NF EN ISO 15156-2 : 2011

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

Specifies 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 could pose a risk to the health and safety of the public and personnel or to the environment.