SIST EN 10208-1:2009
(Main)Steel pipes for pipelines for combustible fluids - Technical delivery conditions - Part 1: Pipes of requirement class A
Steel pipes for pipelines for combustible fluids - Technical delivery conditions - Part 1: Pipes of requirement class A
This European Standard specifies the technical delivery conditions for seamless and welded steel pipes for the on land transport of combustible fluids primarily in gas supply systems but excluding pipeline applications in the petroleum and natural gas industries. It includes less stringent quality and testing requirements than those in EN 10208-2. NOTE 1 Steel pipes for pipeline transportation systems within the petroleum and natural gas industries are covered by ISO 3183 [1]. This standard specifies products with the same (and additional) strength levels and partly similar (but not identical) requirements as EN 10208-1 and EN 10208-2 and is with two additional annexes specifying deviating or additional requirements also published as API Spec 5L [4]. NOTE 2 This European Standard does not apply to cast steel pipe.
Stahlrohre für Rohrleitungen für brennbare Medien - Technische Lieferbedingungen - Teil 1: Rohre der Anforderungsklasse A
Diese Europäische Norm legt die technischen Lieferbedingungen für nahtlose und geschweißte Stahlrohre für
den Transport brennbarer Medien an Land, vorzugsweise für Gasversorgungssysteme, fest, schließt aber
Anwendungen in der Erdöl- und Erdgasindustrie aus. Sie enthält Qualitäts- und Prüfanforderungen, die
niedriger sind als in EN 10208-2 festgelegt.
ANMERKUNG 1 Rohre für Rohrleitungstransportsysteme zur Anwendung in der Erdöl- und Erdgasindustrie sind in
ISO 3183 [1] festgelegt. Diese Norm spezifiziert Erzeugnisse mit demselben (und einem erhöhten) Anforderungsniveau
und teilweise ähnlichen (aber nicht identischen) Anforderungen wie EN 10208-1 und EN 10208-2. Sie wurde mit zwei
zusätzlichen Anhängen, in denen abweichende oder Zusatzanforderungen festgelegt sind, auch als API Spec 5L [4]
veröffentlicht.
ANMERKUNG 2 Diese Europäische Norm gilt nicht für Stahlgussrohre.
Tubes en acier pour conduites de fluides combustibles - Conditions techniques de livraison - Partie 1 : Tubes de la classe de préscription A
La présente norme européenne donne les conditions techniques de livraison de tubes en acier soudés et
sans soudure pour le transport terrestre de fluides combustibles principalement dans les systèmes
d'adduction de gaz mais elle exclut les applications mettant en oeuvre des canalisations dans les industries
d'exploration et de production de pétrole et de gaz naturel. Elle inclut des prescriptions de qualité et d'essai
moins strictes que celles de l'EN 10208-2.
NOTE 1 Les tubes en acier pour les systèmes de transport par canalisation dans les industries d'exploration et de
production de pétrole et de gaz naturel sont couverts par l'ISO 3183 [1]. La présente norme spécifie des produits avec des
niveaux de résistance les mêmes (et supplémentaires) que ceux des EN 10208-1 et EN 10208-2 et des prescriptions
partiellement similaires (mais pas identiques) à celles de ces normes. Elle comporte deux annexes supplémentaires
spécifiant des prescriptions déviantes ou additionnelles également publiées comme API Spec 5L [4].
NOTE 2 La présente Norme européenne n'est pas applicable aux tubes en acier moulé.
