I.S. EN ISO 15156-2:2020

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Purchasing information
6 Factors affecting the behaviour of carbon and low alloy steels in H2S-containing environments
7 Qualification and selection of carbon and low-alloy steels with resistance to SSC, SOHIC and SZC
8 Evaluation of carbon and low alloy steels for their resistance to HIC/SWC
9 Marking, labelling, and documentation
Annex A (normative) SSC-resistant carbon and low alloy steels (and requirements and recommendations for the use of cast irons)
Annex B (normative) Qualification of carbon and low-alloy steels for H2S service by laboratory testing
Annex C (informative) Determination of H2S partial pressure and use of alternative parameters
Annex D (informative) Recommendations for determining pH
Annex E (informative) Information that should be supplied for material purchasing
Bibliography

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.