EN 754-8:2016

• Abstract:

  This European Standard 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 circle (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-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 (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).; (...)

• Status: Published
• Publication Date: 07-Jun-2016
• Withdrawal Date: 30-Dec-2016
• ICS: 77.150.10 - Aluminium products
• Technical Committee: CEN/TC 132 - Aluminium and aluminium alloys
• Drafting Committee: WG 35 - Extruded products
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 15-Jun-2022
• Completion Date: 17-Sep-2026
• Ref Project: SIST EN 754-8:2016 - Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 8: Porthole tubes, tolerances on dimensions and form

• Replaces: EN 754-8:2008 - Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 8: Porthole tubes, tolerances on dimensions and form
• Effective Date: 18-Jun-2014
• Referred By: EN 13480-8:2024 - Metallic industrial piping - Part 8: Additional requirements for aluminium and aluminium alloy piping
• Effective Date: 28-Jan-2026
• Referred By: EN 15088:2005 - Aluminium and aluminium alloys - Structural products for construction works - Technical conditions for inspection and delivery
• Effective Date: 28-Jan-2026
• Referred By: EN 12392:2000 - Aluminium and aluminium alloys - Wrought products - Special requirements for products intended for the production of pressure equipment
• Effective Date: 28-Jan-2026
• Referred By: EN 570:2007 - Aluminium and aluminium alloys - Impact extrusion slugs obtained from wrought products - Specification
• Effective Date: 28-Jan-2026
• Referred By: EN 13480-8:2017 - Metallic industrial piping - Part 8: Additional requirements for aluminium and aluminium alloy piping
• Effective Date: 28-Jan-2026
• Referred By: EN 754-1:2016 - Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 1: Technical conditions for inspection and delivery
• Effective Date: 28-Jan-2026
• Referred By: EN 12514:2020 - Components for supply systems for consuming units with liquid fuels
• Effective Date: 28-Jan-2026
• Referred By: EN 754-1:2008 - Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 1: Technical conditions for inspection and delivery
• Effective Date: 28-Jan-2026
• Referred By: EN 1090-3:2008 - Execution of steel structures and aluminium structures - Part 3: Technical requirements for aluminium structures
• Effective Date: 28-Jan-2026
• Referred By: EN 12392:2025 - Aluminium and aluminium alloys - Wrought products and cast products - Special requirements for products intended for the production of pressure equipment
• Effective Date: 28-Jan-2026
• Referred By: EN 13195:2009 - Aluminium and aluminium alloys - Specifications for wrought and cast products for marine applications (shipbuilding, marine and offshore)
• Effective Date: 28-Jan-2026
• Referred By: EN 1090-3:2019 - Execution of steel structures and aluminium structures - Part 3: Technical requirements for aluminium structures
• Effective Date: 28-Jan-2026
• Referred By: EN 12392:2016+A1:2022 - Aluminium and aluminium alloys - Wrought products and cast products - Special requirements for products intended for the production of pressure equipment
• Effective Date: 28-Jan-2026
• Referred By: EN 14015:2004 - Specification for the design and manufacture of site built, vertical, cylindrical, flat-bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperature and above
• Effective Date: 28-Jan-2026

Overview

EN 754-8:2016 - Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 8: Porthole tubes, tolerances on dimensions and form - is a CEN European Standard that defines dimensional and form tolerances for cold drawn porthole/bridge-extruded aluminium tubes supplied in straight lengths. It applies to round tubes with outside diameters (OD) from 3 mm to 350 mm and to other cross-sections contained within a circumscribing circle (CD) from 8 mm to 300 mm. The standard covers commonly used aluminium alloys (EN AW‑ series listed in the standard) and references temper designations per EN 515.

Key topics and technical requirements

• Scope & method: Applies only to tubes produced by the porthole/bridge extrusion method and subsequently cold drawn. It does not apply to seamless die/mandrel tubes (see EN 754‑7) or coiled tubes (EN 13958).
• Alloys covered: Includes EN AW‑1050A, 1200, 3003, 3103, 5005/5005A/5049/5251/5052, 6012, 6060/6061/6063/6065/6082/6262/6262A, 7020.
• Dimensional tolerances: Tolerances are specified in tables for:
  • Diameter (OD/ID) - mean vs. inclusive-of-ovality options; supplier interprets unspecified orders as inclusive of ovality.
  • Widths/width across flats for non-round sections (squares, rectangles, hexagons, octagons).
  • Wall thickness variation (eccentricity) for round tubes (tabled by nominal t and OD ranges); for other shapes eccentricity tolerances are to be agreed.
  • Length and squareness of cut ends - fixed-length tolerances are tabulated; random lengths require agreement.
• Form tolerances: Defined limits and measurement methods for:
  • Straightness (deviation per metre and localized kinks),
  • Convexity–concavity,
  • Twist,
  • Angularity, corner/fillet radii, and dents (specifics and measurement methods are provided).
• Ordering rules: When OD, ID and t are all specified, only two are subject to standard tolerances - purchasers should specify only two nominal dimensions.

