NEN EN ISO 15156-2 : 2015

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 H[2]S-containing environments
7 Qualification and selection of carbon and low alloy
  steels with resistance to SSC, SOHIC and SZC
  7.1 Option 1: Selection of SSC-resistant steels
      (and cast irons) using A.2
  7.2 Option 2: Selection of steels for specific sour
      service applications or for ranges of sour service
  7.3 Hardness requirements
  7.4 Other fabrication methods
8 Evaluation of carbon and low alloy steels for their
  resistance to HIC/SWC
9 Marking
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 H[2]S service by laboratory testing
Annex C (informative) Determination of H[2]S partial pressure
Annex D (informative) Recommendations for determining pH
Annex E (informative) Information to be supplied for
        material purchasing
Bibliography

Provides 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 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.