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API RP 1111 Document Information:
Title
Design, Construction, Operation, and Maintenance of Offshore Hydrocarbon Pipelines (Limit State Design)
American Petroleum Institute
Publication Date:
Jul 1, 1999
Scope:
1 Scope
1.1 This recommended practice (RP) sets out 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.
1.2 The practice 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.
1.3 Limit State Design has been incorporated into this RP to provide a uniform factor of safety with respect to rupture or burst failure as the primary design condition independent of the pipe diameter, wall thickness, and grade. Background on theory and practice of limit states for pressure containing cylinders may be found in Hill and in Crossland and Jones, as listed in section 3, Referenced Publications. Burst design criteria within this practice are presently defined for carbon steel line pipe. Application of the proposed design criteria to other materials requires determination by the user of the minimum burst criteria using the procedure set forth in Appendix A.
1.4 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.
1.5 Design and construction practices other than those set forth in sections 4 and 7 may be employed when supported by adequate technical justification, including model or proof testing of involved components or procedures as appropriate. Nothing in this RP should be considered as a fixed rule for application without regard to sound engineering judgment.
Note: Certain governmental requirements or company specifications may differ from the criteria set forth in this RP, and this RP does not supersede or override those differing requirements or specifications.
1.6 This publication has incorporated by reference all or parts of several existing codes, standards, and RPs that have been found acceptable for application to offshore hydrocarbon pipelines.
CAUTION: Users must refer to the most recent editions of all documents incorporated by reference. In references to any specific part of ASME B31.4 or ASME B31.8, the part is identified by its name (such as Chapter VII) in the 1992 edition of ASME B31.4 and the 1995 edition of ASME B31.8. However, the reference is meant to be to the corresponding part in the latest revision or edition of the publication.
1.7 For a graphic representation of the scope of this RP, see Figure 1.
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