SIST EN 12735-2:2010

SLOVENSKI STANDARD
oSIST prEN 12735-2:2009
01-marec-2009
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 copper tubes for air conditioning and
refrigeration - Part 2: Tubes for equipment
Kupfer und Kupferlegierungen - Nahtlose Rundrohre aus Kupfer für die Kälte- und
Klimatechnik - Teil 2: Rohre für Apparate
Cuivre et alliages de cuivre - Tubes ronds sans soudure en cuivre 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
oSIST prEN 12735-2:2009 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 12735-2:2009

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oSIST prEN 12735-2:2009
EUROPEAN STANDARD
DRAFT
prEN 12735-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2008
ICS 23.040.15 Will supersede EN 12735-2:2001
English Version
Copper and copper alloys - Seamless, round copper tubes for
air conditioning and refrigeration - Part 2: Tubes for equipment
Cuivre et alliages de cuivre - Tubes ronds sans soudure en Kupfer und Kupferlegierungen - Nahtlose Rundrohre aus
cuivre pour l'air conditionné et la réfrigération - Partie 2: Kupfer 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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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.
: This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
Warning
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12735-2:2008: E
worldwide for CEN national Members.

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oSIST prEN 12735-2:2009
prEN 12735-2:2008 (E)
Contents Page
Foreword .3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .5
4 Designations .6
4.1 Material .6
4.2 Material condition .6
4.3 Product .7
5 Ordering information .7
6 Requirements .8
6.1 Composition .8
6.2 Mechanical properties and grain size .9
6.3 Dimensions and tolerances for smooth tubes .9
6.4 Dimensions and tolerances for inner finned tubes . 13
6.5 Drift expanding (for smooth tubes). 14
6.6 Freedom from defects . 15
6.7 Surface quality . 16
7 Sampling . 16
8 Test methods . 16
8.1 Analysis . 16
8.2 Tensile test . 16
8.3 Hardness test . 16
8.4 Estimation of average grain size . 16
8.5 Drift expanding test . 16
8.6 Carbon content test . 17
8.7 Freedom from defects test . 17
8.8 Retests . 18
9 Declaration of conformity and inspection documentation . 18
9.1 Declaration of conformity . 18
9.2 Inspection documentation . 18
10 Packaging, marking and form of delivery . 18
10.1 Packaging and marking . 18
10.2 Form of delivery . 19
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Pressure Equipment Directive (PED) 97/23/EC . 20
Bibliography . 21

