Petroleum and natural gas industries — Induction bends, fittings and flanges for pipeline transportation systems — Part 3: Flanges

ISO 15590-3:2004 applies to weldneck and blind flanges (full face, raised face, and RTJ groove) as well as anchor, swivel-ring flanges and orifice flanges. ISO 15590-3:2004 specifies the technical requirements for carbon steel and low-alloy steel forged flanges for use in pipeline transportation systems for the petroleum and natural gas industries as defined in ISO 13623. ISO 15590-3:2004 designates those categories of flanges that meet the industry's need to match ISO 3183 pipe. These flanges are for normal and low-temperature service and include supplementary requirements where required for sour service. Materials for, or the attachment of, factory-welded extensions, bolting materials, gaskets, slip-on flanges or flanged fittings are not covered by ISO 15590-3:2004. ISO 15590-3:2004 is not applicable to integrally cast or forged flanges for valves, pumps or other equipment. ISO 15590-3:2004 does not cover the selection of the flange category or pressure class. Sizes and pressure classes listed in ISO 7005-1 and applicable to ISO 15590-3:2004 are as follows: DN 10 (NPS 1/2) to DN 1500 (NPS 60); PN 20 (class 150), PN 50 (class 300), PN 100 (class 600), PN 150 (class 900), PN 250 (class 1500), PN 420 (class 2500).

Industries du pétrole et du gaz naturel — Coudes d'induction, raccords et brides pour systèmes de transport par conduites — Partie 3: Brides

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Publication Date
02-Nov-2004
Current Stage
9599 - Withdrawal of International Standard
Completion Date
21-Mar-2022
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INTERNATIONAL ISO
STANDARD 15590-3
First edition
2004-11-01


Petroleum and natural gas industries —
Induction bends, fittings and flanges for
pipeline transportation systems —
Part 3:
Flanges
Industries du pétrole et du gaz naturel — Coudes d'induction, raccords
et brides pour systèmes de transport par conduites —
Partie 3: Brides




Reference number
ISO 15590-3:2004(E)
©
ISO 2004

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ISO 15590-3:2004(E)
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ii © ISO 2004 – All rights reserved

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ISO 15590-3:2004(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 3
4 Symbols and abbreviated terms. 4
5 Designation of flanges. 4
6 Pressure class and design. 5
7 Information to be supplied by the purchaser.5
7.1 Principal information . 5
7.2 Supplementary information . 6
8 Manufacturing . 6
8.1 Manufacturing procedure specification. 6
8.2 Starting material. 6
8.3 Hubs . 6
8.4 Heat treatment . 7
9 Testing and inspection. 7
9.1 General requirements. 7
9.2 Extent of testing and inspection . 7
9.3 Chemical composition. 8
9.4 Physical testing. 8
9.5 NDT. 12
9.6 Dimensions. 13
9.7 Hydrostatic testing. 14
9.8 Weldability . 14
9.9 Repair welding. 15
10 Documentation . 15
10.1 Inspection document. 15
10.2 Manufacturing record book . 15
11 Marking . 15
Bibliography . 17

© ISO 2004 – All rights reserved iii

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ISO 15590-3:2004(E)
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 2.
The main task of technical committees is to prepare International Standards. 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 document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 15590-3 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries, Subcommittee SC 2, Pipeline transportation systems.
ISO 15590 consists of the following parts, under the general title Petroleum and natural gas industries —
Induction bends, fittings and flanges for pipeline transportation systems:
— Part 1: Induction bends
— Part 2: Fittings
— Part 3: Flanges

iv © ISO 2004 – All rights reserved

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ISO 15590-3:2004(E)
Introduction
Users of this part of ISO 15590 should be aware that further or differing requirements may be needed for
individual applications. This part of ISO 15590 is not intended to inhibit a manufacturer from offering, or the
purchaser from accepting, alternative equipment or engineering solutions for the individual application. This
can be particularly applicable where there is innovative or developing technology. Where an alternative is
offered, the manufacturer should identify any variations from this part of ISO 15590 and provide details.

