Analysis of wall thickness calculation for rigid pipeline by using carbon steel for offshore

This project presents an analysis of pipeline on existing field by calculating new wall thickness and choose best material grade of Carbon Steel selection using Mathcad software. Offshore pipeline wall thickness is discussed by checking the wall thickness against few design criteria such as pressure containment due to hoop stress, buckle initiation, buckle propagation and collapse pressure due to external pressure based on preferred standard such as API 5L Specification and ASME B31.8 as the pipeline is transporting a natural gas. These project encompass the majority issues regarding offshore pipeline design which may serve as reference and guide to the offshore pipeline engineer during the design process. Also, to check whether the new proposed wall thickness and material grade selection can really increase the productivity and design life of the pipeline than previously. Lastly, to use thinner pipe wall thickness with better strength of weldability and great capabilities even at slightly higher cost.