API RP 1111-2015 pdf free download

API RP 1111-2015 pdf free download.Design, Construction, Operation, and Maintenance of Offshore Hydrocarbon Pipelines (Limit State Design).
1 Scope This recommended practice (RP) sets criteria for the design, construction, testing, operation, and maintenance of offshore steel pipelines utilized in the production, production support, or transportation of hydrocarbons; that is, the movement by pipeline of hydrocarbon liquids, gases, and mixtures of these hydrocarbons with water. This RP may also be utilized for water injection pipelines offshore. The RP also applies to any transportation piping facilities located on a production platform downstream of separation and treatment facilities, including meter facilities, gas compression facilities, liquid pumps, associated piping, and appurtenances. The design, construction, inspection, and testing provisions of this RP may not apply to offshore hydrocarbon pipelines designed or installed before this latest revision of the RP was issued. The operation and maintenance provisions of this RP are suitable for application to existing facilities. For a graphic representation of the scope of this RP, see Figure 1. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. API Recommended Practice 2A-WSD, Planning, Designing, and Constructing Fixed Offshore Platforms—Working Stress Design API Standard 2RD, Dynamic Risers for Floating Production Systems API Specification 5L, Specification for Line Pipe API Recommended Practice 5L1, Recommended Practice for Railroad Transportation of Line Pipe API Specification 6A, Specification for Wellhead and Christmas Tree Equipment API Specification 6D, Specification for Pipeline and Piping Valves API Recommended Practice 14C, Recommended Practice for Analysis, Design, Installation, and Testing of Basic Surface Safety Systems for Offshore Production Platforms
3 Terms, Definitions, Acronyms, Abbreviations, and Symbols 3.1 Terms and Definitions For the purposes of this document, the following definitions apply. 3.1.1 design pressure Maximum difference, at each cross section, between internal pressure and external pressure during operating conditions. NOTE Section 4.3.1 sets limits on design pressure. 3.1.2 extreme loads Loads that are unlikely to be exceeded during the lifetime of the pipeline. 3.1.3 gas Hydrocarbon in a vapor phase. 3.1.4 limit state design Condition of a structure such as a pipeline, beyond which it no longer fulfills the relevant design criteria NOTE The condition may refer to a degree of loading or other actions on the structure, while the criteria refer to structural integrity, fitness for use, durability or other design requirements. 3.1.5 non-shielded coating Coating system with a failure mode (loss of adhesion etc.) that does not prevent distribution of cathodic protection current to the metal substrate 3.1.6 offshore Area seaward of the established coastline that is in direct contact with the open sea, and seaward of the line marking the seaward limit of inland coastal waters.
3.1.7 offshore pipeline riser Vertical or near-vertical portion of an offshore pipeline between the platform piping and the pipeline at or above the seabed, differentiated from a pipeline to provide additional personnel safety factor for third-party damage, dropped objects, etc. NOTE For purposes of internal pressure design, the “pipeline riser” design factor applies to the riser pipe within an appropriate horizontal distance from the surface facility, and the “pipeline” design factor applies beyond that point. a) A minimum horizontal offset distance of 300 ft for use of the pipeline riser design factor is recommended for deepwater suspended risers (e.g. SCRs). Offset begins at the hang-off point of the riser. b) For shallow-water fixed platforms, the entire riser attached to the facility typically employs the “pipeline riser” design factor. Pipeline on the seabed connecting to a shallow-water fixed platform riser typically employs the pipeline riser design factor for a horizontal offset distance of 300 ft. 3.1.8 oil Hydrocarbon in liquid phase. 3.1.9 operational loads Loads that may occur during normal operation of the pipeline. 3.1.10 pipeline Piping that transports fluids between offshore production facilities or between a platform and a shore facility, often sub-classified into the three categories: flowlines, injection lines, and export lines. NOTE The use of the word pipeline in this RP applies to all three categories defined below, unless otherwise specifically noted in the RP. a) Export Line—A pipeline that transports processed oil and/or gas fluids between platforms or between a platform and a shore facility. b) Flowline—A pipeline that transports the well fluids from the wellhead to the first downstream process component. Flowlines covered by this RP originate at a subsea wellhead, subsea manifold, or a remote wellhead platform. Flowlines that are confined to a single platform are not covered by this RP (see API 14E).