EN 13957:2008
(Main)Aluminium and aluminium alloys - Extruded round, coiled tube for general applications - Specification
General Information
- Abstract
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 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 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 straight 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).
- Status
- Published
- Publication Date
- 14-Oct-2008
- Technical Committee
- CEN/TC 132 - Aluminium and aluminium alloys
- Drafting Committee
- WG 35 - Extruded products
- Current Stage
- 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
- Start Date
- 02-Dec-2024
- Completion Date
- 02-Dec-2024
Overview
EN 13957:2008 - Aluminium and aluminium alloys - Extruded round, coiled tube for general applications - is a CEN European Standard that specifies dimensional and form tolerances for porthole (bridge) extruded round aluminium tube supplied in coil form or as straight lengths cut from coiled material. It covers tubes with outside diameters (OD) greater than 2 mm up to and including 50 mm, mainly manufactured in the 1xxx and 3xxx alloy series for general engineering applications.
Key topics
- Scope and product type
- Applies only to porthole/bridge extruded, coiled round tube (coils or cut lengths).
- Excludes seamless mandrel/die extruded tubes (see EN 755-7) and tubes extruded as straight lengths (EN 755-8).
- Dimensional tolerances
- Includes OD/ID and wall thickness tolerances and rules for specifying only two of the three dimensions (OD, ID, t).
- Example OD tolerances: for OD 2–10 mm the standard gives local diameter deviation ±0.20 mm and mean-diameter allowances (e.g. ±0.60 mm for coiled tube, ±0.30 mm for straight lengths). Larger OD ranges have correspondingly larger limits.
- Wall thickness and eccentricity
- Mean wall thickness tolerances are specified (e.g. ±0.08 mm for t ≤ 0.8 mm; ±0.10 mm for 0.8–1.5 mm; ±0.15 mm for 1.5–2.5 mm).
- The standard defines wall thickness variation (eccentricity) and provides guidance on calculation and verification (Annex A).
- Form tolerances and straightness
- Limits and measurement methods for ovality, eccentricity and straightness are defined.
- Surface quality and lubrication
- Defines “normal quality” and options for stricter detection methods (eddy current, leak testing), surface lubricants and seller/purchaser agreements.
- Ordering and inspection
- Order document must state product form, alloy reference (EN 573-3), temper (EN 515), mechanical properties (EN 755-2), required dimensions (two of OD/ID/t), coil characteristics, quantity and any special requirements.
Applications and users
- Typical users: aluminium tube manufacturers, coil suppliers, procurement engineers, quality inspectors, designers and fabricators in general engineering, HVAC, heat exchangers, tubing for lightweight structures and other components that can use coiled extruded tubes.
- Practical value: ensures consistent dimensional quality and interchangeability for coiled extruded round tubes, supports procurement specifications, inspection criteria and production control.
Related standards
- EN 573-3 (chemical composition)
- EN 515 (temper designations)
- EN 755-2 (mechanical properties)
- EN 755-7 (seamless extruded tubes - excluded)
- EN 755-8 (straight-extruded tubes - excluded)
Keywords: EN 13957:2008, aluminium extruded round coiled tube, porthole extruded tube, dimensional tolerances, wall thickness eccentricity, coil form aluminium tubing, 1xxx 3xxx alloys.
Relations
- Effective Date
- 22-Dec-2008
- Effective Date
- 25-Mar-2026
- Refers
EN 12258-1:1998 - Aluminium and aluminium alloys - Terms and definitions - Part 1: General terms - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Get Certified
Connect with accredited certification bodies for this standard
Element Materials Technology
Materials testing and product certification.
Inštitut za kovinske materiale in tehnologije
Institute of Metals and Technology. Materials testing, metallurgical analysis, NDT.
Sponsored listings
Frequently Asked Questions
EN 13957:2008 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aluminium and aluminium alloys - Extruded round, coiled tube for general applications - Specification". This standard covers: 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 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 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 straight 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).
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 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 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 straight 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).
EN 13957:2008 is classified under the following ICS (International Classification for Standards) categories: 77.150.10 - Aluminium products. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 13957:2008 has the following relationships with other standards: It is inter standard links to EN 13957:2003, EN 573-3:2026, EN 12258-1:1998, EN 573-3:2019+A2:2023, EN 515:2017, EN 755-2:2025, EN 12392:2016, EN 12392:2016+A1:2022, EN 12392:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 13957:2008 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aluminij in aluminijeve zlitine - Iztiskane, okrogle, v kolut navite cevi za splošno uporabo - SpecifikacijaAluminium und Aluminiumlegierungen - Stranggepresste Rundrohre in Ringen für allgemeine Anwendungen - SpezifikationAluminium et alliages d'aluminium - Tubes ronds filés, fournis en couronnes pour applications générales - SpécificationAluminium and aluminium alloys - Extruded round, coiled tube for general applications - Specification77.150.10Aluminijski izdelkiAluminium productsICS:Ta slovenski standard je istoveten z:EN 13957:2008SIST EN 13957:2009en,fr,de01-januar-2009SIST EN 13957:2009SLOVENSKI
STANDARDSIST EN 13957:20041DGRPHãþD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13957October 2008ICS 77.150.10Supersedes EN 13957:2003
English VersionAluminium and aluminium alloys - Extruded round, coiled tubefor general applications - SpecificationAluminium et alliages d'aluminium - Tubes ronds filés,fournis en couronnes pour applications générales -SpécificationAluminium und Aluminiumlegierungen - StranggepressteRundrohre in Ringen für allgemeine Anwendungen -SpezifikationThis European Standard was approved by CEN on 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 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 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, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13957:2008: ESIST EN 13957:2009
Wall thickness variation (eccentricity).13 A.1 General.13 A.2 Specifying round tube sizes and tolerances.13 Bibliography.17
round tube produced by the porthole/bridge method, extruded in coil form to the final dimensions required; tube as above but delivered in straight 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 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 — Chemical 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 Terms 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 following: a) form and type of product: SIST EN 13957:2009
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 lengths, 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. SIST EN 13957:2009
...