Jeklene cevi za cevovode za prenos plinastih in tekočih goriv - Tehnični dobavni pogoji - 1. del: Cevi razreda zahtevnosti A
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Stahlrohre für Rohrleitungen für brennbare Medien - Technische Lieferbedingungen - Teil 1: Rohre der Anforderungsklasse ATubes en acier pour conduites de fluides combustibles - Conditions techniques de livraison - Partie 1 : Tubes de la classe de préscription ASteel pipes for pipelines for combustible fluids - Technical delivery conditions - Part 1: Pipes of requirement class A77.140.75Jeklene cevi in cevni profili za posebne nameneSteel pipes and tubes for specific use75.200Petroleum products and natural gas handling equipmentICS:Ta slovenski standard je istoveten z:EN 10208-1:2009SIST EN 10208-1:2009en,de01-junij-2009SIST EN 10208-1:2009SLOVENSKI
STANDARDSIST EN 10208-1:19981DGRPHãþD
SIST EN 10208-1:2009
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10208-1March 2009ICS 23.040.10Supersedes EN 10208-1:1997
English VersionSteel pipes for pipelines for combustible fluids - Technicaldelivery condi-tions - Part 1: Pipes of requirement class ATubes en acier pour conduites de fluides combustibles -Conditions techniques de livraison - Partie 1 : Tubes de laclasse de préscription AStahlrohre für Rohrleitungen für brennbare Medien -Technische Lieferbedingungen - Teil 1: Rohre derAnforderungsklasse AThis European Standard was approved by CEN on 26 January 2009.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 CEN 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 CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10208-1:2009: ESIST EN 10208-1:2009
EN 10208-1:2009 (E) 2 Contents Page Foreword .4Introduction .41Scope .62Normative references .63Terms and definitions .84Symbols and abbreviations .95Classification and designation .95.1Classification .95.2Designation .96Information to be supplied by the purchaser .96.1Mandatory information .96.2Options . 106.3Example of ordering . 117Manufacturing . 117.1General . 117.2Steelmaking . 117.3Pipe manufacture . 117.4Heat treatment condition . 127.5Sizing . 137.6Strip end welds . 137.7Jointers . 137.8General requirements for non-destructive testing . 138Requirements . 138.1General . 138.2Chemical composition . 148.3Mechanical properties . 148.4Weldability . 158.5Appearance and soundness . 158.6Dimensions, masses and tolerances . 169Inspection . 229.1Types of inspection and inspection documents . 229.2Summary of inspection and testing . 239.3Selection and preparation of samples and test pieces . 239.4Test methods . 309.5Retests, sorting and reprocessing . 33SIST EN 10208-1:2009
EN 10208-1:2009 (E) 3 10Marking of the pipes . 3410.1General marking . 3410.2Special marking . 3411Coating for temporary protection . 35Annex A (normative)
Specification of welded jointers . 36Annex B (normative)
Treatment of imperfections and defects disclosed by visual
examination . 37Annex C (normative)
Non-destructive testing . 38Bibliography . 43SIST EN 10208-1:2009
EN 10208-1:2009 (E) 4
Foreword This document (EN 10208-1:2009) has been prepared by Technical Committee ECISS/TC 29 “Steel tubes and fittings for steels 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 or by endorsement, at the latest by September 2009, and conflicting national standards shall be with-drawn at the latest by September 2009. 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 10208-1:1997 This European Standard consists of the following parts, under the general title Steel pipes for pipelines for combustible fluids — Technical delivery conditions: Part 1: Pipes of requirement class A Part 2: Pipes of requirement class B 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, Cyprus, Czech Repub-lic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 10208-1:2009
EN 10208-1:2009 (E) 5 Introduction
It was the intention, when preparing this document, to avoid specifying the quality of line pipe to be used for a particular application. However, it was recognized that there are several quality levels commonly used, and it was decided to reflect these in the standard by the differentiation between two quality levels. Firstly, the need was recognized to provide a basic quality level. This is designated requirement class A and considered in EN 10208-1. Secondly, many purchasers impose requirements additional to the basic standard, for instance concerning toughness and non-destructive inspection. This approach is common, for example, for transmission pipelines. Such enhanced requirements are addressed in requirement class B and considered in EN 10208-2. For offshore applications and other applications outside the scope of EN 10208-1 and EN 10208-2, other standards may be applicable, e.g. ISO 3183 [1]. In this Part 1 of EN 10208, no Charpy impact energy requirements are specified. The corresponding require-ments in EN 10208-2 have been derived from established data in accordance with EPRG recommendations [2], and are intended to prevent the occurrence of long running shear fracture in pipelines transporting lean, dry natural gas. It is the responsibility of the designer to decide whether these energy requirements suffice for the intended application. For example, rich gas or two-phase fluids may require additional testing to be carried out. The selection of the requirement class depends on many factors: the properties of the fluid to be conveyed, the service conditions, design code and any statutory requirements should all be taken into consideration. Therefore this document gives no detailed guidelines. It is the ultimate responsibility of the user to select the appropriate requirement class for the intended application. NOTE This document combines a wide range of product types, dimensions and technical restrictions in accordance with the functional requirements for gas supply systems referred to in EN 1594 [3]. SIST EN 10208-1:2009
