SIST EN 10217-2:2019

SLOVENSKI STANDARD
01-julij-2019
Nadomešča:
SIST EN 10217-2:2003
SIST EN 10217-2:2003/A1:2005
Varjene jeklene cevi za tlačne posode - Tehnični dobavni pogoji - 2. del: Električno
varjene nelegirane in legirane jeklene cevi s specificiranimi lastnostmi za delo pri
povišanih temperaturah
Welded steel tubes for pressure purposes - Technical delivery conditions - Part 2:
Electric welded non-alloy and alloy steel tubes with specified elevated temperature
properties
Geschweißte Stahlrohre für Druckbeanspruchungen - Technische Lieferbedingungen -
Teil 2: Elektrisch geschweißte Rohre aus unlegierten und legierten Stählen mit
festgelegten Eigenschaften bei erhöhten Temperaturen
Tubes soudés en acier pour service sous pression - Conditions techniques de livraison -
Partie 2: Tubes soudes électriquement en acier non allié et allié avec caractéristiques
spécifiées à température élevée
Ta slovenski standard je istoveten z: EN 10217-2:2019
ICS:
23.020.32 Tlačne posode Pressure vessels
77.140.75 Jeklene cevi in cevni profili Steel pipes and tubes for
za posebne namene specific use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 10217-2
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2019
EUROPÄISCHE NORM
ICS 23.040.10; 77.140.75 Supersedes EN 10217-2:2002
English Version
Welded steel tubes for pressure purposes - Technical
delivery conditions - Part 2: Electric welded non-alloy and
alloy steel tubes with specified elevated temperature
properties
Tubes soudés en acier pour service sous pression - Geschweißte Stahlrohre für Druckbeanspruchungen -
Conditions techniques de livraison - Partie 2: Tubes Technische Lieferbedingungen - Teil 2: Elektrisch
soudés électriquement en acier non allié et allié avec geschweißte Rohre aus unlegierten und legierten
caractéristiques spécifiées à température élevée Stählen mit festgelegten Eigenschaften bei erhöhten
Temperaturen
This European Standard was approved by CEN on 25 February 2019.

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 10217-2:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Symbols . 7
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 . 8
6.3 Example of an order . 9
7 Manufacturing process . 9
7.1 Steelmaking process . 9
7.2 Tube manufacture and delivery conditions . 9
7.3 Non Destructive Testing Personnel Requirements . 10
8 Requirements . 10
8.1 General . 10
8.2 Chemical composition . 10
8.2.1 Cast analysis . 10
8.2.2 Product analysis . 12
8.3 Mechanical properties . 12
8.4 Appearance and internal soundness. 13
8.4.1 Weld seam . 13
8.4.2 Tube surface . 14
8.4.3 Internal soundness . 14
8.5 Straightness . 14
8.6 Preparation of ends . 14
8.7 Dimensions, masses and tolerances . 15
8.7.1 Diameter and wall thickness . 15
8.7.2 Mass . 19
8.7.3 Lengths . 19
8.7.4 Tolerances . 19
9 Inspection . 20
9.1 Type of inspection . 20
9.2 Inspection documents . 20
9.2.1 Types of inspection documents. 20
9.2.2 Content of inspection documents . 21
9.3 Summary of inspection and testing . 21
10 Sampling . 23
10.1 Frequency of tests . 23
10.1.1 Test unit . 23
10.1.2 Number of sample tubes per test unit . 23
10.2 Preparation of samples and test pieces . 24
10.2.1 Selection and preparation of samples for product analysis . 24
10.2.2 Location, orientation and preparation of samples and test pieces for mechanical tests . 24
11 Verification of test methods . 25
11.1 Chemical analysis . 25
11.2 Tensile test on the tube body . 25
11.2.1 At room temperature . 25
11.2.2 At elevated temperature . 25
11.3 Transverse tensile test on the weld . 26
11.4 Flattening test . 26
11.5 Ring tensile test . 26
11.6 Drift expanding test . 26
11.7 Ring expanding test . 27
11.8 Impact test . 27
11.9 Leak tightness test . 28
11.9.1 Hydrostatic test . 28
11.9.2 Electromagnetic test . 28
11.10 Dimensional inspection . 28
11.11 Visual examination . 29
11.12 Non-Destructive Testing . 29
11.13 Material identification . 29
11.14 Retests, sorting and reprocessing . 29
12 Marking . 30
12.1 Marking to be applied . 30
12.2 Additional marking . 30
13 Protection . 30
Annex A (informative) Technical changes from the previous edition . 31
A.1 Introduction . 31
A.2 Technical changes . 31
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of 2014/68/EU . 33
Bibliography . 34

European foreword
This document (EN 10217-2:2019) 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 October 2019, and conflicting national standards shall be withdrawn
at the latest by October 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 supersedes EN 10217-2:2002.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports the essential requirements of EU Directive 2014/68/EU.
