Studi Numerik Pergerakan Pig melalui Equal Tee pada Operasi Pigging

Abstract

Abstract - The existence of  Equal tee on the Pigging line is generally become a serious problem for Pig's motion. Distributing of fluid flow as driving power for Pig run and the transfer of Pig flow to the branch tee are the causes of pigging disruption on the pipeline. Some of factors that influence the Pig motion such as Reynolds number and the geometry of Pig used. The Reynolds number and Pig geometry determine the character of the Pig flow, velocity and the translation of Pig when the pigging operation is in progress. By doing numerical studies of Pig's motion through equal tee for Pigging operations using overset method on Pig geometry and degree of freedom for Pig flow, simulation, speed and translation that occure on equal tee will be proper to get the influence of Pig geometry, Reynolds number in preventing the Pig fall. The research use Foam Pig, Bullet Pig and Reverse Pig as Pig variation model and various Reynolds number that consist by Re. 591500, Re. 50000, and Re. 10000. Based on this simulation, known that increasing the Reynolds number is linear with  the Pig velocity that happened on Pig motion but increasing the velocity will happened for Pig that fall to branch tee. this simulation also show that theVarious of Pig's geometri and Reynolds number used in Pigging operations have high influence in branch or Z axis translation. Reverse Pig with Re. 10000 has lower Z axis negative (bottom) translation than another. that is -0.0014 when approaching branch tee and tends to undergo translation on Z positive when throughing the equal tee. The final translation experienced by Reverse Pig on Z axis positive is 0.02.  So using Reverse Pig for next operation is suggested to prevent Pig fall.