Weldable structural steels for fixed offshore structures - Technical delivery conditions - Part 4: Cold formed welded hollow sections

This part of EN 10225 specifies requirements for submerged arc welded (SAW) and high frequency welded (HFW) cold formed hollow sections to be used in the fabrication of fixed offshore structures.
The thickness limit for SAWL round hollow sections is up to and including 50,8 mm, for HFW round hollow sections up to and including 25,4 mm and for HFW rectangular hollow sections up to and including 12,5 mm.
Greater thicknesses for SAWL hollow sections may be agreed provided the technical requirements of this European Standard are maintained.
NOTE 1   There is an Annex E about SAWH round hollow sections with thickness limit of 30,0 mm and an Annex F about high strength rectangular HFW hollow sections steel grades S550 to S700 for further information please refer to it.
The standard is applicable to steels for offshore structures, designed to operate in the offshore sector but not to steels supplied for the fabrication of subsea pipelines, risers, process equipment, process piping and other utilities. It is primarily applicable to the North Sea Sector, but may also be applicable in other areas provided that due consideration is given to local conditions e. g. temperature.
NOTE 2   There is an Annex G on the prequalification of steels for fixed offshore structures in arctic areas.
Minimum yield strengths up to 690 MPa are specified together with low temperature impact properties at temperatures down to -40 °C.

Schweißgeeignete Baustähle für feststehende Offshore-Konstruktionen - Technische Lieferbedingungen - Teil 4: Kaltgeformte geschweißte Hohlprofile

Dieser Teil der EN 10225 legt die Anforderungen an unterpulvergeschweißte (SAW) und hochfrequenzgeschweißte (HFW) kaltgeformte Hohlprofile fest, die zur Herstellung von feststehenden Offshore-Konstruktionen verwendet werden.
Die Dickenbeschränkungen betragen für SAWL Hohlprofile mit rundem Querschnitt 50,8 mm und für HFW Hohlprofile mit rundem Querschnitt 25,4 mm und für HFW Hohlprofile mit rechteckigem Querschnitt 12,5 mm.
Größere Dicken können für SAWL-Hohlprofile vereinbart werden, vorausgesetzt die technischen  Lieferbedingungen dieser Europäischen Norm werden eingehalten.
ANMERKUNG 1    Diese Norm enthält einen Anhang E bezüglich spiralnahtgeschweißter (SAWH) Hohlprofile mit einer Dickenbegrenzung von 30,0 mm und einen Anhang F bezüglich hochfester HFW Hohlprofile mit rechteckigem Querschnitt. Für weitere Informationen siehe diese Anhänge.
Diese Norm gilt für Stähle für Offshore-Konstruktionen, die für den Offshore-Einsatz vorgesehen sind, jedoch nicht für Stähle zur Herstellung von Unterwasserpipelines, Steigleitungen (risers), Verfahrens-Ausrüstungen, Rohrsystemen und anderen Einrichtungen und Ausrüstungen. Sie gilt in erster Linie für den Bereich der Nordsee, kann jedoch auch für andere Gebiete angewendet werden, vorausgesetzt, dass die örtlichen Bedingungen, z. B. die Temperatur, genügend berücksichtigt werden.
ANMERKUNG 2    Im Anhang G ist eine Vorqualifizierung von Stählen für den Einsatz in arktischen Gebieten bei Offshore Konstruktionen angegeben.
Mindestwerte der Streckgrenze bis zu 690 MPa werden zusammen mit Werten für die Kerbschlagarbeit bis herunter zu Temperaturen von -40 °C angegeben.

Aciers de construction soudables destinés à la fabrication de structures marines fixes - Conditions techniques de livraison - Partie 4 : Profils creux soudés formés à froid

