SIST EN 10305-2:2016
(Main)Steel tubes for precision applications - Technical delivery conditions - Part 2: Welded cold drawn tubes
Steel tubes for precision applications - Technical delivery conditions - Part 2: Welded cold drawn tubes
This European Standard specifies the technical delivery conditions for welded cold drawn steel tubes of circular cross section for precision applications with specified outside diameter D ≤ 150 mm.
NOTE This document may also be applied to other types of cross section.
Tubes according to this document are characterized by having precisely defined tolerances on dimensions and a specified maximum surface roughness. Typical fields of application are in the automotive, furniture and general engineering industries.
Präzisionsstahlrohre - Technische Lieferbedingungen - Teil 2: Geschweißte kaltgezogene Rohre
Diese Europäische Norm legt die technischen Lieferbedingungen für geschweißte kaltgezogene Präzisions¬rohre aus Stahl mit kreisförmigem Querschnitt und einem Nennaußendurchmesser D 150 mm fest.
ANMERKUNG Dieses Dokument darf auch auf andere Querschnitte angewendet werden.
Rohre nach diesem Dokument sind durch genau definierte Grenzabmaße und eine festgelegte maximale Oberflächenrauheit charakterisiert. Typische Anwendungsgebiete sind der Fahrzeugbau, die Möbelindustrie und der Allgemeine Maschinenbau.
Tubes de précision en acier - Conditions techniques de livraison - Partie 2 : Tubes soudés étirés à froid
La présente partie de l'EN 10305 spécifie les conditions techniques de livraison pour les tubes en acier soudés étirés à froid, de section circulaire, destinés aux applications de précision avec un diamètre extérieur spécifié D ≤ 150 mm.
NOTE Le présent document peut aussi s'appliquer à d'autres types de section.
Les tubes conformes au présent document se caractérisent par des tolérances dimensionnelles précises et par une rugosité maximale spécifiée. Les domaines typiques d'application se situent dans le secteur automobile, l'ameublement et l'ingénierie générale.
Jeklene cevi za precizno uporabo - Tehnični dobavni pogoji - 2. del: Varjene hladno vlečene cevi
Ta evropski standard določa tehnične dobavne pogoje za varjene hladno vlečene cevi s krožnim prečnim prerezom za precizno uporabo z določenim zunanjim premerom D ≤ 150 mm.
OPOMBA: Ta dokument se lahko uporablja tudi za druge vrste prečnih prerezov.
Cevi v skladu s tem dokumentom imajo natančno opredeljene tolerance za mere in določeno največjo površinsko hrapavost. Tipična področja uporabe so v avtomobilski in pohištveni industriji ter v splošnem inženirstvu.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Präzisionsstahlrohre - Technische Lieferbedingungen - Teil 2: Geschweißte kaltgezogene RohreTubes de précision en acier - Conditions techniques de livraison - Partie 2 : Tubes soudés étirés à froidSteel tubes for precision applications - Technical delivery conditions - Part 2: Welded cold drawn tubes77.140.75Jeklene cevi in cevni profili za posebne nameneSteel pipes and tubes for specific useICS:Ta slovenski standard je istoveten z:EN 10305-2:2016SIST EN 10305-2:2016en,fr,de01-oktober-2016SIST EN 10305-2:2016SLOVENSKI
STANDARDSIST EN 10305-2:20101DGRPHãþD
SIST EN 10305-2:2016
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 10305-2
March
t r s x ICS
y yä s v rä y w Supersedes EN
s r u r wæ tã t r s rEnglish Version
Steel tubes for precision applications æ Technical delivery conditions æ Part
tã Welded cold drawn tubes Tubes de prßcision en acier æ Conditions techniques de livraison æ Partie
t ã Tubes soudßs ßtirßs à froid
Präzisionsstahlrohre æ Technische Lieferbedingungen æTeil
tã Geschweißte kaltgezogene Rohre This European Standard was approved by CEN on
s z January
t r s xä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey andUnited Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s r u r wæ tã t r s x ESIST EN 10305-2:2016
EN 10305-2:2016 (E) 2 Contents Page European foreword . 4 1 Scope . 5 2 Normative references . 5 3 Terms and definitions . 6 4 Symbols . 6 5 Classification and designation . 7 5.1 Classification . 7 5.2 Designation. 7 6 Information to be supplied by the purchaser . 7 6.1 Mandatory information . 7 6.2 Options . 7 6.3 Example of an order . 8 7 Manufacturing process . 8 7.1 Steelmaking process . 8 7.2 Tube manufacture and delivery conditions . 8 8 Requirements . 9 8.1 General . 9 8.2 Chemical composition . 9 8.3 Mechanical properties . 10 8.4 Appearance and internal soundness. 11 8.5 Dimensions and tolerances . 12 8.5.1 Outside diameter, inside diameter, wall thickness and eccentricity . 12 8.5.2 Lengths . 15 8.5.3 Straightness . 16 8.5.4 Preparation of ends . 17 9 Inspection . 17 9.1 Types of inspection . 17 9.2 Inspection documents . 17 9.2.1 Types of inspection documents. 17 9.2.2 Content of inspection documents . 17 9.3 Summary of inspection and testing . 18 10 Sampling . 18 10.1 Test unit . 18 10.2 Preparation of samples and test pieces . 19 10.2.1 Location, orientation and preparation of samples and test pieces for mechanical tests . 19 10.2.2 Test pieces for roughness measurement . 19 11 Test methods . 19 11.1 Tensile test . 19 11.2 Flattening test . 19 11.3 Drift expanding test . 20 11.4 Dimensional inspection . 20 11.5 Roughness measurement . 20 SIST EN 10305-2:2016
EN 10305-2:2016 (E) 3 11.6 Visual examination . 21 11.7 Non-destructive testing . 21 11.7.1 Testing for longitudinal imperfections . 21 11.7.2 Leak tightness . 21 11.8 Retests, sorting and reprocessing . 21 12 Marking . 21 13 Protection and packaging . 21 Bibliography . 23
SIST EN 10305-2:2016
