EN 12452:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.L]PHQMHYDOQLNHKupfer und Kupferlegierungen - Nahtlose, gewalzte Rippenrohre für WärmeaustauscherCuivre et alliages de cuivre - Tubes sans soudure à ailettes pour échangeurs thermiquesCopper and copper alloys - Rolled, finned, seamless tubes for heat exchangers77.150.30Bakreni izdelkiCopper products23.040.15Cevi iz neželeznih kovinNon-ferrous metal pipesICS:Ta slovenski standard je istoveten z:EN 12452:2012SIST EN 12452:2012en,de01-september-2012SIST EN 12452:2012SLOVENSKI
STANDARDSIST EN 12452:20001DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12452
May 2012 ICS 23.040.15; 77.150.30 Supersedes EN 12452:1999English Version
Copper and copper alloys - Rolled, finned, seamless tubes for heat exchangers
Cuivre et alliages de cuivre - Tubes sans soudure à ailettes pour échangeurs thermiques
Kupfer und Kupferlegierungen - Nahtlose, gewalzte Rippenrohre für Wärmeaustauscher This European Standard was approved by CEN on 20 April 2012.
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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12452:2012: ESIST EN 12452:2012

Freedom from defects tests . 18Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Pressure Equipment Directive (PED) 97/23/EC . 20Bibliography . 21Figures Figure 1 — Rolled finned tube .6 Tables Table 1 — Composition of copper and copper alloys . 15 Table 2 — Mechanical properties of copper and copper alloy tubes before fining . 16 Table 3 — Tolerances on outside diameter . 16 Table 4 — Tolerances on length . 16 Table 5 — Tolerances on fin pitch . 17 Table 6 — Sampling rate . 17 Table ZA.1 — Correspondence between this European Standard and Directive 97/23/EC . 20
where d1 is the outside diameter of unfinned section; d2 is the outside diameter of finned section; l1 is the total tube length; l2 is the length of unfinned tube end; l3 is the length of unfinned intermediate section; l4 is the distance from tube end to the unfinned intermediate section; h is the fin height; s1 is the wall thickness of unfinned section; s2 is the wall thickness of finned section. Figure 1 — Rolled finned tube 3.2 deviation from circular form difference between the maximum and minimum outside diameters measured at any one cross-section of the tube [SOURCE: EN 1057:2006+A1:2010, 3.6] 4 Designations 4.1 Material 4.1.1 General The material is designated either by symbol or by number (see Table 1). 4.1.2 Symbol The material symbol designation is based on the designation system given in ISO 1190-1. NOTE Although material symbol designations used in this European Standard might be the same as those in other standards using the designation system given in ISO 1190-1, the detailed composition requirements are not necessarily the same. SIST EN 12452:2012

Material condition designated by the minimum value of tensile strength requirement for the product with mandatory tensile property requirements; H.
Material condition designated by the minimum value of hardness requirement for the product with mandatory hardness requirements; S (suffix)
Material condition for a product which is stress relieved. NOTE Products in the R. or H. condition can be specially processed (i.e. mechanically or thermally stress relieved) in order to lower the residual stress level to improve the resistance to stress corrosion (see 6.6.2). Exact conversion between material conditions designated R. and H. is not possible. Except when the suffix S is used, the material condition is designated by only one of the above designations. 4.3 Product The product designation provides a standardized pattern of designation from which a rapid and unequivocal description of a product can be 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 European Standard shall consist of:  denomination (Tube);  number of this European Standard (EN 12452);  material designation, either symbol or number (see Table 1);  material condition designation (see Table 2);  nominal cross-sectional dimensions expressed as outside diameter and wall thickness of the tube before finning (see 6.3);  fin pitch (N), (number of fins per inch) and fin height (H). The derivation of a product designation is shown in the following example. EXAMPLE Tube conforming to this European Standard, in material designated either CuNi10Fe1Mn or CW352H, in material condition R290, with nominal outside diameter 22 mm, nominal wall thickness 1,25 mm, number of fins per inch 19 and fin height 1,5 mm, shall be designated as follows: SIST EN 12452:2012

or Tube EN 12452 – CW352H
–
R290 – 22 ×××× 1,25 – N19 ×××× H1,5 Denomination
Number of this European Standard Material designation
Material condition designation
Nominal cross-sectional dimensions in millimetres Fin pich and fin height 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 (number of pieces or length); b) denomination (Tube); c) number of this European Standard (EN 12452); d) material designation (see Table 1); e) material condition designation (see 4.2 and Table 2); f) nominal cross-sectional dimensions (outside diameter × wall thickness); g) fin pitch (N) and fin height (H); h) lengths: total tube length (l1 in Figure 1), length of unfinned tube ends, if required (l2 in Figure 1), length and location of unfinned intermediate section, if required (l3 and l4 in Figure 1). NOTE 1 It is recommended that the product designation, as described in 4.3, be used for items b) to g). In addition, the purchaser shall also state on the enquiry and order any of the following, if required: i) whether a specially shaped inside surface is required; NOTE 2 Details should be agreed between the purchaser and the supplier. j) whether the tubes are for subsequent welding applications (see Table 1); k) whether the tubes are for sea water application (see Table 1), and if so, the composition limits required; l) which test method is to be used for the freedom from defects test, if the choice is not to be left to the discretion of the manufacturer; m) whether deburring is required (see 6.5); n) whether eddy current test sensitivity other than that specified in Annex A is required (see A.1.6); SIST EN 12452:2012

– nominal length 3 000 mm or 100 pieces Tube EN 12452 – CW352H – R290 – 22 ×××× 1,25 – N19 ×××× H1,5
– nominal length 3 000 mm 6 Requirements 6.1 Composition The composition shall conform to the requirements for the appropriate material given in Table 1. 6.2 Mechanical properties The properties shall conform to the appropriate requirements given in Table 2. The tests shall be carried out in accordance with 8.2 (tensile test) or 8.3 (hardness test). NOTE After the fins have been rolled, the finned sections of the tube are in a work-hardened or "as finned" condition. Tubes made from materials liable to stress corrosion cracking [CuZn20Al2As (CW702R) and CuZn28Sn1As (CW706R)] are given a stress relieving anneal after the fins have been rolled (see 6.6.2). 6.3 Dimensions and tolerances 6.3.1 General The geometrical properties of the tubes are defined by outside diameter, wall thickness, fin height, fin pitch and length. The dimensional tolerances are applied on the outside diameter, wall thickness,
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