SIST EN 10296-1:2003
(Main)Welded circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 1: Non-alloy and alloy steel tubes
Welded circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 1: Non-alloy and alloy steel tubes
This part of EN 10296 specifies the technical delivery conditions for electric welded, laser beam welded and submerged arc welded tubes of circular cross section made of non-alloy and alloy steels for mechanical and general engineering purposes.
Geschweißte kreisförmige Stahlrohre für den Maschinenbau und allgemeine technische Anwendungen - Technische Lieferbedingungen - Teil 1: Rohre aus unlegierten und legierten Stählen
Dieser Teil der EN 10296 enthält die technischen Lieferbedingungen für elektrisch geschweißte, laserstrahl-geschweißte und unterpulvergeschweißte Rohre mit kreisförmigem Querschnitt aus unlegierten und legierten Stählen, die für die Anwendung im Maschinenbau und für allgemeine technische Anwendungen bestimmt sind.
Tubes ronds soudés en acier pour utilisation en mécanique générale et en construction mécanique - Conditions techniques de livraison - Partie 1 : Tubes en acier non allié et allié
La présente partie de l'EN 10296 spécifie les conditions techniques de livraison des tubes a section circulaire en acier non allié et allié soudés électriquement, par laser et a l'arc immergé sous flux en poudre, pour utilisation en mécanique générale et en construction mécanique.
Okrogle varjene jeklene cevi za strojništvo in splošno uporabo v tehniki – Tehnični dobavni pogoji – 1. del: Cevi iz nelegiranih in legiranih jekel
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Geschweißte kreisförmige Stahlrohre für den Maschinenbau und allgemeine technische Anwendungen - Technische Lieferbedingungen - Teil 1: Rohre aus unlegierten und legierten StählenTubes ronds soudés en acier pour utilisation en mécanique générale et en construction mécanique - Conditions techniques de livraison - Partie 1 : Tubes en acier non allié et alliéWelded circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 1: Non-alloy and alloy steel tubes77.140.75Jeklene cevi in cevni profili za posebne nameneSteel pipes and tubes for specific useICS:Ta slovenski standard je istoveten z:EN 10296-1:2003SIST EN 10296-1:2003en01-november-2003SIST EN 10296-1:2003SLOVENSKI
STANDARD
SIST EN 10296-1:2003
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10296-1June 2003ICS 77.140.75English versionWelded circular steel tubes for mechanical and generalengineering purposes - Technical delivery conditions - Part 1:Non-alloy and alloy steel tubesTubes ronds soudés en acier pour utilisation en mécaniquegénérale et en construction mécanique - Conditionstechniques de livraison - Partie 1: Tubes en acier non alliéet alliéGeschweißte kreisförmige Stahlrohre für denMaschinenbau und allgemeine technische Anwendungen -Technische Lieferbedingungen - Teil 1: Rohre ausunlegierten und legierten StählenThis European Standard was approved by CEN on 20 February 2003.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 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10296-1:2003 ESIST EN 10296-1:2003
EN 10296-1:2003 (E)2ContentsPageForeword.31Scope.42Normative references.43Terms and definitions.54Symbols.65Classification and designation.65.1Classification.65.2Designation.66Information to be supplied by the purchaser.66.1Mandatory information.66.2Options.76.3Example of an order.77Manufacturing process.77.1Steelmaking process.77.2Deoxidation process.87.3Tube manufacture and delivery conditions.88Requirements.98.1General.98.2Chemical composition.98.3Mechanical properties.118.4Appearance and soundness.138.5Straightness.148.6End preparation.148.7Dimensions, masses, tolerances and sectional properties.149Inspection.189.1Types of inspection.189.2Inspection documents.199.3Summary of inspection and testing.2010Sampling.2110.1Frequency of tests.2110.2Preparation of samples and test pieces.2211Test methods.2311.1Tensile test on the parent material.2311.2Transverse tensile test on the weld.2311.3Flattening test.2311.4Drift Expanding Test.2311.5Bend test on full section tube.2411.6Weld Bend Test.2411.7Impact test.2411.8Leak tightness test.2511.9Dimensional inspection.2511.10Visual examination.2511.11Non-destructive testing of the weld.2511.12Retests, sorting and reprocessing.2612Marking.2613Protection.26Annex A (informative)
Typical range of dimensions for tube manufacturing processes.27Annex B (normative)
Formulae for calculation of nominal sectional properties.28Bibliography.29SIST EN 10296-1:2003
