EN 13480-8:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kovinski industrijski cevovodi - 8. del: Dodatne zahteve za cevovode iz aluminija in aluminijevih zlitinMetallische industrielle Rohrleitungen - Teil 8: Zusatzanforderungen an Rohrleitungen aus Aluminium und AluminumlegierungenTuyauteries industrielles métalliques - Partie 8: Exigences complémentaires relatives aux tuyauteries en aluminium et alliages d'aluminiumMetallic industrial piping - Part 8: Additional requirements for aluminium and aluminium alloy piping77.150.10Aluminijski izdelkiAluminium products77.140.75Jeklene cevi in cevni profili za posebne nameneSteel pipes and tubes for specific useICS:Ta slovenski standard je istoveten z:EN 13480-8:2012SIST EN 13480-8:2012en,fr,de01-oktober-2012SIST EN 13480-8:2012SLOVENSKI
STANDARDSIST EN 13480-8:2007/A1:2011SIST EN 13480-8:20071DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13480-8
June 2012 ICS 23.040.01 Supersedes EN 13480-8:2007English Version
Metallic industrial piping - Part 8: Additional requirements for aluminium and aluminium alloy piping
Tuyauteries industrielles métalliques - Partie 8: Exigences complémentaires relatives aux tuyauteries en aluminium et alliages d'aluminium
Metallische industrielle Rohrleitungen - Teil 8: Zusatzanforderungen an Rohrleitungen aus Aluminium und Aluminumlegierungen This European Standard was approved by CEN on 8 May 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.
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Dimensional tolerances . 29 Annex B (normative)
Transition joints . 31 Annex Y (informative)
History of EN 13480-8 . 35 Annex ZA (informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 97/23/EC . 36 Bibliography . 37
Figures Figure 6.5.1 — Mitre bend . 14 Figure 7.6.3.1 — Socket welds . 20 Figure A.1 — Dimensional details of spools . 30 Tables Table 5.2-1 — Grouping system based on CEN ISO/TR 15608:2000 and allowable materials of construction based on EN 12392:2000 using the EN AW numbers according to EN 573-3:2009 . 10 Table 6.2-1 — Design stresses for aluminium and aluminium alloy material . 12 Table 6.2-2 — Allowable design strength values for 6 000 series aluminium alloys in the welded condition (see 5.6) . 13 Table 6.5-1 — Special symbols for subclause 6.5 . 14 Table 7.3-1 — Tolerances for welded pipes . 16 Table 7.5-1 — Heat treatment of flat products after cold forming . 17 Table 7.5-2  Heat treatment of pipes after cold forming . 18 Table 7.5-3  Heat treatment after hot forming . 18 Table 8.2-1 — Destructive testing of formed and heat treated parts . 23 SIST EN 13480-8:2012

The contact to submit queries can be found at http://portailgroupe.afnor.fr/public_espacenormalisation/CENTC267WG8/index.htm. A form for submitting questions can be downloaded from the link to the MHD website. After subject experts have agreed an answer, the answer will be communicated to the questioner. Corrected pages will be given specific issue number and issued by CEN according to CEN Rules. Interpretation sheets will be posted on the website of the MHD.
