1 Scope
This document gives requirements and recommendations for the selection and qualification
of CRAs (corrosion-resistant alloys) and other alloys 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 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 document addresses the resistance of these materials to damage that can be caused
by sulfide stress cracking (SSC), stress corrosion cracking (SCC), and galvanically induced hydrogen stress cracking (GHSC).
This document 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 document is applicable,
including exclusions.
This document 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 15156‑1:2020, Clause 5.
This document is not necessarily suitable for application to equipment used in refining
or downstream processes and equipment.
Table 1
—
List of equipment
| This document is applicable to materials used for the following equipment |
Exclusions |
|---|---|
| Drilling, well construction, and well-servicing equipment |
Equipment exposed only to drilling fluids of controlled compositiona Drill bits
Blowout-preventer (BOP) shear bladesb
Drilling riser systems
Work strings
Wireline and wireline equipmentc
Surface and intermediate casing
|
| Wells including subsurface equipment, gas lift equipment, wellheads, and christmas trees |
Sucker rod pumps and sucker rodsd Electric submersible pumps
Other artificial lift equipment
Slips
|
| Flow-lines, gathering lines, field facilities, and field processing plants |
Crude oil storage and handling facilities operating at a total absolute pressure below 0,45 MPa (65 psi) |
| Water-handling equipment | Water-handling facilities operating at a total absolute pressure below 0,45 MPa (65 psi) Water injection and water disposal equipment
|
| Natural gas treatment plants | — |
| Transportation pipelines for liquids, gases, and multi-phase fluids |
Lines handling gas prepared for general commercial and domestic use |
| For all equipment above | Components loaded only in compression |