EN 10296-1:2003 (E)3ForewordThis document (EN 10296-1:2003) has been prepared by Technical Committee ECISS/TC 29, "Steel tubes andfittings for steel tubes", 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 orby endorsement, at the latest by December 2003, and conflicting national standards shall be withdrawn at the latestby December 2003.Another part of EN 10296 in course of preparation is :— Part 2: Stainless steel tubesAnother European Standard series covering seamless steel tubes for mechanical and general engineeringpurposes is currently being prepared.— EN 10297: Seamless circular steel tubes for mechanical and general engineering purposes — Technicaldelivery conditions.Other European Standard series being prepared in this area are prEN 10294 for hollow bars for machining andprEN 10305 for steel tubes for precision applications.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 10296-1:2003
EN 10296-1:2003 (E)41 ScopeThis Part of EN 10296 specifies the technical delivery conditions for electric welded, laser beam welded andsubmerged arc welded tubes of circular cross section made of non-alloy and alloy steels for mechanical andgeneral engineering purposes.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 910, Destructive tests on welds in metallic materials - Bend tests.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 steel - Part 1: Steel names, principal symbols.EN 10027-2, Designation systems for steel - Part 2: Numerical system.EN 10045-1, Metallic materials - Charpy Impact test - Part 1: Test method.EN 10052, Vocabulary of heat treatment terms for ferrous products.prEN 101681), Steel products - Inspection documents – List of information and description.EN 10204, Metallic
products - Types of inspection documents.EN 10220, Seamless and welded steel tubes – Dimensions and masses per unit length.EN 10232, Metallic materials - Tube (in full section) - Bend test.EN 10233, Metallic materials - Tube - Flattening test.EN 10234, Metallic materials - Tube - Drift expanding test.EN 10246-1, Non-destructive testing of steel tubes - Part 1: Automatic electromagnetic testing of seamless andwelded (except submerged arc-welded) ferromagnetic steel tubes for verification of hydraulic leak-tightness.EN 10246-3, Non-destructive testing of steel tubes - Part 3: Automatic eddy current testing of seamless and welded(except submerged arc-welded) steel tubes for the detection of imperfections.EN 10246-5, Non-destructive testing of steel tubes - Part 5: Automatic full peripheral magnetic transducer/fluxleakage testing of seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for the detectionof longitudinal imperfections.EN 10246-7, Non-destructive testing of steel tubes - Part 7: Automatic full peripheral ultrasonic testing of seamlessand welded (except submerged arc-welded) steel tubes for the detection of longitudinal imperfections.
1)In preparation; until this document is published as a European Standard, a corresponding national standard should be agreed at the time ofenquiry and order.SIST EN 10296-1:2003
EN 10296-1:2003 (E)5EN 10246-8, Non-destructive testing of steel tubes - Part 8: Automatic ultrasonic testing of the weld seam ofelectric welded steel tubes for the detection of longitudinal imperfections.EN 10246-9, Non-destructive testing of steel tubes - Part 9: Automatic ultrasonic testing of the weld seam ofsubmerged arc-welded steel tubes for the detection of longitudinal and/or transverse imperfections.EN 10246-10, Non-destructive testing of steel tubes - Part 10: Radiographic testing of the weld seam of automaticfusion arc welded steel tubes for the detection of imperfections.EN 10256, Non-destructive testing of steel tubes – Qualification and competence of level 1 and
2 non-destructivetesting personnel.CR 10260, Designation systems for steel - Additional symbols.prEN 102662), Steel tubes, fittings and structural hollow sections – Symbols and definitions of terms for use inproduct standards.EN ISO 377, Steel and steel products - Location and preparation of samples and test pieces for mechanical testing(ISO 377:1997).EN ISO 643 , Steels - Micrographic determination of the apparent grain size (ISO/DIS 643:2003).EN ISO 2566-1, Steel – Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO 2566-1:1984).3 Terms and definitionsFor the purposes of this Part of EN 10296, the terms and definitions given in EN 10020, EN 10021, EN 10052 andprEN 10266 and the following apply.3.1fine grain steelsteel having an austenitic/ferritic grain size equal to or finer than 6 when measured in accordance with EN ISO 643.3.2normalizing rollingrolling process in which the final deformation is carried out in a certain temperature range leading to a materialcondition equivalent to that obtained after normalizing so that the specified values of the mechanical properties areretained even after normalizing (+N)3.3thermomechanical rollingrolling process in which the final deformation is carried out in a certain temperature range leading to a materialcondition with certain properties which cannot be achieved or repeated by heat treatment aloneNOTE 1The abbreviated form of this delivery condition is M.NOTE 2Subsequent heating above 580°C may lower the strength values. If temperatures above 580°C are neededreference should be made to the supplier.NOTE 3 Thermomechanical rolling leading to the delivery condition M can include processes with an increasing cooling ratewith or without tempering including self-tempering but excluding direct quenching and tempering.3.4hot reducingprocess in which the outside diameter of a tube is reduced by a rolling and/or stretching process after heating intothe austenitic region (i.e. above Ac3)
