Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 8: Porthole tubes, tolerances on dimensions and form

This European Standard specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded porthole tubes with an outside diameter (OD) from 8 mm to 450 mm (round tube, see Figure 1) or with a cross section contained within a circumscribing circle (CD) from 10 mm to 350 mm (other than round tube, see Figure 2), supplied in straight lengths.
This European Standard only applies to extruded porthole tube for general engineering applications made in the following alloys:
-   EN AW-1050A, EN AW-1200, EN AW-1350;
-   EN AW-3003, EN AW-3103;
-   EN AW-5005, EN AW-5005A, EN AW-5049, EN AW-5051A, EN AW-5251, EN AW-5052;
-   EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A, EN AW-6008, EN AW-6110A, EN AW-6012, EN AW-6014, EN AW-6018, EN AW-6351, EN AW-6060, EN AW-6360, EN AW-6061, EN AW-6261, EN AW-6262, EN AW-6262A, EN AW-6063, EN AW-6063A, EN AW-6463, EN AW-6065, EN AW-6081, EN AW-6082; EN AW-6182;
-   EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020.
The temper designations used in this part are according to EN 515.
This European Standard only applies to tube produced by the tube porthole/bridge method.
This European Standard does not apply to:
-   extruded tubes produced by the seamless, die/mandrel method (EN 755 7),
-   tubes delivered in coils (EN 13957),
-   coiled tubes cut to length (EN 13957).
(...)

Aluminium und Aluminiumlegierungen - Stranggepresste Stangen, Rohre und Profile - Teil 8: Mit Kammerwerkzeug stranggepresste Rohre, Grenzabmaße und Formtoleranzen

Diese Europäische Norm legt die Grenzabmaße und Formtoleranzen für mit Kammerwerkzeug strang-gepresste Rohre aus Aluminium und Aluminiumlegierungen mit einem Außendurchmesser (OD) (en: outer diameter) von 8 mm bis 450 mm (Rundrohre, siehe Bild 1) oder mit einem Querschnitt, der in einem Umschlingungskreis (CD) (en: circumscribing circle) von 10 mm bis 350 mm enthalten ist (andere als Rundrohre, siehe Bild 2), fest. Sie werden in geraden Längen geliefert.
Diese Europäische Norm gilt nur für mit Kammerwerkzeug stranggepresste und aus nachfolgenden Legierungen hergestellte Rohre für allgemeine Anwendungen:
—   EN AW-1050A, EN AW-1200, EN AW-1350;
—   EN AW-3003, EN AW-3103;
—   EN AW-5005, EN AW-5005A, EN AW-5049, EN AW-5051A, EN AW-5251, EN AW-5052;
—   EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A, EN AW-6008, EN AW-6110A, EN AW 6012, EN AW-6014, EN AW-6018, EN AW-6351, EN AW-6060, EN AW-6360, EN AW-6061, EN AW-6261, EN AW-6262, EN AW-6262A, EN AW-6063, EN AW-6063A, EN AW-6463, EN AW-6065, EN AW-6081, EN AW-6082, EN AW-6182;
—   EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020.
Die in diesem Dokument verwendeten Bezeichnungen der Werkstoffzustände entsprechen EN 515.
Diese Europäische Norm gilt nur für Rohre, die nach dem Strangpressverfahren mit Kammer-/Brücken¬werkzeug hergestellt werden.
Diese Europäische Norm gilt nicht für:
—   Rohre, die nach dem nahtlosen Strangpressverfahren hergestellt werden (EN 755-7);
—   Rohre, die in Ringen geliefert werden (EN 13957);
Rohre in Ringen, die auf Länge geschnitten werden (EN 13957).

Aluminium et alliages d'aluminium - Barres, tubes et profilés filés - Partie 8 : Tubes filés à pont, tolérances sur dimensions et forme

