NEN 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
  6.1 General
  6.2 Evaluation of materials properties
  6.3 PREN
7 Purchasing information and marking
  7.1 Information to be supplied for material purchasing
  7.2 Marking
Annex A (normative) Environmental cracking-resistant CRAs
        and other alloys
Annex B (normative) Qualification of CRAs for H[2]S-service
        by laboratory testing
Annex C (informative) Information to be supplied for material
        purchasing
Annex D (informative) Materials chemical compositions and other
        information
Annex E (informative) Nominated sets of test conditions
Bibliography

Provides 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 H[2]S-containing environments whose failure can pose a risk to the health and safety of the public and personnel or to the environment.