EN 10253-4:2025

SLOVENSKI STANDARD
01-september-2025
Nadomešča:
SIST EN 10253-4:2008/AC:2009
Cevni fitingi za soležne zvare - 4. del: Kovna avstenitna in avstenitno-feritna
(dupleksna) nerjavna jekla s posebnimi zahtevami kontrole
Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex)
stainless steels with specific inspection requirements
Formstücke zum Einschweißen - Teil 4: Austenitische und austenitisch-ferritische
(Duplex-)Stähle mit besonderen Prüfanforderungen
Raccords à souder bout à bout - Partie 4 : Aciers inoxydables austénitiques et
austéno‐ferritiques avec contrôle spécifique
Ta slovenski standard je istoveten z: EN 10253-4:2025
ICS:
23.040.40 Kovinski fitingi Metal fittings
77.140.20 Visokokakovostna jekla Stainless steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 10253-4
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2025
EUROPÄISCHE NORM
ICS 23.040.40; 77.140.20 Supersedes EN 10253-4:2008
English Version
Butt-welding pipe fittings - Part 4: Wrought austenitic and
austenitic-ferritic (duplex) stainless steels with specific
inspection requirements
Raccords à souder bout à bout - Partie 4 : Aciers Formstücke zum Einschweißen - Teil 4: Austenitische
inoxydables austénitiques et austéno-ferritiques und austenitisch-ferritische (Duplex) nichtrostende
(duplex) avec contrôle spécifique Stähle mit besonderen Prüfanforderungen
This European Standard was approved by CEN on 21 July 2024.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10253-4:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 11
4 Symbols and abbreviations . 12
5 Classification and designation . 13
5.1 Classification of grades . 13
5.2 Designation of steel grades . 13
5.3 Designation of fittings . 13
5.3.1 General . 13
5.3.2 Elbows and return bends . 13
5.3.3 Reducers . 13
5.3.4 Tees . 14
5.3.5 Caps and dished ends . 14
6 Information to be supplied . 14
6.1 Mandatory information . 14
6.2 Options . 14
6.3 Examples of an order . 16
6.3.1 Example 1 . 16
6.3.2 Example 2 . 16
6.3.3 Example 3 . 16
6.3.4 Example 4 . 16
6.3.5 Example 5 . 16
6.3.6 Example 6 . 17
6.3.7 Example 7 . 17
7 Resistance to internal pressure . 17
7.1 General . 17
7.2 Fittings of type A . 17
7.3 Fittings of type B . 17
8 Manufacturing process . 18
8.1 Steelmaking process . 18
8.2 Product making process for fittings and heat treatment . 18
8.2.1 Product making process . 18
8.2.2 Welding . 19
8.2.3 Heat treatment condition . 20
9 Technical requirements. 20
9.1 General . 20
9.2 Chemical composition . 20
9.2.1 Cast analysis . 20
9.2.2 Product analysis . 20
9.3 Mechanical properties . 24
9.3.1 At room temperature . 24
9.3.2 At elevated temperature . 24
9.3.3 At low temperature . 24
9.4 Weldability . 29
9.5 Corrosion resistance. 29
10 Appearance and internal soundness (delivery conditions) . 29
10.1 Definition of surface imperfections . 29
10.2 Appearance . 30
10.3 Internal soundness . 31
11 Dimensions and tolerances . 31
11.1 Dimensions . 31
11.1.1 General . 31
11.1.2 Elbows . 31
11.1.3 Tees . 32
11.1.4 Reducers . 33
11.1.5 Caps and dished ends . 34
11.1.6 Preferred diameters and wall thicknesses . 35
11.2 Dimensional tolerances . 35
11.2.1 Diameter . 35
11.2.2 Out of roundness . 35
11.2.3 Wall thickness tolerances . 36
11.2.4 Tolerances on specific dimensions and form . 36
11.2.5 Corrugation . 37
11.3 Performance of the end bevelling . 38
12 Inspection . 38
12.1 Type of inspection . 38
12.2 Inspection documents . 39
12.2.1 Type of inspection documents . 39
12.2.2 Content of inspection documents . 39
12.3 Summary of inspection and testing . 40
13 Sampling . 42
13.1 Frequency of tests . 42
13.1.1 Test unit . 42
13.1.2 Number of test pieces per test unit . 44
13.2 Preparation of samples and test pieces . 44
13.2.1 Samples for product analysis . 44
13.2.2 Samples and test pieces for mechanical tests. 44
13.2.3 Test piece for the tensile test on the base material. 44
13.2.4 Test piece for the tensile test transverse to the weld . 44
13.2.5 Test piece for the weld bend test . 44
13.2.6 Test piece for the impact test . 44
13.2.7 Test piece for the intergranular corrosion test . 45
14 Test methods . 45
14.1 Chemical analysis . 45
14.2 Tensile test on the base material . 45
14.2.1 At room temperature . 45
14.2.2 At elevated temperature . 45
14.3 Transverse tensile test on the weld . 45
14.4 Ring expansion . 46
14.5 Weld bend test . 46
14.6 Impact testing . 46
14.7 Dimensional testing . 47
14.8 Visual testing (VT) . 47
14.9 Non-destructive testing (NDT) . 47
14.9.1 Personnel . 47
14.9.2 NDT of the weld . 47
14.9.3 Intergranular corrosion test . 48
14.9.4 NDT for the detection of laminar imperfections . 48