EN 895:1995, Destructive tests on welds in metallic materials — Transverse tensile test EN 970:1997, Non-destructive examination of fusion welds — Visual examination EN 1321:1996, Destructive tests on welds in metallic materials — Macroscopic and microscopic examination of welds
EN 1435:1997+A2:2003, Non-destructive examination of welds -— Radiographic examination of welded joints EN 1779:1999+A1:2003, Non-destructive testing — Leak testing — Criteria for method and technique selection EN 10002-1:2001, Metallic materials — Tensile testing — Part 1: Method of test at ambient temperature
EN 10045-1:1990, Metallic materials — Charpy impact test — Part 1: Test method EN 10204:2004, Metallic products — Types of inspection documents EN 10246 (all parts), Non-destructive testing of steel tubes
Pure aluminium with ≤ 1 % impurities or alloy content EN AW – 1050A EN AW – 1070A EN AW – 1080A
EN AW–Al 99,5 EN AW–Al 99,7 EN AW–Al 99,8(A) O, H111, H112 O, H111, H112 O, H111, H112 22 Non heat treatable alloys 22.1 Aluminium-manganese alloys EN AW – 3003
EN AW – 3103 EN AW – 3105 EN AW–Al Mn1Cu EN AW–Al Mn1 EN AW–Al Mn0,5Mg0,5 O, H111, H112 O, H111, H112 O, H111
22.2 Aluminium-magnesium alloys with Mg ≤ 1,5 % EN AW – 5005 EN AW – 5005A EN AW – 5050 EN AW–Al Mg1(B) EN AW–Al Mg1(C) EN AW–Al Mg1,5 (C) O, H111, H112 O, H111, H112 O, H111 22.3 Aluminium-magnesium alloys with 1,5 % < Mg ≤ 3,5 % EN AW – 5049 EN AW – 5052 EN AW – 5154A EN AW – 5251 EN AW – 5454 EN AW – 5754 EN AW–Al Mg2Mn0,8 EN AW–Al Mg2,5 EN AW–Al Mg3,5(A) EN AW–Al Mg2 EN AW–Al Mg3Mn(A) EN AW–Al Mg3 O, H111, H112 O, H111, H112 O, H111, H112 O, H111, H112 O, H111, H112 O, H111, H112 22.4 Aluminium-magnesium alloys with Mg > 3,5 % EN AW – 5083 EN AW – 5086 EN AW–Al Mg4,5Mn0,7 EN AW–Al Mg4 O, H111, H112 O, H111
23 Heat treatable alloys 23.1 Aluminium-magnesium-silicon alloys EN AW 6060 EN AW 6061 EN AW–Al MgSi
EN AW–Al Mg1SiCu T4a
T4b, T6c
a for seamless pipes and profiles only b for seamless pipes and flanges only c for flanges only
5.3 Elongation after fracture Aluminium and aluminium alloys used for parts of industrial piping that are subjected to cold forming shall have a specified minimum elongation after fracture measured on a gauge length ooSL65,5 that is  14 % in the longitudinal or transverse direction as defined by the material specification.
Aluminium and aluminium alloys used for parts of industrial piping that are not subjected to cold forming (e.g. straight flanges and nozzles) shall have a specified minimum elongation after fracture measured on a gauge length
ooSL65,5 that is  10 % in the longitudinal or transverse direction as defined by the material specification.
5.6 Design temperature and properties NOTE See also 4.2.2 of EN 13480-2:2012.
The 2nd paragraph of 4.2.2.1 of EN 13480-2:2012 is not applicable for aluminium and aluminium alloys.
The maximum design temperature shall not exceed that defined in Table 1 of EN 12392:2000 as the maximum working temperature. For material of group 22.4 the maximum design temperature is 75 °C
(200 °C for non-corrosive service). The mechanical properties used for design shall be taken from the tabulated values in EN 12392:2000 at room temperature for Rm/20 / Re/20 and at the highest design temperature for Re/t.
For welded parts and heat treated parts after forming only the values equivalent to the O temper shall be used for design when 6 000 series flanges, etc. are welded. These values are not quoted in EN 12392:2000 and so the tabulated values for f shown in Table 6.2-2 shall be used for design. The weld area shall be based on the O temper but the flange strength away from the weld (2t) may be based on the actual temper (T4 or T6). For aluminium and aluminium alloys values of 0,2 % proof stress (or 1 % proof stress for material group 21-1 000 series aluminium) for temperatures above 20 °C shall be established by linear interpolation between two adjacent values in EN 12392:2000 except that for alloys 5083 and 5086 the respective value at 50 °C may be used for 65 °C. For material of group 22.4: For short periods, higher temperatures are permitted (e.g. when defrosting refrigerating plant) up to 150 °C are permissible provided that the pressure is reduced to half the working pressure for a period up to 8 h and to atmospheric pressure for a period up to 24 h. 5.7 Prevention of brittle fracture Annex B of EN 13480-2:2012 is not applicable. All materials of Table 5.2-1 are suitable for any minimum metal temperature without impact testing. NOTE See also EN 1252-1:1998 and 8.4 of EN 12392:2000.
