SIST EN 755-7:2016
(Main)Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 7: Seamless tubes, tolerances on dimensions and form
Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 7: Seamless tubes, tolerances on dimensions and form
This European Standard specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded seamless 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 tube produced by the seamless die/mandrel method of extrusion. This standard applies to extruded seamless tube for general engineering applications only.
The temper designations used in this part are according to EN 515.
This European Standard does not apply to:
- extruded tubes produced by porthole/bridge method (EN 755-8),
- tubes delivered in coils (EN 13957),
- coiled tubes cut to length (EN 13957).
Aluminium und Aluminiumlegierungen - Stranggepresste Stangen, Rohre und Profile - Teil 7: Nahtlose Rohre, Grenzabmaße und Formtoleranzen
Diese Europäische Norm legt die Grenzabmaße und Formtoleranzen für stranggepresste nahtlose Rohre aus Alu¬minium und Aluminiumlegierungen mit einem Außendurchmesser (OD) (en: outside 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, geliefert in geraden Längen.
Diese Europäische Norm gilt nur für Rohre, die nach dem nahtlosen Strangpressverfahren hergestellt werden. Diese Norm gilt nur für stranggepresste nahtlose Rohre für allgemeine Anwendungen.
Die in diesem Dokument verwendeten Bezeichnungen der Werkstoffzustände entsprechen EN 515.
Diese Europäische Norm gilt nicht für:
— Rohre, die nach dem Strangpressverfahren mit Kammer /Brückenwerkzeug hergestellt werden (EN 755-8);
— 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 7 : Tubes filés sur aiguille, 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 produits à l’aide d’une méthode de filage sans soudure/sur aiguille. Le présent document s’applique aux tubes filés sur aiguille pour applications générales uniquement.
La désignation des états métallurgiques utilisés dans cette partie est conforme à l’EN 515.
La présente Norme européenne ne s’applique pas :
- aux tubes filés produits à l’aide d’une méthode de filage à pont (EN 755-8) ;
- 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 - 7. del: Nevarjene (narejene iz celega) cevi, tolerance mer in oblike
Ta evropski standard določa tolerance mer in oblike za iztiskane nevarjene 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 cevi, izdelane z metodo iztiskovanja s celim utopom/trnom. Ta standard se uporablja samo za iztiskane nevarjene cevi za splošno tehnično uporabo.
Oznake za popuščanje, uporabljene v tem delu, so skladne s standardom EN 515.
Ta evropski standard se ne uporablja za:
– cevi, izdelane z metodo iztiskovanja z večdelnimi matricami/mostičkom (EN 755-8),
– cevi, dobavljene v navojih (EN 13957),
– navojne cevi, razrezane po dolžini (EN 13957).
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 755-7:2016
01-september-2016
1DGRPHãþD
SIST EN 755-7:2008
Aluminij in aluminijeve zlitine - Iztiskane palice/drogovi, cevi in profili - 7. del:
Nevarjene (narejene iz celega) cevi, tolerance mer in oblike
Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 7: Seamless
tubes, tolerances on dimensions and form
Aluminium und Aluminiumlegierungen - Stranggepresste Stangen, Rohre und Profile -
Teil 7: Nahtlose Rohre, Grenzabmaße und Formtoleranzen
Aluminium et alliages d'aluminium - Barres, tubes et profilés filés - Partie 7 : Tubes filés
sur aiguille, tolérances sur dimensions et forme
Ta slovenski standard je istoveten z: EN 755-7:2016
ICS:
77.150.10 Aluminijski izdelki Aluminium products
SIST EN 755-7:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 755-7:2016
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SIST EN 755-7:2016
EN 755-7
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2016
EUROPÄISCHE NORM
ICS 77.150.10 Supersedes EN 755-7:2008
English Version
Aluminium and aluminium alloys - Extruded rod/bar, tube
and profiles - Part 7: Seamless tubes, tolerances on
dimensions and form
Aluminium et alliages d'aluminium - Barres, tubes et Aluminium und Aluminiumlegierungen -
profilés filés - Partie 7 : Tubes filés sur aiguille, Stranggepresste Stangen, Rohre und Profile - Teil 7:
tolérances sur dimensions et forme Nahtlose 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 755-7:2016 E
worldwide for CEN national Members.
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SIST EN 755-7:2016
EN 755-7:2016 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 5
3 Alloy groups . 5
4 Tolerances on dimensions . 5
4.1 General . 5
4.2 Diameter - Round tube . 5
4.3 Width, depth or width across flats - squares, rectangles, hexagons, octagons . 6
4.4 Wall thickness variation (eccentricity) . 7
4.5 Length . 8
4.6 Squareness of cut ends . 9
5 Tolerances on form . 9
5.1 General . 9
5.2 Straightness . 9
5.3 Convexity-Concavity . 10
5.4 Twist . 11
5.5 Angularity . 12
5.6 Corner and fillet radii . 13
5.7 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
2
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SIST EN 755-7:2016
EN 755-7:2016 (E)
European foreword
This document (EN 755-7:2016) 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 755-7:2008.
