DNV GL INDUSTRIAL SERVICES IV-6-1 PDF

Scope of Classification

New Constructions

Classification covers the mobile offshore unit's or the fixed offshore installation's hull/structure and machinery including electrical installations as well as special equipment and installations as far as agreed in the building specification between the prospective owner and the building yard. Classification aims primarily at ensuring reliability of the hull/structure and machinery systems on board, resulting in an adequate level of safety of personnel and environmental protection. However, Classification is not intended to ensure the effectiveness of the intended use on purpose.

Hull/structures, machinery and equipment determining the type of mobile offshore unit or fixed offshore installation are subject to examination within the scope of Classification, in accordance with the Character of Classification and affixed Class Notations. Other systems and components may be included in the Classification and/or Certification procedure upon request of the prospective mobile offshore unit's Owner or the fixed offshore installation's Owner, the building yard or other subcontractors.

Upon completion of construction and trials, the Class Certificate(s) will be issued and will be kept on board, unless another location is agreed. The Certificates have a defined period of validity (Class Period), and may be renewed after prescribed thorough surveys, see Sections 3 and 5.

Existing mobile offshore units or fixed offshore installations

Consent may be given for existing mobile offshore units or fixed offshore installations, not built under GL's supervision, to be classified and subjected to the corresponding inspection routine. In such a case, an initial investigation will be performed, normally comprising the review of existing design documents and service records, a thorough onsite survey of the mobile offshore unit, or fixed offshore installation, including investigation of the underwater hull/structure and foundations, verifications by measurement where necessary, and tests/trials of equipment and machinery as far as agreed and/or essential for safety, see also G.2.