50 75 100 125 a 150 175 a EN AW 6060 40 40 40 38 - - EN AW 6061 55 55 55 54 51 43 a For maximum design temperature see 5.6. Values for 125 °C (EN AW 6060) and 175 °C (EN AW 6061) shall be used for interpolation only. NOTE Data are derived from EN 13445-8:2009.
6.3 Straight pipes In general, straight pipes shall be designed in accordance with 6.1 of EN 13480-3:2012. For D0/Di > 1,2 Equation 6.3-1 may be used. In this case pipes shall be seamless or tested in accordance with 8.4.3 and 8.6 of this European Standard for z = 1,0 and the maximum allowable pressure pa shall be determined as follows: 1,51xlnxxai0t,2,0p32DDRp (6.3-1) For material group 21 Rp1,0,t shall be used instead of Rp0,2,t. 6.4 Pipe bends and elbows The standard method for calculation of bends and elbows for aluminium and aluminium alloys shall be the method described in B.4.1.3 of EN 13480-3:2012, Annex B. NOTE 1 This clause should not be understood as to prohibit the other methods given in EN 13480-3:2012, but to reflect the actual situation at the bend manufacturers. NOTE 2 Also see 6.2.3 and Annex B, Equation B4.1-11 of EN 13480-3:2012. 6.5 Mitre bends Clause 6.3 of EN 13480-3:2012 may be used for the design of mitre bends for aluminium and aluminium alloys.
Alternatively the method described in Equations 6.5-1 to 6.5-4 may also be used for multiple mitre bends for aluminium and aluminium alloys according to Figure 6.5-1 with a maximum angle , of 22,5°. The pressure limit given in EN 13480-3:2012, 6.3.1 is not applicable for this method. NOTE Current experiences are available up to pressures of 63 bar for time independent design stresses, however this does not prohibit the calculation of mitre bends to the given equation for use of higher pressures, but shows the reference pressure for which mitre bends made of aluminium and aluminium alloys and designed to the rules are in safe operation. NOTE 2 Source: FDBR Guideline, Design of power piping, July 1995 The following symbols apply for the alternative method in addition to those mentioned in Clause 3. SIST EN 13480-8:2012

mm a See footnote a in Table 3.2-1 of EN 13480-3:2012.
fzedBpaiviv502, (6.5-1) shall be met with regard to internal pressure loading, where with the smaller value of
tan,iviveededr8021 (6.5-2) tan22br (6.5-3) the value Bi is found as follows
edrdrBivivi,,50250 (6.5-4)
Figure 6.5.1 — Mitre bend 6.6 Socket welds Socket welds may only be used for pipes DN 50 and below. SIST EN 13480-8:2012

 1,5 %
Out of roundness
maximum 1,5 % for the ratio e/D < 0,01 maximum 1,0 % for the ratio e/D  0,01 EN 13480-4:2012, Equation 7.4.1-1 Wall thickness As for sheet, strip or plate EN 485-3:2003; EN 485-4:1993 Out of roundness shall be calculated in accordance with Equation 7.4.1-1 of EN 13480-4:2012. The determination of the out of roundness need not consider the elastic deformation due to dead-weight of the pipe. 7.3.2 Welded piping construction Clause 5.6 of EN 13480-4:2012 is not applicable for piping in aluminium and aluminium alloys. Guidance for the tolerances of piping spools made of aluminium and aluminium alloys is given in Annex A. Clause 7.4 of EN 13480-4:2012 is applicable for aluminium and aluminium alloys, except 7.4.4 concerning induction forming. The requirements according to 9.9 of EN 13480-4:2012 shall apply with the following modification for aluminium and aluminium alloys: Replace the reference to EN 25817 with EN ISO 10042:2005. 7.4 Cutting and bevelling In addition to the requirements of 6.1 of EN 13480-4:2012, the following shall apply for industrial piping of aluminium and aluminium alloys: Aluminium and its alloys shall be cut to size and shape preferably by machining or by thermal cutting process, e.g. plasma arc cutting, or by a combination of both. Additionally, hydro mechanical methods of edge preparation are acceptable. Flame cutting is not permitted. For plates of  25 mm thickness cold shearing is permissible. Edges that are cut by thermal process or by cold shearing shall be dressed back by machining unless the manufacturer can demonstrate that the material and the weldability has not been adversely affected by the cutting process. The surface to be welded shall be thoroughly cleaned of aluminium oxide traces and greases by mechanical means or by pickling. Chloride containing detergents are prohibited. 7.5 Bending and other forming 7.5.1 General The requirements of Clause 7 of EN 13480-4:2012 shall apply with the following additions/exclusions.
