ISO 9330-5:2000

INTERNATIONAL ISO
STANDARD 9330-5
First edition
2000-06-15
Welded steel tubes for pressure
purposes — Technical delivery
conditions —
Part 5:
Submerged arc-welded unalloyed
and alloyed steel tubes with specified
low temperature properties
Tubes en acier soudés pour service sous pression —
Conditions techniques de livraison —
Partie 5: Tubes soudés à l'arc immergé en aciers non alliés et alliés
avec caractéristiques spécifiées à basse température
Reference number
©
ISO 2000
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ii © ISO 2000 – All rights reserved

Contents Page
Foreword.iv
1 Scope .1
2 Normative references .1
3 Symbols .2
4 Information to be supplied by the purchaser .3
5 Manufacturing process .4
6 Metallurgical properties .6
7 Dimensions, masses and tolerances.10
8 Technical delivery conditions .12
9 Inspection and testing.13
10 Samples .15
11 Test methods and results .17
12 Marking .22
13 Protection .22
14 Documents .22
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 9330 may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 9330-5 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 19,
Technical delivery conditions for steel tubes for pressure purposes.
ISO 9330 consists of the following parts, under the general title Welded steel tubes for pressure purposes —
Technical delivery conditions:
� Part 1: Unalloyed steel tubes with specified room temperature properties
� Part 2: Electric resistance and induction welded unalloyed and alloyed steel tubes with specified elevated
temperature properties
� Part 3: Electric resistance and induction welded unalloyed and alloyed steel tubes with specified low
temperature properties
� Part 4: Submerged arc-welded unalloyed and alloyed steel tubes with specified elevated temperature
properties
� Part 5: Submerged arc-welded unalloyed and alloyed steel tubes with specified low temperature properties
� Part 6: Longitudinally welded austenitic stainless steel tubes
iv © ISO 2000 – All rights reserved

INTERNATIONAL STANDARD ISO 9330-5:2000(E)
Welded steel tubes for pressure purposes — Technical delivery
conditions —
Part 5:
Submerged arc-welded unalloyed and alloyed steel tubes
with specified low temperature properties
1 Scope
This part of ISO 9330 specifies the technical delivery conditions for submerged arc-welded tubes of circular cross-
section, made of unalloyed or alloyed steel with specified low temperature properties. These tubes are intended for
pressure purposes in cases when the material is also used as part of a low temperature piping system.
The requirements of appropriate international application standards and relevant national legal regulations shall be
taken into account by the user. For pressure-containing equipment International Standard ISO 5730 is available.
For the general technical delivery requirements, see ISO 404.
NOTE The English words “tube” and “pipe” are synonymous.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 9330. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 9330 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
1)
ISO 148:1983 , Steel — Charpy impact test (V-notch).
ISO 377:1997, Steel and steel products — Location and preparation of samples and test pieces for mechanical
testing.
IS0 404:1992, Steel and steel products — General technical delivery requirements.
ISO 643:1983, Steels — Micrographic determination of the ferritic or austenitic grain size.
ISO 2566-1:1984, Steel — Conversion of elongation values — Part 1: Carbon and low alloy steels.
ISO 3205:1976, Preferred test temperatures.
ISO 3545-1:1989, Steel tubes and fittings — Symbols for use in specifications — Part 1: Tubes and tubular
accessories with circular cross-section.
1) This International Standard has been withdrawn and replaced by ISO 148-1:—, ISO 148-2:1998 and ISO 148-3:1998.
ISO 4200:1991, Plain end steel tubes, welded and seamless — General tables of dimensions and masses per unit
length.
ISO 4948-1:1982, Steels — Classification — Part 1: Classification of steels into unalloyed and alloy steels based
on chemical composition.
ISO/TR 4949:1989, Steel names based on letter symbols.
ISO 5173:1981, Fusion welded butt joints in steel — Transverse root and face bend test.
ISO 5177:1981, Fusion welded butt joints in steel — Transverse side bend test.
ISO 5252:1991, Steel tubes — Tolerance systems.
ISO 6761:1981, Steel tubes — Preparation of ends of tubes and fittings for welding.
ISO 6892:1998, Metallic materials — Tensile testing at ambient temperature.
ISO 7438:1985, Metallic materials — Bend test.
ISO 9765:1990, Submerged arc-welded steel tubes for pressure purposes — Ultrasonic testing of the weld seam
for the detection of longitudinal and/or transverse imperfections.
ISO 10474:1991, Steel and steel products — Inspection documents.
ISO 11496:1993, Seamless and welded steel tubes for pressure purposes — Ultrasonic testing of tube ends for the
detection of laminar imperfections.
ISO 12094:1994, Welded steel tubes for pressure purposes — Ultrasonic testing for the detection of laminar
imperfections in strip/plates used in the manufacture of welded tubes.
IS0 12096:1996, Submerged arc-welded steel tubes for pressure purposes — Radiographic testing of the weld
seam for the detection of imperfections.
ISO 14284:1996, Steel and iron — Sampling and preparation of samples for the determination of chemical
composition.
3 Symbols
3.1 Fundamental symbols
D is the specified outside diameter.
T is the specified wall thickness.
3.2 Symbols for tolerances
See ISO 5252.
3.3 Symbols for tests
3.3.1 Tensile test
See ISO 6892.
2 © ISO 2000 – All rights reserved

