SIST EN 12735-2:2025

SLOVENSKI STANDARD
01-januar-2025
Baker in bakrove zlitine - Nevarjene okrogle bakrene cevi za hladilno in klimatsko
tehniko - 2. del: Cevi za naprave in aparate
Copper and copper alloys - Seamless, round tubes for air conditioning and refrigeration -
Part 2: Tubes for equipment
Kupfer und Kupferlegierungen - Nahtlose Rundrohre für die Kälte- und Klimatechnik -
Teil 2: Rohre für Apparate
Cuivre et alliages de cuivre - Tubes ronds sans soudure pour l'air conditionné et la
réfrigération - Partie 2: Tubes pour le matériel
Ta slovenski standard je istoveten z: EN 12735-2:2024
ICS:
23.040.15 Cevi iz neželeznih kovin Non-ferrous metal pipes
77.150.30 Bakreni izdelki Copper products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 12735-2
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2024
EUROPÄISCHE NORM
ICS 23.040.15 Supersedes EN 12735-2:2016
English Version
Copper and copper alloys - Seamless, round tubes for air
conditioning and refrigeration - Part 2: Tubes for
equipment
Cuivre et alliages de cuivre - Tubes ronds sans soudure Kupfer und Kupferlegierungen - Nahtlose Rundrohre
pour l'air conditionné et la réfrigération - Partie 2: für die Kälte- und Klimatechnik - Teil 2: Rohre für
Tubes pour le matériel Apparate
This European Standard was approved by CEN on 30 September 2024.

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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12735-2:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Designations . 9
4.1 Material . 9
4.1.1 General. 9
4.1.2 Symbol . 9
4.1.3 Number . 9
4.2 Material condition . 9
4.3 Product . 9
5 Ordering information . 10
6 Requirements . 11
6.1 Composition . 11
6.2 Mechanical properties and grain size . 11
6.3 Dimensions and tolerances for smooth tubes . 12
6.3.1 General. 12
6.3.2 Nominal dimensions . 12
6.3.3 Tolerances on mean outside diameter . 14
6.3.4 Tolerances on wall thickness . 15
6.3.5 Tolerances on the mass for tubes supplied in coils . 16
6.3.6 Tolerances on length for tubes supplied in straight lengths . 16
6.3.7 Tolerances of form . 17
6.4 Dimensions and tolerances for inner finned tubes . 18
6.4.1 General. 18
6.4.2 Dimensions for inner finned tubes . 18
6.4.3 Tolerances on mean outside diameter . 19
6.4.4 Tolerances on wall thickness . 19
6.4.5 Tolerances on fin height, number of fins, shape of in and spiral pitch. 19
6.4.6 Tolerances on mass for tubes supplied in coils . 19
6.4.7 Tolerances on length for tubes supplied in straight lengths . 19
6.4.8 Tolerances of form . 19
6.5 Drift expanding . 19
6.6 Freedom from defects . 20
6.6.1 General. 20
6.6.2 Straight tubes . 20
6.6.3 Coiled tubes . 20
6.7 Surface quality . 21
7 Sampling . 21
8 Test methods . 21
8.1 Analysis . 21
8.2 Tensile test . 21
8.3 Hardness test . 22
8.4 Estimation of average grain size . 22
8.5 Drift expanding test . 22
8.6 Carbon content test . 22
8.7 Freedom from defects test . 22
8.8 Retests . 22
9 Certificate of compliance and inspection documentation . 23
9.1 Certificate of compliance . 23
9.2 Inspection documentation . 23
10 Packaging, marking and form of delivery . 23
10.1 Packaging and marking . 23
10.2 Form of delivery . 23
10.2.1 Coils . 23
10.2.2 Straight lengths . 24
Annex A (normative) Freedom from defects test . 25
Annex ZA (informative) Relationship between this document and the essential requirements of
Directive 2014/68/EU (Pressure Equipment Directive) aimed to be covered . 27
Bibliography . 28

European foreword
This document (EN 12735-2:2024) has been prepared by Technical Committee CEN/TC 133 “Copper and
copper alloys”, the secretariat of which is held by DIN.
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 May 2025 and conflicting national standards shall be
withdrawn at the latest by May 2025.
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 12735-2:2016.
a) NOTE in Scope modified;
b) Normative references updated;
c) Diameter added in Clause 5, Example 1 and Example 2;
d) Table 1 modified;
e) Conditions corrected in Table 3, footnote c;
f) Tolerance on mean wall thickness in Table 5 (0,06 was 0,08) amended;
g) Minimum diameter reduced to 3,97 in Table 8;
h) 6.4.4 and 6.4.5 amended;
i) 6.4.6, 6.4.7, 6.4.8 added;
j) 6.5 and 6.6.1 amended;
k) 8.4 amended;
l) Coil mass range and nominal width range extended in Table 12;
m) Annex ZA amended;
n) Several editorial amendments.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
EN 12735, Copper and copper alloys — Seamless, round tubes for air conditioning and refrigeration is
currently composed of the following parts:
— Part 1: Tubes for piping systems
— Part 2: Tubes for equipment
This is one of a series of European Standards for copper and copper alloy
...