EN 10208-1:2009 (E) 6 1 Scope This European Standard specifies the technical delivery conditions for seamless and welded steel pipes for the on land transport of combustible fluids primarily in gas supply systems but excluding pipeline applications in the petroleum and natural gas industries. It includes less stringent quality and testing requirements than those in EN 10208-2. NOTE 1 Steel pipes for pipeline transportation systems within the petroleum and natural gas industries are covered by ISO 3183 [1]. This standard specifies products with the same (and additional) strength levels and partly similar (but not identical) requirements as EN 10208-1 and EN 10208-2 and is with two additional annexes specifying deviating or addi-tional requirements also published as API Spec 5L [4]. NOTE 2 This European Standard does not apply to cast steel pipe. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer-ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 287-1, Qualification test of welders — Fusion welding — Part 1: Steels EN 473, Non-destructive testing — Qualification and certification of NDT personnel — General principles EN 910, Destructive tests on welds in metallic materials — Bend tests EN 1011-1, Welding — Recommendations for welding of metallic materials — Part 1: General guidance for arc welding EN 1011-2, Welding — Recommendations for welding of metallic materials — Part 2: Arc welding of ferritic steels EN 10002-1, Metallic materials — Tensile testing — Part 1: Method of test at ambient temperature EN 10020:2000, Definition and classification of grades of steel EN 10021, 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 10079:2007, Definition of steel products EN 10168, 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 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 SIST EN 10208-1:2009
EN 10208-1:2009 (E) 7 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/flux leakage testing of seamless and welded (except submerged arc welded) ferromagnetic steel tubes for the detection of longitudinal imperfections EN 10246-7, Non-destructive testing of steel tubes — Part 7: Automatic full peripheral ultrasonic testing of seamless and welded (except submerged arc welded) tubes for the detection of longitudinal imperfections EN 10246-8, Non-destructive testing of steel tubes — Part 8: Automatic ultrasonic testing of the weld seam of electric 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 of submerged 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 weld seam of automatic fusion arc welded steel tubes for the detection of imperfections EN 10246-17, Non-destructive testing of steel tubes — Part 17: Ultrasonic testing of tube ends of seamless and welded steel tubes for the detection of laminar imperfections EN 10256, Non-destructive testing of steel tubes – Qualification and competence of level 1 and 2 non-destructive testing personnel 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 377:1997) EN ISO 2566-1, Steel — Conversion of elongation values — Part 1: Carbon and low alloy steels
(ISO 2566-1:1984) EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1:2005) EN ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) (ISO 6508-1:2005) EN ISO 8492, Metallic materials — Tube — Flattening test (ISO 8492:1998) EN ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of the chemical composition (ISO 14284:1996) EN ISO 15607, Specification and qualification of welding procedures for metallic materials — General rules (ISO 15607:2003) EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials — Welding procedure specification — Part 1: Arc welding (ISO 15609-1:2004) ISO 19232-1, Non-destructive testing — Image quality of radiographs — Part 1: Image quality indicators (wire type) — Determination of image quality value CEN/TR 10261, Iron and steel — Review of available methods of chemical analysis SIST EN 10208-1:2009
EN 10208-1:2009 (E) 8 3 Terms and definitions For the purposes of this document the following terms and definitions apply in addition to or deviating from those given in EN 10020:2000, EN 10052:1993, EN 10079:2007 and EN 10266:2003. 3.1
normalizing forming
[deviating from EN 10052:1993] forming process in which the final deformation is carried out in a certain temperature range leading to a mate-rial condition equivalent to that obtained after normalizing so that the specified values of the mechanical pro-perties are retained even after normalizing
NOTE The abbreviated form of this delivery condition is N. 3.2 thermomechanical forming [as in EN 10052:1992, but supplemented]
forming process in which the final deformation is carried out in a certain temperature range leading to a mate-rial condition with certain properties which cannot be achieved or repeated by heat treatment alone NOTE 1 Subsequent heating above 580 °C may lower the strength values. NOTE 2 The abbreviated form of this delivery condition is M (in this document for special marking). NOTE 3 Thermomechanical forming leading to the delivery condition M may include processes of increased cooling rates without or with tempering including self-tempering but excluding definitively direct quenching and quenching and tempering. NOTE 4 As a consequence of lower carbon content and carbon equivalent values, material in the delivery condition M has improved weldability properties. 3.3 quenching and tempering heat treatment comprising of quench hardening followed by tempering, where quench hardening implies aus-tenitization followed by cooling, under conditions such that austenite transforms more or less completely into martensite and possibly into bainite NOTE 1 By tempering to specific temperature (< Ac1) one or more times or holding at these temperatures, followed by cooling at an appropriate rate, the properties are brought to the required level. NOTE 2 The abbreviated form of this delivery condition is Q (in this document for special marking).
