EN 12735-2:2024

Copper and copper alloys - Seamless, round tubes for air conditioning and refrigeration - Part 2: Tubes for equipment

This document specifies the requirements, sampling, test methods and conditions of delivery for seamless round copper tubes, smooth or inner finned, used for heat exchangers and their internal connecting pipes in the manufacturing of refrigeration and air conditioning equipment.
It is applicable to tubes with an outside diameter from 3,97 mm up to and including 219 mm.
NOTE   The tubes are supplied in straight length or as coils.

Kupfer und Kupferlegierungen - Nahtlose Rundrohre für die Kälte- und Klimatechnik - Teil 2: Rohre für Apparate

Dieses Dokument legt die Anforderungen, Probenentnahme, Prüfverfahren und die Lieferbedingungen für nahtlose Rundrohre aus Kupfer mit glatter oder berippter Innenoberfläche fest, die für Wärmeaustauscher und ihre inneren Verbindungsrohre bei der Herstellung von Apparaten der Kälte- und Klimatechnik verwendet werden.
Es ist anwendbar für Rohre mit einem Außendurchmesser von 3,97 mm bis 219 mm.
ANMERKUNG   Die Rohre werden in geraden Längen oder als Spulen geliefert.

Cuivre et alliages de cuivre - Tubes ronds sans soudure pour l'air conditionné et la réfrigération - Partie 2: Tubes pour le matériel

Le présent document spécifie les exigences, le mode d’échantillonnage, les méthodes d’essai et les conditions de livraison applicables aux tubes ronds sans soudure en cuivre lisses ou à ailettes internes, utilisés pour les échangeurs thermiques et leurs raccordements intérieurs dans la fabrication des matériels de réfrigération et de conditionnement d’air.
Il s’applique aux tubes ayant un diamètre extérieur de 3,97 mm à 219 mm inclus.
NOTE   Ces tubes sont livrés en longueurs droites ou en couronnes.

Baker in bakrove zlitine - Nevarjene okrogle bakrene cevi za hladilno in klimatsko tehniko - 2. del: Cevi za naprave in aparate

General Information

• Status: Not Published
• Publication Date: 05-Nov-2024
• ICS: 23.040.15 - Non-ferrous metal pipes
• Technical Committee: CEN/TC 133 - Copper and copper alloys
• Drafting Committee: CEN/TC 133/WG 3 - Copper tubes (installation and industrial)
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Start Date: 30-Sep-2024
• Due Date: 07-Jan-2025
• Completion Date: 30-Sep-2024
• Directive: 2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Mandate: M/601 - COMMISSION IMPLEMENTING DECISION of 1.3.2024 on a standardisation request to the European Committee for Standardization and the European Committee for Electrotechnical Standardization as regards pressure equipment and assemblies in support of Directive 2014/68/EU of the European Parliament and of the Council
• Ref Project: kSIST FprEN 12735-2:2024 - Copper and copper alloys - Seamless, round tubes for air conditioning and refrigeration - Part 2: Tubes for equipment

Relations

• Revises: EN 12735-2:2016 - Copper and copper alloys - Seamless, round tubes for air conditioning and refrigeration - Part 2: Tubes for equipment
• Effective Date: 21-Aug-2019

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 12735-2:2023
01-maj-2023
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: prEN 12735-2
ICS:
23.040.15 Cevi iz neželeznih kovin Non-ferrous metal pipes
77.150.30 Bakreni izdelki Copper products
oSIST prEN 12735-2:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 12735-2:2023
oSIST prEN 12735-2:2023
DRAFT
EUROPEAN STANDARD
prEN 12735-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2023
ICS 23.040.15 Will supersede 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 draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 133.
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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12735-2:2023 E
worldwide for CEN national Members.

oSIST prEN 12735-2:2023
prEN 12735-2:2023 (E)
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 . 13
6.3.4 Tolerances on wall thickness . 14
6.3.5 Tolerances on the mass for tubes supplied in coils . 15
6.3.6 Tolerances on length for tubes supplied in straight lengths . 15
6.3.7 Tolerances of form . 16
6.4 Dimensions and tolerances for inner finned tubes . 17
6.4.1 General. 17
6.4.2 Dimensions for inner finned tubes . 17
6.4.3 Tolerances on mean outside diameter . 18
6.4.4 Tolerances on wall thickness . 18
6.4.5 Tolerances on fin height, number of fins, shape of in and spiral pitch. 18
6.4.6 Tolerances on mass for tubes supplied in coils . 18
6.4.7 Tolerances on length for tubes supplied in straight lengths . 18
6.4.8 Tolerances of form . 18
6.5 Drift expanding . 18
6.6 Freedom from defects . 19
6.6.1 General. 19
6.6.2 Straight tubes . 19
6.6.3 Coiled tubes . 19
6.7 Surface quality . 20
7 Sampling . 20
8 Test methods . 20
8.1 Analysis . 20
8.2 Tensile test . 20
oSIST prEN 12735-2:2023
prEN 12735-2:2023 (E)
8.3 Hardness test . 21
8.4 Estimation of average grain size . 21
8.5 Drift expanding test . 21
8.6 Carbon content test . 21
8.7 Freedom from defects test . 21
8.8 Retests . 21
9 Declaration of conformity and inspection documentation . 22
9.1 Declaration of conformity . 22
9.2 Inspection documentation . 22
10 Packaging, marking and form of delivery . 22
10.1 Packaging and marking . 22
10.2 Form of delivery . 22
10.2.1 Coils . 22
10.2.2 Straight lengths . 23
A.1 Eddy current test . 24
A.2 Hydrostatic test . 25
A.3 Pneumatic test . 25
Bibliography . 27
oSIST prEN 12735-2:2023
prEN 12735-2:2023 (E)
European foreword
This document (prEN 12735-2:2023) has been prepared by Technical Committee CEN/TC 133 “Copper
and copper alloys”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12735-2:2016.
prEN 12735-2:2023 includes the following significant technical changes with respect to
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 given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), 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
consists of two parts:
— Part 1: Tubes for piping systems
— Part 2: Tubes for equipment
...