Analisa Tegangan pada Expansion Joint Sistem Perpipaan Diesel Fuel Tank

Abstract

Expansion joints installed on 30-inch pipelines that flow crude oil fluid, suffered damage caused by the high value of the bellows stress in the design conditions, resulting in over stress and over pressure on the expansion joint bellows. Stress analysis and static loading on the pipeline along with expansion joint bellows components are needed to determine the value of the internal pressure and stresses that occur. Static analysis using CAESAR II software includes stress analysis, pipe loading and pipe flexibility according to ASME B31.3 standard. While the bellows stress analysis refers to the EJMA standard. The results of static stress analysis are still within safe limits, but in a failure condition, the load received by the expansion joint is 55528 lb, exceeding the value of expansion joint pressure thrust. The amount of load received by the expansion joint, resulting in an internal pressure value of 75,175 psi exceeds the design limit, so that over pressure occurs in the expansion joint and surrounding pipelines. In addition, the value of the stress that occurs in the expansion joint bellows of 29372.601 psi, exceeds the permit limit of material stress according to EJMA standards, resulting in over stress on the bellows.