BS EN ISO 15156-2:2015 gives 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 H2S-containing environments, whose failure can pose a risk to the health and safety of the public and personnel or to the environment. It can be applied to help to avoid costly corrosion damage to the equipment itself. It supplements, but does not replace, the materials requirements of the appropriate design codes, standards or regulations.

This part of ISO 15156 addresses the resistance of these steels to damage that can be caused by sulfide stress-cracking (SSC) and the related phenomena of stress-oriented hydrogen-induced cracking (SOHIC) and soft-zone cracking (SZC).

This part of ISO 15156 also addresses the resistance of these steels to hydrogen-induced cracking (HIC) and its possible development into stepwise cracking (SWC).

This part of ISO 15156 is concerned only with cracking. Loss of material by general (mass loss) or localized corrosion is not addressed.

Table 1 provides a non-exhaustive list of equipment to which this part of ISO 15156 is applicable, including permitted exclusions.

This part of ISO 15156 applies to the qualification and selection of materials for equipment designed and constructed using load controlled design methods. For design utilizing strain-based design methods, see ISO 15156-1:2015, Clause 5.

Annex A lists SSC-resistant carbon and low alloy steels, and A.2.4 includes requirements for the use of cast irons.

This part of ISO 15156 is not necessarily suitable for application to equipment used in refining or downstream processes and equipment.


Cross References:
ISO 6506-1
ISO 6507-1
ISO 6508-1
ISO 6892-1
ISO 10423
ISO 15156-1:2015
ISO 15156-3:2015
NACE TM0177
NACE TM0284
SAE AMS-2430
ISO 3183
ISO 11960
ISO 18265
Spec API 5CT
ANSI/API Spec 5L/ISO 3183
ASTM A48/A 48M
ASTM A53/A 53M
ASTM A105/A 105M
ASTM A106
ASTM A193/A193M
ASTM A194/A194M
ASTM A220/A220M
ASTM A234/A234M
ASTM A278/A278M
ASTM A320/A320M
ASTM A333/A333M
ASTM A381
ASTM A395/A395M
ASTM A524
ASTM A536
ASTM A571/A571M
ASTM A602
ASTM E140
HSE OTI-95-635
NACE 2000
NACE MR0176
NACE MR0175
ASTM E10
ASTM E18
ASTM E384


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