© ISO 2004 – All rights reserved v

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INTERNATIONAL STANDARD ISO 15590-3:2004(E)

Petroleum and natural gas industries — Induction bends,
fittings and flanges for pipeline transportation systems —
Part 3:
Flanges
1 Scope
This part of ISO 15590 applies to weldneck and blind flanges (full face, raised face, and RTJ groove) as well
as anchor, swivel-ring flanges and orifice flanges.
This part of ISO 15590 specifies the technical requirements for carbon steel and low-alloy steel forged flanges
for use in pipeline transportation systems for the petroleum and natural gas industries as defined in
ISO 13623.
This part of ISO 15590 designates those categories of flanges that meet the industry's need to match
ISO 3183 pipe. These flanges are for normal and low-temperature service and include supplementary
requirements where required for sour service.
Materials for, or the attachment of, factory-welded extensions, bolting materials, gaskets, slip-on flanges or
flanged fittings are not covered by this part of ISO 15590.
This part of ISO 15590 is not applicable to integrally cast or forged flanges for valves, pumps or other
equipment.
This part of ISO 15590 does not cover the selection of the flange category or pressure class. Sizes and
pressure classes listed in ISO 7005-1 and applicable to this part of ISO 15590 are as follows:
 DN 10 (NPS 1/2) to DN 1500 (NPS 60);
 PN 20 (class 150), PN 50 (class 300), PN 100 (class 600), PN 150 (class 900), PN 250 (class 1500),
PN 420 (class 2500).
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 148-1, Metallic material —- Charpy pendulum impact test — Part 1: Test method
ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical
testing
ISO 783, Metallic materials — Tensile testing at elevated temperature
ISO 2566-1, Steel — Conversion of elongation values — Part 1: Carbon and low alloy steels
© ISO 2004 – All rights reserved 1

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ISO 15590-3:2004(E)
ISO 3183-1, Petroleum and natural gas industries — Steel pipe for pipelines — Technical delivery
conditions — Part 1: Pipes of requirement class A
ISO 3183-2, Petroleum and natural gas industries — Steel pipe for pipelines — Technical delivery
conditions — Part 2: Pipes of requirement class B
ISO 3183-3, Petroleum and natural gas industries — Steel pipe for pipelines — Technical delivery
conditions — Part 3: Pipes of requirement class C
ISO 4885, Ferrous products — Heat treatments — Vocabulary
ISO 6507-1:1997, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6892, Metallic materials — Tensile testing at ambient temperature
ISO 7005-1:1992, Metallic flanges — Part 1: Steel flanges
ISO/TR 7705:1991, Guidelines for specifying Charpy V-notch impact prescriptions in steel specifications
ISO 9327-1, Steel forgings and rolled or forged bars for pressure purposes — Technical delivery conditions —
Part 1: General requirements
ISO 9712, Non-destructive testing — Qualification and certification of personnel
ISO 10474:1991, Steel and steel products — Inspection documents
ISO 11496, Seamless and welded steel tubes for pressure purposes — Ultrasonic testing of tube ends for the
detection of laminar imperfections
ISO 12095, Seamless and welded steel tubes for pressure purposes — Liquid penetrant testing
ISO 13623, Petroleum and natural gas industries — Pipeline transportation systems
ISO 13664, Seamless and welded steel tubes for pressure purposes — Magnetic particle inspection of the
tube ends for the detection of laminar imperfections
ISO 13665, Seamless and welded steel tubes for pressure purposes — Magnetic particle inspection of the
tube body for the detection of surface imperfections
ISO 15156-2:2003, Petroleum and natural gas industries — Materials for use in H S-containing environments
2
in oil and gas production — Part 2: Cracking-resistant carbon and low alloy steels, and the use of cast irons
ISO 15590-1:2001, Petroleum and natural gas industries — Induction bends, fittings and flanges for pipeline
transportation systems — Part 1: Induction bends
ISO 15590-2, Petroleum and natural gas industries — Induction bends, fittings and flanges for pipeline
transportation systems — Part 2: Fittings
ASME Boiler and Pressure Vessel Code; Section VIII Division 1, Rules for Construction of Pressure Vessels
ASME B16.5, Pipe Flanges and Flanged Fittings — NPS 1/2 through 24
1)
ASME B16.36 , Orifice Flanges
ASME B16.47, Large Diameter Steel Flange —– NPS 26 through NPS 60
ASME B31.3, Process piping
1)
ASTM A 370-03a , Standard Test Methods and Definitions for Mechanical Testing of Steel Products
ASTM E 112-96e3, Standard Test Methods for Determining Average Grain Size

1) American Society for Testing and Materials, 100 Bar Harbor Drive, West Conshohocken, PA 19428-2959, USA
2 © ISO 2004 – All rights reserved

