Standard: NACE - MR0175/ISO 15156-2

PETROLEUM AND NATURAL GAS INDUSTRIES — MATERIALS FOR USE IN H2S-CONTAINING ENVIRONMENTS IN OIL AND GAS PRODUCTION — PART 2: CRACKING-RESISTANT CARBON AND LOW-ALLOY STEELS, AND THE USE OF CAST IRONS

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Scope:

This part of ANSI/NACE MR0175/ISO 15156 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 ANSI/NACE MR0175/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 ANSI/NACE MR0175/ISO 15156 also addresses the resistance of these steels to hydrogeninduced cracking (HIC) and its possible development into stepwise cracking (SWC).

This part of ANSI/NACE MR0175/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 ANSI/NACE MR0175/ISO 15156 is applicable, including permitted exclusions.

This part of ANSI/NACE MR0175/ISO 15156 applies to the qualification and selection of materials for equipment designed and constructed using conventional elastic design criteria. For designs utilizing plastic criteria (e.g. strain-based and limit-state designs), see ANSI/NACE MR0175/ISO 15156-1:2009, 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 ANSI/NACE MR0175/ISO 15156 is not necessarily suitable for application to equipment used in refining or downstream processes and equipment.

Organization: NACE International
Document Number: mr0175/iso 15156-2
Publish Date: 2009-10-15
Page Count: 6
Change Type: STCH
Available Languages: EN
DOD Adopted: NO
ANSI Approved: YES
Most Recent Revision: YES
Current Version: YES
Status: Inactive

Document History

Document # Change Type Update Date Revision Status
MR0175/ISO 15156-2 CIR 1 Change Type: Update Date: 2007-12-15 Status: INAC
MR0175/ISO 15156-2 CORR 1 Change Type: Update Date: 2005-09-01 Status: INAC

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