EN 10305-2:2016 (E) 4 European foreword This document (EN 10305-2:2016) has been prepared by Technical Committee ECISS/TC 110 “Steel tubes and iron and steel fittings”, the secretariat of which is held by UNI. 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 September 2016 and conflicting national standards shall be withdrawn at the latest by September 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 10305-2:2010. In comparison with the previous edition, the following technical changes have been made: a) References were adapted; b) The options were renumbered in such a way that now throughout all parts the number of options are the same; c) Editorial updates. EN 10305, Steel tubes for precision applications — Technical delivery conditions, consists of the following parts: — 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 cold sized square and rectangular tubes — Part 6: Welded cold drawn tubes for hydraulic and pneumatic power systems According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 10305-2:2016
EN 10305-2:2016 (E) 5 1 Scope This European Standard specifies the technical delivery conditions for welded cold drawn steel tubes of circular cross section for precision applications with specified outside diameter D
¶ 150 mm. This document may also be applied to other types of cross section. Tubes according to this document are characterized by having precisely defined tolerances on dimensions and a specified maximum surface roughness. Typical fields of application are in the automotive, furniture and general engineering industries. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10020:2000, Definition and classification of grades of steel EN 10021:2006, General technical delivery conditions for steel products EN 10027-1, Designation systems for steels - Part 1: Steel names EN 10027-2, Designation systems for steels - Part 2: Numerical system EN 10052:1993, 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 10266:2003, 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) EN ISO 2566-1, Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO 2566-1) EN ISO 4287, Geometrical product specifications (GPS) - Surface texture: Profile method - Terms, definitions and surface texture parameters (ISO 4287) EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-1) EN ISO 8492, Metallic materials - Tube - Flattening test (ISO 8492) EN ISO 8493, Metallic materials - Tube - Drift-expanding test (ISO 8493) EN ISO 10893-1, Non-destructive testing of steel tubes - Part 1: Automated electromagnetic testing of seamless and welded (except submerged arc-welded) steel tubes for the verification of hydraulic leaktightness (ISO 10893-1) SIST EN 10305-2:2016
EN 10305-2:2016 (E) 6 EN ISO 10893-2, Non-destructive testing of steel tubes - Part 2: Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of imperfections (ISO 10893-2) EN ISO 10893-3, Non-destructive testing of steel tubes - Part 3: Automated full peripheral flux leakage testing of seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for the detection of longitudinal and/or transverse imperfections (ISO 10893-3) EN ISO 10893-10, Non-destructive testing of steel tubes - Part 10: Automated full peripheral ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections (ISO 10893-10) ISO 11484, Steel products - Employer's qualification system for non-destructive testing (NDT) personnel 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 10020:2000, EN 10021:2006, EN 10052:1993, EN 10266:2003 and the following apply. 3.1 employer organization for which a person works on a regular basis Note 1 to entry: The employer can be either the tube manufacturer or a third party organization providing services, such as non-destructive testing (NDT). 3.2 manufacturer party to produce and to deliver tubes in accordance with this document Note 1 to entry: Where tubes are delivered by an intermediary, see EN 10021:2006, Clause 6. 3.3 imperfection discontinuity in the wall or on the pipe surfaces detectable by methods described in this document Note 1 to entry: Imperfections with a size complying with the acceptance criteria specified in this document are considered to have no practical implication on the intended use of the product. 3.4 defect imperfection of a size not complying with the acceptance criteria specified in this document Note 1 to entry: Defects are considered to adversely affect or limit the intended use of the product. 3.5 parent coil coil originating from the hot rolling process prior to any further operation (pickling, slitting, cold rolling or coating) 4 Symbols For the purposes of this document, the symbols in EN 10266:2003 apply. NOTE For tubes specified by the outside diameter and by the inside diameter, “T” is the specified or the calculated wall thickness in this document. SIST EN 10305-2:2016
EN 10305-2:2016 (E) 7 5 Classification and designation 5.1 Classification In accordance with the classification system in EN 10020 the steel grades given in Table 2 are non-alloy quality steels. 5.2 Designation For the tubes covered by this document the steel designation consists of the number of this document (EN 10305-2) plus either: a) the steel name in accordance with EN 10027-1; or b) 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 obtained by the manufacturer at the time of enquiry and order: a) quantity (mass or total length or number); b) term “tube”; c) dimensions (see 8.5); d) steel designation (see 5.2); e) delivery condition (see 7.2.2); f) type of tube length and, where applicable, the length (see 8.5.2); g) type of inspection document (see 9.1). 6.2 Options A number of options are specified in this document and these are listed below. In the event that the purchaser does not indicate a 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).