3.4 cold forming (in this context) the process by which a flat product is formed into a pipe without heating of the plate or strip 3.5
cold finishing
cold working operation (normally cold drawing) with a permanent strain greater than the maximum strain of 1,5 % which differentiates it from sizing operations specified in 7.5 3.6 pipe body for seamless pipe, the entire pipe; for welded pipes, the entire pipe excluding weld(s) and heat affected zone (HAZ)
3.7 imperfection irregularity in the wall or on the pipe surfaces detectable by methods described in this document SIST EN 10208-1:2009
EN 10208-1:2009 (E) 9 NOTE Imperfections with a size and/or population density complying with the acceptance criteria specified in this document are considered to have no practical implication on the intended use of the product. 3.8 defect imperfection of a size and/or population density not complying with the acceptance criteria specified in this document NOTE Defects are considered to adversely affect or limit the intended use of the product.
3.9 jointer two lengths of pipe coupled or welded together by the manufacturer 3.10 by agreement/agreed [as in EN 10266] agreement between manufacturer and purchaser at the time of enquiry and order 4 Symbols and abbreviations For symbols and abbreviations, see EN 10266:2003. NOTE 1 EN 10266 includes definitions of types of pipe and their abbreviations. NOTE 2 Symbols from EN 10266:2003 most frequently used in this document are: D
specified outside diameter; Dmin
(specified) minimum outside diameter; T
specified wall thickness; Tmin
(specified) minimum wall thickness.
5 Classification and designation
5.1 Classification The steel grades specified in this document are non-alloy quality steels in accordance with EN 10020.
5.2 Designation The specified steel grades are designated with steel names in accordance with EN 10027-1. The correspond-ing steel numbers have been allocated in accordance with EN 10027-2. 6 Information to be supplied by the purchaser 6.1 Mandatory information The purchaser shall state in his enquiry and order the following minimum information: a) quantity ordered (e.g. total tonnage or total length of pipe); b) type of pipe (seamless (S) or welded (W)); c) product form (i.e. pipe); SIST EN 10208-1:2009
EN 10208-1:2009 (E) 10 d) pipe outside diameter and wall thickness in millimetres (see 8.6.1.2); e) random length group or, if a fixed length is required, the length in millimetres (see 8.6.3.3 and Table 8); f) number of this European Standard (EN 10208-1); g) steel name or number (see Table 2 or 4); h) type of inspection document required (see 9.1.1). 6.2 Options A number of options are specified in this document and these are listed below. If the purchaser does not indi-cate a wish to implement any of these options at the time of enquiry and order, the pipe shall be supplied in accordance with the basic specification (see 6.1). a) Mandatory agreement – options which shall be agreed when applicable: 1) diameter tolerances for seamless pipe with wall thickness T > 25 mm (see Table 6, footnote b); 2) diameter and out-of-roundness tolerances for pipe with outside diameter D > 1 430 mm (see Table 6,
columns 2 and 3); 3) party to issue the inspection document 3.2 (see 9.1.1). b) Unless otherwise agreed –left to the discretion of the manufacturer: 1) process of manufacture for welded pipe (see 7.3); 2) choice of the heat treatment condition (see 7.4); 3) choice of the welding process for jointers (see A.1); 4) radiographic inspection for the detection of longitudinal imperfections (see C.4.2 a). c) Optional agreement – options which may be agreed: 1) approval of the quality system (see 7.1); 2) manufacture of SAWL pipe with two seams (see 7.3); 3) delivery of jointers (see 7.7); 4) application of the diameter tolerance to the inside diameter (see Table 6, footnote c); 5) application of the diameter tolerance to the outside diameter (see Table 6, footnote d); 6) special bevel configuration (see 8.6.4.2); 7) threaded ends or belled ends (see 8.6.4.3); 8) offset of strip end welds (see Table 10, footnote a); 9) test piece direction (see Table 13, footnote b); 10) use of circular test pieces (see 9.3.2.2, second paragraph); SIST EN 10208-1:2009
EN 10208-1:2009 (E) 11 11) use of flattened and heat treated test coupons (see 9.3.2.2, last paragraph) 12) non-destructive leak-tightness test instead of hydrostatic test (see 9.4.6.4); 13) use of special devices for measuring the pipe diameter (see 9.4.8.1); 14) use of (cold) die stamping (see 10.1.3); 15) special marking (see 10.2); 16) coating and lining (see Clause 11); 17) degree of staggering of pipe weld seams in jointers (see A.1); 18) verification of quality requirement for laminar imperfections (see C.2.3);
