Pipeline on bottom stability is an interaction of pipe, water and soil. These tools provide the design engineer with a rational approach for weight coating design, which he can use with confidence because the tools have been developed based on full scale and near full scale model tests. These tools represent the state-of-the-art in stability design and model the complex behavior of pipes subjected to both wave and current loads. These include; hydrodynamic forces which account for the effect of the wake (generated by flow over the pipe) washing back and forth over the pipe in oscillatory flow; and, the embedment (digging) which occurs as a pipe resting on the seabed is exposed to oscillatory loadings and small oscillatory deflections.




It features calculation of kinematics from 3-D irregular waves, several hydrodynamic force models, models for partial burial, non-linear, time dependent interaction between pipeline and soil (sand and clay) and non-linear pipeline material properties (for boundary elements). This allows for detailed analysis of specific pipeline sections subjected to specified environmental conditions. It consists of three (3) levels with Level 1 being used for quick simplified analysis, Level 2 for comprehensive detailed deign and modeling (most used) and Level 3 for advanced and very complex sub-sea pipeline design modeling.