01/714323 DC : DRAFT OCT 2001

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Information to be supplied for material purchase
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 respect to SSC, SOHIC and SZC
  7.1 Option 1: Qualification and selection of steels
      with SSC resistance to any sour service
      7.1.1 For P[H[2]S] < 3,5 mbar (0,05 psi)
      7.1.2 For P[H[2]S] < 3,5 mbar (0,05 psi)
  7.2 Option 2: Qualification and selection of steels for
      specific or restricted ranges of sour service
      application
      7.2.1 Sulfide stress cracking (SSC)
      7.2.2 Stress oriented hydrogen induced cracking (SOHIC)
            and soft zone cracking (SZC)
  7.3 Hardness requirements
8 Evaluation of carbon and low alloy steels for their resistance
  to hydrogen induced cracking/stepwise cracking (HIC/SWC)
9 Marking
Annex A (normative) SSC resistant carbon and low alloy steels
        (with requirements and recommendations for the use of
        cast irons)
        A.1 General
        A.2 SSC resistant steels for any sour service
            A.2.1 General requirements
            A.2.2 Application to Product Forms
            A.2.3 Application to equipment
            A.2.4 Requirements and recommendations for the use
                  of cast irons
        A.3 SSC resistant steels for use throughout SSC region 1
            A.3.1 General
            A.3.2 Casing and tubing
            A.3.3 Pipeline steels
        A.4 SSC resistant steels for use throughout SSC region 2
            A.4.1 General
            A.4.2 Casing and tubing
            A.4.3 Pipeline steels
Annex B (normative) Qualification of carbon and low alloy steels
        for H[2]S service by laboratory testing
        B.1 Minimum requirements
        B.2 Uses of laboratory qualifications
            B.2.1 Qualification of manufactured products
            B.2.2 Qualification of a manufacturing source and route
            B.2.3 Use of laboratory testing as a basis for
                  proposing additions and changes to Annex A
        B.3 Sulfide stress cracking
        B.4 Test procedures to evaluate the resistance of carbon
            and low alloy steels to SOHIC and SZC
            B.4.1 Small scale tests
            B.4.2 Full pipe ring tests
        B.5 Test procedures and acceptance criteria to evaluate
            the resistance of carbon and low alloy steels to
            HIC/SWC
Annex C (informative) Determination of H[2]S partial pressure
        C.1 Calculation of partial pressure of H[2]S for
            systems with a gas phase
        C.2 Calculation of effective H[S]S partial pressure
            for gas free liquid systems
Annex D (informative) Recommendations for the determination
        of pH
        D.1 General
Annex E (informative) Information to be supplied for material
        purchase
Bibliography

EN ISO 15156-2