Wye piece verification

Jee has performed a number of verification studies to provide fit-for-purpose analyses on pipeline wye pieces, applicable to ASME B16.5 generic class 600 to class 1500 pipeline systems.

These included

• Developing three dimensional solid models of the subsea pipeline wye pieces using the finite element analysis package ABAQUS
• Applying factory acceptance test, hydrotest and operational pressures and bending moments
• Determining the stresses within the subsea wye pieces
• Fit-for-purpose analysis on critical welds
• Analysis of the effects of changing the end constraints of the wye pieces to include a spool piece and a brace between wye piece inlets  

The results were analysed to produce graphs of bending moment versus percentage SMYS in the wye pieces for each load case.  This allowed our clients to cross-check against design bending moments for different systems enabling the wye pieces to be used for a variety of load conditions without the need for further analysis.

All case studies

• Trenching study for flexible pipeline subject to trawl gear interaction
• Wye piece verification
• Front-End Subsea Pipeline Conceptual Engineering Study
• Deep water pipelay capability spreadsheet
• Upheaval Buckling Analysis of a Flexible Pipeline
• Stability analysis of subsea gas pipelines using PRCI Level 2 stability analysis software
• Preparation of MathCAD sheets for pipeline stability analysis
• Goldeneye Third-Party Verification
• Overtrawling of large diameter pipeline trials JIP
• Recommended procedures and methods for design of subsea flanges
• Steady state FEA thermal analysis of a flexible pipeline in ANSYS
• Review of the Upheaval Buckling Analysis of a Pipe in Pipe System
• Investigation of data flow to foreign fishermen
• Pig impact at riser bends
• Analysis and tests of response of subsea equipment to acoustic vibrations
• Optimisation of fins on pipeline riser fairings using CFD
• Rock dump stability study
• Offshore support on pipeline inspection survey
• Pipeline design and installation procedure verification
• Study of fishing in the Gulf of Gabes
• Evaluation of the thermal properties of pipe sections and pipeline components
• Pipeline installation pull analysis
• Overtrawling capability of subsea protective structures
• Bundle towhead over-trawling – Scale model tests
• Thermal finite element analysis of a trenched umbilical
• Mattress placement study
• Pipeline stability assessment using PRCI Level 2 and Level 3 analysis tools
• Engineering critical assessment to BS 7910:2005
• Colombo harbour development
• Fishing interaction study
• Re-assessment of overtrawlability
• North Sea field development study
• Finite element analysis of mechanical connectors
• Flange leak investigation
• Spares and repairs
• Development of pipeline design sheets in MathCad
• Overtrawling of protection structures and umbilicals
• Riser ESDV leakage rate study
• Fatigue analysis of a riser in Orcaflex
• Support to BP Subsea and Pipelines Team
• Pipeline 4001 - Girth weld defect assessment
• Historical condition and lifetime prediction for Amethyst, Wollaston and Whittle
• Trawling risk assessment
• Assessment of pig run times
• Comparitive assessment of decommissioning options
• Assessment of current/ historical status of riser and bypass pipework
• Assessment of thermowell vibration fatigue due to vortex-induced vibration (VIV)
• Validation of water injection pipelines
• Defect assessment
• Unbilical stability assessment
• Technical authority and decommissioning support
• Major accident prevention document (MAPD) review and update
• General pipeline support
• Assessment of Pipeline Spares surrently held, future Spares and preservation requirements
• Creation of Technical Assessment summary sheets for North Sea pipelines