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ISO 17781:2017

(Main)

Petroleum, petrochemical and natural gas industries — Test methods for quality control of microstructure of ferritic/austenitic (duplex) stainless steels

Petroleum, petrochemical and natural gas industries — Test methods for quality control of microstructure of ferritic/austenitic (duplex) stainless steels

ISO 17781:2017 specifies quality control testing methods and test conditions for the characterization of microstructure in relation to relevant properties in ferritic/austenitic (duplex) stainless steel components supplied in the solution annealed condition and fabrication welds in the as welded condition. ISO 17781:2017 supplements the relevant product and fabrication standards with respect to destructive testing methods including sampling of test specimens, test conditions and test acceptance criteria to show freedom from deleterious intermetallic phases and precipitates in duplex stainless steels. In addition, this document specifies the documentation of testing and test results by the testing laboratory. NOTE 1 This document is based upon experience with duplex stainless steels in offshore oil and gas industry applications including topside and subsea hydrocarbon service, sea water service, as well as structural use. NOTE 2 The austenite spacing is relevant to the susceptibility of duplex stainless steels to hydrogen-induced stress cracking (HISC) in subsea applications where cathodic protection is applied. This falls outside the scope of this document. Reference is made to DNV/GL RP-F112[4].

Industries du pétrole, de la pétrochimie et du gaz naturel — Méthodes d'essai pour le contrôle de la qualité de la microstructure des aciers inoxydables austénitiques/ferritiques (duplex)

ISO 17781:2017 spécifie les méthodes et les conditions d'essai de contrôle de la qualité pour caractériser la microstructure par rapport aux propriétés pertinentes des composants en acier inoxydable ferritique/austénitique (duplex) fournis à l'état recuit et les soudures de fabrication à l'état brut de soudage. ISO 17781:2017 complète les normes de fabrication du produit concerné par rapport aux méthodes d'essais destructifs, y compris le prélèvement des éprouvettes, les conditions d'essai et les critères d'acceptation des essais, pour démontrer l'absence de phases intermétalliques préjudiciables et de précipités dans les aciers inoxydables duplex. De plus, le présent document précise la documentation des essais et des résultats des essais par le laboratoire d'essai. NOTE 1 Le présent document se fonde sur l'expérience acquise avec des aciers inoxydables duplex dans des applications de plates-formes d'extraction en mer de pétrole et de gaz, y compris dans le cadre d'un fonctionnement en milieu hydrocarbure sous-marin ou en surface ou en service dans l'eau de mer ou pour une utilisation structurelle. NOTE 2 L'espacement austénitique est pertinent pour la sensibilité des aciers inoxydables duplex à la fissuration par contrainte induite par l'hydrogène (HISC) dans les applications sous-marines en présence d'une protection cathodique. Cela ne relève pas du domaine d'application du présent document. Cela relève du domaine d'application du DNV/GL RP-F112[4].

General Information

Status
Published
Publication Date
23-Jul-2017
ICS
75.180.01 - Equipment for petroleum and natural gas industries in general
Technical Committee
ISO/TC 67 - Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries
Drafting Committee
ISO/TC 67/WG 8 - Materials, corrosion control, welding and jointing, and non-destructive examination (NDE)
Current Stage
9093 - International Standard confirmed
Completion Date
01-Nov-2023
Ref Project

Relations

Consolidates
ISO 9393-2:2005 - Thermoplastics valves for industrial applications — Pressure test methods and requirements — Part 2: Test conditions and basic requirements
Effective Date
06-Jun-2022

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ISO 17781:2017 - Petroleum, petrochemical and natural gas industries -- Test methods for quality control of microstructure of ferritic/austenitic (duplex) stainless steelsISO 17781:2017 - Petroleum, petrochemical and natural gas industries -- Test methods for quality control of microstructure of ferritic/austenitic (duplex) stainless steels
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ISO 17781:2017 - Industries du pétrole, de la pétrochimie et du gaz naturel -- Méthodes d'essai pour le contrôle de la qualité de la microstructure des aciers inoxydables austénitiques/ferritiques (duplex)ISO 17781:2017 - Industries du pétrole, de la pétrochimie et du gaz naturel -- Méthodes d'essai pour le contrôle de la qualité de la microstructure des aciers inoxydables austénitiques/ferritiques (duplex)
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ISO 17781:2017 - Industries du pétrole, de la pétrochimie et du gaz naturel -- Méthodes d'essai pour le contrôle de la qualité de la microstructure des aciers inoxydables austénitiques/ferritiques (duplex)
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Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 17781
First edition
2017-07
Petroleum, petrochemical and
natural gas industries — Test
methods for quality control of
microstructure of ferritic/austenitic
(duplex) stainless steels
Industries du pétrole, de la pétrochimie et du gaz naturel — Méthodes
d’essai de contrôle de la qualité de la microstructure des aciers
inoxydables (duplex) austénitiques/ferritiques
Reference number
ISO 17781:2017(E)
©
ISO 2017

---------------------- Page: 1 ----------------------
ISO 17781:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 17781:2017(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 2
3.1 Terms and definitions . 2
3.2 Abbreviated terms . 3
4 Sampling of test specimens . 4
4.1 General . 4
4.2 Casting test blocks. 6
4.3 Welds in the as welded condition . 6
5 Test methods . 7
5.1 General . 7
5.2 Microstructural examination . 7
5.2.1 General. 7
5.2.2 Preparation of specimen . 7
5.2.3 Etching of specimens . . 7
5.2.4 Microstructural evaluation of test specimens . 8
5.3 Ferrite content measurement .
...

NORME ISO
INTERNATIONALE 17781
Première édition
2017-07
Industries du pétrole, de la
pétrochimie et du gaz naturel —
Méthodes d'essai pour le contrôle de
la qualité de la microstructure des
aciers inoxydables austénitiques/
ferritiques (duplex)
Petroleum, petrochemical and natural gas industries — Test methods
for quality control of microstructure of ferritic/austenitic (duplex)
stainless steels
Numéro de référence
ISO 17781:2017(F)
©
ISO 2017

---------------------- Page: 1 ----------------------
ISO 17781:2017(F)

DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2017, Publié en Suisse
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée
sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie, l’affichage sur
l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation peuvent être adressées à l’ISO à
l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – Tous droits réservés

---------------------- Page: 2 ----------------------
ISO 17781:2017(F)

Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes, définitions et abréviations . 2
3.1 Termes et définitions . 2
3.2 Abréviations . 3
4 Prélèvement des éprouvettes . 4
4.1 Généralités . 4
4.2 Blocs d’essai de pièces moulées . 5
4.3 Soudures à l’état brut de soudage . 6
5 Méthodes d’essai . 7
5.1 Généralités . 7
5.2 Examen de la microstructure . 7
5.2.1 Généralités . 7
5.2.2 Préparation de l’éprouvette . 7
5.2.3 Attaque chimique des éprouvettes . 7
5.2.4 Examen de la microstructure des éprouvettes . 8
5.3 Mesure de la teneur en ferrite .
...

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