Foreword These Rules contain the technical requirements and criteria employed by ABS in the review and survey of hydrocarbon production facilities that are being considered for Classification and for maintenance of Classification. It is applicable to Hydrocarbon Production and Processing Systems and associated utility and safety systems located on fixed (bottom-founded) offshore structures of various types. It also applies to systems installed on floating installations such as ships shape based FPSOs@ tension leg platforms@ spars@ semisubmersibles@ etc. There are differences in the practices adopted by the designers of fixed and floating installations. Some of these differences are due to physical limitations inherent in the construction of facilities on new or converted floating installations. Recognizing these differences@ the requirements for facilities on fixed and floating installations are specified in separate chapters. Chapter 3 covers requirements for facilities on floating installations and Chapter 4 covers requirements for facilities on fixed installations. Facilities designed@ constructed@ and installed in accordance with the requirements of these Rules on an ABS classed fixed or floating offshore structure@ under ABS review and survey@ will be classed and identified in the Record by an appropriate classification notation as defined herein. These Rules have been written for world-wide application and as such@ compliance with individual requirements may require comprehensive data@ analyses and plans to be submitted to demonstrate the adequacy of the facility. ABS acknowledges that there is a wide range of documents that may be required for submittal to satisfy these Rules. It is not the intention of these Rules to impose requirements or practices in addition to those that have previously proven satisfactory in similar situations. Design and installation requirements presented in these Rules are based on existing methodologies and attendant safety factors that are deemed to provide an adequate level of safety. Primarily@ the use of such methods and limits in these Rules reflects what is considered to be the current state of practice in the design and installation of offshore facilities. The application of these Rules by ABS will not seek to inhibit the use of any technological approach that can be shown to produce an acceptable level of safety. These Rules are applicable to the classification of facilities for which applications@ or contracts for classification@ are received on or after 1 January 2018