The following technical modifications have been introduced during the revision:
— Subclause 4.2, 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.
3
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SIST EN 755-7:2016
EN 755-7:2016 (E)
1 Scope
This European Standard specifies the tolerances on dimensions and form for aluminium and aluminium
alloy extruded seamless 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 tube produced by the seamless die/mandrel method of
extrusion. This standard applies to extruded seamless tube for general engineering applications only.
The temper designations used in this part are according to EN 515.
This European Standard does not apply to:
— extruded tubes produced by porthole/bridge method (EN 755-8),
— 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
4
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SIST EN 755-7:2016
EN 755-7:2016 (E)
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 Alloy groups
For the purposes of this European Standard, the alloys are distributed into two groups which
correspond to varying degrees of difficulty when manufacturing the products.
The division into group I and group II of the most commonly used general engineering alloys is
specified in Table 1. Grouping of other alloys is subject to agreement between supplier and purchaser.
Table 1 — Alloy groups
Group I EN AW-1050A, EN AW-1070A, EN AW-1200, EN AW-1350
EN AW-3102, EN AW-3003, EN AW-3103
EN AW-5005, EN AW-5005A
EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A,
EN AW-6106, EN AW-6008 EN AW-6014, EN AW-6060, EN AW-6360, EN AW-6063,
EN AW-6063A, EN AW-6463
Group II EN AW-2007, EN AW-2011, EN AW-2011A, EN AW-2014,
EN AW-2014A, EN AW-2017A, EN AW-2024, EN AW-2030
EN AW-5019, EN AW-5049, EN AW-5051A, EN AW-5251, EN AW-5052,
EN AW-5154A, EN AW-5454, EN AW-5754, EN AW-5083, EN AW-5086
EN AW-6110A, EN AW-6012, EN AW-6018, EN AW-6023, EN AW-6351, EN AW-6061,
EN AW-6261, EN AW-6262, EN AW-6081, EN AW-6082
EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020, EN AW-7021,
EN AW-7022, EN AW-7049A, EN AW-7075
4 Tolerances on dimensions
4.1 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.
4.2 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.
5
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SIST EN 755-7:2016
EN 755-7:2016 (E)
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 2.
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 2). However, the diameter
tolerances may be expressed as both mean and inclusive of ovality if this is specifically requested by the
purchaser.
Table 2 — Tolerances on diameter for round tube
Dimensions in millimetres
Tolerance on diameter
Diameter
Maximum allowable deviation of diameter at
(OD or ID)
a
any point from specified diameter
Maximum allowable deviation
of mean diameter from
Tempers O,
Up to and d Tempers F and Heat treated
specified diameter
Over H111 and
b
including H112 tube
Tx510
c c c c
≥ 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 sp
...
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aluminij in aluminijeve zlitine - Iztiskane palice/drogovi, cevi in profili - 7. del: Nevarjene (narejene iz celega) cevi, tolerance mer in oblikeAluminium und Aluminiumlegierungen - Stranggepresste Stangen, Rohre und Profile - Teil 7: Nahtlose Rohre, Grenzabmaße und FormtoleranzenAluminium et alliages d'aluminium - Barres, tubes et
profilés filés - Partie 7 : Tubes filés sur aiguille, tolérances sur dimensions et formeAluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 7: Seamless tubes, tolerances on dimensions and form77.150.10Aluminijski izdelkiAluminium productsICS:Ta slovenski standard je istoveten z:FprEN 755-7kSIST FprEN 755-7:2015en,fr,de01-november-2015kSIST FprEN 755-7:2015SLOVENSKI
STANDARD
kSIST FprEN 755-7:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 755-7
September
t r s w ICS
y yä s w rä s r Will supersede EN
y w wæ yã t r r zEnglish Version
Aluminium and aluminium alloand profiles æ Part
yã Seamless tubesá tolerances on dimensions and form Aluminium et alliages d 5aluminium æ Barresá tubes et
profilßs filßs æ Partie
y ã Tubes filßs sur aiguilleá tolßrances sur dimensions et forme
Aluminium und Aluminiumlegierungen æ Stranggepresste Stangená Rohre und Profile æ Teil
yã Nahtlose Rohreá Grenzabmaße und Formtoleranzen This draft European Standard is submitted to CEN members for unique acceptance procedureä It has been drawn up by the
If this draft becomes a European Standardá CEN members are bounwhich stipulate the conditions for giving this European Standard the status of a national standard without any alterationä
This draft European Standard was established by CEN in three ofer language made by translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