Option 1: specification of a steel grade not specified in this document (see 8.2);
Option 3: suitability for hot-dip galvanizing (see 8.2);
Option 4: surface condition for further processing (see 8.4.1);
Option 8: measurement of surface roughness (see 8.4.3);
Option 9: specific surface roughness (see 8.4.3);
Option 10: tube surfaces free from not easily removable substances (see 8.4.6);
Option 12: non-destructive testing for the detection of longitudinal imperfections (see 8.4.7); SIST EN 10305-2:2016
EN 10305-2:2016 (E) 8
Option 13: non-destructive testing for verification of leak-tightness (see 8.4.7);
Option 15: specification of a cross section other than circular (see 8.5.1.1);
Option 16: reduced diameter tolerances (see 8.5.1.2);
Option 17: unilateral diameter tolerances (see 8.5.1.2);
Option 18: reduced eccentricity (see 8.5.1.3);
Option 19: reduced wall thickness tolerance (see 8.5.1.4);
Option 20: unilateral wall thickness tolerance (see 8.5.1.4);
Option 22: reduced maximum deviation from straightness (see 8.5.3);
Option 23: specified end finishing (see 8.5.4);
Option 25: flattening or drift expanding test for delivery condition +A or +N (see Table 8);
Option 26: test unit with tubes from one cast only (see 10.1);
Option 28: alternative marking (see Clause 12);
Option 29: delivery without corrosion protection (see Clause 13);
Option 30: specified corrosion protection (see Clause 13);
Option 38: unbundled tubes or specific method of packaging (see Clause 13). 6.3 Example of an order 12 000 m tube with an outside diameter of D = 60 mm and an inside diameter of d = 56 mm in accordance with this document, made of steel grade E235 in the normalized condition, delivered in random lengths, with a 3.1 inspection certificate in accordance with EN 10204: 12 000 m tube – D 60 x d 56 – EN 10305-2 – E235+N – random length – inspection certificate 3.1 7 Manufacturing process 7.1 Steelmaking process The steelmaking process is at the discretion of the manufacturer with the exception that the open hearth (Siemens-Martin) process shall not be employed unless in combination with a secondary steelmaking or ladle refining process. Steels shall be fully killed. NOTE This excludes the use of rimming, balanced or semi-killed steel. 7.2 Tube manufacture and delivery conditions 7.2.1 The tubes shall be manufactured from electric welded hollows by cold drawing. The tubes shall not contain strip end welds. 7.2.2 The tubes shall be supplied in one of the delivery conditions given in Table 1. SIST EN 10305-2:2016
EN 10305-2:2016 (E) 9 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 ISO 11484 or, at least, an equivalent to it. It is recommended that the level 3 personnel be certified in accordance with EN ISO 9712 or, at least, an equivalent to it. 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 appropriate standards, e.g. EN ISO 9712 and ISO 11484. Table 1 — Delivery conditions Designation Symbola Description Cold drawn / hard +C No final heat treatment after final cold drawing. Cold drawn / soft +LC Final heat treatment is followed by a suitable drawing pass (limited reduction of area). Cold drawn and stress relieved +SR After final cold drawing the tubes are stress relieved in a controlled atmosphere. Soft annealed +A After final cold drawing the tubes are annealed in a controlled atmosphere. Normalized +N After final cold drawing the tubes are normalized in a controlled atmosphere. a In accordance with EN 10027-1. 8 Requirements 8.1 General The tubes, when supplied in a delivery condition indicated in Table 1 and inspected in accordance with Clauses 9, 10 and 11, shall comply with the requirements of this document. In addition, the general technical delivery requirements specified in EN 10021 apply. 8.2 Chemical composition The cast analysis reported by the steel producer shall apply and comply with the requirements of Table 2 (but see options 1 and 3). NOTE When subsequently welding tubes produced in accordance with this document, it is important take account of the fact that the behaviour of the steel during and after welding is dependent not only on the steel composition and the delivery condition but also on the conditions of preparing for and carrying out the welding. Option 1: A steel grade not specified in this document with a maximum total content of alloying elements of 5 % and agreed chemical composition, mechanical properties and delivery condition, is specified. SIST EN 10305-2:2016
EN 10305-2:2016 (E) 10 Table 2 — Chemical composition (cast analysis) Steel grade % by mass Steel name Steel number C max. Si max. Mn max. P max. S max. Altotal a min. E155 1.0033 0,11 0,35 0,70 0,025 0,025 0,015 E195 1.0034 0,15 0,35 0,70 0,025 0,025 0,015 E235 1.0308 0,17 0,35 1,20 0,025 0,025 0,015 E275 1.0225 0,21 0,35 1,40 0,025 0,025 0,015 E355 1.0580 0,22 0,55 1,60 0,025 0,025 0,020 Elements not quoted in this table (but see footnote a) shall not be intentionally added to the steel without the agreement of the purchaser, except for elements which may be added for the purposes of deoxidation and/or nitrogen binding. All appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steel making process. a This requirement is not applicable provided the steel contains a sufficient amount of other nitrogen binding elements, such as Ti, Nb or V. If added, the content of these elements shall be reported in the inspection document. When using titanium, the manufacturer shall verify that (Al + Ti/2)
