and supplier. 2.6 Squareness of cut ends
47、The squareness of cut ends shall be within half of the fixed-length tolerance range specified in Table 4 for both fixed and random lengths, e.g. for a fixed-length tolerance ofmm the squareness of cut ends shall 0 +10 be within 5 mm. ? Page 6 EN 754-8:1998 BSI 1998 Table 4 Tolerances on fixed length
48、 Dimensions in millimetres Outside diameter or diameter of the circumscribing circle Tolerances on fixed length OverUp to and including L # 2 0002 000 5 300,300,20 30600,400,30 601000,600,40 1001500,900,60 1502001,20,80 ? Page 8 EN 754-8:1998 BSI 1998 3.4 Twist The twist measurement shall be carried
49、 out as shown in Figure 5 with the tube resting under its mass on a flat base plate. The twist tolerances are specified in Table 7 as a function of the width W and the length L of the tube. Figure 5 Measurement of twist Table 7 Twist tolerances Dimensions in millimetres Width WTwist tolerance T On total tube length L OverUp to