CASE STUDY TEMPLATE CASE STUDY NUMBER: DESCRIPTION: CLIENT: Case Study 22 4" T-PIECE WITH FLANGE NOZZLE TENGIZCHEVROIL SERVICE: Line size Design Pressure Operating Presure Design Temperature Operating Temperature Material Line Class 13,7 4" 1 100 50 SA-333 Gr6 150k01 Compiled by: C Schimper Approved by: M Edwards Revision :A Document number: SD020 Effective date: 14/11/2016 1 PageCASE STUDY TEMPLATE Complete seperation of a 2'' branch on a 4'' header due to extreme corrosion underground. Client report: Visual inspection results are following: - General and pitting corrosion of the main header, separate pits are up to 3mm deep - Damage of drain nozzle - Significant general corrosion of vertical pipe sections - Areas with through wall damage of heater tracer. Currently heat tracing is swit

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