· 0,020. Option 3: The composition of the specified steel grade shall be such that it is suitable for hot-dip galvanizing (see e.g. EN ISO 1461 or EN ISO 14713-2 for guidance). Table 3 specifies the permissible deviation of product analysis from the specified limits on cast analysis given in Table 2. Table 3 — Permissible deviations of the product analysis from the specified limits on cast analysis given in Table 2 Element Limiting value for cast analysis in accordance with Table 2 % by mass Permissible deviation of the product analysis % by mass C
¶ 0,22 + 0,02 Si
¶ 0,55 + 0,05 Mn
¶ 1,60 + 0,10 P
¶ 0,025 + 0,005 S
¶ 0,025 + 0,005 Al
· 0,015 - 0,005 8.3 Mechanical properties The mechanical properties of the tubes shall conform to the requirements of Table 4 and, if applicable, 11.2 or 11.3. NOTE Subsequent processing (cold or hot) may change the mechanical properties. SIST EN 10305-2:2016
EN 10305-2:2016 (E) 11 Table 4 — Mechanical properties at room temperature Steel grade Minimum values for the delivery conditiona
+Cb +LCb +SR +Ac +N Steel name Steel number Rm MPa A % Rm MPa A % Rm MPa ReH MPa A % Rm MPa A % Rm MPa ReHd MPa A % E155 1.0033 400 6 350 10 350 245 18 260 28 270 to 410 155 28 E195 1.0034 420 6 370 10 370 260 18 290 28 300 to 440 195 28 E235 1.0308 490 6 440 10 440 325 14 315 25 340 to 480 235 25 E275 1.0225 560 5 510 8 510 375 12 390 22 410 to 550 275 22 E355 1.0580 640 4 590 6 590 435 10 450 22 490 to 630 355 22 a Rm: tensile strength; ReH: upper yield strength (but see 11.1); A: elongation after fracture. For symbols for the
delivery condition see Table 1. b Depending on the degree of cold work in the finishing pass the yield strength may nearly be as high as the tensile
strength. For calculation purposes the following relations are recommended:
— for delivery condition +C: ReH
· 0,8 Rm;
— for delivery condition +LC: ReH
· 0,7 Rm. c
For calculation purposes the following relation is recommended: ReH
· 0,5 Rm. d
For tubes with outside diameter
¶ 30 mm and wall thickness
¶ 3 mm the ReH minimum values are 10 MPa lower
than the values given in this table. 8.4 Appearance and internal soundness 8.4.1 The internal and external surface finish of the tubes shall be typical of the manufacturing process and, where applicable, the heat treatment employed. Option 4: A surface condition suitable for special further processing is specified by the purchaser. Normally, the finish and surface condition shall be such that any surface imperfections requiring dressing can be identified. Any surface imperfections, which in accordance with the manufacturer's experience might be considered defects as specified in 8.4.4, shall be dressed in accordance with 8.4.5, or the tube or part of tube shall be rejected. 8.4.2 The tubes shall have smooth outer and inner surfaces with a roughness Ra
¶ 4 µm. 8.4.3 Verification of surface roughness and/or improved levels of roughness may be specified (see options 8 and 9). Option 8: The surface roughness shall be measured in accordance with 11.5 and reported. Option 9: A specific surface roughness of agreed type and limiting value is specified. The roughness shall be measured and reported. 8.4.4 Surface imperfections which encroach on the specified minimum wall thickness shall be considered defects and tubes containing these shall be deemed not to conform to this document. SIST EN 10305-2:2016
EN 10305-2:2016 (E) 12 8.4.5 It shall be permissible to dress, only by grinding or machining, surface imperfections provided that, after doing so, the wall thickness in the dressed area is not less than the specified minimum wall thickness. All dressed areas shall blend smoothly into the contour of the tube. 8.4.6 Tubes in the delivery condition +C or +LC normally have thin layers of lubricant and lubricant carrier as a result of the cold finishing process. Tubes in the delivery condition +SR may have thin layers of lubricant and lubricant carrier partially transformed during stress relieve annealing. Tubes in the delivery condition +SR, +A or +N shall be free of loose scale but may show discoloration. Option 10: The tube surfaces shall only bear residual substances which can be easily removed during processing of the tube. Specific requirements shall be agreed at the time of enquiry and order. 8.4.7 Verification of internal soundness by non-destructive testing may be specified by the purchaser (see options 12 and 13). Option 12: Non-destructive testing for the detection of longitudinal imperfections in accordance with 11.7.1 is specified. Option 13: Non-destructive testing for verification of leak tightness in accordance with 11.7.2 is specified. 8.5 Dimensions and tolerances 8.5.1 Outside diameter, inside diameter, wall thickness and eccentricity 8.5.1.1 Circular tubes shall be specified by the outside and the inside diameter or by outside diameter and wall thickness or by inside diameter and wall thickness, as appropriate. Cross sections other than circular may be specified (see option 15). Option 15: A cross section other than circular is specified. 8.5.1.2 Preferred diameters and wall thicknesses as well as diameter tolerances are given in Table 5. For intermediate sizes the tolerances of the next greater size apply. The diameter tolerances include the out-of-roundness. For a maximum distance of 100 mm, the ends may, due to the cutting method, have diameters outside the tolerances. The diameter tolerances given in Table 5 apply for tubes in delivery condition +C or +LC. Depending on the ratio of wall thickness and outside diameter the corresponding tolerances of heat treated tubes in delivery condition +SR, +A and
...
