SIST EN 10305-6:2005
(Main)Steel tubes for precision applications - Technical delivery conditions - Part 6: Welded cold drawn tubes for hydraulic and pneumatic power systems
Steel tubes for precision applications - Technical delivery conditions - Part 6: Welded cold drawn tubes for hydraulic and pneumatic power systems
This Part of EN 10305 specifies the technical delivery conditions for welded cold drawn tubes of circular cross section for use in hydraulic and pneumatic power systems.
Tubes according to this Part of EN 10305 are characterized by having precisely defined tolerances on dimensions and a specified surface roughness.
The allowed pressure rates and temperatures are the responsibility of the customer in accordance with the state of the art and in the application of the safety coefficients specified in the applicable regulations, codes or standards.
Präzisionsstahlrohre - Technische Lieferbedingungen - Teil 6: Geschweißte kaltgezogene Rohre für Hydraulik- und Pneumatik-Druckleitungen
Dieser Teil der EN 10305 enthält die technischen Lieferbedingungen für geschweißte kaltgezogene Präzisionsrohre mit kreisförmigem Querschnitt für die Anwendung in hydraulischen und pneumatischen Druckleitungssystemen.
Rohre nach diesem Teil der EN 10305 sind durch genau definierte Grenzabmaße und eine festgelegte Oberflächenrauheit charakterisiert.
Die Beachtung der zulässigen Druckbeaufschlagung und Temperaturen nach dem Stand der Technik und unter Anwendung der in den entsprechenden Vorschriften, Regelwerken oder Normen festgelegten Sicherheitskoeffizienten liegt in der Verantwortung des Anwenders.
Tubes de précision en acier - Conditions techniques de livraison - Partie 6 : Tubes soudés étirés a froid pour circuits hydrauliques et pneumatiques
La présente partie de l'EN 10305 spécifie les conditions techniques de livraison pour les tubes soudés en acier, étirés a froid, de section circulaire, utilisés dans les circuits hydrauliques et pneumatiques.
Les tubes conformes a la présente partie de l'EN 10305 se caractérisent par des tolérances dimensionnelles définies précisément et par une rugosité spécifiée.
Les taux de pression et les températures autorisés relevent de la responsabilité du client conformément aux regles de l'art et en application des coefficients de sécurité spécifiés dans les réglementations, codes ou normes applicables.
Jeklene cevi za precizno uporabo – Tehnični dobavni pogoji – 6. del: Hladno vlečene varjene cevi za hidravlične in pnevmatične tlačne vode
General Information
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Standards Content (Sample)
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
SIST EN 10305-6:2005
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
EN 10305-6:2005 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.4 4 Symbols.5 5 Classification and designation.5 6 Information to be supplied by the purchaser.5 7 Manufacturing process.6 8 Requirements.7 9 Inspection.13 10 Sampling.15 11 Test methods.16 12 Marking.18 13 Protection and packaging.18 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of 97/23/EC.19 Bibliography.20
SIST EN 10305-6:2005
EN 10305-6:2005 (E) 3 Foreword This document (EN 10305-6:2005) has been prepared by Technical Committee ECISS/TC 29 “Steel tubes and fittings for steel tubes”, the secretariat of which is held by UNI/UNSIDER. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2005, and conflicting national standards shall be withdrawn at the latest by November 2005. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive (97/23/EC). For relationship with EU Directive (97/23/EC), see informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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 the United Kingdom. This document includes a bibliography. EN 10305 consists of the following parts under the general title Steel tubes for precision applications - Technical delivery conditions: Part 1: Seamless cold drawn tubes Part 2: Welded cold drawn tubes Part 3: Welded cold sized tubes Part 4: Seamless cold drawn tubes for hydraulic and pneumatic power systems Part 5: Welded and sized square and rectangular tubes Part 6: Welded cold drawn tubes for hydraulic and pneumatic power systems
SIST EN 10305-6:2005
