EN 13480-4:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kovinski industrijski cevovodi - 4. del: Proizvodnja in vgradnjaMetallische industrielle Rohrleitungen - Teil 4: Fertigung und VerlegungTuyauteries industrielles métalliques - Partie 4: Fabrication et installationMetallic industrial piping - Part 4: Fabrication and installation77.140.75Jeklene cevi in cevni profili za posebne nameneSteel pipes and tubes for specific useICS:Ta slovenski standard je istoveten z:EN 13480-4:2012SIST EN 13480-4:2012en,fr,de01-oktober-2012SIST EN 13480-4:2012SLOVENSKI
STANDARDSIST EN 13480-4:20021DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13480-4
June 2012 ICS 23.040.01 Supersedes EN 13480-4:2002English Version
Metallic industrial piping - Part 4: Fabrication and installation
Tuyauteries industrielles métalliques - Partie 4: Fabrication et installation
Metallische industrielle Rohrleitungen - Teil 4: Fertigung und Verlegung 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.
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 13480-4:2012: ESIST EN 13480-4:2012

Contamination and surface quality of stainless steel . 38 Annex B (normative)
Dimensional tolerances for fabricated spools . 41 Annex Y (informative)
History of EN 13480-4 . 43 Annex ZA (informative)
Relationship between this
European
Standard and the Essential Requirements of EU Pressure Equipment Directive (97/23/EC) . 44 Bibliography . 45
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
This European Standard EN 13480 for metallic industrial piping consists of eight interdependent and not dissociable Parts which are:  Part 1: General;  Part 2: Materials;  Part 3: Design and calculation;  Part 4: Fabrication and installation;  Part 5: Inspection and testing;  Part 6: Additional requirements for buried piping;  CEN/TR 13480-7, Guidance on the use of conformity assessment procedures;  Part 8: Additional requirements for aluminium and aluminium alloy piping. Although these Parts may be obtained separately, it should be recognised that the Parts are interdependent. As such the manufacture of metallic industrial piping requires the application of all the relevant Parts in order for the requirements of the Standard to be satisfactorily fulfilled. This European Standard will be maintained by a Maintenance MHD working group whose scope of working is limited to corrections and interpretations related to EN 13480.
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 10088-1:2005, Stainless steels — Part 1: List of stainless steels EN 10204:2004, Metallic materials — Types of inspection documents EN 13480-1:2012, Metallic industrial piping — Part 1: General EN 13480-3:2012, Metallic industrial piping — Part 3: Design and calculation EN 13480-5:2012, Metallic industrial piping — Part 5: Inspection and testing EN ISO 4063:2010, Welding and allied processes — Nomenclature of processes and reference numbers (ISO 4063:2009) EN ISO 5817:2007, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) — Quality levels for imperfections (ISO 5817:2003) EN ISO 13920:1996, Welding — General tolerances for welded constructions — Dimensions for lengths and angles; shape and position (ISO 13920:1996) EN ISO 15609-1:2004, Specification and qualification of welding procedures for metallic materials — Welding procedure specification — Part 1: Arc welding (ISO 15609-1:2004)
EN ISO 15609-2:2001+A1:2003, Specification and qualification of welding procedures for metallic materials — Welding procedure specification — Part 2: Gas welding (ISO 15609-2:2001) EN ISO 15610:2003, Specification and qualification of welding procedures for metallic materials — Qualification based on tested welding consumables (ISO 15610:2003) EN ISO 15611:2003, Specification and qualification of welding procedures for metallic materials —
Qualification based on previous welding experience (ISO 15611:2003) EN ISO 15612:2004, Specification and qualification of welding procedures for metallic materials — Qualification by adoption of a standard welding procedure (ISO 15612:2004) EN ISO 15613:2004, Specification and qualification of welding procedure for metallic materials — Qualification based on pre-production welding test (ISO 15613:2004) SIST EN 13480-4:2012

(ISO/TR 15608:2005) 3 Terms and definitions For the purposes of this Part of this European Standard, the terms and definitions given in EN 13480-1:2012 together with the following apply. 3.1 field run piping piping installed without preplanning by drawings of the piping routing and the support points
Note to entry
Typical dimensions are DN 50 or smaller. 3.2 spool (with or without overlength) prefabricated assembly of components which forms part of a piping system 3.3 cold forming
3.3.1 cold forming for ferritic steels forming at temperatures 20 °C to 30 °C below the maximum permissible temperature for post-weld heat treatment in accordance with Table 9.14.1-1
3.3.2 cold forming for austenitic steels forming at temperatures below 300 °C
3.4 hot forming for ferritic steels, forming at temperatures at or above the maximum permissible temperature for post-weld heat treatment in accordance with Table 9.14.1-1 4 Symbols For the purposes of this Part of this European Standard, the symbols given in EN 13480-1:2012 apply. Additional symbols are defined in appropriate clauses of this Part. 5 General 5.1 Requirements on the manufacturer The manufacturer shall be responsible for the fabrication and the installation, even if this work will be sub-contracted. SIST EN 13480-4:2012