Recipients of this draft are invited to submitá with their commentsá notification of any relevant patent rights of which they are aware and to provide supporting documentationä
Warning ã This document is not a European Standardä It is distributed for review and commentsä It is subject to change without notice and shall not be referred to as a European Standardä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s w CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä FprEN
y w wæ yã t r s w EkSIST FprEN 755-7:2015
FprEN 755-7:2015 (E) 2 Contents Page European foreword . 3 1 Scope . 4 2 Normative references . 5 3 Alloy groups . 5 4 Tolerances on dimensions . 5 4.1 General . 5 4.2 Diameter - Round tube . 5 4.3 Width, depth or width across flats - squares, rectangles, hexagons, octagons . 6 4.4 Wall thickness variation (eccentricity) . 7 4.5 Length . 8 4.6 Squareness of cut ends . 9 5 Tolerances on form . 9 5.1 General . 9 5.2 Straightness . 9 5.3 Convexity-Concavity . 10 5.4 Twist . 11 5.5 Angularity . 12 5.6 Corner and fillet radii . 13 5.7 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 Bibliography . 17
kSIST FprEN 755-7:2015
FprEN 755-7:2015 (E) 3 European foreword This document (FprEN 755-7:2015) has been prepared by Technical Committee CEN/TC 132 “Aluminium and aluminium alloys”, the secretariat of which is held by AFNOR. This document is currently submitted to the Unique Acceptance Procedure. This document will supersede EN 755-7:2008. The following technical modifications have been introduced during the revision: — subclause 4.2
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 kSIST FprEN 755-7:2015
FprEN 755-7:2015 (E) 4 1 Scope This European Standard specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded seamless 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 tube produced by the seamless die/mandrel method of extrusion. This standard applies to extruded seamless tube for general engineering applications only. The temper designations used in this part are according to EN 515. This European Standard does not apply to: — extruded tubes produced by porthole/bridge method (EN 755-8), — 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 kSIST FprEN 755-7:2015
FprEN 755-7:2015 (E) 5 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. FprEN 755-1:2015, Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 1: Technical conditions for inspection and delivery 3 Alloy groups For the purposes of this European Standard, the alloys are distributed into two groups which correspond to varying degrees of difficulty when manufacturing the products. The division into group I and group II of the most commonly used general engineering alloys is specified in Table 1. Grouping of other alloys is subject to agreement between supplier and purchaser. Table 1 — Alloy groups Group I EN AW-1050A, EN AW-1070A, EN AW-1200, EN AW-1350 EN AW-3102, EN AW-3003, EN AW-3103 EN AW-5005, EN AW-5005A EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A,
EN AW-6106, EN AW-6008 EN AW-6014, EN AW-6060, EN AW-6360, EN AW-6063, EN AW-6063A, EN AW-6463 Group II EN AW-2007, EN AW-2011, EN AW-2011A, EN AW-2014, EN AW-2014A, EN AW-2017A, EN AW-2024, EN AW-2030 EN AW-5019, EN AW-5049, EN AW-5051A, EN AW-5251, EN AW-5052, EN AW-5154A, EN AW-5454, EN AW-5754, EN AW-5083, EN AW-5086 EN AW-6110A, EN AW-6012, EN AW-6018, EN AW-6023, EN AW-6351, EN AW-6061, EN AW-6261, EN AW-6262, EN AW-6081, EN AW-6082 EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020, EN AW-7021, EN AW-7022, EN AW-7049A, EN AW-7075 4 Tolerances on dimensions 4.1 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. 4.2 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 2. kSIST FprEN 755-7:2015
FprEN 755-7:2015 (E) 6 As detailed in FprEN 755-1:2015, 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 2). However, the diameter tolerances may be expressed as both mean and inclusive of ovality if this is specifically requested by the purchaser. Table 2 — Tolerances on diameter for round tube Dimensions in millimetres Diameter (OD or ID) Tolerance on diameter Maximum allowable deviation of mean diameter from specified diameter d Maximum allowable deviation of diameter at any point from specified diameter a Over Up to and including Tempers F and H112 Heat treated tube b Tempers O, H111 and Tx510
·
z 18 ± 0,25 c ± 0,40 c ± 0,60 c ± 1,5 c 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 x tolerance; — wall thickness over 1,5 % up to and including 2,0 % of outside diameter: 2,0 x tolerance; — wall thickness over 1,0 % up to and including 1,5 % of outside diameter: 3,0 x tolerance; — wall thickness over 0,5 % up to and including 1,0 % of
...
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