For relationship with EU Directive 2014/68/EU (formerly 97/23/EC), see informative Annex ZA, which is an
integral part of this document.
This European Standard consists of the following parts, under the general title Welded steel tubes for
pressure purposes – Technical delivery conditions:
— Part 1: Electric welded and submerged arc welded non-alloy steel tubes with specified room temperature
properties
— Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties
— Part 3: Electric welded and submerged arc welded alloy fine grain steel tubes with specified room, elevated
and low temperature properties
— Part 4: Electric welded non-alloy steel tubes with specified low temperature properties
— Part 5: Submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature
properties
— Part 6: Submerged arc welded non-alloy steel tubes with specified low temperature properties
— Part 7: Stainless steel tubes
Another European Standard series covering tubes for pressure purposes is:
EN 10216, Seamless steel tubes for pressure purposes.
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 10 “Steel tubes, and iron and steel fittings” (secretariat: UNI)
1 Scope
This document specifies the technical delivery conditions for two test categories of electric welded tubes of
circular cross section, with specified elevated temperature properties, made from non-alloy quality steel or
alloy special steel.
NOTE 1 These tube grades are intended to support the essential requirements of EU Directive 2014/68/EU in
respect of pressure equipment with specified elevated temperature properties, covered under all relevant Categories as
set out in Article 13 of that Directive.
NOTE 2 Once this standard is published in the Official Journal of the European Union (OJEU), presumption of
conformity to the Essential Safety Requirements (ESR) of Directive 2014/68/EU is limited to the technical data for the
materials in this standard and does not presume adequacy of the material for a specific item of pressure equipment.
Consequently, the assessment of the technical data stated in this material standard against the design requirements of a
specific item of equipment to verify that the ESRs of the Pressure Equipment Directive are satisfied, needs to be done by
the designer or manufacturer of the pressure equipment, taking also into account any subsequent processing
procedures which may affect properties of the base materials.
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 10020, 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 10168:2004, Steel products — Inspection documents — List of information and description
EN 10204:2004, Metallic products — Types of inspection documents
EN 10220, Seamless and welded steel tubes — Dimensions and masses per unit length
CEN/TR 10261, Iron and steel — European standards for the determination of chemical composition
EN 10266, Steel tubes, fittings and structural hollow sections — Symbols and definitions of terms for use in
product standards
EN ISO 148-1:2016, Metallic materials — Charpy pendulum impact test — Part 1: Test method (ISO 148-
1:2016)
EN ISO 377:2017, Steel and steel products - Location and preparation of samples and test pieces for mechanical
testing (ISO 377:2017)
EN ISO 2566-1:1999, Steel — Conversion of elongation values — Part 1: Carbon and low alloy steels (ISO 2566-
1:1984)
EN ISO 4885, Ferrous materials — Heat treatments — Vocabulary (ISO 4885)
EN ISO 6892-1:2016, Metallic materials — Tensile testing — Part 1: Method of test at room temperature (ISO
6892-1:2016)
EN ISO 6892-2:2018, Metallic materials — Tensile testing — Part 2: Method of test at elevated temperature
(ISO 6892-2:2018)
EN ISO 8492:2013, Metallic materials — Tube — Flattening test (ISO 8492:2013)
EN ISO 8493:2004, Metallic materials — Tube — Drift-expanding test (ISO 8493:1998)
EN ISO 8495:2013, Metallic materials — Tube — Ring-expanding test (ISO 8495:2013)
EN ISO 8496:2013, Metallic materials — Tube — Ring tensile test (ISO 8496:2013)
EN ISO 10893-1:2011, 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 10893-1:2011)
EN ISO 10893-2:2011, 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-
2:2011)
EN ISO 10893-3:2011, 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 10893-3:2011)
EN ISO 10893-8:2011, Non-destructive testing of steel tubes — Part 8: Automated ultrasonic testing of
seamless and welded steel tubes for the detection of laminar imperfections (ISO 10893-8:2011)
EN ISO 10893-10:2011, 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 10893-10:2011)
EN ISO 10893-11:2011, Non-destructive testing of steel tubes — Part 11: Automated ultrasonic testing of the
weld seam of welded steel tubes for the detection of longitudinal and/or transverse imperfections (ISO 10893-
11:2011)
EN ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical
composition (ISO 14284)
ISO 11484:2009, 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, EN 10021, EN 10266,
EN ISO 4885 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
test category
classification that indicates the extent and level of inspection and testing
3.2
employer
organisation for which a person works on a regular basis
Note 1 to entry: The employer may be either the tube manufacturer or a third party organization providing services,
such as Non-Destructive Testing (NDT).