La présente Norme européenne spécifie les tolérances sur dimensions et forme des tubes filés sur aiguille en aluminium et alliages d’aluminium avec un diamètre extérieur (OD) de 8 mm à 450 mm (tube rond, voir la Figure 1) ou avec une section transversale contenue dans le cercle circonscrit (CD) de 10 mm à 350 mm (autre que tube rond, voir la Figure 2), fournis en longueurs droites.
La présente Norme européenne ne s’applique qu’aux tubes étirés pour applications générales, fabriqués dans les alliages suivants :
-   EN AW-1050A, EN AW-1200, EN AW-1350 ;
-   EN AW-3003, EN AW-3103 ;
-   EN AW-5005, EN AW-5005A, EN AW-5049, EN AW-5051A, EN AW-5251, EN AW-5052 ;
-   EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A, EN AW-6008, EN AW-6110A, EN AW-6012, EN AW-6014, EN AW-6018, EN AW-6351, EN AW-6060, EN AW-6360, EN AW-6061, EN AW-6261, EN AW-6262, EN AW-6262A, EN AW-6063, EN AW-6063A, EN AW-6463, EN AW-6065, EN AW-6081, EN AW-6082 ; EN AW-6182 ;
-   EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020.
La désignation des états métallurgiques utilisés dans cette partie est conforme à l’EN 515.
La présente Norme européenne ne s’applique qu’aux tubes produits à l’aide d’une méthode de filage à pont.
La présente Norme européenne ne s’applique pas :
-   aux tubes filés produits à l’aide d’une méthode de filage sur aiguille (EN 755-7) ;
-   aux tubes livrés en couronnes (EN 13957) ;
-   aux tubes en couronnes découpés à longueur (EN 13957).
(...)

Aluminij in aluminijeve zlitine - Iztiskane palice/drogovi, cevi in profili - 8. del: Z večdelnimi matricami iztiskane cevi, tolerance mer in oblike

Ta evropski standard določa tolerance mer in oblike za z večdelnimi matricami iztiskane cevi iz aluminija in aluminijeve zlitine z zunanjim premerom (OD) od 8 mm do 450 mm (okrogla cev, glej sliko 1) ali s presekom v odprtini (CD) velikosti od 10 mm do 350 mm (neokrogla cev, glej sliko 2), dobavljene v ravnih presekih.
Ta evropski standard se uporablja samo za z večdelnimi matricami iztiskane cevi za splošno tehnično uporabo, izdelane iz naslednjih zlitin:
– EN AW-1050A, EN AW-1200, EN AW-1350;
– EN AW-3003, EN AW-3103;
– EN AW-5005, EN AW-5005A, EN AW-5049, EN AW-5051A, EN AW-5251, EN AW-5052;
– EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A, EN AW-6008, EN AW-6110A, EN AW-6012, EN AW-6014, EN AW-6018, EN AW-6351, EN AW-6060, EN AW-6360, EN AW-6061, EN AW-6261, EN AW-6262, EN AW-6262A, EN AW-6063, EN AW-6063A, EN AW-6463, EN AW-6065, EN AW-6081, EN AW-6082; EN AW-6182,
– EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020.
Oznake za popuščanje, uporabljene v tem delu, so skladne s standardom EN 515.
Ta evropski standard se uporablja samo za cevi, izdelane z metodo iztiskovanja z večdelnimi matricami/mostičkom.
Ta evropski standard se ne uporablja za:
– cevi, izdelane z metodo iztiskovanja s celim utopom/trnom (EN 755-7),
– cevi, dobavljene v navojih (prEN 13957),
– navojne cevi, razrezane po dolžini (prEN 13957).

General Information

Status
Published
Public Enquiry End Date
09-Dec-2015
Publication Date
04-Jul-2016
ICS
77.150.10 - Aluminium products
Technical Committee
INEK - Nonferrous metals
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
22-Jun-2016
Due Date
27-Aug-2016
Completion Date
05-Jul-2016
Ref Project
EN 755-8:2016 - Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 8: Porthole tubes, tolerances on dimensions and form

Relations

Replaces
SIST EN 755-8:2008 - Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 8: Porthole tubes, tolerances on dimensions and form
Effective Date
01-Sep-2016

Overview

EN 755-8:2016 - "Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 8: Porthole tubes, tolerances on dimensions and form" is a CEN European Standard that defines dimensional and form tolerances for extruded porthole (bridge) aluminium tubes supplied in straight lengths. The standard covers round tubes with outside diameters (OD) from 8 mm to 450 mm and non‑round sections contained within a circumscribing circle (CD) from 10 mm to 350 mm. It applies only to tubes produced by the porthole/bridge extrusion method and to the specific EN AW alloy grades listed in the scope. Temper designations follow EN 515.

Key topics

EN 755-8:2016 sets out technical requirements and measurement rules, including:

  • Scope and applicable alloys: explicit list of EN AW aluminium alloys for general engineering use.
  • Tolerances on dimensions:
    • Diameter (OD/ID) rules, distinction between mean diameter and tolerances inclusive of ovality.
    • Width, depth and width‑across‑flats tolerances for non‑round profiles (CD based).
    • Rules for specifying only two of OD, ID and wall thickness (t) - purchaser must state two nominal dimensions.
  • Wall thickness variation (eccentricity):
    • Tolerance tables for round and other than round tubes, with guidance depending on how the tube is specified (OD×t, ID×t or OD×ID). Annex A provides explanatory notes.
  • Length and squareness:
    • Fixed‑length tolerance tables and requirements for squareness of cut ends.
  • Tolerances on form:
    • Straightness, convexity/concavity, twist, angularity, corner and fillet radii, and allowable dent depth.
  • Measurement and interpretation guidance: normative references and how to interpret tolerances when not explicitly requested by the purchaser.