3.3.2 Hydraulic test
p is the test pressure.
E
� is the stress which occurs in the metal during the test.
4 Information to be supplied by the purchaser
4.1 Mandatory information
The purchaser shall state on his enquiry and order the following information:
a) the denomination “tube”;
b) reference to the relevant dimensional standard;
c) dimensions (outside diameter � wall thickness), see 7.1;
d) length, see 7.2;
e) tolerances if exact lengths greater than 12 m are ordered, see 7.3.4;
f) reference to this part of ISO 9330, i.e. ISO 9330-5;
g) steel grade, see Table 1;
h) test category for unalloyed steels, see 9.3.1.
4.2 Optional information
Enquiries and orders for tubes in accordance with this part of ISO 9330 shall be supplemented, if it is deemed
necessary by the purchaser, with the indication of one or more of the following optional requirements, which shall
be the subject of special agreements:
a) dimensions (inside diameter � wall thickness) see 7.1;
b) steelmaking process, see 5.1;
c) delivery condition, see 5.4;
d) special straightness requirements, see 7.3.6;
e) tolerances on the height of the weld seam, see 7.3.2;
f) bevelled ends, see 8.2;
g) product analysis, see 10.1.3;
h) tensile testing of weld for tubes over 219 mm but less than 508 mm outside diameter, see 10.1.3;
i) impact test on the weld and/or heat affected zone, see 10.1.3;
j) specific marking, see 12.3;
k) protective coating, see 13;
l) type of inspection and testing and corresponding document, see 9.2 and 14.
4.3 Example of an order
Example of an order conforming to the dimensional standard ISO 4200, with an outside diameter of 457 mm, a wall
thickness of 10 mm and a standard length (random length) of 4 m to 8 m, made of steel grade PL 21 with specified
elevated temperature properties to be submitted to specific inspection and testing to test category I involving the
issuing of an inspection document 3.1.B in accordance with ISO 10474:1991.
Tube ISO 4200 - 457 ����10-4to 8- ISO9330-4- PL 21-l-3.1.B
5 Manufacturing process
5.1 Steelmaking process
If requested, the purchaser shall be informed of the steelmaking process used.
Steels may be cast in ingots or may be strand cast. When steels of different grades are sequentially strand cast
identification of the resultant transition material is required. The producer shall remove the transition material by an
established procedure that positively separates the grades.
5.2 Deoxidation process
Steels intended for the production of tubes covered by this part of ISO 9330 shall be fully-killed.
5.3 Product-making process for tubes
A welded tube is obtained by shaping a flat-rolled product and then welding the edges. The weld may be
longitudinal or helical.
Tubes shall be submerged arc-welded (SAW) using at least one run on the inside and one run on the outside of the
tube. Unless otherwise agreed, the process of manufacture is left to the discretion of the manufacturer, provided
that the welding method and welder/welding operator have been approved in accordance with a qualified
procedure.
Tubes covered by this part of ISO 9330 may be hot finished or cold finished. The terms “hot finished” and “cold
finished” apply to the condition of the tube before it is heat treated, if applicable.
4 © ISO 2000 – All rights reserved

5.4 Delivery condition
Tubes covered by this part of ISO 9330 shall be supplied heat-treated over their full length. The following heat
treatments shall be used depending on the type of steel, see Table 1.
� normalizing;
� normalizing and tempering;
� quenching and tempering.
Table 1 — Heat treatment conditions
Quenching and tempering temperature
°C
Reference Normalizing Tempering
Steel grade
temperature temperature
heat treatment
Hard
...