14.9.5 NDT for the detection of longitudinal imperfections . 48
14.9.6 NDT for the detection of transverse imperfections . 48
14.9.7 NDT of bars and forgings . 48
14.9.8 Technological test of weld . 48
14.10 Positive material identification (PMI) . 49
15 Marking . 49
16 Protection and packaging . 50
Annex A (normative) Dimensions . 51
Annex B (normative) Determination of pressure factors and wall thickness . 72
Annex C (normative) Pressure factor Tables for fittings of type A . 96
Annex D (informative) Wall thickness tables for fittings of type B . 114
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of Directive 2014/68/EU aimed to be covered . 137
Bibliography . 138

European foreword
This document (EN 10253-4:2025) 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 January 2026 and conflicting national standards shall
be withdrawn at the latest by January 2026.
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 10253-4:2008.
The main changes compared to the previous edition are listed below:
a) Concretization of the scope;
b) Restructuring of EN 10253-2 and EN 10253-4 and ensuring they align with each other;
c) Update of technical requirements and dimensions to reflect current market standards;
d) Correction of identical construction dimensions within the EN 10253 series;
e) Introduction of additional wall thickness and diameter values;
f) Introduction of test concept TC2 analogous to pipe standards;
g) Rewording of some options and new numbering;
h) Modification of test lot sizes;
i) Update of contents for ultrasonic testing;
j) Update to the contents of welding chapters;
k) Revision of figures;
l) Update of the terms and definitions;
m) Update of normative references;
n) Editorial revision to follow the latest design rules;
o) Revision of mechanical properties;
p) Update of metric elbows dimensions table.

Through its sub-committee SC 10 “Steel tubes, and iron and steel fittings”, (secretariat: UNI).
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
EN 10253 comprises a series of European Standards about Butt-welding pipe fittings, namely:
— Part 1: Wrought carbon steel for general use and without specific inspection requirements;
— Part 2: Non alloy and ferritic alloy steels with specific inspection requirements;
— Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection
requirements;
— Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection
requirements.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
In writing this document, the competent committee recognized that there are two broad types of
products which are commonly used, and it was decided to reflect these in the standard by differentiating
between the two parts.
EN 10253-3 describes fittings without formal reference to the pressure resistance, which are not
intended to be used in applications, covered by the Pressure Equipment Directive (2014/68/EU) in
categories I to IV.
EN 10253-4 defines two types of fittings: Type A fittings have the same wall thickness at the welding ends
and at the body of the fitting as a pipe having the same specified wall thickness. Their resistance to
internal pressure is, in general, less than that of a straight pipe with the same dimensions. Type B fittings
showing increased wall thickness at the body of the fitting are designed to resist the same internal
pressure as a straight pipe with the same dimensions. These two types of fittings are intended to be used
in applications covered by the EU Directive 2014/68/EU. According to this Directive and further
interpretation guidelines (e.g. guideline G – 19), seamless fittings are considered as materials whereas
welded fittings are considered as components. Therefore, in some areas of this document, provisions for
seamless and welded fittings are different.
The selection of steel type and requirement level depend on many factors; the properties of the fluid to
be conveyed, the service conditions, the design code and any statutory requirements should all be taken
into consideration. Therefore, this document gives no detailed guidelines for the application of different
parts. It is the ultimate responsibility of the user to select the appropriate part for the intended
application.
1 Scope
This document specifies the technical delivery requirements for seamless and welded butt-welding
fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made of austenitic and
austenitic-ferritic (duplex) stainless steel in two test-categories which are intended for pressure
purposes at room temperature, at low temperature or at elevated temperatures, and for the transmission
and distribution of fluids and gases.