2)In preparation; until this document is published as a European Standard, a corresponding national standard should be agreed at the time ofenquiry and order.SIST EN 10296-1:2003
EN 10296-1:2003 (E)6NOTEThe thickness can be increased or decreased during processing.3.5annealingheat treatment at a temperature slightly below Ac1 (+A)3.6employerorganisation for which the person works on a regular basisNOTEThe employer may be either the tube manufacturer or a third party organisation providing non-destructive testing(NDT) services.4 SymbolsFor the purpose of this Part of EN 10296, the symbols given in prEN 10266 and CR 10260 apply.5 Classification and designation5.1 ClassificationIn accordance with EN 10020 the grades in Table 2 and the grade E275K2 are non-alloy quality steels, gradeE355K2 is an alloy quality steel, grade E460K2 and the grades in Table 4 are alloy special steels.5.2 Designation5.2.1For tubes covered by this Part of EN 10296 the steel designation consists of :¾ the number of this part of EN 10296 (EN 10296-1);plus either:¾ the steel name in accordance with EN 10027-1 and CR 10260; or¾ the steel number allocated in accordance with EN 10027-2;The steel name is designated by:¾ the capital letter E for engineering steels;¾ the specified minimum yield strength (Re) MPa for T £ 16 mm;NOTE The specified minimum yield strength varies with delivery condition and may be higher or lower than the designatedvalue.¾ the alphanumeric K2 for steels with specified impact energy of 40 J at - 20°C;¾ the letter M when the strip or plate is produced by a thermomechanical rolling process.6 Information to be supplied by the purchaser6.1 Mandatory informationThe following information shall be supplied by the purchaser at the time of enquiry and order:1) the quantity (mass or total length or number);SIST EN 10296-1:2003
EN 10296-1:2003 (E)72) the term "tube";3) the dimensions (outside diameter, wall thickness) (see 8.7);4) the steel designation according to this Part of EN 10296 (see 5.2).6.2 OptionsA number of options are specified in EN 10296-1, and are listed below with appropriate clause references.
In theevent that the purchaser does not indicate his wish to implement any of these options at the time of enquiry andorder the tube shall be supplied in accordance with the basic specification (see 6.1).1) Process of tube manufacture (see 7.3.1);2) delivery condition of EW (see 7.3.2);3) tube shall be supplied descaled (see 7.3.2);4) EW tubes shall be produced from pickled strip (see 7.3.2);5) non-destructive testing of the weld (see 8.4.2);6) a leak tightness test (see 8.4.2);7) random lengths (see 8.7.2);8) exact lengths (see 8.7.2);9) restriction of the residual height of the internal weld bead of EW tube (see 8.7.3.1);10) specific inspection and testing for tube made of non-alloy quality steel (see 5.1 and 9.1);11) inspection document type 2.2 (see 9.2.1);12) inspection document type 3.1.A, 3.1.C or 3.2 (see 9.2.1);13) flattening test or drift expanding or
bend test (whole tube) (see 9.3);14) selection of leak tightness test method for EW tube (see 11.8.1);15) special coating for transit and storage (see clause 13).6.3 Example of an orderFifteen tonnes of tube with specified outside diameter of 60,3 mm and a specified wall thickness of 3,6 mm made ofsteel in accordance with EN 10296-1 grade E275 supplied with specific inspection and testing.15 tTube60,3 x 3,6 EN 10296-1 E275Option 107 Manufacturing process7.1 Steelmaking processThe steelmaking process is at the discretion of the manufacturer.Elements not included in Tables 2, 3 or 4 for the relevant grade shall not be intentionally added to the steel withoutthe agreement of the purchaser, except for elements which may be added for finishing the cast. All appropriateSIST EN 10296-1:2003
EN 10296-1:2003 (E)8measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in thesteelmaking process.7.2 Deoxidation processThe steels shall be fully killed and additionally those grades in Tables 3 and 4 shall contain nitrogen-bindingelements and are fine grain steels.7.3 Tube manufacture and delivery conditions7.3.1Tubes shall be produced by an EW, EW hot reduced (EWHR), laser beam welded (LBW) or submergedarc welded (SAW) process.
