EN ISO 15156-2:2020

Petroleum and natural gas industries - Materials for use in H2S-containing environments in oil and gas production - Part 2: Cracking-resistant carbon and low-alloy steels, and the use of cast irons (ISO 15156-2:2020)

This document gives requirements and recommendations for the selection and qualification of carbon and low-alloy steels for service in equipment used in oil and natural gas production and natural gas treatment plants in H2S-containing environments, whose failure can pose a risk to the health and safety of the public and personnel or to the environment. It can be applied to help to avoid costly corrosion damage to the equipment itself. It supplements, but does not replace, the materials requirements of the appropriate design codes, standards or regulations.
This document addresses the resistance of these steels to damage that can be caused by sulfide stress cracking (SSC) and the related phenomena of stress-oriented hydrogen-induced cracking (SOHIC) and soft-zone cracking (SZC).
This document also addresses the resistance of these steels to hydrogen-induced cracking (HIC) and its possible development into stepwise cracking (SWC).
This document is concerned only with cracking. Loss of material by general (mass loss) or localized corrosion is not addressed.
Table 1 provides a non-exhaustive list of equipment to which this document is applicable, including exclusions.
This document applies to the qualification and selection of materials for equipment designed and constructed using load controlled design methods. For design utilizing strain-based design methods, see ISO 15156-1:2020, Clause 5.
Annex A lists SSC-resistant carbon and low alloy steels, and A.2.4 includes requirements for the use of cast irons.
This document is not necessarily suitable for application to equipment used in refining or downstream processes and equipment.

Erdöl- und Erdgasindustrie - Werkstoffe für den Einsatz in H2S-haltiger Umgebung bei der Öl- und Gasgewinnung - Teil 2: Gegen Rissbildung beständige unlegierte und niedriglegierte Stähle und Gusseisen (ISO 15156-2:2020)

Dieses Dokument nennt Anforderungen und gibt Empfehlungen für die Auswahl und Qualifizierung von unlegierten und niedriglegierten Stählen für den Betrieb in Einrichtungen der Öl  und Gasgewinnung und in Erdgasbehandlungsanlagen im Bereich H2S haltiger Umgebungen, deren Versagen ein mögliches Gesundheits  und Sicherheitsrisiko für die Allgemeinheit und das Personal oder für die Umwelt darstellen kann. Es kann angewendet werden zur Vermeidung kostspieliger Beschädigungen infolge von Korrosion der Anlage selbst. Es ergänzt, ersetzt aber nicht die in einschlägigen Konstruktionsrichtlinien, Normen oder Regelwerken enthaltenen Anforderungen an Werkstoffe.
Dieses Dokument behandelt die Beständigkeit dieser Stähle gegen Beschädigungen, die durch H2S induzierte Spannungsrisskorrosion (SSC) und die damit verbundenen Erscheinungen der spannungsorientierten wasserstoffinduzierten Rissbildung (SOHIC) und der Weichzonenrissbildung (SZC) verursacht werden können.
Dieses Dokument behandelt außerdem die Beständigkeit dieser Stähle gegen wasserstoffinduzierte Rissbildung (HIC) und deren mögliche Verbindung zu Stufenrissen (SWC).
Dieses Dokument behandelt ausschließlich die Rissbildung. Es befasst sich nicht mit Werkstoffverlusten durch allgemeine (durch Massenverlust bedingte) oder örtliche Korrosion.
Tabelle 1 enthält als nicht erschöpfende Liste eine Übersicht von Ausrüstungen, die in den Anwendungsbereich dieses Dokumentes fallen, einschließlich Ausnahmen.
Dieses Dokument gilt für die Qualifizierung und Auswahl von Werkstoffen für Ausrüstungen, die unter Anwendung von lastgesteuerten Auslegungsverfahren ausgelegt und gebaut wurden. Für Konstruktionen, bei denen auf Dehnung beruhende Auslegungsverfahren zur Anwendung kommen, siehe ISO 15156 1:2020, Abschnitt 5.
Anhang A enthält eine Auflistung von SSC beständigen unlegierten und niedriglegierten Stählen und A.2.4 enthält Anforderungen an die Verwendung von Gusseisen.
Dieses Dokument ist nicht zwangsläufig auch für die Anwendung auf Ausrüstungen in Raffinierungs  oder nachgeschalteten Verfahren und Einrichtungen geeignet.

Industries du pétrole et du gaz naturel - Matériaux pour utilisation dans des environnements contenant de l'hydrogène sulfuré (H2S) dans la production de pétrole et de gaz - Partie 2: Aciers au carbone et aciers faiblement alliés résistants à la fissuration, et utilisation de fontes (ISO 15156-2:2020)

Industrija za predelavo nafte in zemeljskega plina - Materiali za uporabo v okoljih s H2S v proizvodnji olja in plina - 2. del: Proti razpokam odporna ogljikova in malolegirana jekla ter uporaba litega železa (ISO 15156-2:2020)

General Information

• Status: Published
• Publication Date: 24-Nov-2020
• Withdrawal Date: 30-May-2021
• ICS: 75.180.01 - Equipment for petroleum and natural gas industries in general
• Technical Committee: CEN/TC 12 - Materials, equipment and offshore structures for petroleum and natural gas industries
• Drafting Committee: CEN/TC 12 - Materials, equipment and offshore structures for petroleum and natural gas industries
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 25-Nov-2020
• Completion Date: 25-Nov-2020
• Ref Project: SIST EN ISO 15156-2:2021 - Petroleum and natural gas industries - Materials for use in H2S-containing environments in oil and gas production - Part 2: Cracking-resistant carbon and low-alloy steels, and the use of cast irons (ISO 15156-2:2020)

