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Note: This document was originally published with errors in Table A.16, page 3-32. These identified errors are corrected. Errata sheet is included.
NACE MR0175/ISO 15156 gives requirements and recommendations for the selection and qualification of carbon and low-alloy steels, corrosion-resistant alloys, and other alloys for service in equipment used in oil and natural gas production and natural gas treatment plants in H2S-containing environments, whose failure could pose a risk to the health and safety of the public and personnel or to the equipment itself.
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Petroleum and natural gas industries — Materials for use in H2S-containing environments in oil and gas production —
Part 1: General principles for selection of cracking-resistant materials
TECHNICAL CIRCULAR 1
Published 2021-12-09
Part 2: Cracking-resistant carbon and low-alloy steels, and the use of cast irons
TECHNICAL CIRCULAR 2
Ref. No. ISO 15156-2:2020/Cir.2:2022(E)
Part 3: Cracking-resistant CRAs (corrosion-resistant alloys) and other alloys
Ref. No. ISO 15156-3:2020/Cir.2:2022(E)
In the oil and gas industry, the major standard for material selection today is ANSI1/NACE2 MR0175/ISO 15156 Parts 1-3. [1] While this standard deals extensively with environment cracking and its prevention for materials under exposure to production environments containing H2S, CO2, chlorides, and sulfur, it does not include any guidance or material requirements for resistance to environmental cracking (such as hydrogen stress cracking – HSC, or otherwise) under variable subsea conditions that involve exposure to seawater with varying levels of cathodic protection (CP). ISO 21457 [2] provides further guidance for materials selection and corrosion control for oil and gas production systems but does not provide adequate coverage of the issue of environmental cracking in subsea applications with CP.
DOWNLOADABLE HISTORICAL DOCUMENT. This NACE standard (material requirements) is one step in a series of committee studies, reports, symposia, and standards that have been sponsored by Group Committee T-1 (Corrosion Control in Petroleum Production) relating to the general problem of sulfide stress cracking (SSC) of metals. Much of this work has been directed toward the oil and gas production industry. Many of the guidelines and specific requirements in this standard are based on field experience with the materials listed, as used in specific components, and may be applicable to other components and equipment in the oil production industry or to other industries. Users of this standard must be cautious in extrapolating the content of this standard for use beyond its scope.