The process is at the discretion of the manufacturer unless option 1 is specified.Option 1:The process of tube manufacture is specified by the purchaser from those mentioned in the aboveparagraph.A Table of typical dimension ranges for the different manufacturing processes is given for information in annex A.EW tubes shall not include welds used for joining lengths of the strip prior to forming the tube.Laser beam welded and submerged arc welded tubes may be longitudinally or helically welded.
Strip used for themanufacture of helically, laser beam welded (LBWH) or submerged arc-welded (SAWH) tubes shall have a width ofnot less than 0,8 times or more than 3,0 times the outside diameter of the tube.
Longitudinal welded LBW or SAWtubes shall not include welds used for joining together lengths of the strip prior to forming.
LBWH or SAWH tubesmay include the weld joining together lengths of the strip prior to forming, provided this weld is subject to the sameinspection and testing as the helical weld.SAWL tubes may be cold sized by cold expanding (see Table 1).7.3.2Tubes shall be delivered in one of the delivery conditions shown in Table 1.The delivery condition of EW tube including heat treatment is at the discretion of the manufacturer unless option 2is specified.Option 2 :The delivery condition of EW tube is specified by the purchaser from those shown in Table 1.When option 3 is specified tube shall be supplied descaled . The amount of scale shall be agreed at the time ofenquiry and order.
The method is at the discretion of the manufacturer.Option 3:Tubes shall be supplied descaled.The starting material for tubes is at the discretion of the manufacturer unless option 4 is specified.Option 4:EW tubes shall be produced from pickled strip.7.3.3All NDT activities shall be carried out by qualified and competent level 1, 2 and/or 3 personnel authorisedto 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.The operating authorisation issued by the employer shall be in accordance with a written procedure.NDT operations shall be authorised 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 473 and EN 10256.SIST EN 10296-1:2003
EN 10296-1:2003 (E)9Table 1 — Tube manufacturing process and delivery conditionMethod of manufactureStarting materialFormingoperationDeliveryconditionSymbol fordeliveryconditionElectric welded (EW)Hot rolled striporNormalized/Normalized rolledstriporCold rolled strip(may be pickled)Cold formed aAs welded b cAs welded b dAnnealedFull tubeNormalizedNormalizedwelded zone+U+CR+A+N+NWThermomechanicallyrolled strip eCold formed aAs welded bNoneEW Hot reduced (EWHR)Hot rolled stripCold formed +hot reducedorHot formed +hot reduced Hot reduced+ULaser beam welded- longitudinal (LBWL) or- Helical (LBWH) seamHot rolled strip/plate
ornormalized rolledstrip/plateCold formedorhot formedAs welded c f+UThermomechanicallyrolled strip/plate eCold formed aAs weldedNoneSubmerged arc-welded- longitudinal (SAWL)or- helical (SAWH) seamHot rolled strip/plateor normalized rolledstrip/plateCold formedorHot formedAs welded c f+UThermomechanicallyrolled strip/plate eCold formed aAs weldedNoneaIncludes cold sized/cold finished at manufacturers discretion.bAn appropriate heat treatment of the weld zone is permitted.cAn as welded product from which the +N properties can be achieved after heat treatment.dAn as welded product from which the +N properties may not be achieved after heat treatment.eOnly available in conjunction with steels from Table 4.fTubes may be supplied hot sized or cold sized (with or without heat treatment) at the discretion of themanufacturer.8 Requirements8.1 GeneralThe tubes, when supplied in a delivery condition indicated in Tables 6, 7, 8 and 9 and inspected in accordance withclause 9 shall conform to the requirements of this Part of EN10296.