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oSIST prEN 12735-2:2009
prEN 12735-2:2008 (E)
Foreword
This document (prEN 12735-2:2008) 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 12735-2:2001.
This document has been prepared under a mandate given to CEN by the European Commission and the Free
Trade Association, and supports essential requirements of the EU Pressure Equipment Directive (PED)
97/23/EC, see informative Annex ZA which is an integral part of this document.
For relation with EU Directives, see informative Annex ZA, which is an integral part of this document.
Within its programme of work, Technical Committee CEN/TC 133 has, in cooperation with CEN/TC 133/WG 3
"Copper tubes (installation and industrial)", prepared the following standard:
EN 12735-2, Copper and copper alloys — Seamless, round copper tubes for air conditioning and refrigeration
— Part 2: Tubes for equipment.
In comparison with the first edition of EN 12735-2:2001, the following technical changes were made:
a) The size range of the outer diameter for smooth tubes has been increased from (7 to up to and including
64) mm to (6 to up to and including 133) mm;
b) wall thickness, addition of tow steps (2,50 and 3,00) mm;
c) the term "temper" replaced by "material condition" (only in the English wording);
d) the material conditions R250 and R290 have been additionally incorporated;
e) EN 10234 has been replaced by EN ISO 8493.
This is one of a series of European Standards for tubes of copper and copper alloy. Other products are
specified as follows:
EN 1057, Copper and copper alloys — Seamless, round copper tubes for water and gas in sanitary and
heating applications
EN 12449, Copper and copper alloys — Seamless, round tubes for general purposes
EN 12450, Copper and copper alloys — Seamless, round copper capillary tubes
EN 12451, Copper and copper alloys — Seamless, round tubes for heat exchangers
EN 12452, Copper and copper alloys — Rolled, finned, seamless tubes for heat exchangers
EN 12735-1, Copper and copper alloys — Seamless, round copper tubes for air conditioning and refrigeration
— Part 1: Tubes for piping systems
EN 13348, Copper and copper alloys — Seamless, round copper tubes for medical gases or vacuum
EN 13349, Copper and copper alloys — Pre-insulated copper tubes with solid covering
EN 13600, Copper and copper alloys — Seamless copper tubes for electrical purposes
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oSIST prEN 12735-2:2009
prEN 12735-2:2008 (E)
Introduction
It is recommended that tubes manufactured to this standard are certified as conforming to the requirements of
this standard based on continuing surveillance which should be coupled with an assessment of a supplier's
quality management system against EN ISO 9001.
NOTE Appropriate precautions should be taken if applying insulating material because it could be detrimental to the
copper tube.
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oSIST prEN 12735-2:2009
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1 Scope
This European Standard 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 outer diameter from 6 mm up to and including 133 mm.
The tubes are supplied in straight length in the material conditions hard or half-hard or as coils in the material
condition annealed (soft).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 723, Copper and copper alloys — Combustion method for determination of the carbon content on the
inner surface of copper tubes or fittings
EN 1655, Copper and copper alloys — Declarations of conformity
EN 1971, Copper and copper alloys — Eddy current test for tubes
EN 10002-1, Metallic materials — Tensile testing — Part 1: Method of test (at ambient temperature)
EN 10204, Metallic products — Types of inspection documents
EN ISO 2624, Copper and copper alloys — Estimation of average grain size
EN ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
EN ISO 8493, Metallic materials — Tube — Drift expanding test
ISO 1553, Unalloyed copper containing not less than 99,90 % of copper — Determination of copper content
— Electrolytic method
ISO 4741, Copper and copper alloys — Determination of phosphorus content — Molybdovanadate
spectrometric method
NOTE Informative references to documents used in the preparation of this standard, and cited at the appropriate
places in the text, are listed in the Bibliography.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
seamless round copper tube
hollow semi-finished product of copper, circular in cross-section, having a uniform wall thickness, which at all
stages of production has a continuous periphery
NOTE The inner surface of the tube may be enhanced, for example by fins.
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3.2
coil
winding in which the turns are wound into layers parallel to its axis such that successive turns in a given layer
are next to one another (LWC) or are spirally wound (SWC)
3.3
mean diameter
arithmetical mean of the maximum and minimum outside diameters through the same cross-section of the
tube
3.4
deviation from circular form
difference between the maximum and minimum outside diameters measured at any one cross-section of the
tube
3.5
deviation from concentricity
half of the difference between the maximum and minimum wall thicknesses at the same cross-section of the
tube
3.6
production batch
definite quantity of products of the same form, the same material condition and the same cross-sectional
