API RP 2RIM-2019 pdf free download

API RP 2RIM-2019 pdf free download..Integrity Management of Risers from Floating Production Systems.
1 Scope This recommended practice (RP) provides guidance for the integrity management (IM) of risers connected to a permanent floating production system (FPS) used for the drilling, development, production, and storage of hydrocarbons in offshore areas. A riser is typically part of a larger subsea system extending from a wellhead, tree, manifold, template, or other structure on the seabed, to a boarding valve or pig trap on the host platform’s topsides. This RP addresses the integrity management of the dynamic portion of the riser system. For the purposes of this RP, a riser has a top boundary that is somewhere at or above the point where it transfers load to the platform structure, and it has a lower boundary where it transfers load into a foundation, which could be a wellhead, pipeline, or subsea structure. For a top-tensioned riser (TTR), the top boundary would typically be the tensioner system hang-off point, and the bottom boundary would be the wellhead. For a steel catenary riser (SCR), the top boundary would typically be the stress joint or flexible joint. Some unusual configurations such as pull-tube SCRs merit special consideration. The top boundaries of a flexible or hybrid riser are typically a flanged connection to the riser end fitting at the top of an I-tube or J-tube, and a bend stiffener at the bottom of a I-tube or J-tube. The IM of the structural support for a riser on the host platform is in the scope of API 2FSIM, although some hybrid configurations, such as pull tubes, can require overlapping riser and structural IM. For risers structurally connected to the platform below the topsides, hull piping can be structurally clamped to the hull up to a boarding valve or pig launcher at the topsides. This is intended to be considered as part of the riser in terms of IM, although it also has structural elements addressed in API 2FSIM. The scope of this RP includes: — structural components of the riser; 2 Normative References This document contains no normative references. For a list of documents and other publications associated with API 2RIM, see the Bibliography. 3 Terms, Definitions, and Abbreviations For the purposes of this document, the following terms and definitions apply. 3.1 Terms and Definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 anomaly An observation or finding indicating the possibility that a certain parameter could be outside an acceptable design or performance threshold. 3.1.2 assessment A technical review process triggered by an assessment initiator (as identified during an evaluation) to demonstrate that a system or structure is fit-for-service or to determine the need for risk reduction. 3.1.3 assessment initiators Changes in riser condition or operating experience, such as storms, which require an existing riser to undergo an assessment to demonstrate fitness-for-service. 3.1.4 buoyancy module A buoyant device secured to a riser to provide supplemental buoyancy. NOTE Such devices are most commonly constructed from syntactic foam but can also have other structural forms. 3.1.5 catenary riser A riser that is suspended in a catenary shape from near-vertical at the host platform to horizontal on the seabed after the touch-down point, typically constructed from steel line pipe or flexible pipe. NOTE Supplemental buoyancy can be attached to portions of its length in some instances, forming a “wave” in the riser shape. 3.1.6 condition assessment The process of gathering information on a riser’s present condition to perform a fitness-for-service assessment.