It specifies:
a) type of fittings;
1) type A: butt-welding fittings with reduced pressure factor;
2) type B: butt-welding fittings for use at full service pressure;
b) steel grades and their chemical compositions;
c) mechanical properties;
d) dimensions and tolerances;
e) requirements for inspection and testing;
f) inspection documents;
g) marking;
h) protection and packaging.
NOTE The selection of the appropriate fitting (material, thickness) is the ultimate responsibility of the
manufacturer of the pressure equipment (see European Legislation for Pressure Equipment). In the case of a
harmonized supporting standard for materials, presumption of conformity to the ESRs is limited to technical data
of materials in the standard and does not presume adequacy of the material to a specific item of equipment.
Consequently, it is essential that the technical data stated in the material standard be assessed against the design
requirements of this specific item of equipment to verify that the ESRs of the PED are satisfied.
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 10020:2000, Definition and classification of grades of steel
EN 10021:2006, General technical delivery conditions for steel products
EN 10027-1:2016, Designation systems for steels — Part 1: Steel names
EN 10027-2:2015, Designation systems for steels — Part 2: Numerical system
EN 10028-7:2016, Flat products made of steels for pressure purposes — Part 7: Stainless steels
EN 10088-1:2023, Stainless steels — Part 1: List of stainless steels
EN 10160:1999, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection
method)
EN 10168:2004, Steel products — Inspection documents — List of information and description
EN 10204:2004, Metallic products — Types of inspection documents
EN 10216-5:2021, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 5:
Stainless steel tubes
EN 10217-7:2021, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 7:
Stainless steel tubes
EN 10222-5:2017, Steel forgings for pressure purposes — Part 5: Martensitic, austenitic and austenitic-
ferritic stainless steels
EN 10228-4:2016, Non-destructive testing of steel forgings — Part 4: Ultrasonic testing of austenitic and
austenitic-ferritic stainless steel forgings
EN 10266:2003, Steel tubes, fittings and structural hollow sections — Symbols and definitions of terms for
use in product standards
EN 10272:2016, Stainless steel bars for pressure purposes
EN 13480-3:2024, Metallic industrial piping — Part 3: Design and calculation
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 2566-2:2021, Steel — Conversion of elongation values — Part 2: Austenitic steels (ISO 2566-2:2021,
Corrected version 2022-05)
EN ISO 3166-1:2020, Codes for the representation of names of countries and their subdivisions — Part 1:
Country code (ISO 3166-1:2020)
EN ISO 3651-2:1998, Determination of resistance to intergranular corrosion of stainless steels — Part 2:
Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing
sulfuric acid (ISO 3651-2:1998)
EN ISO 4136:2022, Destructive tests on welds in metallic materials — Transverse tensile test
(ISO 4136:2022)
EN ISO 4885:2018, Ferrous materials — Heat treatments — Vocabulary (ISO 4885:2018)
EN ISO 5173:2023, Destructive tests on welds in metallic materials — Bend tests (ISO 5173:2023)
EN ISO 5817:2023, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding
excluded) — Quality levels for imperfections (ISO 5817:2023)
EN ISO 6892-1:2019, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
(ISO 6892-1:2019)
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 9016:2022, Destructive tests on welds in metallic materials — Impact tests — Test specimen
location, notch orientation and examination (ISO 9016:2022)
EN ISO 9606-1:2017, Qualification testing of welders — Fusion welding — Part 1: Steels (ISO 9606-1:2012
including Cor 1:2012 and Cor 2:2013)
EN ISO 9712:2022, Non-destructive testing — Qualification and certification of NDT personnel
(ISO 9712:2021)
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 10893-4:2011, Non-destructive testing of steel tubes — Part 4: Liquid penetrant inspection of
seamless and welded steel tubes for the detection of surface imperfections (ISO 10893-4:2011)
EN ISO 10893-6:2019, Non-destructive testing of steel tubes — Part 6: Radiographic testing of the weld
seam of welded steel tubes for the detection of imperfections (ISO 10893-6:2019)
EN ISO 10893-7:2019, Non-destructive testing of steel tubes — Part 7: Digital radiographic testing of the
weld seam of welded steel tubes for the detection of imperfections (ISO 10893-7:2019)
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 14284:2022, Steel and iron — Sampling and preparation of samples for the determination of
chemical composition (ISO 14284:2022)
EN ISO 14732:2013, Welding personnel — Qualification testing of welding operators and weld setters for
mechanized and automatic welding of metallic materials (ISO 14732:2013)
EN ISO 15614-1:2017, Specification and qualification of welding procedures for metallic materials —
Welding procedure test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys
(ISO 15614-1:2017, Corrected version 2017-10-01)

As impacted by EN ISO 10893-2:2011/A1:2020.
