EN ISO 15156-3:2015

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Factors affecting the cracking-resistance of CRAs
  and other alloys in H[2]S-containing environments
6 Qualification and selection of CRAs and other
  alloys with respect to SSC, SCC, and GHSC in
  H[2]S-containing environments
7 Purchasing information and marking
Annex A (normative) - Environmental cracking-resistant
        CRAs and other alloys (including Table A.1 - Guidance
        on the use of the materials selection tables)
Annex B (normative) - Qualification of CRAs for
        H[2]S-service by laboratory testing
Annex C (informative) - Information that should be
        supplied for material purchasing
Annex D (informative) - Materials chemical compositions
        and other information
Annex E (informative) - Nominated sets of test conditions
Bibliography

ISO 15156-3:2015 gives requirements and recommendations for the selection and qualification of CRAs (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 can pose a risk to the health and safety of the public and personnel or to the environment. It can be applied to help 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.ISO 15156-3:2015 addresses the resistance of these materials to damage that can be caused by sulfide stress-cracking (SSC), stress-corrosion cracking (SCC), and galvanically induced hydrogen stress cracking (GHSC).ISO 15156-3:2015 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 part of ISO 15156 is applicable, including permitted exclusions.ISO 15156-3:2015 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 15156‑1:2015, Clause 5.ISO 15156-3:2015 is not necessarily suitable for application to equipment used in refining or downstream processes and equipment.