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ISO 15590-3:2004(E)
2)
MSS SP 44 , 1996 Steel Pipeline Flanges
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4885 and the following apply.
3.1
ANSI rating class
numerical pressure design class defined in ASME B16.5 and used for reference purposes
NOTE The ANSI rating class is designated by the word “Class” followed by a number.
[1]
[ISO 14313:1999]
3.2
by agreement
agreed between manufacturer and purchaser
[1]
[ISO 14313:1999]
3.3
heat
batch of steel prepared in one steel-making operation
[ISO 15590-1:2001]
3.4
imperfection
irregularity in the wall or on the surface detectable by methods described in this part of ISO 15590
3.5
manufacturing procedure specification
MPS
document which specifies the process control parameters and the acceptance criteria to be applied for all
manufacturing, inspection and testing activities performed during flange manufacture
NOTE Adapted from ISO 15590-2.
3.6
matching pipe
specified pipe grade and thickness to which the flange will be attached
3.7
pressure class
numerical pressure design class expressed in accordance with either the nominal pressure (PN) class or the
ANSI rating class
NOTE In this part of ISO 15590, the pressure class is stated by the PN class followed by the ANSI rating class
between brackets.
[1]
[ISO 14313:1999]

2) Manufacturer’s Standardization Society of the Valve and Fittings Industry, 127 Park Street, N.E., Vienna, Virginia
22180, USA
© ISO 2004 – All rights reserved 3

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ISO 15590-3:2004(E)
4 Symbols and abbreviated terms
A original cross-sectional area of the parallel length of a test specimen
o
CE carbon equivalent
DN nominal diameter
HIC hydrogen-induced cracking
HV Vickers hardness
ID inside diameter
L low-temperature service
LS low-temperature sour service
MPS manufacturing procedure specification
MT magnetic particle testing
N normal service
NDT non-destructive testing
NPS nominal pipe size
NS normal sour service
PN nominal pressure
PT liquid penetrant testing
R tensile strength

m
RTJ ring type joint
S sour service
SMTS specified minimum tensile strength
SMYS specified minimum yield strength
SSC sulfide stress cracking
t
specified wall thickness at the welding ends for flanges
T minimum design temperature
d min
UT ultrasonic testing

5 Designation of flanges
Flanges shall be designated as specified in Table 1.
Table 1 — Flange designations
Non-sour service Sour service
Temperature, T Flange Temperature, T Flange
d min d min
designation designation
°C °C
W 0 (N) W 0 (NS)
< 0 (L) < 0 (LS)

4 © ISO 2004 – All rights reserved

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ISO 15590-3:2004(E)
Flanges with a minimum design temperature lower than 0 °C shall demonstrate proven notch toughness in
accordance with Clause 9.
Flanges intended for sour service shall be so specified by the purchaser and meet the applicable
requirements of Clause 9.
6 Pressure class and design
The flange shall be capable of withstanding an internal pressure equal to the working pressure at the
temperature range required. Maximum pressures for the various pressure classes against temperature are
shown in Table 2.
Table 2 — Maximum pressures as a function of temperature
PN
20 50 100 150 250 420
Temperature
Class
°C
150 300 600 900 1500 2500
MPa (bar) MPa (bar) MPa (bar) MPa (bar) MPa (bar) MPa (bar)
1,96 (19,6) 5,11 (51,1) 10,2 (102) 15,3 (153) 25,5 (255) 42,6 (426)
−30 to 120
150 1,9 (19) 4,93 (49,3) 9,86 (98,6) 14,8 (148) 22,6 (226) 37,7 (377)
175 1,83 (18,3) 4,75 (47,5) 9,51 (95,1) 14,3 (143) 22,2 (222) 34,1 (341)
200 1,76 (17,6) 4,59 (45,9) 9,17 (91,7) 13,8 (138) 21,9 (219) 36,5 (365)
250 1,7 (17) 4,41 (44,1) 8,86 (88,6) 13,3 (133) 22,5 (225) 35,5 (355)
For any temperature below 30 °C, the rating shall be no greater than the rating shown for −30 °C.
For intermediate temperatures, linear interpolation should be used.
Ratings of flanges for temperatures greater than those given shall be by agreement.

If there are any deviations from the flange dimensions specified in ISO 7005-1, pressure-containment
calculations shall be made in accordance with an agreed pressure-vessel design standard such as ASME
Section VIII, Division 1.
The design calculations shall be available for review.
For pipeline applications, the design criteria shall be in accordance with ISO 7005-1:1992, Annex F.
NOTE External loads or moments are not covered by this part of ISO 15590. However, swivels and anchor flanges
can experience external loads and can be designed using the equivalent pressure method.
7 Information to be supplied by the purchaser
7.1 Principal information
The following information shall be provided:
a) flange designation, size and class;
b) quantity of flanges;
© ISO 2004 – All rights reserved 5

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ISO 15590-3:2004(E)
c) material grade;
d) wall thickness, specified minimum yield stre
...

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