5.3.3 When joining spools or components, they shall not be strained nor deformed other than as may be required by the design. Designer's installation instructions, if any, shall be observed. NOTE 5.3.3 is deemed to be fulfilled, when the quality characteristics of the material are not impaired by cold or hot forming, e.g. by cutting, grinding, straightening or bending, of the pipes and when the different pipes have been joined such that stresses and deformations which can impair the safety of the piping are excluded. 5.3.4 Any temporary supports or restraints used as an aid during transport, installation or testing shall be removed prior to commissioning. 5.3.5 Appropriate measures shall be taken to avoid corrosion-inducing contamination of stainless steel and non-ferrous materials. If contamination occurs, it shall be properly removed as soon as practicable, notwithstanding any final treatment. NOTE Recommended methods for the prevention and removal of contamination on stainless steel are given in Annex A. 5.3.6 Piping for fluids which are likely to cause condensation shall be installed with adequate slopes and traps. 5.4 Classification of piping The piping systems shall be classified into different categories depending on the fluid carried, diameter and pressure. These are given in EN 13480-1:2012.
NOTE Flame cutting for material groups 1 and 2 can be used for bevelling, if the required bevel forms and tolerances can be achieved and the heat affected zone has no detrimental effects on the quality of the weld.
For material groups 3, 4 and 5, the heat affected zone shall be removed by machining or grinding. Plasma cutting shall be permitted for all material groups given in this European Standard. Plasma cutting shall be preceded by preheating, as specified for welding in 9.11.1. Other cutting and bevelling processes shall be permitted, provided their suitability is demonstrated. 6.2 Transfer of marking for pressure parts For pressure parts, identification of materials shall remain possible, either by retaining or by transferring the mark stipulated by the product standard, or by using a unique code kept in the records of the piping fabricator. Stamping shall not introduce a notching effect, therefore stamping with round edges is recommended. If any method of marking other than hard-stamping or engraving (vibrograph) is used, the fabricator shall ensure that confusion between different materials is not possible, e.g. by separate handling (time and/or place), stamped bands. 7 Bending and other forming 7.1 General 7.1.1 Fabricators of formed pressure parts shall have adequate equipment for the forming procedures and the subsequent heat treatment. NOTE 1 Forming of expansion bellows is specified in EN 13445-3:2009, clause 14. SIST EN 13480-4:2012

1 extrados 2 intrados a optimal range for the longitudinal weld seam at bending b weld seam Figure 7.1.1-1 — Optimal range for the longitudinal weld seam at bending
7.1.2 The forming and post-forming heat treatment of thermomechanical steels shall be given individual consideration. Account shall be taken of the recommendations of the steelmakers. NOTE
Pipes whose properties have been generated by thermomechanical means such as controlled rolling can be formed by hot or cold methods. Such materials may be substantially changed by the forming process and require particular consideration to ensure that the specified properties are recovered after forming. 7.1.3 The following equations shall be used for the calculation of the percentage deformation for cold formed cylinders and cone products made by rolling (see Figure 7.1.3-1): a) For cylinders and cones rolled from flat materials (see Figures 7.1.3-1a) and 7.1.3-1c)):
mfordd50reV
(7.1.3-1) b) For cylinders and cones rolled from intermediate product (see Figures 7.1.3-1b) and 7.1.3-1c)):
a) Initial product b) Intermediate product
c) Finished product Figure 7.1.3-1 — Forming of cylinders and cones
7.1.4 Tools and equipment used for forming shall be maintained to ensure a smooth profile free from scores, scratches or other stress-raising defects. 7.1.5 Heat treatment after forming shall be in accordance with the respective material standard. 7.1.6 Welding on to formed areas shall not be performed until heat treatment is complete. SIST EN 13480-4:2012