La présente partie de l’EN 10225 spécifie les exigences applicables aux profils creux formés à froid soudés à l’arc immergé (SAW) et soudés par haute fréquence (HFW) destinés à la fabrication de structures marines fixes.
La limite d’épaisseur pour les profils creux à section arrondie SAWL est inférieure ou égale à 50,8 mm ; elle est inférieure ou égale à 25,4 mm pour les profils creux à section arrondie HFW et inférieure ou égale à 12,5 mm pour les profils creux à section rectangulaire HFW.
Des épaisseurs plus importantes peuvent être convenues par accord pour les profils creux SAWL, à condition que les exigences techniques de la présente Norme européenne soient respectées.
NOTE 1   L’Annexe E couvre les profils creux arrondis SAWH pour lesquels est appliquée une limite d’épaisseur de 30,0 mm et l’Annexe F traite des nuances d’acier S550 à S700 utilisés pour les profils creux HFW à section rectangulaires à haute résistance. Pour plus d’informations, se référer à ces annexes.
La norme s’applique aux aciers pour constructions marines exploitées sur le domaine maritime européen, à l’exclusion des aciers fournis pour réaliser des oléoducs sous-marins, conduites montantes, équipement de process et autres tuyauteries de transport. Elle s’applique prioritairement au secteur de la mer du Nord mais elle peut également s’appliquer dans d’autres zones dans la mesure où les conditions locales sont dûment prises en compte, notamment la température.
NOTE 2   L’Annexe G concerne la présélection des aciers destinés à la construction de structures marines fixes dans les zones arctiques.
La norme spécifie les limites d’élasticité jusqu’à 690 MPA et les énergies de rupture en flexion par choc à basse température jusqu’à - 40 °C.

Konstrukcijska jekla za varjene konstrukcije naftnih ploščadi - Tehnični dobavni pogoji - 4. del: Hladno oblikovani varjeni votli profili

Ta del standarda EN 10225 določa zahteve za obločno pod praškom varjene (SAW) in visokofrekvenčno varjene (HFW) hladno oblikovane votle profile, ki se uporabljajo za izdelavo konstrukcij naftnih ploščadi.
Omejitev glede debeline pri okroglih votlih profilih SAWL je do vključno 50,8 mm, za okrogle votle profile HFW do vključno 25,4 mm in za pravokotne votle profile HFW do vključno 12,5 mm.
Dogovori za večje debeline za votle profile SAWL so mogoči, če se ohranijo tehnične zahteve tega evropskega standarda.
OPOMBA 1: Na voljo je dodatek E o okroglih votlih profilih SAWH z omejitvijo glede debeline 30,0 mm in dodatek F o pravokotnih votlih profilih HFW visoke trdnosti razreda S550 do S700. Za dodatne informacije glejte ta dodatek.
Standard velja za jekla za konstrukcije naftnih ploščadi, projektirane za delovanje v priobalnem območju, vendar ne za jekla, dobavljena za izdelavo podmorskih cevovodov, dvižnih cevi, procesne opreme, procesnih cevovodov in drugih sredstev. Uporablja se predvsem na območju Severnega morja, lahko pa se uporablja tudi na drugih območjih, če se ustrezno upoštevajo lokalni pogoji, npr. temperatura.
OPOMBA 2: Na voljo je dodatek G o predizbiri jekel za konstrukcije naftnih ploščadi v arktičnih območjih.
Minimalne napetosti tečenja do 690 MPa so določene skupaj z nizkotemperaturnimi lastnostmi pri temperaturah do –40 °C.

General Information

Status
Published
Public Enquiry End Date
21-Feb-2018
Publication Date
29-May-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
24-May-2019
Due Date
29-Jul-2019
Completion Date
30-May-2019

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SLOVENSKI STANDARD
SIST EN 10225-4:2019
01-julij-2019
Nadomešča:
SIST EN 10225:2009
Konstrukcijska jekla za varjene konstrukcije naftnih ploščadi - Tehnični dobavni
pogoji - 4. del: Hladno oblikovani varjeni votli profili

Weldable structural steels for fixed offshore structures - Technical delivery conditions -

Part 4: Cold formed welded hollow sections
Schweißgeeignete Baustähle für feststehende Offshore-Konstruktionen - Technische
Lieferbedingungen - Teil 4: Kaltgeformte geschweißte Hohlprofile

Aciers de construction soudables destinés à la fabrication de structures marines fixes -

Conditions techniques de livraison - Partie 4 : Profils creux soudés formés à froid

Ta slovenski standard je istoveten z: EN 10225-4:2019
ICS:
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
77.140.10 Jekla za toplotno obdelavo Heat-treatable steels
77.140.70 Jekleni profili Steel profiles
SIST EN 10225-4:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 10225-4:2019
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SIST EN 10225-4:2019
EN 10225-4
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2019
EUROPÄISCHE NORM
ICS 77.140.10; 77.140.75 Supersedes EN 10225:2009
English Version
Weldable structural steels for fixed offshore structures -
Technical delivery conditions - Part 4: Cold formed welded
hollow sections

Aciers de construction soudables destinés à la Schweißgeeignete Baustähle für feststehende Offshore-

fabrication de structures marines fixes - Conditions Konstruktionen - Technische Lieferbedingungen - Teil

techniques de livraison - Partie 4 : Profils creux soudés 4: Kaltgeformte geschweißte Hohlprofile

formés à froid
This European Standard was approved by CEN on 23 December 2018.

