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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 754-7:1998 The Euro
2、pean Standard 754-7:1998 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 7: Seamless tubes, tolerances on dimensions and form This British Standard, ha
3、ving 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 30336 5 BS EN 754-7:1998 Amendments issued since publication Amd. No.DateText affected National forew
4、ord This British Standard is the English language version of EN 754-7:1998. This part of BS EN 754 is published together with: BS EN 754-8, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 8: Porthole tubes, tolerances on dimensions and form. BS EN 755-7, Aluminium and aluminium alloy
5、s 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 1471:1
6、972 is withdrawn. The following British Standards listed in the table are also partially superseded.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 British Standards partially superseded by this standard and other European Standards
7、 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 755-5EN
8、755-5EN 755-5 EN 755-6EN 755-6EN 755-6EN 755-6 EN 755-7EN 755-7EN 755-7 EN 755-8EN 755-8EN 755-8 In addition, the British Standards in the table will be withdrawn when the following European Standards are published: EN 755-9, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 9:
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 6060/E
10、N AW 6063 Part 2: Tolerances on dimensions and form. The UK participation in its preparation was entrusted to 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 understand the
11、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 can be
12、 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 the Find
13、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 legal ob
14、ligations. 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, B-1050
15、Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 754-7:1998 E EUROPEAN STANDARDEN 754-7 NORME EUROPE ENNE EUROPA ISCHE NORM July 1998 ICS 77.150.10 Descriptors: aluminium, aluminium alloys, drawn products, aluminium tu
16、bes, tolerances on dimensions, tolerances on form English 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 e tire s Partie 7: Tubes file s sur aiguille, tolerances sur dimensi
17、ons et forme Aluminium und Aluminiumlegierungen Gezogene Stangen und Rohre Teil 7: Nahtlose 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 stipulate the conditions for giv
18、ing 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 exists in three official vers
19、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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium,
20、Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 754-7:1998 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 132, Aluminium a
21、nd 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 withdrawn at the latest by
22、 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, Italy, Luxembourg, Netherlan
23、ds, 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 754-7, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 7
24、: Seamless 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, Aluminium and aluminium a
25、lloys 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 bars, tolerances on dimensi
26、ons 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 754-8, Aluminium and alum
27、inium alloys Cold drawn rod/bar and tube Part 8: Porthole 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 2.4Wall thickness5 2.5Leng
28、th5 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 tube9 Page 3 EN 754-7:1998 BSI 1998 1 Scope This part of EN 754 specifies the tolerances on dimensions and form for
29、 aluminium and aluminium alloy 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 300 mm (other than round tube, see Figure 2) supplied in straight lengths. This sta
30、ndard applies only to tube produced by the seamless die/mandrel method of extrusion (and then cold drawn to the final dimensions required). This standard applies to cold drawn, seamless tube for general engineering applications. This standard does not apply to extruded, cold drawn tube produced by t
31、he porthole/bridge method or to coiled tube. 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, and wall thickness t (or their equivalent dimensions in other than round tube), are all speci
32、fied, 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 Mean diameter is defined as the average of two diameter measurements taken at right angles to eac
33、h 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 width across flats are specified in Table 2. Page 4 EN 754-7:1998 BSI 1998 Table 1 Tolerances o
34、n 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 at any point from specified diameter1) OverUp to and including Non-annealed and non heat treated
35、 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 200350 0,380,601,73,4 1) Not applicable to tubes having a wall thickness less than 2,5 % of the s
36、pecified 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 3 tolerance; wall thickness ov
37、er 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 including 1,0 % of outside diameter: 4,0 3 tolerance. 2) Applies to all alloys in F, H1x, H2x, H3x te
38、mpers, 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 for outside diameter only, i.e. tube in this size range can only be specified as Outside Dia
39、meter 3 Wall Thickness. 6) Shall not apply to Tx510 or Tx511 tempers. Page 5 EN 754-7:1998 BSI 1998 Table 2 Tolerances on width, depth or width across flats Dimensions in millimetres Width, depth or width across flatsMaximum allowable deviation of width, depth or width across flats at any point from
40、 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 0,701,02,0 120200 1,01,53,0 1) Not applicable to tubes having a wall thickness less than 2,5 % of the
41、 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 applicable tolerance as follows: wall thickness over 2,0 % up to and including 2,5 % of outsid
42、e 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 tolerance; wall thickness over 0,5 % up to and including 1,0 % of outside parameter: 4,0 3 toleranc
43、e. 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 tolerances on wall thickness are specified in Table 3. Table 3 Tolerances on wall thickne
44、ss Wall thickness t Maximum allowable deviation of wall thickness at any point from the specified value mm% OverUp to and including Round tubeOther than round tube $ 0,52 1012 23 911 3 810 2.5 Length If fixed lengths are to be supplied, this shall be stated on the order. The tolerances on fixed leng
45、th are specified in Table 4. If no fixed length is specified in the order, seamless 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 The squareness of cut ends s
46、hall 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 754-7:1998 BSI 1998 Table 4 Tolerances on fixed length Dimensions in millimetres Out
47、side 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 754-7:1998 BSI 1998 3.4 Twist The twist measurement shall be carried out as shown in Figure 5 with t
48、he 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 and
49、 including Per 1 000 mm of length1) Up to and including 6 000 mm Over 6 000 mm 301,22,53,0 30501,53,04,0 501002,03,55,0 1002002,55,07,0 1) Twist tolerances for lengths less than 1 000 mm shall be subject to agreement between purchaser and supplier. 3.5 Angularity The deviation from square of square tubes and rectangular tubes shall be measured as shown in Figure 6. The maximum allowab