EN 10305-6:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Präzisionsstahlrohre - Technische Lieferbedingungen - Teil 6: Geschweißte kaltgezogene Rohre für Hydraulik- und Pneumatik-DruckleitungenTubes de précision en acier - Conditions techniques de livraison - Partie 6 : Tubes soudés étirés a froid pour circuits hydrauliques et pneumatiquesSteel tubes for precision applications - Technical delivery conditions - Part 6: Welded cold drawn tubes for hydraulic and pneumatic power systems77.140.75Jeklene cevi in cevni profili za posebne nameneSteel pipes and tubes for specific useICS:Ta slovenski standard je istoveten z:EN 10305-6:2005SIST EN 10305-6:2005en01-september-2005SIST EN 10305-6:2005SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10305-6May 2005ICS 77.140.75English versionSteel tubes for precision applications - Technical deliveryconditions - Part 6: Welded cold drawn tubes for hydraulic andpneumatic power systemsTubes de précision en acier - Conditions techniques delivraison - Partie 6 : Tubes soudés étirés à froid pourcircuits hydrauliques et pneumatiquesPräzisionsstahlrohre - Technische Lieferbedingungen - Teil6: Geschweißte kaltgezogene Rohre für Hydraulik- undPneumatik-DruckleitungenThis European Standard was approved by CEN on 28 February 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10305-6:2005: ESIST EN 10305-6:2005

Relationship between this European Standard and the Essential Requirements of 97/23/EC.19 Bibliography.20
EN ISO 377, Steel and steel products – Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997). EN ISO 2566-1, Steel - Conversion of elongation values – Part 1: Carbon and low-alloy steels (ISO 2566-1:1984). EN ISO 8492, Metallic materials - Tube - Flattening test (ISO 8492:1998) EN ISO 8493, Metallic materials - Tube - Drift-expanding test (ISO 8493:1998) CR 10260, Designation systems for steel - Additional symbols. 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 10020, EN 10021, EN 10052, EN 10266 and the following apply. SIST EN 10305-6:2005

plus either :  the steel name in accordance with EN 10027-1 and CR 10260; or  the steel number in accordance with EN 10027-2. 6 Information to be supplied by the purchaser 6.1 Mandatory information The following information shall be supplied by the purchaser at the time of enquiry and order: a) quantity (mass or total length or number of pieces); b) term “tube”; c) dimensions [outside diameter and wall thickness] (see 8.5.1.1 and Table 4); d) designation of the steel grade in accordance with this Part of EN 10305 (see 5.2); e) type of tube length (see 8.5.2); f) type of inspection (see 9.1). 6.2 Options A number of options are specified in this Part of EN 10305 and these are listed below. In the event that the purchaser does not indicate his wish to implement any of these options at the time of enquiry and order, the tubes shall be supplied in accordance with the basic specification (see 6.1). SIST EN 10305-6:2005

1 000 tubes – 20 x 2,5 – EN 10305-6 – E235 – standard length 7 Manufacturing process 7.1 Steelmaking process The steelmaking process is at the discretion of the manufacturer. Steels shall be fully killed. 7.2 Tube manufacture and delivery conditions 7.2.1 The tubes shall be manufactured from electric welded tubes by cold drawing. Other suitable methods of cold working are permitted. The tubes shall be delivered in the delivery condition +N, which means that after final cold drawing (or other processing) the tubes are normalized in a controlled atmosphere. 7.2.2 Welding shall be carried out by suitably qualified personnel according to suitable operating procedures. For tube to be used for pressure equipment in categories II, III, and IV (of Directive 97/23/EC), the operating procedures and the personnel shall be approved by a competent third-party. Tubes not processed according to this requirement shall be marked "C 1". 7.2.3 All non-destructive testing (NDT) activities shall be carried out by qualified and competent level 1, 2 and/or 3 personnel authorized to operate by the employer.
The qualification shall be in accordance with EN 10256 or, at least, an equivalent to it. It is recommended that the level 3 personnel be certified in accordance with EN 473 or, at least, an equivalent to it. SIST EN 10305-6:2005

a
Steel grade in % by mass C Si Mn P S Steel name Steel numbermax max max max max E155 1.0033 0,11 0,35 0,70 0,0250,015 E195 1.0034 0,15 0,35 0,70 0,0250,015 E235
1.0308 0,17 0,35 1,20 0,0250,015 E275 1.0225 0,21 0,35 1,40 0,0250,015 E355 b 1.0580 0,22 0,55 1,60 0,0250,015 a Elements not included in this Table (but see footnote b) shall not be intentionally added to the steel without the agreement of the purchaser except for elements which may be added for finishing the cast. All appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steel making process. b Additions of Nb, Ti and V are permitted at the discretion of the manufacturer. If added, the content of these elements shall be reported.
Table 2 specifies the permissible deviations of the product analysis from the specified limits on cast analysis given in Table 1. SIST EN 10305-6:2005

on cast analysis given in Table 1 Element Limiting value for cast analysis in accordance with Table 2
in % by mass Permissible deviation of the product analysis in % by mass C ≤ 0,22 + 0,02 Si ≤ 0,55 + 0,05 Mn ≤ 1,60 + 0,10 P ≤ 0,025 + 0,005 S ≤ 0,015 + 0,003
8.3 Mechanical properties The mechanical properties of the tubes shall comply with the requirements of Table 3 and 11.2 or 11.3. Table 3 — Mechanical properties at room temperature Steel grade Steel name Steel number Yield strength a ReH MPa b min Tensile strength Rm MPa b Elongation A % min E155 1.0033 155 270 to 410 28 E195 1.0034 195 300 to 440 28 E235 1.0308 235 340 to 480 25 E275 1.0225 275 410 to 550 21 E355 1.0580 355 490 to 630 22 NOTE The steel grades defined in this Part of EN 10305 have an intrinsic minimum transverse impact energy KV of 27 J at 0 °C. a For tubes with outside diameter ≤ 30 mm and wall thickness ≤ 3 mm, the minimum permitted values of ReH are 10 MPa lower than given in this Table.
b 1 MPa = 1 N/mm²
8.4 Appearance and internal soundness 8.4.1 General The weld area shall be free from cracks and lack of fusion (cold weld). 8.4.2 Appearance 8.4.2.1 The internal and external surface finish of the tubes shall be typical of the
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