NACE MR0175/ISO 15156-2:2003(E)
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Contents Page
Foreword............................................................................................................................................................iv
Introduction ........................................................................................................................................................v
1 Scope...................................................................................................................................................... 1
2 Normative references ........................................................................................................................... 2
3 Terms and definitions........................................................................................................................... 3
4 Symbols and abbreviated terms.......................................................................................................... 6
5 Purchasing information........................................................................................................................ 7
6 Factors affecting the behaviour of carbon and low alloy steels in H
2
S-containing
environments.........................................................................................................................................7
7 Qualification and selection of carbon and low alloy steels with resistance to SSC, SOHIC and
SZC .........................................................................................................................................................8
7.1 Option 1: Selection of SSC-resistant steels (and cast irons) using A.2.......................................... 8
7.2 Option 2: Selection of steels for specific sour service applications or for ranges of sour
service.................................................................................................................................................... 8
7.3 Hardness requirements...................................................................................................................... 10
7.4 Other fabrication methods ................................................................................................................. 16
8 Evaluation of carbon and low alloy steels for their resistance to HIC/SWC................................. 16
9 Marking................................................................................................................................................. 16
Annex A (normative) SSC-resistant carbon and low alloy steels (and requirements and
recommendations for the use of cast irons).................................................................................... 17
Annex B (normative) Qualification of carbon and low alloy steels for H
2
S service by laboratory
testing................................................................................................................................................... 26
Annex C (informative) Determination of H
2
S partial pressure ..................................................................... 34
Annex D (informative) Recommendations for determining pH....................................................................36
Annex E (informative) Information to be supplied for material purchasing ............................................... 41
Bibliography .....................................................................................................................................................43