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. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC 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

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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10225-4:2019 E

worldwide for CEN national Members.
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SIST EN 10225-4:2019
EN 10225-4:2019 (E)
Contents Page

European foreword ...................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 8

4 Classification and designation ................................................................................................................. 10

4.1 Classification ................................................................................................................................................... 10

4.2 Designation ..................................................................................................................................................... 10

5 Information to be supplied by the purchaser ..................................................................................... 11

5.1 Mandatory information .............................................................................................................................. 11

5.2 Options .............................................................................................................................................................. 11

5.3 Examples of an order ................................................................................................................................... 11

6 Manufacturing process ............................................................................................................................... 12

6.1 Steel manufacturing process .................................................................................................................... 12

6.2 Condition of feedstock material .............................................................................................................. 12

6.3 Structural hollow section manufacturing process ............................................................................ 12

6.4 Qualification of personnel for NDT-activities ..................................................................................... 12

6.5 Delivery condition ........................................................................................................................................ 13

7 Requirements ................................................................................................................................................. 13

7.1 General .............................................................................................................................................................. 13

7.2 Chemical composition ................................................................................................................................. 13

7.2.1 Heat analysis ................................................................................................................................................... 13

7.2.2 Product analysis ............................................................................................................................................ 13

7.2.3 Carbon equivalent values (CEV) and P ............................................................................................ 13

7.3 Mechanical properties ................................................................................................................................ 14

7.3.1 General .............................................................................................................................................................. 14

7.3.2 Post weld heat treatment (PWHT) ......................................................................................................... 14

7.3.3 Through thickness testing ......................................................................................................................... 14

7.3.4 Flattening or bend test ................................................................................................................................ 14

7.3.5 Prequalification for arctic areas .............................................................................................................. 14

7.4 Weldability data ............................................................................................................................................ 14

7.5 Internal soundness and non-destructive testing .............................................................................. 15

7.5.1 Non-destructive testing of the weld seam of hollow sections ....................................................... 15

7.5.2 Laminar discontinuities of hollow sections ........................................................................................ 15

7.6 Surface quality ............................................................................................................................................... 15

7.7 Dimensions, tolerances, mass .................................................................................................................. 16

7.7.1 Dimensions and tolerances on dimensions and shape ................................................................... 16

7.7.2 Mass of steel .................................................................................................................................................... 16

8 Inspection ........................................................................................................................................................ 16

8.1 General .............................................................................................................................................................. 16

8.2 Types of inspection documents ............................................................................................................... 16

8.3 Summary of inspections ............................................................................................................................. 18

8.4 Intermediary supply .................................................................................................................................... 23

9 Frequency of testing and preparation of samples and test pieces .............................................. 23

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SIST EN 10225-4:2019
EN 10225-4:2019 (E)

9.1 Frequency of test ........................................................................................................................................... 23

9.1.1 Chemical analysis ......................................................................................................................................... 23

9.1.2 Tensile test and impact test ...................................................................................................................... 23

9.1.3 Testing of the weld seam ............................................................................................................................ 24

9.1.4 Testing of the corner regions for square or rectangular HFW hollow sections ..................... 24

9.2 Selection and preparation of samples for product analysis.......................................................... 24

9.3 Location of samples and orientation of tensile test pieces ............................................................ 24

9.4 Location of samples and orientation of impact test pieces ........................................................... 24

9.5 Preparation of test pieces for mechanical tests................................................................................. 25

9.5.1 General ............................................................................................................................................................. 25

9.5.2 Preparation of tensile test pieces ........................................................................................................... 25

9.5.3 Preparation of impact test pieces ........................................................................................................... 25

9.5.4 Test pieces for flattening and bend tests ............................................................................................. 26

10 Test methods .................................................................................................................................................. 26

10.1 Chemical analysis ......................................................................................................................................... 26

10.2 Mechanical tests ............................................................................................................................................ 26

10.2.1 Test temperatures ........................................................................................................................................ 26

10.2.2 Tensile test ...................................................................................................................................................... 26