dimensions manufactured during the same production sequence under uniform conditions
4 Designations
4.1 Material
4.1.1 General
The material is designated either by symbol or number (see 6.1).
4.1.2 Symbol
The material symbol designation is based on the designation system given in ISO 1190-1.
4.1.3 Number
The material number designation is in accordance with the system given in EN 1412.
4.2 Material condition
For the purposes of this standard, the following designation, which is in accordance with the system given in
EN 1173, applies for the material condition (see Table 1):
R… Material condition designated by the minimum value of tensile strength requirement for the product with
mandatory tensile strength and elongation requirements.
Y. Material condition designated by the minimum value of 0,2 % proof strength requirement for the product
with mandatory 0,2 % proof strength, tensile strength, elongation and grain size requirements.
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4.3 Product
The product designation provides a standardized pattern of designation from which a rapid and unequivocal
description of a product is conveyed in communication. It provides mutual comprehension at the international
level with regard to products which meet the requirements of the relevant European Standard.
The product designation is no substitute for the full content of the standard.
The product designation for products to this standard shall consist of:
 denomination (Copper tube);
 number of this European Standard (EN 12735-2);
 material condition designation (see Table 1);
 nominal cross-sectional dimensions in millimetres: outside diameter x wall thickness (see Tables 2 and
7);
 inner surface type (the following designations shall be used as appropriate: S for smooth, F for finned).
The derivation of a product designation is shown in the following example.
EXAMPLE Copper tube conforming to this standard, in material condition Y040 (light annealed), nominal outside
diameter 16 mm, nominal wall thickness 0,5 mm, smooth inner surface (S), shall be designated as follows:
Copper tube EN 12735-2 — Y040 — 16 ×× 0,5 — S
××
Denomination
Number of this European Standard
Material condition designation
Nominal cross-sectional dimensions in millimetres
Inner surface type
5 Ordering information
In order to facilitate the enquiry, order and confirmation of order procedures between the purchaser and the
supplier, the purchaser shall state on his enquiry and order the following information:
a) quantity of product required (length, mass);
b) denomination (Copper tube);
c) number of this European Standard (EN 12735-2);
d) material condition designation (see 4.2 and Table 1);
e) nominal cross-sectional dimensions,
 for smooth tubes: outside diameter x wall thickness (see Table 2);
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 for inner finned tubes: outside diameter (see Table 7) × wall thickness at fin root and fin height, which
shall be agreed between the purchaser and the supplier together with any other fin parameters
agreed as necessary.
f) inner surface type (smooth or finned);
g) form of delivery, straight lengths, coil (LWC or SWC) (see 10.2).
In addition, the purchaser shall also state on the enquiry and order the following, if required:
h) whether an other form of delivery than g) is required;
i) whether a declaration of conformity is required (see 9.1);
j) whether an inspection document is required, and if so, which type (see 9.2).
NOTE It is recommended that the product designation as described in 4.3 is used for items b) to f).
In addition, the purchaser shall also state on the enquiry and order any special requirements, if required.
EXAMPLE 1 Ordering details for 300 m copper tube conforming to EN 12735-2, in material condition Y040 (light
annealed), nominal outside diameter 16 mm, nominal wall thickness 0,5 mm, smooth inner surface (S), nominal length
3 m, straight lengths:
300 m Copper tube EN 12735-2 — Y040 — 16 ×× 0,5 — S
××
 — 3 m straight lengths
EXAMPLE 2 Ordering details for 17 tonnes copper tube conforming to EN 12735-2, in material condition Y040 (light
annealed), nominal outside diameter 9 mm, nominal wall thickness 0,28 mm, inner finned (F), 130 kg coil, level wound
(LWC):
17 tonnes Copper tube EN 12735-2 — Y040 — 9 ×××× 0,28 — F
 — 130 kg LWC
6 Requirements
6.1 Composition
The composition shall conform to the following requirements:
Cu + Ag: min. 99,90 %;
0,015 % ≤ P ≤ 0,040 %.
This copper grade is designated either Cu-DHP or CW024A.
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6.2 Mechanical properties and grain size
The 0,2 % proof strength, tensile strength, elongation and grain size shall conform to the requirements given
in Table 1. The tests shall be carried out in accordance with 8.2, 8.3 and 8.4.
Table 1 — Mechanical properties and grain size
Material condition 0,2% proof Tensile Elongation Hardness Grain size
strength strength (indicative)
designation in R R A HV 5
p0,2 m
accordance
common term
MPa MPa % µm
with EN 1173

min. max. min. min. min. max.
a
half hard 250 30 (75 to 100)
R250 — — — —
a
hard 290 3 (min. 100)
R290 — — — —
a
skin hard 80 140 220 40 15 40
Y080
Y040 light annealed 40  90 220 40 15 40
b
Y035 soft annealed 35  80 210 40 30 60
NOTE 1 Hardness figures in parentheses are only requirements of this European Standard when they are agreed
between purchaser and supplier, otherwise they are given for guidance purposes o
...