Applications and who uses it

EN 755-8 is used by:

  • Extrusion manufacturers and suppliers to define acceptable production tolerances for porthole tubes.
  • Purchasers and procurement teams when specifying tube geometry and delivery requirements.
  • Quality assurance and inspection labs for dimensional checks and conformity assessment.
  • Design and mechanical engineers specifying tubing for general engineering applications (structural, heat‑exchanger frames, assembly components) who need standardized tolerances for fit and function.

The standard ensures clear, enforceable tolerances that reduce disputes and support interchangeability in production and supply chains.

Related standards

  • EN 755-1 (Technical conditions for inspection and delivery)
  • EN 755 series (Parts 2–9 cover bars, profiles and seamless tubes)
  • EN 755-7 (Seamless, die/mandrel tubes - excluded)
  • EN 13957 (Coiled tubes - excluded)
  • EN 515 (Temper designations)

Keywords: EN 755-8:2016, porthole tubes, aluminium extruded, tolerances, OD, wall thickness, eccentricity, CEN, EN AW alloys.

Frequently Asked Questions

SIST EN 755-8:2016 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 8: Porthole tubes, tolerances on dimensions and form". This standard covers: This European Standard specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded porthole tubes with an outside diameter (OD) from 8 mm to 450 mm (round tube, see Figure 1) or with a cross section contained within a circumscribing circle (CD) from 10 mm to 350 mm (other than round tube, see Figure 2), supplied in straight lengths. This European Standard only applies to extruded porthole tube for general engineering applications made in the following alloys: - EN AW-1050A, EN AW-1200, EN AW-1350; - EN AW-3003, EN AW-3103; - EN AW-5005, EN AW-5005A, EN AW-5049, EN AW-5051A, EN AW-5251, EN AW-5052; - EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A, EN AW-6008, EN AW-6110A, EN AW-6012, EN AW-6014, EN AW-6018, EN AW-6351, EN AW-6060, EN AW-6360, EN AW-6061, EN AW-6261, EN AW-6262, EN AW-6262A, EN AW-6063, EN AW-6063A, EN AW-6463, EN AW-6065, EN AW-6081, EN AW-6082; EN AW-6182; - EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020. The temper designations used in this part are according to EN 515. This European Standard only applies to tube produced by the tube porthole/bridge method. This European Standard does not apply to: - extruded tubes produced by the seamless, die/mandrel method (EN 755 7), - tubes delivered in coils (EN 13957), - coiled tubes cut to length (EN 13957). (...)

This European Standard specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded porthole tubes with an outside diameter (OD) from 8 mm to 450 mm (round tube, see Figure 1) or with a cross section contained within a circumscribing circle (CD) from 10 mm to 350 mm (other than round tube, see Figure 2), supplied in straight lengths. This European Standard only applies to extruded porthole tube for general engineering applications made in the following alloys: - EN AW-1050A, EN AW-1200, EN AW-1350; - EN AW-3003, EN AW-3103; - EN AW-5005, EN AW-5005A, EN AW-5049, EN AW-5051A, EN AW-5251, EN AW-5052; - EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A, EN AW-6008, EN AW-6110A, EN AW-6012, EN AW-6014, EN AW-6018, EN AW-6351, EN AW-6060, EN AW-6360, EN AW-6061, EN AW-6261, EN AW-6262, EN AW-6262A, EN AW-6063, EN AW-6063A, EN AW-6463, EN AW-6065, EN AW-6081, EN AW-6082; EN AW-6182; - EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020. The temper designations used in this part are according to EN 515. This European Standard only applies to tube produced by the tube porthole/bridge method. This European Standard does not apply to: - extruded tubes produced by the seamless, die/mandrel method (EN 755 7), - tubes delivered in coils (EN 13957), - coiled tubes cut to length (EN 13957). (...)

SIST EN 755-8:2016 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.

SIST EN 755-8:2016 has the following relationships with other standards: It is inter standard links to SIST EN 755-8:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase SIST EN 755-8:2016 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.