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Präzisionsstahlrohre - Technische Lieferbedingungen - Teil 2: Geschweißte kaltgezogene RohreTubes de précision en acier - Conditions techniques de livraison - Partie 2 : Tubes soudés étirés à froidSteel tubes for precision applications - Technical delivery conditions - Part 2: Welded cold drawn tubes77.140.75Jeklene cevi in cevni profili za posebne nameneSteel pipes and tubes for specific useICS:Ta slovenski standard je istoveten z:FprEN 10305-2 revkSIST FprEN 10305-2:2015en,fr,de01-november-2015kSIST FprEN 10305-2:2015SLOVENSKI
STANDARD
kSIST FprEN 10305-2:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 10305-2
July 2015 ICS 77.140.75 Will supersede EN 10305-2:2010English Version
Steel tubes for precision applications - Technical delivery conditions - Part 2: Welded cold drawn tubes
Tubes de précision en acier - Conditions techniques de livraison - Partie 2 : Tubes soudés étirés à froid
Präzisionsstahlrohre - Technische Lieferbedingungen - Teil 2: Geschweißte kaltgezogene Rohre This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee ECISS/TC 110.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Former Yugoslav Republic of Macedonia, 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN 10305-2:2015 EkSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 2 Contents Page Foreword .4 1 Scope .5 2 Normative references .5 3 Terms and definitions .6 4 Symbols .6 5 Classification and designation .7 5.1 Classification .7 5.2 Designation .7 6 Information to be supplied by the purchaser .7 6.1 Mandatory information .7 6.2 Options .7 6.3 Example of an order .8 7 Manufacturing process .8 7.1 Steelmaking process .8 7.2 Tube manufacture and delivery conditions .8 8 Requirements .9 8.1 General .9 8.2 Chemical composition .9 8.3 Mechanical properties . 10 8.4 Appearance and internal soundness . 11 8.5 Dimensions and tolerances . 12 8.5.1 Outside diameter, inside diameter, wall thickness and eccentricity . 12 8.5.2 Lengths . 14 8.5.3 Straightness . 15 8.5.4 Preparation of ends . 16 9 Inspection . 16 9.1 Types of inspection . 16 9.2 Inspection documents . 16 9.2.1 Types of inspection documents . 16 9.2.2 Content of inspection documents . 16 9.3 Summary of inspection and testing . 17 10 Sampling . 17 10.1 Test unit . 17 10.2 Preparation of samples and test pieces . 18 10.2.1 Location, orientation and preparation of samples and test pieces for mechanical tests . 18 10.2.2 Test pieces for roughness measurement . 18 11 Test methods . 18 11.1 Tensile test . 18 11.2 Flattening test . 18 11.3 Drift expanding test . 19 11.4 Dimensional inspection . 19 11.5 Roughness measurement . 19 11.6 Visual examination . 20 11.7 Non-destructive testing . 20 11.7.1 Testing for longitudinal imperfections . 20 11.7.2 Leak tightness . 20 kSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 3 11.8 Retests, sorting and reprocessing . 20 12 Marking . 20 13 Protection and packaging. 20 Bibliography . 22
kSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 4 Foreword This document (FprEN 10305-2:2015) has been prepared by Technical Committee ECISS/TC 110 “Steel tubes and iron and steel fittings”, the secretariat of which is held by UNI. This document is currently submitted to the Unique Acceptance Procedure. This document will supersede EN 10305-2:2010. EN 10305, Steel tubes for precision applications — Technical delivery conditions, consists of the following parts: — 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 cold sized square and rectangular tubes — Part 6: Welded cold drawn tubes for hydraulic and pneumatic power systems kSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 5 1 Scope This European Standard specifies the technical delivery conditions for welded cold drawn steel tubes of circular cross section for precision applications with specified outside diameter D ≤ 150 mm. NOTE This document may also be applied to other types of cross section. Tubes according to this document are characterized by having precisely defined tolerances on dimensions and a specified maximum surface roughness. Typical fields of application are in the automotive, furniture and general engineering industries. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10020:2000, Definition and classification of grades of steel EN 10021:2006, General technical delivery conditions for steel products EN 10027-1, Designation systems for steels — Part 1: Steel names EN 10027-2, Designation systems for steels — Part 2: Numerical system EN 10052:1993, 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 10266:2003, 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) EN ISO 2566-1, Steel - Conversion of elongation values — Part 1: Carbon and low alloy steels (ISO 2566-1) EN ISO 4287, Geometrical product specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface texture parameters (ISO 4287) EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature (ISO 6892-1) EN ISO 8492, Metallic materials — Tube — Flattening test (ISO 8492) EN ISO 8493, Metallic materials — Tube — Drift-expanding test (ISO 8493) EN ISO 10893-1, Non-destructive testing of steel tubes — Part 1: Automated electromagnetic testing of seamless