7.5.2 Definition of cold- and hot forming Cold forming of material groups 21 and 22 shall be carried out at temperatures below 200 °C.
b) the holding temperature shall be in the range between 320 °C and 380 °C depending on the alloy type; c) the holding time at the holding temperature shall be between 10 min and 60 min depending on the ratio of cold forming;
d) the cooling shall be performed in still air, the cooling rate needs not to be controlled.
7.5.3.2 Flat products For aluminium and aluminium alloys heat treatment shall be carried out in accordance with Table 7.5 -1.
Table 7.5-1 — Heat treatment of flat products after cold forming Material groups according to
Table 5.2-1 Ratio of deformationd Vd (%) Heat treatment 21  15 % no 21 > 15 % yesa, annealing 22.1b, 22.2b, 22.3b, 22.4b  5 % no 22.1b, 22.2b, 22.3b, 22.4b > 5 % yesc, annealing a With levels of cold forming and a ratio of deformation above 15 % for materials of group 21 or above, if proof can be furnished in specific cases that the residual elongation after rupture after cold forming remains at least 10 %, then in these cases annealing is not required. b Elongation prior to forming  14 %. c With levels of cold forming and a ratio of deformation above 5 % for materials of group 22 or above, if proof can be furnished in specific cases that the residual elongation after rupture after cold forming remains at least 10 %, then in these cases annealing is not required. d For Vd (%) for cylinders and cones see 7.13 of EN 13480-4:2012, for Vd (%) for dished circular products see 9.2.1 of EN 13445-4:2009.
Table 7.5-2  Heat treatment of pipes after cold forming Material groups according to Table 5.2-1 Mean bending radius of the pipe rm External diameter of the tube do Heat treatment 21  1,3 De all diameters no 21 < 1,3 De all diameters yes, annealing 22.1a, 22.2a, 22.3a, 22.4a  2,5 De all diameters no 22.1a, 22.2a, 22.3a, 22.4a < 2,5 De all diameters yes, annealing NOTE For do
and rm see Figure 7.2.2-1 of EN 13480-4:2012. a Elongation prior to forming  14 %.
7.5.4 Heat treatment after hot forming For heat treatment after hot forming the requirements of 7.3 of EN 13480-4:2012 are not applicable for industrial piping of aluminium and aluminium alloys. For aluminium and aluminium alloys the heat treatment shall be carried out in accordance with Table 7.5-3 and as following: The heat treatment parameters shall be in accordance with the material specification of the material manufacturer. The general heat treatment parameters shall be: a) the heating rate shall be as rapid as possible;
b) the holding temperature shall be in the range between 320 °C and 380 °C depending on the alloy type; c) the holding time at the holding temperature shall be between 10 min and 60 min depending on the ratio of cold forming; d) the cooling shall be performed in still air, the cooling rate needs not to be controlled.
Table 7.5-3  Heat treatment after hot forming Material groups according to Table 5.2-1 Hot forming conditions Heat treatment 21, 22 Heat treatment should be applied if the forming process of the last forming stage is completed at  300 °C. yes, annealing No subsequent heat treatment should be applied if the forming process of the last forming stage is completed above 300 °C.
no
7.6.2 Welding processes The requirements according to 9.3 of EN 13480-4:2012 shall apply with the following modification for aluminium and aluminium alloys: Qualification of welding procedure specifications (WPQR). The requirements according to 9.3.1 of EN 13480-4:2012 shall apply with the following modifications for aluminium and aluminium alloys: refer to EN ISO 15614-2:2005. Furthermore, impact testing is not applicable for piping of aluminium and aluminium alloys, see 5.7 of this European Standard. Oxy fuel gas welding processes according to EN ISO 4063:2010 are not permitted. For qualification of welding procedures for EN AW 6061 material, the result of the tensile tests carried out in accordance with EN ISO 15614-2:2005 shall show the following data wit
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