10.2.3 Impact test ....................................................................................................................................................... 26

10.2.4 Flattening test ................................................................................................................................................ 27

10.2.5 Weld bend test ............................................................................................................................................... 27

10.3 Visual inspection and dimensional check ............................................................................................ 27

10.4 Non-destructive tests .................................................................................................................................. 27

10.4.1 General ............................................................................................................................................................. 27

10.4.2 NDT for the weld seam of HFW hollow sections ................................................................................ 28

10.4.3 NDT for the weld seam of submerged arc welded hollow sections ............................................ 28

10.4.4 Ultrasonic testing for laminar imperfections ..................................................................................... 28

10.4.5 NDT for surface quality ............................................................................................................................... 28

10.5 Retests, sorting and reprocessing .......................................................................................................... 28

11 Marking and bundling ................................................................................................................................. 28

11.1 Die stamping and paint marking ............................................................................................................. 28

11.2 Bundling ........................................................................................................................................................... 29

12 Options ............................................................................................................................................................. 29

Annex A (normative when Option 1 is specified by the purchaser) Further details of steel

manufacturing procedures to be supplied by the manufacturer ................................................ 40

Annex B (normative when Option 17 is specified by the purchaser) Weldability testing and

mechanical testing of butt welds............................................................................................................. 41

B.1 General requirements ................................................................................................................................. 41

B.2 Welding processes and procedure ......................................................................................................... 41

B.3 Butt-weld requirements ............................................................................................................................. 42

B.3.1 General ............................................................................................................................................................. 42

B.3.2 Test piece dimensions................................................................................................................................. 42

B.3.3 Bevel detail ..................................................................................................................................................... 43

B.3.4 Welding processes ........................................................................................................................................ 44

B.3.5 Nominal heat input....................................................................................................................................... 44

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SIST EN 10225-4:2019
EN 10225-4:2019 (E)
B.3.6 Heat treatment of S355NLHCO, S355MLHCO, S420MLHCO, S460MLHCO, S500MLHCO,

S550MLHCO, S600 MLHCO, S650 MLHCO and S700MLHCO grades ............................................ 44

B.3.7 Dehydrogenation of test pieces ............................................................................................................... 45

B.4 Mechanical testing ........................................................................................................................................ 45

B.4.1 General .............................................................................................................................................................. 45

B.4.2 Charpy-V-notch impact tests ..................................................................................................................... 46

B.4.3 Fracture mechanic test ............................................................................................................................... 47

B.4.4 Macrohardness .............................................................................................................................................. 48

B.4.5 Cross-weld tensile test ................................................................................................................................ 49

Annex C (normative when Option 17 is specified by the purchaser) Weldability testing -

Bead-on-strip .................................................................................................................................................. 54

C.1 General .............................................................................................................................................................. 54

C.2 Test material dimension ............................................................................................................................ 54

C.3 Welding method ............................................................................................................................................ 54

C.4 Test condition ................................................................................................................................................ 54

C.5 Specific test requirements: Macrosection and hardness tests ..................................................... 55

Annex D (normative when Option 17 is specified by the purchaser) Weldability testing -

Controlled thermal severity tests (CTS) ............................................................................................... 57

D.1 General .............................................................................................................................................................. 57

D.2 Test block dimensions ................................................................................................................................ 57

D.3 General welding details .............................................................................................................................. 57

D.3.1 Anchor welds .................................................................................................................................................. 57

D.3.2 Test welds ........................................................................................................................................................ 57

D.4 Evaluation of the test welds ...................................................................................................................... 58

D.5 Hardness testing ............................................................................................................................................ 58

Annex E (informative) Helical submerged arc welded (SAWH) hollow sections ................................ 64

E.1 General .............................................................................................................................................................. 64

E.2 Additional weld geometry tolerances ................................................................................................... 64

Annex F (informative) High strength square and rectangular cold formed HFW hollow

sections ............................................................................................................................................................. 65

Annex G (informative) Prequalification of steels for offshore structures operating in arctic

areas .................................................................................................................................................................. 68

Bibliography.................................................................................................................................................................. 69

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SIST EN 10225-4:2019
EN 10225-4:2019 (E)
European foreword

This document (EN 10225-4:2019) has been prepared by Technical Committee CEN/TC 459 “ECISS -

European Committee for Iron and Steel Standardization” , the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by November 2019, and conflicting national standards

shall be withdrawn at the latest by November 2019.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document, together with EN 10225-1:2019, EN 10225-2:2019, and EN 10225-3:2019, supersedes

EN 10225:2009.