and welded (except submerged arc-welded) steel tubes for the verification of hydraulic leaktightness (ISO 10893-1) EN ISO 10893-2, Non-destructive testing of steel tubes — Part 2: Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of imperfections (ISO 10893-2) kSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 6 EN ISO 10893-3, Non-destructive testing of steel tubes — Part 3: Automated full peripheral flux leakage testing of seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for the detection of longitudinal and/or transverse imperfections (ISO 10893-3) EN ISO 10893-10, Non-destructive testing of steel tubes — Part 10: Automated full peripheral ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections (ISO 10893-10) ISO 11484, Steel products — Employer's qualification system for non-destructive testing (NDT) personnel 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 10020:2000, EN 10021:2006, EN 10052:1993, EN 10266:2003 and the following apply. 3.1 employer organization for which a person works on a regular basis Note 1 to entry: The employer can be either the tube manufacturer or a third party organization providing services, such as non-destructive testing (NDT). 3.2 manufacturer party to produce and to deliver tubes in accordance with this document Note 1 to entry: Where tubes are delivered by an intermediary, see EN 10021:2006, Clause 6. 3.3 imperfection discontinuity in the wall or on the pipe surfaces detectable by methods described in this document Note 1 to entry: Imperfections with a size complying with the acceptance criteria specified in this document are considered to have no practical implication on the intended use of the product. 3.4 defect imperfection of a size not complying with the acceptance criteria specified in this document Note 1 to entry: Defects are considered to adversely affect or limit the intended use of the product. 3.5 parent coil coil originating from the hot rolling process prior to any further operation (pickling, slitting, cold rolling or coating) 4 Symbols For the purposes of this document, the symbols in EN 10266:2003 apply. NOTE For tubes specified by the outside diameter and by the inside diameter, “T” is the specified or the calculated wall thickness in this document. kSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 7 5 Classification and designation 5.1 Classification In accordance with the classification system in EN 10020 the steel grades given in Table 2 are non-alloy quality steels. 5.2 Designation For the tubes covered by this document the steel designation consists of the number of this document (EN 10305-2) plus either: a) the steel name in accordance with EN 10027-1; or b) 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 obtained by the manufacturer at the time of enquiry and order: a) quantity (mass or total length or number); b) term “tube”; c) dimensions (see 8.5); d) steel designation (see 5.2); e) delivery condition (see 7.2.2); f) type of tube length and, where applicable, the length (see 8.5.2); g) type of inspection document (see 9.1). 6.2 Options A number of options are specified in this document and these are listed below. In the event that the purchaser does not indicate a 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). • Option 1: specification of a steel grade not specified in this document (see 8.2); • Option 3: suitability for hot-dip galvanizing (see 8.2); • Option 4: surface condition for further processing (see 8.4.1); • Option 8: measurement of surface roughness (see 8.4.3); • Option 9: specific surface roughness (see 8.4.3); • Option 10: tube surfaces free from not easily removable substances (see 8.4.6); • Option 12: non-destructive testing for the detection of longitudinal imperfections (see 8.4.7); kSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 8 • Option 13: non-destructive testing for verification of leak-tightness (see 8.4.7); • Option 15: specification of a cross section other than circular (see 8.5.1.1); • Option 16: reduced diameter tolerances (see 8.5.1.2); • Option 17: unilateral diameter tolerances (see 8.5.1.2); • Option 18: reduced eccentricity (see 8.5.1.3); • Option 19: reduced wall thickness tolerance (see 8.5.1.4); • Option 20: unilateral wall thickness tolerance (see 8.5.1.4); • Option 22: reduced maximum deviation from straightness (see 8.5.3); • Option 23: specified end finishing (see 8.5.4); • Option 25: flattening or drift expanding test for delivery condition +A or +N (see Table 8); • Option 26: test unit with tubes from one cast only (see 10.1); • Option 28: alternative marking (see Clause 12); • Option 29: delivery without corrosion protection (see Clause 13); • Option 30: specified corrosion protection (see Clause 13); • Option 38: unbundled tubes or specific method of packaging (see Clause 13). 6.3 Example of an order 12 000 m tube with an outside diameter of D = 60 mm and an inside diameter of d = 56 mm in accordance with this document, made of steel grade E235 in the normalized condition, delivered in random lengths, with a 3.1 inspection certificate in accordance with EN 10204: 12 000 m tube – D 60 x d 56 – EN 10305-2 – E235 +N – random length inspection certificate 3.1 7 Manufacturing process 7.1 Steelmaking process The steelmaking process is at the discretion of the manufacturer with the exception that the open hearth (Siemens-Martin) process shall not be employed unless in combination with a secondary steelmaking or ladle refining process. Steels shall be fully killed. NOTE This excludes the use of rimming, balanced or semi-killed steel. 