3.3
EW
electric welded tube
tubular product having one longitudinal seam weld produced by electric (resistance) welding where the
strip edges to be welded are mechanically pressed together and the heat for the welding process is
generated by the resistance to flow of low or high frequency electric current applied by either a conduction
or induction process
3.4
HFW
high frequency welded tube
EW tube produced specifically using a welding current frequency equal to or greater than 100 kHz
4 Symbols
For the purposes of this document, the symbols given in EN 10266 apply.
5 Classification and designation
5.1 Classification
In accordance with the classification system in EN 10020, the steel grades P195GH, P235GH and P265GH in
this standard are classified as non-alloy quality steels and the steel grade 16Mo3 is classified as an alloy
special steel.
5.2 Designation
5.2.1 For the tubes covered by this document, the steel designation consists of:
— the number of this European Standard, e.g. EN 10217-2;
plus either:
— the steel name in accordance with EN 10027-1;
or:
— the steel number allocated in accordance with EN 10027-2.
5.2.2 The steel name of non-alloy steel grades is designated by:
— the capital letter P for pressure purposes;
— the indication of the specified minimum yield strength at room temperature for thickness T less than or
equal to 16 mm, expressed in MPa (see Table 4);
— the symbols GH for elevated temperature.
5.2.3 The steel name of alloy steel grade 16Mo3 is designated by the chemical composition (see Table 2).
6 Information to be supplied by the purchaser
6.1 Mandatory information
The following information shall be supplied by the purchaser at the time of enquiry and order:
a) the quantity (mass, total length or number of tubes of set length);
b) the term ‘tube’ and tube type, HFW;
c) the dimensions (outside diameter D and wall thickness T) (see Table 6);
d) the random length range (see 8.7.3).
e) for tubes with a D/T > 100, out of roundness limits (see 8.7.4.4).
f) the designation of the steel grade in accordance with this document (see 5.2);
g) the test category for non-alloy steel (see 9.3).
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).
1) Tube manufacturing route (see 7.2.1);
2) Restriction on copper and tin content (see Table 2);
3) Product analysis (see 8.2.2);
4) Verification of tube body impact energy (see 8.3);
5) Additional longitudinal impact test at −10°C for non-alloy steel grades (see Table 4);
6) Verification of proof strength R at elevated temperature (see 8.3);
p0,2
7) Selection of method for verification of leak-tightness test (see 8.4.3.1);
8) Non-Destructive Testing of test category 2 tubes for the detection of transverse imperfections (see
8.4.3.2);
9) Non-Destructive Testing of test category 2 tubes for the detection of laminar imperfections (see 8.4.3.2);
10) Special end preparation (see 8.6);
11) Exact lengths (see 8.7.3);
12) Inspection document 3.2 in place of the standard 3.1 inspection certificate (see 9.2.1);
13) Verification of tensile strength of the weld in the transverse direction for tubes of outside diameter
D > 219,1 mm (see Table 10);
14) Agreement of a different test pressure for hydrostatic leak-tightness test (see 11.9.1);
15) Wall thickness measurement away from the ends (see 11.10);
16) Selection of the Non-Destructive Testing method for the inspection of the weld seam of test category 1
tubes (see 11.12.1);
17) Selection of the Non-Destructive Testing method for the full peripheral inspection of test category 2
tubes (see 11.12.2);
18) Additional marking (see 12.2);
19) Protection (see Clause 13).