This European Standard consists of the following parts, under the general title 'Weldable structural

steels for fixed offshore structures – Technical delivery conditions':
— Part 1: Plates
— Part 2: Sections
— Part 3: Hot finished hollow sections
— Part 4: Cold formed welded hollow sections
In comparison to the previous edition following technical changes were made:

— welded cold formed hollow sections were only implicitly mentioned in the previous version.

Because of the split of the standard into four parts now a separate part with full requirements to

cold formed hollow sections for offshore structures is written;
— the steel names were adapted to EN 10027-1;

— former grades of group 3 are no longer listed, new options with the same enhanced properties have

been introduced (Options 2 and 3);

— there is an Annex E concerning SAWH hollow sections and an Annex F concerning high strength

square and rectangular HFW hollow sections, since the application of these hollow sections needs

more practical experience;

— an informative Annex G was added for the prequalification of steels for fixed offshore structures in

arctic areas.

According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.

Through its subcommittee SC 3 “Structural steels other than reinforcements” (secretariat: DIN)

---------------------- Page: 7 ----------------------
SIST EN 10225-4:2019
EN 10225-4:2019 (E)
1 Scope

This document specifies requirements for submerged arc welded (SAW) and high frequency welded

(HFW) cold formed hollow sections to be used in the fabrication of fixed offshore structures.

The thickness limit for SAWL circular hollow sections is up to and including 50,8 mm, for HFW circular

hollow sections up to and including 25,4 mm and for HFW square and rectangular hollow sections up to

and including 12,5 mm.

Greater thicknesses for SAWL hollow sections can be agreed provided the technical requirements of

this European Standard are maintained.

NOTE 1 This document has an Annex E for SAWH round hollow sections with a thickness limit of 30,0 mm, and

an Annex F for high strength square and rectangular HFW hollow sections made of steel grades S500 to S700.

This European Standard is applicable to steels for offshore structures designed to operate in the

offshore sector but not to steels supplied for the fabrication of subsea pipelines, risers, process

equipment, process piping and other utilities. It is primarily applicable to the North Sea Sector, but may

also be applicable in other areas provided that due consideration is given to local conditions e.g. design

temperature.

NOTE 2 This document has an informative Annex G on the prequalification of steels for fixed offshore

structures in arctic areas.

Minimum yield strengths up to 700 MPa are specified together with impact properties at temperatures

down to –40 °C.

NOTE 3 A range of material grades is specified in this standard and the user can select the grade most

appropriate to the intended use and its service condition.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 1011-1, Welding — Recommendations for welding of metallic materials — Part 1: General guidance

for arc welding
EN 10020, 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 10079, Definition of steel products

EN 10160, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection

method)

EN 10164, Steel products with improved deformation properties perpendicular to the surface of the

product - Technical delivery conditions

EN 10168, Steel products — Inspection documents — List of information and description

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SIST EN 10225-4:2019
EN 10225-4:2019 (E)
EN 10204, Metallic products — Types of inspection documents

EN 10219-2, Cold formed welded structural hollow sections of non-alloy and fine grain steels — Part 2:

Tolerances, dimensions and sectional properties

CEN/TR 10261, Iron and steel — European standards for the determination of chemical composition

EN ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method (ISO 148-1)

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-

EN ISO 4063, Welding and allied processes — Nomenclature of processes and reference numbers (ISO

4063)

EN ISO 4136, Destructive tests on welds in metallic materials — Transverse tensile test (ISO 4136)

EN ISO 4885, Ferrous materials — Heat treatments — Vocabulary (ISO 4885)

EN ISO 5173:2010, Destructive tests on welds in metallic materials — Bend tests (ISO 5173:2009)

EN ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method (ISO 6507-1)

EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature (ISO

6892-1)
EN ISO 6947, Welding and allied processes — Welding positions (ISO 6947)
EN ISO 8492, Metallic materials — Tube — Flattening test (ISO 8492)

EN ISO 9606-1, Qualification testing of welders — Fusion welding — Part 1: Steels (ISO 9606-1)

EN ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel (ISO 9712)

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 10893-5, Non-destructive testing of steel tubes — Part 5: Magnetic particle inspection of seamless

and welded ferromagnetic s
...

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