Standards Content (Sample)


SLOVENSKI STANDARD
01-september-2016
1DGRPHãþD
SIST EN 755-8:2008
$OXPLQLMLQDOXPLQLMHYH]OLWLQH,]WLVNDQHSDOLFHGURJRYLFHYLLQSURILOLGHO=
YHþGHOQLPLPDWULFDPLL]WLVNDQHFHYLWROHUDQFHPHULQREOLNH
Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 8: Porthole
tubes, tolerances on dimensions and form
Aluminium und Aluminiumlegierungen - Stranggepresste Stangen, Rohre und Profile -
Teil 8: Mit Kammerwerkzeug stranggepresste Rohre, Grenzabmaße und Formtoleranzen
Aluminium et alliages d'aluminium - Barres, tubes et profilés filés - Partie 8 : Tubes filés à
pont, tolérances sur dimensions et forme
Ta slovenski standard je istoveten z: EN 755-8:2016
ICS:
77.150.10 Aluminijski izdelki Aluminium products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 755-8
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2016
EUROPÄISCHE NORM
ICS 77.150.10 Supersedes EN 755-8:2008
English Version
Aluminium and aluminium alloys - Extruded rod/bar, tube
and profiles - Part 8: Porthole tubes, tolerances on
dimensions and form
Aluminium et alliages d'aluminium - Barres, tubes et Aluminium und Aluminiumlegierungen -
profilés filés - Partie 8 : Tubes filés à pont, tolérances Stranggepresste Stangen, Rohre und Profile - Teil 8:
sur dimensions et forme Mit Kammerwerkzeug 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 755-8:2016 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 tube . 14
Annex A (informative) Wall thickness variation (eccentricity) . 15
A.1 General . 15
A.2 Specifying round tube sizes and tolerances . 15
A.2.1 General . 15
A.2.2 Wall thickness variation for tubes specified as OD × t or ID × t . 15
A.2.3 Wall thickness variation for tubes specified as OD × ID . 16
Bibliography . 17

European foreword
This document (EN 755-8:2016) 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 755-8:2008.
The following technical modifications have been introduced during the revision:
— Figure 1;
— Subclause 3.2 Diameter - Round tube.
EN 755 comprises the following parts under the general title Aluminium and aluminium alloys —
Extruded rod/bar, tube and profiles:
— 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;
— Part 9: Profiles, 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 extruded porthole tubes with an outside diameter (OD) from 8 mm to 450 mm (round tube,
see Figure 1) or with a cross section contained within a circumscribing circle (CD) from 10 mm to
350 mm (other than round tube, see Figure 2), supplied in straight lengths.
This European Standard only applies to extruded porthole tube for general engineering applications
made in the following alloys:
— EN AW-1050A, EN AW-1200, EN AW-1350;
— EN AW-3003, EN AW-3103;
— EN AW-5005, EN AW-5005A, EN AW-5049, EN AW-5051A, EN AW-5251, EN AW-5052;
— EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A, EN AW-6008, EN AW-6110A, EN AW-
6012, EN AW-6014, EN AW-6018, EN AW-6351, EN AW-6060, EN AW-6360, EN AW-6061, EN AW-
6261, EN AW-6262, EN AW-6262A, EN AW-6063, EN AW-6063A, EN AW-6463, EN AW-6065,
EN AW-6081, EN AW-6082; EN AW-6182;
— EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020.
The temper designations used in this part are according to EN 515.
This European Standard only applies to tube produced by the tube porthole/bridge method.
This European Standard does not apply to:
— extruded tubes produced by the seamless, die/mandrel method (EN 755-7),
— tubes delivered in coils (EN 13957),
— coiled tubes cut to length (EN 13957).

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 755-1:2016, Aluminium and aluminium alloys — Extruded rod/bar, tube and profiles — 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 of diameter at any point from the specified diameter is the maximum
difference measured at any point along the length of the tube ie it is inclusive of any ovality in the cross
section.
The tolerances on diameter are specified in Table 1.
As detailed in EN 755-1:2016, 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
Maximum allowable deviation of diameter at any
(OD or ID)
a
point from specified diameter
Maximum allowable deviation of
mean diameter from specified
Non-annealed
f
Up to and Heat treated
diameter
d
Over and non heat Annealed tube
c
including tube
b
treated tube
e e e e
≥ 8 18 ±0,25 ±0,40 ±0,60 ±1,5
18 30 ±0,30 ±0,50 ±0,70 ±1,8
30 50 ±0,35 ±0,60 ±0,90 ±2,2
50 80 ±0,40 ±0,70 ±1,1 ±2,6
80 120 ±0,60 ±0,90 ±1,4 ±3,6
120 200 ±0,90 ±1,4 ±2,0 ±5,0
200 350 ±1,4 ±1,9 ±3,0 ±7,6
350 450 ±1,9 ±2,8 ±4,0 ±10,0
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 diameter: 4,0 × tolerance.
b
Applies to all alloys in F or H112 tempers.
c
Applies to all alloys in T4, T5, T6, T64, T66 and Tx511 tempers.
d
Applies to all alloys in O, H11
...