In addition, the general technical deliveryrequirements specified in EN 10021 apply.8.2 Chemical compositionThe cast analysis reported by the steel producer shall apply and shall conform to the requirements of Table 2, 3and 4.SIST EN 10296-1:2003
EN 10296-1:2003 (E)10In case of dispute the permissible deviations of the product analysis from the specified analysis limits are given inTable 5NOTE 1The chemical analysis method used should be agreed between manufacturer and purchaser, taking into accountCR 10261.NOTE 2When welding tubes, according to this part of EN 10296 are produced, account should be taken of the fact that thebehaviour of the steel during and after welding is dependent not only on the steel and the delivery condition but also on theconditions of preparing for and carrying out the welding.Table 2 — Chemical composition (cast analysis) non-alloy engineering steels in % by mass aSteel gradeCSiMnPSSteel nameSteel numbermax.max.max.max.max.E1551.00330,110,350,700,0450,045E190 b1.00310,100,350,700,0450,045E1951.00340,150,350,700,0450,045E220 b1.02150,140,350,700,0450,045E2351.03080,170,351,200,0450,045E260 b1.02200,160,351,200,0450,045E2751.02250,210,351,400,0450,045E320 b1.02370,200,351,400,0450,045E355 c1.05800,220,551,600,0450,045E370 b c1.02610,210,551,600,0450,045aSee also 7.1.bFor T > 6mm the C maximum value may be increased by 0,01%.CAdditions of Nb, V and Ti are permitted at the discretion of the manufacturer, the content ofthese elements shall be reported.Table 3 — Chemical composition (cast analysis) engineering steels with specified impact properties ,in %by mass aSteel gradeCSiMnPSAlTotalbNCrCu cMoNbNiTiVSteelnameSteelnumbermax.max.min.max.max.maxmin.max.max.max.max.max.max.max.max.E275K21.04560,200,400,501,400,0350,0300,0200,0150,300,350,100,0500,300,030,05E355K21.09200,200,500,901,650,0350,0300,0200,0150,300,350,100,0500,500,030,12E460K21.88910,200,601,001,700,0350,0300,0200,0250,300,700,100,0500,800,030,20aSee also 7.1.bIf sufficient other N-binding elements are present, the minimum total Al content does not apply.cIf the copper content is greater than 0,30% then the nickel content shall be at least half of the copper content.SIST EN 10296-1:2003
EN 10296-1:2003 (E)11Table 4 — Chemical composition (cast analysis) engineering steels with specified impact propertiesthermomechanically rolled strip/plate, in % by mass aSteel gradeCSiMnPSMo bNiAlTotal cNNbTIVSteel nameSteelnumbermax.max.max.max.max.max.max.min.max.max.max.max.E275M1.88950,130,501,500,0350,0300,200,300,0200,0200,0500,0500,08E355M1.88960,140,501,500,0350,0300,200,300,0200,0200,0500,0500,10E420M1.88970,160,501,700,0350,0300,200,300,0200,0200,0500,0500,12E460M1.88980,160,601,700,0350,0300,200,300,0200,0250,0500,0500,12aSee also 7.1.bThe total sum of Cr, Cu and Mo shall not be higher than 0,60%.cIf sufficient N-binding elements are present, the minimum total Al content does not apply.Table 5 — Permissible deviations of the product analysis from the specified limits on cast analysisElement Limiting values for thecast analysis accordingto Tables 2 3 and 4Permissible deviation of theproduct analysis% by mass% by massC£ 0,22+ 0,02Si£ 0,60+ 0,05Mn£ 1,70+ 0,10
- 0,05P£ 0,045+ 0,005S£ 0,045+ 0,005Cr£ 0,30+ 0,05Mo£ 0,20+ 0,03Ni£ 0,80+ 0,05Al total³ 0,020- 0,005£ 0,35+ 0,05Cu> 0,35 £ 0,70+ 0,07N£ 0,025+ 0,002Nb£ 0,050+ 0,010Ti£ 0,050+ 0,01V£ 0,20+ 0,028.3Mechanical propertiesFor tubes, with T £ 40 mm, made of steels covered by Tables 2, 3, and 4 the mechanical properties for the relevantdelivery condition in Tables 6, 7 ,8 and 9 and where applicable, clause 11 apply. For T > 40 mm (see 8.7.1) themechanical properties shall be agreed at the time of enquiry and order.SIST EN 10296-1:2003
EN 10296-1:2003 (E)12Table 6 — Mechanical properties for tubes made of some of the steel grades specified in Table 2, indelivery conditions +U or +A or +NSteel gradeMinimum tensile properties for delivery condition+U a b+A+NSteelnameSteelnumberYieldstrengthTensilestrengthA cTensilestrengthA cYieldstrengthTensilestrengthA c(ReH)(Rm)(Rm)(ReH)(Rm)MPaMPa%MPa%MPaMPa%E1551.0033175290152602815527028E1951.003425033083002819530028E2351.030830039073152523534025E2751.022534044063902127541021E3551.058040054054902235549022aFor outside diameters ³ 168,3 the values for the normalized condition apply.bIncludes delive
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