19) use of fixed depth notches for equipment calibration (see C.4.1.1 d); 20) use of hole penetrameter instead of ISO wire penetrameter (see C.4.3.1 a); 21) use of fluoroscopic inspection (C.4.3.1 b). 6.3 Example of ordering Orders shall be preferably presented as given in the example. EXAMPLE 1 000 m welded pipe with an outside diameter of 219,1 mm, a wall thickness of 6,3 mm in a length ac-cording to random length group r2 (see Table 8), made of steel grade L235GA, with test report 2.2 in accordance with
EN 10204: 1 000 m W pipe – 219,1 x 6,3 x r2 – EN 10208-2 – L235GA –
test report EN 10204 – 2.2 7 Manufacturing 7.1 General The pipe manufacturer and the stockist, where products are supplied through a stockist, shall operate a qual-ity system. An approval of the quality system may be agreed. 7.2 Steelmaking The steel making process is left to the discretion of the manufacturer. 7.3 Pipe manufacture Acceptable types of pipe are listed together with acceptable manufacturing routes in Table 1. Unless other-wise agreed, the process of manufacture (type of pipe) for welded pipe is left to the discretion of the manufac-turer. For all types of pipe, the choice of the process route in accordance with Table 1 is left to the discretion of the manufacturer.
SAWH pipe shall be manufactured using strip with a width not less than 0,8 or more than 3,0 times the pipe outside diameter. SAWL pipe may be manufactured with two seams by agreement.
SIST EN 10208-1:2009
EN 10208-1:2009 (E) 12 7.4 Heat treatment condition The pipes shall be delivered in one of the forming and heat treatment conditions given in Table 1. Unless
otherwise agreed, the choice of the heat treatment condition is left to the discretion of the manufacturer. Table 1 — Type of piping and manufacturing route (starting material, pipe forming
and heat treatment conditions) Type of pipe Starting material Pipe forming a
Heat treatment condition
Seamless (S)
Hot rolling
(as rolled)
Ingot or billet Normalizing or
normalizing formed Quenched and tempered
Hot rolling and cold finishing Normalized
Quenched and tempered
Electric welded (EW) Normalizing rolled strip Cold forming
b Stress relieved (weld area)b Normalized (weld area) Cold forming and cold finishing Normalized (entire pipe) Thermomechanically rolled strip Cold forming Heat treated (weld area)
Hot rolled or norma-lizing rolled strip Cold forming Normalized (entire pipe) Cold forming and hot stretch reducing under controlled tem-perature resulting in a nor-malized condition
Submerged arc-welded (SAW) – longitudinal
seam (SAWL) – helical seam
(SAWH), Combination welded (COW) – longitudinal
seam COWL) – helical seam
(COWH) Normalized or normal-izing rolled plate or strip Cold forming
Thermomechanically rolled plate or strip As rolled plate or strip Normalizing forming
Normalized or normal-izing rolled plate or strip As rolled plate or strip Cold forming
d Continuous wel-ded (BW)c Hot rolled or normali-zing rolled strip Hot forming
(as welded; normalized if necessary) a See 3.4 and 3.5. b
Steel grades L210GA, L235GA, L245GA and L290GA only. c
Steel grades L210GA and L235GA and D ≤ 114,3 mm for distribution pipelines only. d
Steel grades L210GA, L235GA and L245GA only. SIST EN 10208-1:2009
EN 10208-1:2009 (E) 13
7.5 Sizing The pipes may be sized to their final dimensions by expanding or reducing. This shall not produce excessive permanent strain. Where no further heat treatment or only a heat treatment of the weld area is carried out, the sizing ratio sr
achieved by this cold working shall not exceed 0,015. It shall be calculated according to the for-mula: sr = DDDba− (1) where Da is the outside diameter after sizing; Db is the outside diameter before sizing; D is the specified outside diameter. 7.6 Strip end welds 7.6.1 For helical seam welded pipe, the strip end weld shall be located at least 200 mm from the pipe end.
7.6.2 For welded pipe with a longitudinal seam, strip end welds are not permitted in the pipe. 7.7 Jointers The delivery of jointers is permitted by agreement provided the lengths of pipe used have fulfilled the requirements of this document and the special requirements in Annex A are complied with. 7.8 General requirements for non-destructive testing All 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 to EN 473 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
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.