NOTE 1 For special design reasons, for example cyclic loading or stress corrosion, heat treatment in excess of that in Table 7.2.1-1 may be specified after cold forming. For austenitic steels having a required minimum value of elongation at rupture A5 equal to or greater than 30 %, a maximum level of 15 % cold deformation shall be acceptable.
NOTE 2 A greater deformation may be accepted if the evidence is supplied that there is a minimum elongation at break of 15 % after cold forming.
Such evidence shall be deemed supplied, if the acceptance certificate shows that elongation at rupture A5 is not less than 30 %. This shall be applicable only in cases where there is no risk of stress corrosion cracking. For austenitic steels having a required minimum value of elongation at rupture A5 less than 30 %, evidence shall be supplied that there is a minimum residual elongation of 15 % after cold forming. Deformation shall not exceed 10 % if the working temperature is below -196 °C. Table 7.2.1-1 — Heat treatment after cold forming of flat products Material groups according to CEN ISO/TR 15608:2005 Deformation Heat treatment 1.1, 1.2, 1.3, 2.1, 2.2 a, , 3, 4 b, 5.1, 5.2 b, 5.3 b, 5.4 b, 6 b,  5 % no 7.1, 7.2, 7.3, 10, 11 > 5 % yes 8.1, 8.2 c c 9.1, 9.2 d d a If not heat treated, qualification tests are required to demonstrate that the material properties are not impaired. b Special heat treatment required in accordance with the material standards where the minimum design temperature is below - 10 °C. c Solution annealed and quenched or stabilized materials do not require heat treatment after cold forming. d To be considered in the first amendment.
7.2.2 Pipes
Pipes shall be heat treated after cold forming in accordance with Table 7.2.2-1. NOTE For special reasons, for example cyclic loading or stress corrosion, heat treatment may be specified after cold forming. SIST EN 13480-4:2012

mr Outside diameter of the pipe
od Heat treatment 1,1 1.2, 1.3 2.1,
2.2 b, 3 b 4 a 5.1, 5.2 a, 5.3 a, 5.4 a 6 a 7 8 9 10, 11
mr  1,3 od
all diameters
yes 1,3 od < mr < 2,5 od
od  142 mm
no
od > 142 mm
yes c 2,5 od  mr all diameters no NOTE
For od and mr, see Figure 7.2.2-1. a Special heat treatment required
in accordance with the material standards where the minimum design temperature is below - 10 °C. b If not heat treated, qualification tests are required to demonstrate that the material properties are not impaired. c Not required for material groups 8.1, 8.2.
Figure 7.2.2-1 — Pipe bending
normalized steels need not be renormalized ;
quenched and tempered steels need only be tempered provided that they have been rapidly cooled by water or air from the forming temperature. NOTE 2 Pipes bent using the incremental induction heating method (induction bends) may undergo thermal treatment during bending by the application of water or air quenches. NOTE 3 Carbon and carbon manganese steels formed using the induction bending process with air or water quenching may be suitable in the as-bent condition for applications where high impact resistance and ductility are not required. Such bends may be supplied without post-bending heat treatment provided that bend hardness does not exceed 285 HV. NOTE 4 Heat treatments for high alloyed ferritic material should follow as soon after forming as practicable, to minimise the risk of hydrogen induced cracking. The manufacturer shall demonstrate that the requisite properties are achieved in the final product by the examination and testing of one or more sample bends. These bends shall be made in accordance with all the relevant parameters to be used in production bends. These parameters include, but are not limited to, chemical composition, forming temperature, forming rate (speed), forming coolant supply, forming dimensions (e.g. bend radius and mr/od) and post-forming heat treatment. 7.3.2 Material groups 8.1 and 8.2 Austenitic steels which have been rapidly cooled from above the solution annealing temperature using water or air during the forming process shall not require post-forming heat treatment. Stabilized austenitic steels formed above the solution annealing temperature shall be subjected to post-forming stabilizing treatment. Stabilized austenitic steels formed in the stabilizing temperature range, shall not require subsequent treatment. Heat treatment shall be carried out in accordance with Table 7.3.2-1. SIST EN 13480-4:2012

