Det Norske Veritas - Germanischer Lloyd

DNVGL  Recommendation for selecting standards for structural steel materials (tentative recommended practice)
 N DNVGL-RP-B201

Annotation

This RP enables efficient and economical selection of materials independent of the location of shipyards and suppliers during concept, engineering and construction phases. The RP is based on API, ASTM, DNVGL, EN, JIS and NORSOK. These standards are widely used for offshore projects.

The requirements and classification of standards were grouped by parameters such as strength and quality level. There are different requirements with regards to material properties for different material grades in the different standards applied such as API, ASTM, DNVGL, EN, JIS and NORSOK. This main purpose of this RP is to address those differences in requirements between the standards. Pre-qualification requirements were developed separately as presented in Sec.4. Pre-qualification requirements are common for plates, sections and tubular items.

The following items are covered by this RP:

— Special, primary and secondary plates

— Primary, secondary and tertiary sections (H-beam, angle, channel, bars)

— Primary, secondary and tertiary tubular (seamless or welded).

Applicability

This RP covers offshore oil and gas projects involving topsides equipment on any type of production installation, fixed or floating, or drilling unit. The RP should not be applied for systems covered by class rules. No geographical limitations apply.

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