As impacted by EN ISO 10893-8:2011/A1:2020.
As impacted by EN ISO 10893-10:2011/A1:2020.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 10020:2000, EN 10021:2006,
EN ISO 377:2017 and EN ISO 4885:2018 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://www.iso.org/obp/
— IEC Electropedia: available at http://www.electropedia.org/
3.1
employer
organization for which a person works on a regular basis
Note 1 to entry: The employer may be either the fitting manufacturer or supplier or a third-party organization
providing a service, e.g. NDT.
3.2
model
designation for elbows, return bends, reducers and tees
Note 1 to entry: For elbows and return bends the model defines the bending diameter of the piece.
Note 2 to entry: For reducers the model defines concentric or eccentric or concentric straight or eccentric
straight shape of the piece.
Note 3 to entry: For caps the model defines the shape of the piece.
Note 4 to entry; For tees the model defines tee, pulled tee, branch welded tee (v-welded) and branch welded tee
(circumferential welded) shape of piece.
3.3
purchaser
person or organization that orders products in accordance with this document
Note 1 to entry: The purchaser is not necessarily, but may be, a manufacturer of pressure equipment in
accordance with the EU Directive listed in Annex ZA.
Note 2 to entry: Where a purchaser has responsibilities under this EU Directive, this standard will provide a
presumption of conformity with the essential requirements of the Directive so identified in Annex ZA.
3.4
weld during manufacture
weld made for obtaining a fitting
Note 1 to entry: This term does not include the tube welds when a tube is used as starting material.
3.5
seamless fitting
fitting manufactured without welding from starting material which is not welded
3.6
welded fitting
fitting made from welded starting material or fitting where welding is a part of the manufacturing process
3.7
test category
classification that indicates their extent and level of inspection and testing
4 Symbols and abbreviations
For the purposes of this document, the symbols given in EN 10266:2003 and the following apply.
A
Percentage of elongation after rupture, with reference to gauge length of 5,65 S
o
B Back to face distance for return bends, expressed in millimetres
C Centre to centre distance for return bends (C = 2R), expressed in millimetres
Specified outside diameter for elbows, return bends, equal tees, caps and the major outside
D
diameter for reducers and reducing tees, expressed in millimetres
D
Specified minor outside diameter for reducers and reducing tees, expressed in millimetres
D
Maximum outside diameter in one section, expressed in millimetres
max
D
Minimum outside diameter in the same section, expressed in millimetres
min
Distance from the axis of the branch outlet to the face of the centre body of tees, expressed in
millimetres
F
Distance from the centre of one face to the centre of bending of 90° elbow
Distance from the axis of the centre line to the face of the branch outlet expressed in
G
millimetres
Distance from the face of the branch outlet to the body of the pulled tee, expressed in
h
millimetres
Inside diameter at the welding ends of elbows, return bends, equal tees and at the major
ID
welding end of reducers and reducing tees (ID = D − 2T)
ID Inside diameter at the minor welding end of reducers and reducing tees (ID = D − 2T )
1 1 1 1
K Total height for caps, expressed in millimetres
L Face to face distance for reducers, expressed in millimetres
P Tolerance on the form of elbows
R Bending radius of elbows and return bends, expressed in millimetres
R
Inside spherical radius of cap
R
Inside knuckle radius of cap
R
Tensile strength, expressed in megapascals
m
R
Minimum 0,2 % proof strength, plastic extension expressed in megapascals
p0,2
R
Minimum 1,0 % proof strength, plastic extension expressed in megapascals
p1,0
Specified wall thickness at the welding ends for elbows, return bends, equal tees and bends
T
or on the D end for reducers and reducing tees, expressed in millimetres
Specified wall thickness on the D welding end of reducers and reducing tees, expressed in
T
millimetres
TC Test category
X Tolerance on the form of fittings
Z Distance from the extrados to the centre of a 45° elbow at the welding ends
5 Classification and designation
5.1 Classification of grades
In accordance with the classification system in EN 10088-1:2023, the steel grades covered in this
document are classified according to their structure into:
— austenitic steels;
— austenitic–ferritic (duplex) steels.
For more details, see EN 10088-1:2023.
