1、BS EN 13957:2008ICS 77.150.10NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAluminium andaluminium alloys Extruded round,coiled tube for generalapplications SpecificationThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCo
2、mmittee on 31 October2008 BSI 2008ISBN 978 0 580 56396 6Amendments/corrigenda issued since publicationDate CommentsBS EN 13957:2008National forewordThis British Standard is the UK implementation of EN 13957:2008. Itsupersedes BS EN 13957:2003 which is withdrawn.The UK participation in its preparatio
3、n was entrusted to TechnicalCommittee NFE/35, Light metals and their alloys.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct a
4、pplication.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 13957:2008EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13957October 2008ICS 77.150.10 Supersedes EN 13957:2003 English VersionAluminium and aluminium alloys - Extruded round, coiled tubefor general
5、applications - SpecificationAluminium et alliages daluminium - Tubes ronds fils,fournis en couronnes pour applications gnrales -SpcificationAluminium und Aluminiumlegierungen - StranggepressteRundrohre in Ringen fr allgemeine Anwendungen -SpezifikationThis European Standard was approved by CEN on 6
6、September 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 alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be
7、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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Mana
8、gement 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, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norwa
9、y, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and
10、by any means reservedworldwide for CEN national Members.Ref. No. EN 13957:2008: EBS EN 13957:2008EN 13957:2008 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Ordering information.4 5 Requirements.6 5.1 Production and manufacturing processes .6 5.2 Quali
11、ty control6 5.3 Chemical composition limits6 5.4 Mechanical properties.6 5.5 Surface quality .6 5.6 Coil characteristics7 5.7 Additional requirements .7 6 Tolerances on dimensions .8 6.1 General8 6.2 Diameter (outside and/or inside)8 6.3 Wall thickness and wall thickness variation (eccentricity) .9
12、6.4 Length .10 6.5 Squareness of cut ends 11 6.6 Cut end quality.11 7 Tolerances on form11 7.1 General11 7.2 Straightness .11 Annex A (informative) Wall thickness variation (eccentricity) .13 A.1 General13 A.2 Specifying round tube sizes and tolerances 13 Bibliography 17 BS EN 13957:2008EN 13957:200
13、8 (E) 3 Foreword This document (EN 13957:2008) 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 en
14、dorsement, at the latest by April 2009, and conflicting national standards shall be withdrawn at the latest by April 2009. 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 identi
15、fying any or all such patent rights. This document supersedes EN 13957:2003. Within its programme of work, Technical Committee CEN/TC 132 entrusted CEN/TC 132/WG 5 “Extruded and drawn products“ to revise EN 13957:2003. The following editorial modifications have been introduced during the revision: t
16、he contents, text and tables have been changed to bring this European Standard in line with EN 755. The following technical modifications have been introduced during the revision: Clause 1 has been amended to make clear the products covered by this European Standard and those which are not. In addit
17、ion, the list of the most commonly used general engineering alloys is replaced by a reference to the alloy group only. Clauses 3 and 4 including Tables: the text and the tables are updated. Annex A (informative) has been added to provide further explanation of wall thickness variation (eccentricity)
18、 along with some examples. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. CEN/TC 132 affirms that it is its policy that in the case when a patentee
19、refuses to grant licenses on standardised standard products under reasonable and not discriminatory conditions, then this product is removed from the corresponding standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound t
20、o implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switz
21、erland and the United Kingdom. BS EN 13957:2008EN 13957:2008 (E) 4 1 Scope This European Standard specifies the tolerances on dimensions and form of round aluminium and aluminium alloys porthole extruded tubes with an outside diameter (OD) of over 2 mm up to and including 50 mm supplied in coil form
22、 or in straight lengths cut from coiled material: see Figure 1. This European Standard mainly applies to round extruded tube for general engineering applications manufactured in 1xxx series of aluminium and 3xxx series of alloys. The use of this European Standard for non-standardised 1xxx aluminium
23、and 3xxx alloys or alloys from other series, e.g. 5xxx or 6xxx, is subject to agreement between supplier and purchaser. This European Standard only applies to: round tube produced by the porthole/bridge method, extruded in coil form to the final dimensions required; tube as above but delivered in st
24、raight lengths cut from coiled material. This European Standard does not apply to: seamless extruded (die/mandrel method) tubes (EN 755-7); tubes extruded in straight lengths (i.e. not coiled) (EN 755-8). 2 Normative references The following referenced documents are indispensable for the application
25、 of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 515, Aluminium and aluminium alloys Wrought products Temper designations EN 573-3, Aluminium and aluminium alloys Chem
26、ical composition and form of wrought products Part 3: Chemical composition and form of products EN 755-2, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 2: Mechanical properties EN 12258-1:1998, Aluminium and aluminium alloys Terms and definitions Part 1: General terms 3 Ter
27、ms and definitions For the purposes of this document, the terms and definitions given in EN 12258-1:1998 and the following apply. 3.1 order document document or set of documents agreed between supplier and purchaser at the time of ordering 4 Ordering information The order document shall contain the
28、following: a) form and type of product: BS EN 13957:2008EN 13957:2008 (E) 5 the form of the product - porthole extruded tube in coil form or straight lengths, reference to EN 573-3 for chemical composition limits, reference to EN 515 for temper designation, any special requirements identified by the