Relations

• Replaces: EN ISO 15156-2:2015 - Petroleum and natural gas industries - Materials for use in H2S-containing environments in oil and gas production - Part 2: Cracking-resistant carbon and low alloy steels, and the use of cast irons (ISO 15156-2:2015)
• Effective Date: 16-Oct-2019

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2021
Nadomešča:
SIST EN ISO 15156-2:2015
Industrija za predelavo nafte in zemeljskega plina - Materiali za uporabo v okoljih s
H2S v proizvodnji olja in plina - 2. del: Proti razpokam odporna ogljikova in
malolegirana jekla ter uporaba litega železa (ISO 15156-2:2020)
Petroleum and natural gas industries - Materials for use in H2S-containing environments
in oil and gas production - Part 2: Cracking-resistant carbon and low-alloy steels, and the
use of cast irons (ISO 15156-2:2020)
Erdöl- und Erdgasindustrie - Werkstoffe für den Einsatz in H2S-haltiger Umgebung bei
der Öl- und Gasgewinnung - Teil 2: Gegen Rissbildung beständige unlegierte und
niedriglegierte Stähle und Gusseisen (ISO 15156-2:2020)
Industries du pétrole et du gaz naturel - Matériaux pour utilisation dans des
environnements contenant de l'hydrogène sulfuré (H2S) dans la production de pétrole et
de gaz - Partie 2: Aciers au carbone et aciers faiblement alliés résistants à la fissuration,
et utilisation de fontes (ISO 15156-2:2020)
Ta slovenski standard je istoveten z: EN ISO 15156-2:2020
ICS:
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
77.060 Korozija kovin Corrosion of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 15156-2
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2020
EUROPÄISCHE NORM
ICS 75.180.01 Supersedes EN ISO 15156-2:2015
English Version
Petroleum and natural gas industries - Materials for use in
H2S-containing environments in oil and gas production -
Part 2: Cracking-resistant carbon and low-alloy steels, and
the use of cast irons (ISO 15156-2:2020)
Industries du pétrole et du gaz naturel - Matériaux Erdöl- und Erdgasindustrie - Werkstoffe für den
pour utilisation dans des environnements contenant de Einsatz in H2S-haltiger Umgebung bei der Öl- und
l'hydrogène sulfuré (H2S) dans la production de Gasgewinnung - Teil 2: Gegen Rissbildung beständige
pétrole et de gaz - Partie 2: Aciers au carbone et aciers unlegierte und niedriglegierte Stähle und Gusseisen
faiblement alliés résistants à la fissuration, et (ISO 15156-2:2020)
utilisation de fontes (ISO 15156-2:2020)
This European Standard was approved by CEN on 12 October 2020.

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, 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15156-2:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 15156-2:2020) has been prepared by Technical Committee ISO/TC 67
"Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries"
in collaboration with Technical Committee CEN/TC 12 “Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries” the secretariat of which is held by NEN.
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 May 2021, and conflicting national standards shall be
withdrawn at the latest by May 2021.
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 ISO 15156-2:2015.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 15156-2:2020 has been approved by CEN as EN ISO 15156-2:2020 without any
modification.
INTERNATIONAL ISO
STANDARD 15156-2
Fourth edition
2020-11
Petroleum and natural gas
industries — Materials for use in H S-
containing environments in oil and
gas production —
Part 2:
Cracking-resistant carbon and low-
alloy steels, and the use of cast irons
Industries du pétrole et du gaz naturel — Matériaux pour utilisation
dans des environnements contenant de l'hydrogène sulfuré (H S) dans
la production de pétrole et de gaz —
Partie 2: Aciers au carbone et aciers faiblement alliés résistants à la
fissuration, et utilisation de fontes
Reference number
ISO 15156-2:2020(E)
©
ISO 2020
ISO 15156-2:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 15156-2:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 3
4 Symbols and abbreviated terms . 6
5 Purchasing information . 7
6 Factors affecting the behaviour of carbon and low alloy steels in H S-containing
environments . 7
7 Qualification and selection of carbon and low-alloy steels with resistance to SSC,
SOHIC and SZC . 8
7.1 Option 1 — Selection of SSC-resistant steels (and cast irons) using A.2 . 8
7.1.1 For p < 0,3 kPa (0,05 psi) . 8
HS
7.1.2 For p ≥ 0,3 kPa (0,05 psi) . 8
HS
7.2 Option 2 — Selection of steels for specific sour-service applications or for ranges
of sour service . 8
7.2.1 Sulfide stress cracking . 8
7.2.2 SOHIC and SZC .10
7.3 Hardness requirements .10
7.3.1 General.10
7.3.2 Parent metals .10
7.3.3 Welds .11
7.4 Other fabrication methods .16
8 Evaluation of carbon and low alloy steels for their resistance to HIC/SWC .16
9 Marking, labelling, and documentation .17
Annex A (normative) SSC-resistant carbon and low alloy steels (and requirements and
recommendations for the use of cast irons) .18
Annex B (normative) Qualification of carbon and low-alloy steels for H S service by
laboratory testing .27
Annex C (informative) Determination of H S partial pressure and use of alternative parameters .35
Annex D (informative) Recommendations for determining pH .40
Annex E (informative) Information that should be supplied for material purchasing .45
Bibliography .47
ISO 15156-2:2020(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explan
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