6.3 Example of an order
500 m of HFW tube with an outside diameter of 168,3 mm, a wall thickness of 4,5 mm in accordance with
EN 10217-2, made of steel grade P265GH, test category 1, in 6 m random lengths, with a 3.2 inspection
certificate in accordance with EN 10204:
500 m – HFW Tube - 168,3 × 4,5 - EN 10217–2 — P265GH - TC 1 - 6m - Option 12: 3.2
7 Manufacturing process
7.1 Steelmaking process
The steelmaking process is at the discretion of the steel or tube manufacturer with the exception that steel
produced by 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 and contain nitrogen binding elements, details of which shall be reported.
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 by an electric welding process employing high frequency welding
(HFW), of minimum frequency 100 kHz in accordance with one of the manufacturing routes specified in
Table 1.
Unless Option 1 is specified the manufacturing route is at the discretion of the manufacturer.
Option 1: The manufacturing route from Table 1 is specified by the purchaser.
The finished tubes shall not include the welds used to join together the lengths of strip prior to forming.
7.2.2 Tube production welding shall be carried out by qualified personnel in accordance with documented
procedures. For tubes to be used in pressure equipment under European legislation, manufacturers shall
employ an established procedure for the approval of welding operatives.
The production (welding) process shall be qualified and approved under the tube manufacturer’s own QA
system. Only HFW tubes (see 3.4) shall be supplied for pressure equipment under European legislation.
7.2.3 The delivery conditions of tubes covered by this document are shown in Table 1.
Table 1 — Tube manufacturing route and delivery condition
Route N° Manufacturing routes
Acceptable
(according to delivery condition
Starting material Forming operation
a
Part 1)
1c NP
As (hot) rolled strip
1d NR
Cold formed and
welded
2b NW
Normalized rolled
2c NP
strip
2d NR
a
NP = tube full body normalized; NW = normalized weld zone; NR = normalized rolled or hot
(stretch) reduced within the normalizing temperature range.
7.3 Non Destructive Testing Personnel Requirements
7.3.1 All NDT activities shall be carried out by qualified and competent level 1, 2 and/or 3 personnel,
authorized to carry out this work by the employer.
7.3.2 The qualification for levels 1 and 2 personnel shall be in accordance with ISO 11484 or, at least, an
equivalent to it.
7.3.3 It is recommended for the level 3 personnel to be suitably certified, either in accordance with
EN ISO 9712 or, at least, an equivalent to it.
7.3.4 The operating authorization issued by the employer shall be in accordance with a written procedure.
7.3.5 All NDT operations shall be authorised by a level 3 NDT technician approved by the employer.
NOTE The definition of levels 1, 2 and 3 can be found in appropriate standards, e.g. EN ISO 9712 and ISO 11484.
8 Requirements
8.1 General
The tubes shall conform to the requirements of this document when supplied in a delivery condition in
accordance with Table 1 and inspected in accordance with the specified requirements in Table 10.
Tubes shall be suitable for hot and cold bending.
In addition, the general technical delivery requirements specified in EN 10021 shall apply.
8.2 Chemical composition
8.2.1 Cast analysis
The cast analysis reported by the steel producer shall apply and shall conform to the requirements of
Table 2.
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 analysis, but also on
the welding process, including heat input, any applied heat treatment and the conditions of preparing for
and carrying out the welding.
a
Table 2 — Chemical composition (cast analysis) in % by mass
Steel grade C Si Mn P S Cr Mo Ni Al b d d d Cr+Cu+Mo+Ni
Cu Nb Ti V
tot
Steel name Steel max. max. max. max. max. max. max. max. max. max.
number
P195GH 1.0348 c
≤ 0,13 0,35 ≤ 0,70 0,025 0,020 0,30 ≤ 0,08 0,30 0,30 0,010 0,03 0,02 0,70
≥ 0,020
P235GH 1.0345 c
≤ 0,16 0,35 ≤ 1,20 0,025 0,020 0,30 ≤ 0,08 0,30 0,30 0,010 0,03 0,02 0,70
≥ 0,020
P265GH 1.0425 c
≤ 0,20 0,40 ≤ 1,40 0,025 0,020 0,30 ≤ 0,08 0,30 0,30 0,010 0,03 0,02 0,70
≥ 0,020
0,12 0,40 0,25
16Mo3 1.5415 to 0,35 to 0,025 0,020 0,30 to 0,30 ≤ 0,040 0,30 - - - -
0,20 0,90 0,35
a
Elements not quoted in this Table shall not be intentionally added to the steel without the agreement of the purchaser, except for elements which may be added for
finishing the cast. All appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steel making process,
which would have a negative impact on the mechanical properties, ageing and the suitability of the material.
b
Option 2: In order to facilitate subsequent forming operations, an agreed maximum copper content lower than indicated and an agreed specified maximum tin content
shall apply;
c
For Al/N ratios ≥ 2, if nitrogen is fixed by niobium, titanium or vanadium, details of which shall be reported, this requirement does not apply except that when using
titanium, the steel producer shall verify that (Al+Ti/2) ≥ 0,020%;
d
The content of these elements need not to be reported unless intentionally added to the cast.