b,c Name Number Non-welded parts Welded parts Non-welded parts°C Welded parts °C °C Stabilized steels non-Mo-alloyed X 6 CrNiTi 18-10 X 6 CrNiNb 18-10 1.4541 1.4550 Forming started at
1 000 °C g to 1 150 °C and finished at > 750 C (fastest possible Cooling). Forming started at 1 000 °C to
1 150 °C and finished at > 750 °C (fastest possible Cooling) and stabilized fillers or non-stabilized fillers with  0,04 % C in weld metal 900 ± 20
(L) c 920 ± 20
 1 020
Mo-alloyed X 6 CrNiMoTi 17-12-2 X 6 CrNiMoNb 17-12-2 1.4571 1.4580 not permitted d not permitted d
(X 4 NiCrMoCuNb 20-18 e,f) 1.4505
 1 050
non stabilized steels low C-content /non-Mo-alloyed X 2 CrNi 19-11 X 2 CrNiN 18-10 1.4306 1.4311 900 ± 20
(L) c 920 ± 20
(L) c, h  1 000
low C-content /Mo-alloyed X 2 CrNiMo 17-12-2 X 2 CrNiMo 18-14-3 X 2 CrNiMoN 17-11-2 1.4404 1.4435 1.4406 960 ± 20 °C (L) c, e 980 ± 20
(L)c, h, i  1 020
X 2 CrNiMoN 17-13-3 X 2 CrNiMo 18-15-4 X 2 CrNiMoN 17-13-5 1.4429 1.4438 1.4439
 1 040
high C-content /non Mo-alloyed X 4 CrNi 18-10 X 4 CrNi 18-12 1.4301 1.4303 Forming started at
1 000 °C g to 1 150 C e and finished at > 875 °C (quenching in/with water for wall thicknesses  6 mm) Forming started at 1 000°C to 1 150 °C e and finished at > 875°C (quenching in/with water for wall thicknesses  6 mm) and stabilized fillers or non-stabilized fillers with  0,06 % C not permitted not permitted  1 000
high C-content/Mo- alloyed X 5 CrNiMo 17-12-2 X 3 CrNiMo 17-13-3 1.4401 1.4436
 1 050
a Stabilizing or corresponding annealing in the case of non stabilized steels with approximately 30min critical interval.
b For eord ≥ 6 mm the type of cooling shall be quenching in/with water or cooling in air flow (W SL). c For eord < 6 mm cooling shall be in air flow (L). d Unless required by process conditions. e Minimal critical interval is 5 min. f Materials not in EN 10088-1:2005. g Starting temperature of 1 000 °C may be lowered if part was in the quenched state prior to hot forming. h Stabilizing not permissible if stabilized fillers are used. i Steels No. 1.4406 and 1.4429 may be stabilized at lower temperatures if the same material characteristics will be reached. SIST EN 13480-4:2012

1002minomaxominomaxoddddu (7.4.1-1) where
maxod is the maximum outside diameter measured, in mm;
minod is the minimum outside diameter measured at the same cross section as maxod, in mm. The out-of-roundness of the bend shall not exceed the limits given in Figure 7.4.1-1. The ends of the bent pipes shall comply with the tolerances for the base pipe.
is the outside diameter ;
mr
is the mean bending radius ; u
is the out-of-roundness Figure 7.4.1-1 — Acceptable out-of-roundness
7.4.2 Out-of-roundness of bends under external pressure and vacuum Values for out-of-roundness shall be conform to the values stated in the design. 7.4.3 Waves at bends There shall be no waves at bends, unless the waves comply with both of the following conditions: a) 01m03,0dh (7.4.3-1) where
hm is the mean height of adjacent waves, calculated as follows: 030402m2dddh
(7.4.3-2) where d01, d02, d03, d04 are as shown in Figure 7.4.3-1.
(7.4.3-3) where
a is the wave distance; hm is the mean height of adjacent waves, calculated as in (7.4.3-1).
NOTE For clarity, waves have been exaggerated. Figure 7.4.3-1 — Waves at bends
7.4.4 Start-up bulge of induction bends The height of any start-up bulge/hump shall not exceed 25 % of the nominal wall thickness, and the maximum dimension of its base shall be at least eight times its height and shall blend smoothly into the adjoining surfaces (see Figure 7.4.4-1). The out-of-roundness tolerance specified in 7.4.1 shall also be applicable on a cross-section taken at the point of irregularity. SIST EN 13480-4:2012

NOTE
a  8 h
4eh where e is the nominal wall thickness Figure 7.4.4-1 — Start-up bulge 7.5 Surface finish The surface of the bend shall be such as to permit a visual examination. All bends shall be free from surface imperfections such as cracks, indentations, laps and scabs. Where surface imperfections are ground out, the wall thickness shall not be reduced below the calculated minimum wall thickness. Areas which are ground to remove imperfections shall be examined by surface crack detection methods appropriate to the material to ensure complete removal of the imperfections. Repairs by welding shall not be permitted. 8 Installation of piping 8.1 Fixing and alignment The piping shall be installed in accordance with the design requirements given in EN 13480-3:2012. For special operations, e.g. balancing and cold pull, instructions shall be specified. The slope of the piping shall be checked to ensure that continuous falls are achieved in accordance with the design. Where necessary, during assembly of piping sections, the installer shall use temporary supports to ensure that no unacceptable stress or deformation occurs in the piping and connected equipment as a consequence of the cantilever effect of unsupported weight distribution. NOTE 1 Temporary auxiliary supports should be used to replace the supporting effort of connected equipment. Piping shall not be distorted for the purpose of alignment for joint assembly.
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