EN 10305-6:2005 (E) 4 1 Scope This Part of EN 10305 specifies the technical delivery conditions for welded cold drawn tubes of circular cross section for use in hydraulic and pneumatic power systems. Tubes according to this Part of EN 10305 are characterized by having precisely defined tolerances on dimensions and a specified surface roughness. The allowed pressure rates and temperatures are the responsibility of the customer in accordance with the state of the art and in the application of the safety coefficients specified in the applicable regulations, codes or standards. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of those publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 10002-1, Metallic materials − Tensile testing − Part 1: Method of test at ambient temperature. EN 10020, Definition and classification of grades of steel. EN 10021, General technical delivery requirements for steel and iron products. EN 10027-1, Designation systems for steels − Part 1: Steel names, principal symbols. EN 10027-2, Designation systems for steels − Part 2: Numerical system. EN 10052, Vocabulary of heat treatment terms for ferrous products. EN 10168, Steel products – Inspection documents – List of information and description. EN 10204, Metallic products − Types of inspection documents. EN 10246-1, Non-destructive testing of steel tubes − Part 1: Automatic electromagnetic testing of seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for verification of hydraulic leak-tightness. EN 10256, Non-destructive testing of steel tubes – Qualification and competence of level 1 and 2 non-destructive testing personnel. EN 10266, Steel tubes, fittings and structural hollow sections – Symbols and definitions of terms for use in product standards.
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
EN 10305-6:2005 (E) 5 3.1 employer organisation for which a person works on a regular basis NOTE The employer may be either the tube manufacturer or a third party organisation providing non-destructive testing (NDT) services. 4 Symbols For the purposes of this Part of EN 10305 the symbols given in EN 10266 and the following apply. C1, C2 category conformity indicators (see 7.2.2 and 7.2.3) 5 Classification and designation 5.1 Classification In accordance with the classification system in EN 10020, the steel grades given in Table 1 are non-alloy quality steels. 5.2 Designation For the tubes covered by this Part of EN 10305 the steel designation consists of: the number of this Part of EN 10305
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
EN 10305-6:2005 (E) 6 1) Reduced internal roughness of ≤ 2 µm (see 8.4.2.5); 2) leak tightness test method (see 8.4.3); 3) supply to inside diameter and wall thickness or outside diameter and inside diameter (see 8.5.1.1); 4) lengths other than 6 m ( see 8.5.2); 5) Enhanced straightness (see 8.5.3); 6) higher test pressure for hydrostatic test (see 11.4.1); 7) alternative marking (see clause 12); 8) protection by phosphatization (see 13.1); 9) protection by electrolytical zinc coating (see 13.1); 10) protection of tube ends (see 13.1); 11) specified method of packaging (see 13.2). 6.3 Example of an order 1 000 tubes with an outside diameter of 20 mm and a specified wall thickness of 2,5 mm in accordance with this Part of EN 10305, made of steel grade E235, delivered in standard lengths:
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
EN 10305-6:2005 (E) 7 The operating authorization issued by the employer shall be in accordance with a written procedure. NDT operations shall be authorized by a level 3 NDT individual approved by the employer. NOTE The definition of level 1, 2 and 3 can be found in the appropriate standards, e.g. EN 473 and EN 10256. For tube to be used for pressure equipment in categories III and IV (of Directive 97/23/EC) the NDT personnel shall be approved by a recognised third-party organisation. Tubes not processed according to this requirement shall be marked "C 2", unless a requirement to mark "C 1" (see 7.2.2) applies. 8 Requirements 8.1 General The tubes, when inspected in accordance with clauses 9, 10 and 11, shall comply with the requirements of this Part of EN 10305. In addition, the general technical delivery requirements specified in EN 10021 shall apply. 8.2 Chemical composition The cast analysis reported by the steel producer shall apply and comply with the requirements of Table 1. NOTE When welding tubes produced in accordance with this Part of EN 10305, account should be taken of the fact that the behaviour of the steel during and after welding is dependent not only on the steel, but also on the conditions of preparing for and carrying out the welding. Table 1 — Chemical composition (cast analysis)
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
EN 10305-6:2005 (E) 8 Table 2 — Permissible deviations of the product analysis from the specified limits
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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