Practical applications & users

• Who uses it: Tube manufacturers (extrusion and drawing mills), quality inspectors, procurement specialists, designers and engineers in automotive, HVAC, heat exchanger, mechanical and structural engineering who specify aluminium porthole tubes for general engineering applications.
• Why it matters: Ensures interchangeability, consistent quality and predictable fit when tubes are used in assemblies, fittings, heat exchangers or structural components. Provides measurement procedures and acceptance criteria for incoming inspection and supplier agreements.

Related standards

• EN 754-1:2016 - Technical conditions for inspection and delivery (normative reference)
• EN 754-7 - Seamless tubes, tolerances on dimensions and form
• EN 13958 - Coiled aluminium tubes
• EN 515 - Temper designations for aluminium

Keywords: EN 754-8:2016, aluminium porthole tubes tolerances, cold drawn aluminium tube, porthole/bridge extrusion, OD ID wall thickness, ovality, eccentricity, straightness, convexity, twist.

SLOVENSKI STANDARD
01-september-2016
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SIST EN 754-8:2008
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Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 8: Porthole tubes,
tolerances on dimensions and form
Aluminium und Aluminiumlegierungen - Gezogene Stangen und Rohre - Teil 8: Mit
Kammerwerkzeug Stranggepresste Rohre, Grenzabmaße und Formtoleranzen
Aluminium et alliages d'aluminium - Barres et tubes étirés - Partie 8 : Tubes filés à pont,
tolérances sur dimensions et forme
Ta slovenski standard je istoveten z: EN 754-8:2016
ICS:
77.150.10 Aluminijski izdelki Aluminium products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 754-8
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2016
EUROPÄISCHE NORM
ICS 77.150.10 Supersedes EN 754-8:2008
English Version
Aluminium and aluminium alloys - Cold drawn rod/bar
and tube - Part 8: Porthole tubes, tolerances on
dimensions and form
Aluminium et alliages d'aluminium - Barres et tubes Aluminium und Aluminiumlegierungen - Gezogene
étirés - Partie 8 : Tubes filés à pont, tolérances sur Stangen und Rohre - Teil 8: Mit Kammerwerkzeug
dimensions et forme Stranggepresste Rohre, Grenzabmaße und
Formtoleranzen
This European Standard was approved by CEN on 11 April 2016.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate 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 CEN-CENELEC 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
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 754-8:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 5
3 Tolerances on dimensions . 5
3.1 General . 5
3.2 Diameter - Round tube . 5
3.3 Width, depth or width across flats - squares, rectangles, hexagons, octagons . 6
3.4 Wall thickness variation (eccentricity) . 7
3.5 Length . 8
3.6 Squareness of cut ends . 9
4 Tolerances on form . 9
4.1 General . 9
4.2 Straightness . 9
4.3 Convexity–Concavity . 10
4.4 Twist . 11
4.5 Angularity . 12
4.6 Corner and fillet radii . 13
4.7 Depth of dents for round tubes . 13
Annex A (informative) Wall thickness variation (eccentricity) . 15
A.1 General . 15
A.2 Specifying round tube sizes and tolerances . 15
Bibliography . 17

European foreword
This document (EN 754-8:2016) 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 latest by December 2016, and conflicting national standards
shall be withdrawn at the latest by December 2016.
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.
This document supersedes EN 754-8:2008.
The following technical modifications have been introduced during the revision:
— Subclause 3.2 Diameter - Round tube.
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;
— Part 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 tubes, tolerances on dimensions and form.
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,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This European Standard 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 circle (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-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 (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
Figure 2 — Circumscribing circle for other than round tube
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 754-1:2016, Aluminium and aluminium alloys — Cold drawn rod/bar and tube — Part 1: Technical
conditions for inspection and delivery
3 Tolerances on dimensions
3.1 General
When outside diameter OD, inside diameter ID, 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 only state two nominal dimensions on any given
order.
3.2 Diameter - Round tube
Mean diameter is defined as the average of two diameter measurements taken at right angles to each
other at any position along the length.
The maximum allowable deviation at any point from the specified diameter is the maximum difference
measured at any point along the length of the tube, i.e. it is inclusive of any ovality in the cross section.
The tolerances on diameter are specified in Table 1.
As detailed in EN 754-1:2016, Clause 4, if the original order does not make clear the nature of the
diameter tolerances required, the supplier shall interpret them as inclusive of any ovality (i.e. maximum
allowable deviation at any point from the specified diameter in Table 1). However, the diameter
tolerances may be expressed as both mean and inclusive of ovality if this is specifically requested by the
purchaser.
Table 1 — Tolerances on diameter for round tube
Dimensions in millimetres
Tolerance on diameter
Diameter (OD or ID)
Maximum allowable deviation of diameter
a
at any point from specified diameter
Maximum allowable deviation
of mean diameter from
Non-annealed
Tempers O,
Heat treated
e
Up to and
specified diameter
and non heat
Over H111 and
c
including
tube
b
Tx510
treated tube
≥ 3 8 d d d d
±0,04 ±0 08 ±0 12 ±0 25
, , ,
8 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
a
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 thickness over 2,0 % up to and including 2,5 % of outside diameter: 1,5 × tolerance;
— wall thickness over 1,5 % up to and including 2,0 % of outside diameter: 2,0 × tolerance;
— wall thickness over 1,0 % up to and including 1,5 % of outside diameter: 3,0 × tolerance;
— wall thickness over 0,5 % up to and including 1,0 % of outside d
...