8.2.2 Product analysis
Unless Option 3 is specified, only the cast analysis shall be reported.
Option 3: A product analysis for the tubes shall be supplied.
Table 3 specifies the permissible deviations of the product analysis from the specified limits on cast analysis
given in Table 2.
Table 3 — Permissible deviations of the product analysis from specified limits on cast analysis given
in Table 2
Limiting value for the cast
Permissible deviation of the
Analysis in accordance with
product analysis
Element
Table 2
% by mass
% by mass
C ≤ 0,20 + 0,02
Si ≤ 0,40 + 0,05
≤ 1,00 + 0,05
Mn
> 1,00 to ≤ 1,40 ± 0,10
P ≤ 0,025 + 0,005
S ≤ 0,020 + 0,005
Cr ≤ 0,30 + 0,05
Mo ≤ 0,35 + 0,03
Ni ≤ 0,30 + 0,05
Al ≤ 0,040 + 0,005
Cu ≤ 0,30 + 0,05
Nb ≤ 0,010 + 0,005
Ti ≤ 0,030 + 0,010
V ≤ 0,02 + 0,01
Cr + Cu + Mo + Ni ≤ 0,70 + 0, 05
8.3 Mechanical properties
The mechanical properties of the tubes, in a specified delivery condition from Table 1, shall conform to the
requirements of Table 4 and the relevant additional tests specified in 11.3 to 11.7, irrespective of whether
the test results are actually verified or not (see Table 10 for a summary of the inspection and verification
testing required).
Unless Option 4 is specified, the impact properties need not be verified.
Option 4: The tube body impact properties shall be verified (see 10.2.2.5 and 11.8).
Table 4 — Mechanical properties for wall thickness T ≤ 16 mm
b
Steel grade Tensile properties at room temperature Impact properties
a c
Upper yield Tensile Elongation Minimum average absorbed
c
strength or strength energy
A min.
proof strength
%
a d
R or R R KV J
eH p0,2 m 2
Steel Steel
min.
name number
MPa at a temperature of °C
MPa
l t
l t 20 0 −10 20 0
e
P195GH 1.0348 195 320 – 440 27 25 - 40 28 - 27
e
P235GH 1.0345 235 360 – 500 25 23 - 40 28 - 27
e
P265GH 1.0425 265 410 – 570 23 21 - 40 28 - 27
16Mo3 1.5415 280 450 – 600 22 20 40 - - 27 -
a
See 11.2.1
b
To be verified only when Options 4 and/or 5 are specified
c
l = longitudinal t = transverse
d
KV = impact values obtained using a 2 mm radius striker in accordance with EN ISO 148-1
e
Option 5: In addition to the specified impact test at 0 °C, an additional longitudinal impact test shall be performed
at −10 °C.
The minimum proof strength R values of the tube grades at elevated temperature are given in Table 5.
p0,2
These need not be verified, unless Option 6 is specified.
Option 6: Proof strength R at elevated temperature shall be verified. The test temperature from Table 5 shall
p0,2
be agreed at the time of enquiry and order.
The manufacturer shall have data available to demonstrate that their products are capable of achieving the
minimum elevated temperature properties shown.
Table 5 — Minimum 0,2% proof strength (R ) at elevated temperature for wall thickness
p0,2
T ≤ 16 mm
R min.
p0,2
Steel grade MPa
at a temperature of °C
Steel name Steel 100 150 200 250 300 350 400
number
P195GH 1.0348 175 165 150 130 113 102 94
P235GH 1.0345 198 187 170 150 132 120 112
P265GH 1.0425 226 213 192 171 154 141 134
16Mo3 1.5415 243 237 224 205 173 159 156
8.4 Appearance and internal soundness
8.4.1 Weld seam
The weld area shall be free from cracks and lack of fusion. Repairs to the weld seam of HFW tubes are not
permitted.