29、 purchaser; b) reference to EN 755-2 for mechanical property limits; c) reference to this document (EN 13957); d) dimensions of the tube: length (where appropriate), and only two of the following dimensions: outside diameter, inside diameter, wall thickness; e) coil characteristics (where appropriat
30、e): inner coil diameter (often fixed/standardised), outer coil diameter, width/height of coil, coil weight limitations, drum/bobbin dimensions (where appropriate); f) quantity: mass, number of pieces, total length, tolerance on quantity; g) any requirements for inspection documents; h) any special r
31、equirements agreed between supplier and purchaser: marking of products, e.g. special identification, references to drawings, part numbers, etc., additional or special testing, surface finish requirements, BS EN 13957:2008EN 13957:2008 (E) 6 surface protection, packaging, use of A50mmvalue instead of
32、 A value for elongation; i) where special requirements are specified, this shall be stated on the order document with reference to the relevant European Standards. 5 Requirements 5.1 Production and manufacturing processes Unless otherwise specified in the order document, the production and manufactu
33、ring processes shall be left to the discretion of the manufacturer. Unless it is explicitly stated in the order document, no obligation shall be placed on the manufacturer to use the same processes for subsequent similar orders. 5.2 Quality control The supplier shall be responsible for the performan
34、ce of all inspection and tests required by the relevant European Standard and/or the particular specification prior to shipment of the product. If the purchaser wishes to inspect the product at the manufacturers works, he shall notify the supplier at the time of placing the order. 5.3 Chemical compo
35、sition limits The chemical composition limits shall be in conformity with the requirements specified in EN 573-3. If the purchaser requires closer limits for elements than those specified in EN 573-3, these limits shall be according to an agreement between supplier and purchaser and stated in the or
36、der document. 5.4 Mechanical properties The mechanical properties shall be in conformity with those specified in EN 755-2 or those agreed between supplier and purchaser and stated in the order document. Typical Brinell hardness (mainly used for flat surfaces, i.e. basically not suitable for round tu
37、bes/non-flat surfaces) values are given in EN 755-2, but they are not binding for acceptance purposes. However, a Brinell hardness value may be agreed upon for acceptance testing. 5.5 Surface quality 5.5.1 Surface quality in general The surface shall be free from defects prejudicial to its suitable
38、and proper use. The reference standard shall be agreed between supplier and purchaser. The product shall have a smooth and clean surface. However, small surface defects such as light scratches, indentations, discolouration and non-uniform surface appearance resulting from the manufacturing process (
39、which cannot always be totally avoided) are generally permitted. Such surface quality is commonly referred to as “normal quality”. A greater degree of tolerance of surface defects (in respect to both the number and severity) is normally necessary for tube supplied in coil form compared to straight l
40、engths, since it is not possible to remove individual defects within the coil. This issue should be taken into account by the purchaser when placing an order for coiled tube. BS EN 13957:2008EN 13957:2008 (E) 7 5.5.2 Surface defects and detection In the case of stricter and more specific requirement
41、s than “normal quality”, the following shall be subject to agreement between supplier and purchaser and stated in the order document: the testing/detection method (e.g. eddy current testing, pressure/leak testing etc.); the type (scratches, dents etc.) and size of defects; the method of marking the
42、defects (e.g. ink, paint). 5.5.3 Surface lubrication A surface lubricant may be provided if required to: prevent the occurrence of fretting corrosion during transport; reduce the risk for surface defects created during subsequent manufacturing processes (e.g. decoiling, straightening, cutting, tube
43、manipulation etc.); improve the resistance to surface failures related to surface damage resulting from improper handling and/or storage (e.g. water stains, condensation etc.). As the type and amount of lubrication can have an impact on the subsequent manufacturing process and the final application,
44、 the type and amount of lubricant shall be subject to agreement between supplier and purchaser and stated in the order document. 5.6 Coil characteristics 5.6.1 Coil dimensions The following coil dimensions shall be subject to agreement between supplier and purchaser and stated in the order document:
45、 outside diameter, inside diameter and maximum width/height or weight of the coil; in the case of coils to be supplied on drums/bobbins, the dimensions of the drum/bobbin shall also be specified. 5.6.2 Type of coil winding The type of coil winding (random or level winding) can be of importance to th
46、e subsequent manufacturing process (e.g. decoiling, straightening etc.) and shall, in such cases, be subject to agreement between supplier and purchaser and stated in the order document. 5.7 Additional requirements Any additional requirements shall be agreed between supplier and purchaser and stated
47、 on the order document. BS EN 13957:2008EN 13957:2008 (E) 8 6 Tolerances on dimensions 6.1 General When the outside diameter OD, inside diameter ID, and wall thickness t are all specified, see Figure 1, standard tolerances shall apply to any two of these dimensions, but not to all three. As a result
48、, the purchaser shall state only two nominal dimensions on any given order. Key OD Outside diameter ID Inside diameter t Wall thickness Figure 1 Round tube 6.2 Diameter (outside and/or inside) Mean diameter is defined as the average of two diameter measurements taken at right angles to each other at
49、 any point along the tube length. Ovality is defined as the measured difference between the individual maximum and minimum diameters at any point in the cross section (usually occurs at or about right angles to each other) and at any point along the tube length. The maximum allowable deviations on diameter are given in Table 1. BS EN 13957:2008EN 13957:2008 (E) 9 Table 1 Maximum allowable deviations on diameter (OD and ID) for round tube Dimensions in millimetres Maximum a