7.2 Tube manufacture and delivery conditions 7.2.1 The tubes shall be manufactured from electric welded hollows by cold drawing. The tubes shall not contain strip end welds. 7.2.2 The tubes shall be supplied in one of the delivery conditions given in Table 1. kSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 9 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 ISO 11484 or, at least, an equivalent to it. It is recommended that the level 3 personnel be certified in accordance with ISO 9712 or, at least, an equivalent to it. 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 appropriate standards, e.g. ISO 9712 and ISO 11484. Table 1 — Delivery conditions Designation Symbola Description Cold drawn / hard +C No final heat treatment after final cold drawing. Cold drawn / soft +LC Final heat treatment is followed by a suitable drawing pass (limited reduction of area). Cold drawn and stress relieved +SR After final cold drawing the tubes are stress relieved in a controlled atmosphere. Soft annealed +A After final cold drawing the tubes are annealed in a controlled atmosphere. Normalized +N After final cold drawing the tubes are normalized in a controlled atmosphere. a In accordance with EN 10027–1. 8 Requirements 8.1 General The tubes, when supplied in a delivery condition indicated in Table 1 and inspected in accordance with Clauses 9, 10 and 11, shall comply with the requirements of this document. In addition, the general technical delivery requirements specified in EN 10021 apply. 8.2 Chemical composition The cast analysis reported by the steel producer shall apply and comply with the requirements of Table 2 (but see options 1 and 3). When welding tubes produced in accordance with this document account should be taken of the fact that the behaviour of the steel during and after welding is dependent not only on the steel composition and the delivery condition but also on the conditions of preparing for and carrying out the welding. Option 1: A steel grade not specified in this document with a maximum total content of alloying elements of 5 % and agreed chemical composition, mechanical properties and delivery condition, is specified. Where the steel grade specified is a strip grade, customers should be aware of the fact that the mechanical properties of the tube may be considerably different to those of the strip. Accordingly, in such cases, mechanical properties for the tube should be agreed between the manufacturer and customer at the time of enquiry and order. kSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 10 Table 2 — Chemical composition (cast analysis) Steel grade % by mass Steel name Steel number C max. Si max. Mn max. P max. S max. Altotal a min. E155 1.0033 0,11 0,35 0,70 0,025 0,025 0,015 E195 1.0034 0,15 0,35 0,70 0,025 0,025 0,015 E235 1.0308 0,17 0,35 1,20 0,025 0,025 0,015 E275 1.0225 0,21 0,35 1,40 0,025 0,025 0,015 E355 1.0580 0,22 0,55 1,60 0,025 0,025 0,020 Elements not quoted in this table (but see footnote a) shall not be intentionally added to the steel without the agreement of the purchaser, except for elements which may be added for the purposes of deoxidation and/or nitrogen binding. All appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steel making process. a This requirement is not applicable provided the steel contains a sufficient amount of other nitrogen binding elements, such as Ti, Nb or V. If added, the content of these elements shall be reported in the inspection document. When using titanium, the manufacturer shall verify that (Al + Ti/2) ≥ 0,020. Option 3: The composition of the specified steel grade shall be such that it is suitable for hot-dip galvanizing (see e.g. EN ISO 1461 or EN ISO 14713-2 for guidance). Table 3 specifies the permissible deviation of product analysis from the specified limits on cast analysis given in Table 2. Table 3 — Permissible deviations of the product analysis from the specified limits on cast analysis given in Table 2 Element Limiting value for cast analysis in accordance with Table 2 % by mass Permissible deviation of the product analysis % by mass C ≤ 0,22 + 0,02 Si ≤ 0,55 + 0,05 Mn ≤ 1,60 + 0,10 P ≤ 0,025 + 0,005 S ≤ 0,025 + 0,005 Al ≥ 0,015 - 0,005 8.3 Mechanical properties The mechanical properties of the tubes shall conform to the requirements of Table 4 and, if applicable, 11.2 or 11.3. NOTE Subsequent processing (cold or hot) may change the mechanical properties. kSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 11 Table 4 — Mechanical properties at room temperature Steel grade Minimum values for the delivery conditiona