NOTE For strip alignment (radial offset) and tolerances in the weld region, see 8.7.4.2.
8.4.2 Tube surface
8.4.2.1 The tubes shall be free from external and internal surface defects that can be detected by visual
examination of the surfaces that are accessible without the use of special equipment.
8.4.2.2 The internal and external surface finish of the tubes shall be typical of the manufacturing process
and, where applicable, the heat treatment employed. Normally the finish and surface condition shall be such
that any surface imperfections requiring dressing can be identified.
8.4.2.3 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.
8.4.2.4 Any surface imperfection, which is demonstrated to be deeper than 5 % of the wall thickness T or
3 mm, whichever is the smaller, shall be dressed.
8.4.2.5 Surface imperfections which extend below the specified minimum wall thickness shall be
considered defects and tubes containing these shall be deemed not to conform with this document and shall
be rejected.
8.4.3 Internal soundness
8.4.3.1 Leak-tightness
The tubes shall be assessed for leak tightness by either a hydrostatic test (see 11.9.1) or an electromagnetic
test (see 11.9.2).
Unless Option 7 is specified, the choice of the test method is at the discretion of the manufacturer.
Option 7: The test method for verification of leak-tightness in accordance with 11.9.1 or 11.9.2 is specified by
the purchaser.
8.4.3.2 Non-Destructive Testing
The full length of the weld seam of tubes of test category 1 shall be subjected to Non-Destructive Testing for
the detection of imperfections in accordance with 11.12.1.
The full length of the weld seam and the body of tubes of test category 2 shall be subjected to Non-
Destructive Testing for the detection of longitudinal imperfections, in accordance with 11.12.2.
For test category 2 tubes, if Options 8 or 9 are specified, the following additional NDT testing shall also be
applied.
Option 8: The tubes of test category 2 shall be subjected to Non-Destructive Testing for the detection of
transverse imperfections in accordance with 11.12.3.
Option 9: The tubes of test category 2 shall be subjected to Non-Destructive Testing for the detection of laminar
imperfections in accordance with 11.12.4.
8.5 Straightness
The deviation from straightness of any tube length L shall not exceed 0,001 5 L. Deviations from straightness
over any one metre length shall not exceed 3 mm.
8.6 Preparation of ends
Unless Option 10 is specified, tubes shall be delivered with square cut ends free from excessive burrs.
Option 10: The tubes shall be delivered with bevelled ends (see Figure 1). The bevel shall have an angle α of
+°5
30° with a root face C of 1,6 mm ± 0,8 mm. Bevelling is applicable for specified wall thicknesses ≥ 3,2 mm,
0°
except that for wall thickness T ≥ than 20 mm, an agreed alternative bevel may be specified.

Key
D outside diameter
α bevel angle
C root face of bevelled end
Figure 1 — Tube end bevel
8.7 Dimensions, masses and tolerances
8.7.1 Diameter and wall thickness
Tubes shall be delivered by outside diameter D and wall thickness T.
The preferred outside diameters D and wall thicknesses T have mainly been selected from EN 10220 and are
given in Table 6.
NOTE Dimensions other than those in Table 6 may be agreed.
Table 6 — Preferred dimensions
Dimensions in millimetres
Outside diameter Wall thicknesses, T
D
a
Series
1 2 3 1,4 1,6 1,8 2 2,3 2,6 2,9 3,2 3,6 4 4,5 5 5,6 6,3 7,1 8 8,8 10 11 12,5 14,2 16
10,2
12,7
13,5
17,2
21,3
25,4
26,9
31,8
33,7
Outside diameter Wall thicknesses, T
D
a
Series
1 2 3 1,4 1,6 1,8 2 2,3 2,6 2,9 3,2 3,6 4 4,5 5 5,6 6,3 7,1 8 8,8 10 11 12,5 14,2 16
42,4
44,5
48,3
60,3
63,5
76,1
82,5
88,9
101,6
114,3
139,7
141,3
152,4
165,1
168,3
177,8
Outside diameter Wall thicknesses, T
D
a
Series
1 2 3 1,4 1,6 1,8 2 2,3 2,6 2,9 3,2 3,6 4 4,5 5 5,6 6,3 7,1 8 8,8 10 11 12,5 14,2 16
...