5.2 Designation of steel grades
For fittings covered by this document the steel designation consists of:
— number of this document (EN 10253-4:2024);
plus either:
— steel name in accordance with EN 10027-1:2016;
or
— steel number allocated in accordance with EN 10027-2:2015.
5.3 Designation of fittings
5.3.1 General
Fittings are designated by their name and the following parameters.
5.3.2 Elbows and return bends
Elbows and return bends are designated by the following parameters:
a) model (2D, 3D 5D, D+100, 3DM or 5DM);
b) type (type A or type B);
c) angle;
d) outside diameter (D);
e) wall-thickness (T).
5.3.3 Reducers
Reducers are designated by the following parameters:
a) model (concentric (con) or eccentric (ecc) or concentric straight (con str) or eccentric straight
(ecc str));
b) type (type A or type B);
c) major diameter (D) and wall-thickness (T);
d) minor diameter (D ) and wall-thickness (T ).
1 1
For straight reducers the embodiment shall be noticed.
5.3.4 Tees
Equal and reducing tees are designed by the following parameters:
a) model (tee, pulled tee, branch welded tee (v-welded), or branch welded tee (circumferential
welded));
b) type (type A or type B);
c) major diameter (D) and minor diameter (D );
d) wall-thickness (T) and wall-thickness (T ).
NOTE If only one pair of dimension (D x T) is given, an equal tee is meant.
For pulled tees and branch welded tees the embodiment shall be noticed.
5.3.5 Caps and dished ends
Caps and dished ends are designated by the following parameters:
a) model cap (cap) or dished end (end);
b) type (type A or type B);
c) outside diameter (D);
d) wall-thickness (T).
6 Information to be supplied
6.1 Mandatory information
The following information shall be supplied at the time of enquiry and order:
a) quantity required (number of pieces);
b) reference to this document;
c) designation of fittings (see 5.3);
d) designation of the steel grade (see 5.2);
e) test category 1 or 2 (TC1/TC2) (see 12.3);
f) options, if any (see 6.2).
6.2 Options
A number of options are specified in this document and these are listed below. In the event that no option
has been specified at the time of enquiry and order, the fittings shall be supplied in accordance with the
basic specification (see 6.1).
1) Method of manufacture of the fitting (see 8.2.1);
2) starting product form and/or delivery condition (see 8.2.1);
NOTE Use for ordering seamless (S) or welded (W) fittings.
3) reporting of method of manufacture (see 8.2.1);
4) starting materials when manufacturing seamless fittings (see 8.2.1);
5) deviations from finished weld requirement (see 8.2.2.3);
6) heat treatment to be applied (see 8.2.3.1);
7) other steel grades in accordance with harmonized material standards (see 9.1);
8) product analysis (see 9.2.2 and Table 10);
9) verification of impact properties at room temperature (see 9.3.1 and Table 10);
10) agreed mechanical properties for wall thicknesses (see 9.3.1 and Table 10);
11) verification of tensile properties at elevated temperature (see 9.3.2 and Table 10);
12) verification of impact properties at low temperature (see 9.3.3 and Table 10);
13) intergranular corrosion test (see 9.5 and Table 10);
14) pickling (see 10.2);
15) shot blasting or bright annealing (see 10.2);
16) pickling and passivation (see 10.2);
17) tolerance on diameter to inside (see 11.2.1.1);
18) special tolerances (see 11.2.1.2);
19) plus tolerances on the body of the fitting (see 11.2.3);
20) special ends preparation (see 11.3);
21) type of inspection document other than the standard document (see 12.2.1);
22) tensile test transverse to the weld at room temperature (see Table 10 and 14.3);
23) bend test transverse to the weld (see Table 10 and 14.5);
24) impact test of the heat affected zone (see Table 10 and 14.6.1);
25) liquid penetrant testing of weld and weld ends (see Table 10 and 14.9.2);
26) liquid penetrant testing of surfaces (see Table 10 and 14.9.2);
27) NDT for the detection of laminar imperfections (see Table 10 and 14.9.4);
28) NDT of bars and forgings (see Table 10 and 14.9.7);
29) positive material identification (PMI) (see Table 10 and 14.10);
30) registration records of the temperatures (see 13.1.1);
31) test unit size – Table 13 (see 13.1.1);
32) test unit size – purchase order (see 13.1.1);
33) verification of impact properties transverse to the weld (see 13.2.6);
34) additional marking (see Clause 15);
35) special packaging (see Clause 16).
6.3 Examples of an order
6.3.1 Example 1
1 000 elbows in accordance with this docume
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