+Cb +LCb +SR +Ac +N Steel name Steel number Rm MPa A % Rm MPa A % Rm MPa ReH MPa A % Rm MPa A % Rm MPa ReHd MPa A % E155 1.0033 400 6 350 10 350 245 18 260 28 270 to 410 155 28 E195 1.0034 420 6 370 10 370 260 18 290 28 300 to 440 195 28 E235 1.0308 490 6 440 10 440 325 14 315 25 340 to 480 235 25 E275 1.0225 560 5 510 8 510 375 12 390 22 410 to 550 275 22 E355 1.0580 640 4 590 6 590 435 10 450 22 490 to 630 355 22 a Rm: tensile strength; ReH: upper yield strength (but see 11.1); A: elongation after fracture. For symbols for the delivery condition see Table 1. b Depending on the degree of cold work in the finishing pass the yield strength may nearly be as high as the tensile strength. For calculation purposes the following relations are recommended: — for delivery condition +C: ReH ≥ 0,8 Rm; — for delivery condition +LC: ReH ≥ 0,7 Rm. c For calculation purposes the following relation is recommended: ReH ≥ 0,5 Rm. d For tubes with outside diameter ≤ 30 mm and wall thickness ≤ 3 mm the ReH minimum values are 10 MPa lower than the values given in this table. 8.4 Appearance and internal soundness 8.4.1 The internal and external surface finish of the tubes shall be typical of the manufacturing process and, where applicable, the heat treatment employed. Option 4: A surface condition suitable for special further processing is specified by the purchaser. Normally, the finish and surface condition shall be such that any surface imperfections requiring dressing can be identified. Any surface imperfections, which in accordance with the manufacturer's experience might be considered defects as specified in 8.4.4, shall be dressed in accordance with 8.4.5, or the tube or part of tube shall be rejected. 8.4.2 The tubes shall have smooth outer and inner surfaces with a roughness Ra ≤ 4 µm. 8.4.3 Verification of surface roughness and/or improved levels of roughness may be specified (see options 8 and 9). Option 8: The surface roughness shall be measured in accordance with 11.5 and reported. Option 9: A specific surface roughness of agreed type and limiting value is specified. The roughness shall be measured and reported. 8.4.4 Surface imperfections which encroach on the specified minimum wall thickness shall be considered defects and tubes containing these shall be deemed not to conform to this document. 8.4.5 It shall be permissible to dress, only by grinding or machining, surface imperfections provided that, after doing so, the wall thickness in the dressed area is not less than the specified minimum wall thickness. All dressed areas shall blend smoothly into the contour of the tube. kSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 12 8.4.6 Tubes in the delivery condition +C or +LC normally have thin layers of lubricant and lubricant carrier as a result of the cold finishing process. Tubes in the delivery condition +SR may have thin layers of lubricant and lubricant carrier partially transformed during stress relieve annealing. Tubes in the delivery condition +SR, +A or +N shall be free of loose scale but may show discoloration. Option 10: The tube surfaces shall only bear residual substances which can be easily removed during processing of the tube. Specific requirements shall be agreed at the time of enquiry and order. 8.4.7 Verification of internal soundness by non-destructive testing may be specified by the purchaser (see options 12 and 13). Option 12: Non-destructive testing for the detection of longitudinal imperfections in accordance with 11.7.1 is specified. Option 13: Non-destructive testing for verification of leak tightness in accordance with 11.7.2 is specified. 8.5 Dimensions and tolerances 8.5.1 Outside diameter, inside diameter, wall thickness and eccentricity 8.5.1.1 Circular tubes shall be specified by the outside and the inside diameter or by outside diameter and wall thickness or by inside diameter and wall thickness, as appropriate. Cross sections other than circular may be specified (see option 15). Option 15: A cross section other than circular is specified. 8.5.1.2 Preferred diameters and wall thicknesses as well as diameter tolerances are given in Table 5. For intermediate sizes the tolerances of the next greater size apply. The diameter tolerances include the out-of-roundness. For a maximum distance of 100 mm, the ends may, due to the cutting method, have diameters outside the tolerances. The diameter tolerances given in Table 5 apply for tubes in delivery condition +C or +LC. Depending on the ratio of wall thickness and outside diameter the corresponding tolerances of heat treated tubes in delivery condition +SR, +A and +N are given by consideration of the corrective factors in Table 6. Other diameter tolerances may be specified (see options 16 and 17). kSIST FprEN 10305-2:2015
FprEN 10305-2:2015 (E) 13 Table 5 — Sizes and tolerances Dimensions in millimetres Specified outside diameter D and tolerances Wall thickness T 0,5 0,8 1 1,2 1,5 1.8 2 2,2 2,5 2,8 3 3,5 4 4,5 5 5,5 6 7 8 9 10 Specified inside diameter d and tolerances 4 ±0,08 3 ± 0,15 2,4 ± 0,15 2 ± 0,15
5
4 ± 0,15 3,4 ± 0,15 3 ± 0,15
6
5 ± 0,15 4,4 ± 0,15 4 ± 0,15
7
6 ± 0,15 5,4 ± 0,15 5 ± 0,15 4,6 ± 0,15 4 ± 0,15
8
7 ± 0,15 6,4 ± 0,15 6 ± 0,15 5,6 ± 0,15 5 ± 0,15
9
8 ± 0,15 7,4 ± 0,15 7 ± 0,15 6,6 ± 0,15 6 ± 0,15
10
9 ± 0,15 8,4 ± 0,15 8 ± 0,15 7,6 ± 0,15 7 ± 0,15 6,4 ± 0,15 6 ± 0,15
12
11 ± 0,15 10,4 ± 0,15 10 ± 0,15 9,6 ± 0,15 9 ± 0,15 8,4 ±
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