prEN 10253-1

SLOVENSKI STANDARD
01-marec-2025
Cevni fitingi za soležne zvare - 1. del: Ogljikovo jeklo za splošno uporabo in brez
posebnih zahtev kontrole
Butt-welding pipe fittings - Part 1: Wrought carbon steel for general use and without
specific inspection requirements
Formstücke zum Einschweißen - Teil 1: Unlegierter Stahl für allgemeine Anwendungen
und ohne besondere Prüfanforderungen
Raccords à souder bout à bout - Partie 1: Acier au carbone pour usages généraux et
sans contrôle spécifique
Ta slovenski standard je istoveten z: prEN 10253-1
ICS:
23.040.40 Kovinski fitingi Metal fittings
77.140.45 Nelegirana jekla Non-alloyed steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2025
ICS 23.040.40 Will supersede EN 10253-1:1999
English Version
Butt-welding pipe fittings - Part 1: Wrought carbon steel
for general use and without specific inspection
requirements
Raccords à souder bout à bout - Partie 1: Acier au Formstücke zum Einschweißen - Teil 1: Unlegierter
carbone pour usages généraux et sans contrôle Stahl für allgemeine Anwendungen und ohne
spécifique besondere Prüfanforderungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 459/SC 10.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10253-1:2025 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 and abbreviations . 8
5 Classification and designation . 9
5.1 Classification of grades . 9
5.2 Designation of steel grades . 9
5.3 Designation of fittings . 9
5.3.1 General . 9
5.3.2 Elbows and return bends . 9
5.3.3 Reducers . 9
5.3.4 Tees . 9
5.3.5 Caps . 9
6 Information to be supplied by the purchaser . 10
6.1 Mandatory information . 10
6.2 Options . 10
6.3 Examples of an order . 10
6.3.1 Example 1 . 10
6.3.2 Example 2 . 10
6.3.3 Example 3 . 10
7 Resistance to internal pressure . 11
8 Manufacturing process . 11
8.1 Steelmaking process . 11
8.2 Product making process for fittings and heat treatment . 11
8.2.1 Product making process . 11
8.2.2 Welding . 12
8.2.3 Heat treatment condition . 12
9 Technical requirements. 12
9.1 General . 12
9.2 Chemical composition . 12
9.3 Mechanical properties . 13
9.4 Weldability . 13
10 Appearance (delivery conditions) . 13
10.1 Definitions of surface imperfections . 13
10.2 Appearance . 14
11 Dimensions and tolerances . 15
11.1 Dimensions . 15
11.1.1 General . 15
11.1.2 Elbows . 15
11.1.3 Tees . 16
11.1.4 Reducers . 17
11.1.5 Caps . 19
11.1.6 Diameters and wall thicknesses . 19
11.2 Dimensional tolerances . 20
11.2.1 Diameter . 20
11.2.2 Out of roundness . 20
11.2.3 Wall thickness tolerances . 21
11.2.4 Tolerances on specific dimensions and form . 21
11.3 Performance of the end bevelling . 22
12 Inspection . 23
12.1 Type of inspection . 23
12.2 Inspection documents . 23
12.2.1 Type of inspection documents . 23
12.2.2 Content of inspection documents . 23
12.3 Summary of inspection and testing . 24
13 Sampling . 24
13.1 Frequency of tests. 24
13.2 Preparation of samples and test pieces for mechanical tests. 24
14 Test methods . 25
14.1 Chemical analysis . 25
14.2 Tensile test on the base material at room temperature . 25
14.3 Hardness test . 25
14.4 Dimensional testing . 25
14.5 Visual testing (VT) . 25
14.6 Non-destructive testing (NDT) . 26
14.6.1 Personnel . 26
14.6.2 NDT of the weld . 26
15 Marking . 26
16 Protection and packaging .
...