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This article discusses the specifications outlined in the European Standard SIST EN 755-8:2016 for aluminium and aluminium alloy extruded porthole tubes. The standard focuses on the tolerances on dimensions and form for these tubes, which have an outside diameter ranging from 8 mm to 450 mm for round tubes or a cross section contained within a circumscribing circle ranging from 10 mm to 350 mm for non-round tubes. These tubes are supplied in straight lengths and are used in general engineering applications. The standard also lists the specific alloys that are covered by this standard. It is important to note that this standard only applies to tubes produced by the porthole/bridge method and does not apply to tubes produced by the seamless, die/mandrel method or those delivered in coils or cut to length.

この記事は、SIST EN 755-8:2016というヨーロッパの規格について述べています。この規格は、外径（OD）が8mmから450mmまでのアルミニウムおよびアルミニウム合金の押出しポートホールチューブの寸法と形状における許容差を定めています。丸管の場合は図1のように、他の形状のチューブの場合は外接円（CD）内に収まる断面で、10mmから350mmまでの範囲です。これらのチューブは直線状で供給され、一般的なエンジニアリング用途で使用されます。この規格は、以下の合金で作られた押出しチューブにのみ適用されます。 - EN AW-1050A、EN AW-1200、EN AW-1350; - EN AW-3003、EN AW-3103; - EN AW-5005、EN AW-5005A、EN AW-5049、EN AW-5051A、EN AW-5251、EN AW-5052; - EN AW-6101A、EN AW-6101B、EN AW-6005、EN AW-6005A、EN AW-6008、EN AW-6110A、EN AW-6012、EN AW-6014、EN AW-6018、EN AW-6351、EN AW-6060、EN AW-6360、EN AW-6061、EN AW-6261、EN AW-6262、EN AW-6262A、EN AW-6063、EN AW-6063A、EN AW-6463、EN AW-6065、EN AW-6081、EN AW-6082; EN AW-6182, - EN AW-7003、EN AW-7005、EN AW-7108、EN AW-7108A、EN AW-7020. この規格で使用される熱処理の指定は、EN 515に準拠しています。 この規格は、ポートホール/ブリッジ法で生産されたチューブにのみ適用され、シームレス、ダイ/マンドレル法で生産されたチューブやコイルで納品されるチューブ、および長さに合わせて切断されたコイルチューブには適用されません。

이 기사는 유럽 표준인 SIST EN 755-8:2016에 포함된 알루미늄 및 알루미늄 합금 압출 포트홀 튜브의 사이즈와 형상에 대한 허용 오차에 대해 다루고 있다. 이 표준은 외부 지름이 8mm에서 450mm인 원형 튜브 (Figure 1 참조) 또는 외경을 감싸는 원에 포함 된 단면이 10mm에서 350mm인 타원 형태의 튜브 (Figure 2 참조)에 적용되며, 곧장 길이로 제공된다. 이 표준은 다음 합금을 사용하여 제조된 일반 공업용 압출 포트홀 튜브에만 적용된다: - EN AW-1050A, EN AW-1200, EN AW-1350; - EN AW-3003, EN AW-3103; - EN AW-5005, EN AW-5005A, EN AW-5049, EN AW-5051A, EN AW-5251, EN AW-5052; - EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A, EN AW-6008, EN AW-6110A, EN AW-6012, EN AW-6014, EN AW-6018, EN AW-6351, EN AW-6060, EN AW-6360, EN AW-6061, EN AW-6261, EN AW-6262, EN AW-6262A, EN AW-6063, EN AW-6063A, EN AW-6463, EN AW-6065, EN AW-6081, EN AW-6082; EN AW-6182, - EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020. 이 표준에서 사용된 경도 표기는 EN 515에 따른 것이다. 이 표준은 튜브 포트홀/브릿지 방법으로 생산된 튜브에만 적용된다. 이 표준은 다음에는 적용되지 않는다: - 시퀀스, 다이/맨델 방법으로 생산된 압출 튜브 (EN 755-7), - 코일로 공급된 튜브 (prEN 13957), - 길이에 맞게 잘라진 튜브 (prEN 13957).