EN 10305-3:2023

SLOVENSKI STANDARD
01-februar-2024
Jeklene cevi za precizno uporabo - Tehnični dobavni pogoji - 3. del: Varjene
hladno oblikovane cevi
Steel tubes for precision applications - Technical delivery conditions - Part 3: Welded
cold sized tubes
Präzisionsstahlrohre - Technische Lieferbedingungen - Teil 3: Geschweißte
maßgewalzte Rohre
Tubes de précision en acier - Conditions techniques de livraison - Partie 3 : Tubes
soudés calibrés à froid
Ta slovenski standard je istoveten z: EN 10305-3:2023
ICS:
77.140.75 Jeklene cevi in cevni profili Steel pipes and tubes for
za posebne namene specific use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 10305-3
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2023
EUROPÄISCHE NORM
ICS 77.140.75 Supersedes EN 10305-3:2016, EN 10305-5:2016
English Version
Steel tubes for precision applications - Technical delivery
conditions - Part 3: Welded cold sized tubes
Tubes de précision en acier - Conditions techniques de Präzisionsstahlrohre - Technische Lieferbedingungen -
livraison - Partie 3 : Tubes soudés calibrés à froid Teil 3: Geschweißte maßgewalzte Rohre
This European Standard was approved by CEN on 8 October 2023.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10305-3:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Symbols. 8
5 Classification and designation . 8
5.1 Classification . 8
5.2 Designation . 8
6 Information to be supplied by the purchaser . 9
6.1 Mandatory information . 9
6.2 Options . 9
6.3 Examples of orders . 10
7 Manufacturing process . 11
7.1 Steelmaking process . 11
7.2 Tube manufacture, surface conditions and delivery conditions . 11
8 Requirements . 12
8.1 General . 12
8.2 Chemical composition . 12
8.3 Mechanical properties . 14
8.4 Appearance and internal soundness . 16
8.5 Dimensions and tolerances . 18
8.5.1 Circular tubes . 18
8.5.2 Square and rectangular tubes . 20
8.5.3 Tubes of other shapes . 24
8.5.4 Lengths . 24
8.5.5 Straightness . 25
8.5.6 Preparation of tube ends. 25
9 Inspection . 25
9.1 Types of inspection . 25
9.2 Inspection documents . 26
9.2.1 Types of inspection documents . 26
9.2.2 Content of inspection documents . 26
9.3 Summary of inspection and testing . 27
10 Sampling . 27
10.1 Test unit. 27
10.2 Preparation of samples and test pieces . 28
10.2.1 Selection and preparation of samples for product analysis . 28
10.2.2 Location, orientation and preparation of samples and test pieces for mechanical tests
............................................................................................................................................................................. 28
10.2.3 Test pieces for roughness measurement . 29
11 Test methods . 29
11.1 Chemical analysis . 29
11.2 Tensile test . 29
11.3 Flattening test . 30
11.4 Drift expanding test . 31
11.5 Dimensional inspection . 32
11.6 Roughness measurement . 32
11.7 Visual examination . 32
11.8 Non-destructive testing . 32
11.8.1 Testing for longitudinal imperfections . 32
11.8.2 Leak-tightness . 32
11.8.3 Testing of transverse strip end welds of coiled tubing for imperfections . 32
11.9 Retests, sorting and reprocessing . 32
12 Marking . 33
13 Protection and packaging . 33
Annex A ⁠⁠⁠⁠(informative) Available options in the EN 10305 series . 34
Annex B ⁠⁠⁠⁠(informative) Other innovative steel tubes available in the market - Single-phase
ferrite microstructure strengthened with nano-precipitates . 36
Bibliography . 38

European foreword
This document (EN 10305-3:2023) has been prepared by Technical Committee CEN/TC 459/SC 10 “Steel
tubes, and iron and steel fittings”, the secretariat of which is held by UNI.
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 June 2024, and conflicting national standards shall be
withdrawn at the latest by June 2024.
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.
This document supersedes EN 10305-3:2016 and EN 10305-5:2016.
In comparison with the previous edition EN 10305-3:2016 and EN 10305-5:2016, the following technical
changes have been made:
a) parts 3 and 5 have been merged so as to cover welded cold sized tubes of all shapes;
b) the dimensions, thickness ranges and tolerances have been aligned;
c) additional steel grades have been added;
d) editorial updates.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
The European Organization for Standardization (CEN) draws attention to the fact that it is claimed that
compliance with this document may involve the use of patents applied to two new steel grades described
in the informative Annex B of this document. CEN takes no position concerning the evidence, validity and
scope of these patent rights.
The holder of these patent rights has ensured CEN that they are willing to negotiate licenses, under
reasonable and non-discriminatory terms and condition
...