This standard is a materials requirement for metals used in oil and gas service exposed to sour gas, to be used by oil and gas companies, manufacturers, engineers, and purchasing agents. Many of the guidelines and specific requirements in this standard are based on field experience with the materials listed, as used in specific components, and may be applicable to other components and equipment in the oil-production industry or to other industries, as determined by the user. Users of this standard must be cautious in extrapolating the content of this standard for use beyond its scope.
This standard presents metallic material requirements to provide resistance to sulfide stress cracking (SSC) and/or stress corrosion cracking (SCC) for petroleum production, drilling, gathering and flow line equipment, and field processing facilities to be used in hydrogen sulfide (H2S)bearing hydrocarbon service.
This standard is applicable to the materials and/or equipment specified by the materials standards institutions listed in Table 1 (or by equivalent standards or specifications of other agencies).
This standard does not include and is not intended to include design specifications.
Other forms of corrosion and other modes of failure, although outside the scope of this standard, should also be considered in design and operation of equipment. Severely corrosive conditions may lead to failures by mechanisms other than SSC and/or sec and should be mitigated by corrosion inhibition or materials selection, which are outside the scope of this standard. For example, some lower strength steels used for pipelines and vessels may be subjected to failure by hydrogen-induced cracking (blistering and stepwise cracking) as a result of hydrogen damage associated with general corrosion in the presence of H2S. Historical document 2003