Partial Stroke Testing of Emergency Shutdown Valve (FISHER)

This report essentially discusses the basic understanding to comprehend the technology of Partial Stroke Testing (PST) of Emergency Shutdown Valve (ESV) and how it is conducted and analyzed. In general, this project deals with Yokogawa FA-M3 Controller and the FISHER, METSO and MASONIELAN rotary shutdown valves. However, this report will focus mainly on the testing of FISHER valves. The objective of the project is to perform 90 days of Partial Stroke Testing (PST) to FISHER Emergency Shutdown Valve (ESV) and to compare and verify the technology used with other vendors. This report also explained the valve components and the basic of Programmable Logic Control (PLC). The chapter on methodology explained the procedure for executing PST to the respective valve. It also lists out the tools and equipments needed to execute this project. The chapter that follows discusses the results as well as the problems faced during the execution of the project. Analysis of the findings is also shown in this chapter. Finally, the last chapter discusses the summary of the overall project. Throughout this project, the main task involved dealing with the PLC Ladder Logic Programming and the effect of the valve design to the Partial Stroke Testing. Sharing of ideas with PETRONAS engineers from Improvement Working Group (IWG) of Skill Group 14 (SKG14) are also conducted to compare the performance of various valves for use in PETRONAS plants. The outcome of this project would be very useful for the PETRONAS to adopt PST strategy in their plant nationwide.