Action taken to categorize a length of new OCTG based on conformance with the contracted inspection requirements.

Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards



A service provided by Classification Societies which establishes and administers standards, known as Rules, for the design, construction and periodic survey of merchant ships and other marine and offshore structures.

Classification certifies adherence to these Rules, and means that a vessel possesses the structural and mechanical fitness required for its intended service.

Source: International Association of Drilling Contractors, Appendix 2 to Health, Safety and Environment Case Guidelines for Offshore Drilling Contractors, Issue 3.3.2, February 2010. IADC Guidelines



A service which comprises the development of independent technical standards for vessels – class rules and standards, and to verify compliance with the rules and standards throughout the vessels’ life.

Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards

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