Failure Analysis and FEM Study of a Spline Plug in a High-Pressure Flow Regulation Valve

Abstract

In the offshore oil and gas business, valve failure is a big risk that can cost a lot of money. It leads to very bad things happening, like losing property or production because a company has to shut down, as well as health, safety, and environmental (HSE) problems like oil and gas spills, pollution, and even death. In the Norwegian offshore industry, different kinds of valve failures have happened for a number of reasons, including bad material choice, corrosion, high stresses and loads on valve parts, not coating them, and not inspecting them. This report talks about an SS 420 plug part that was broken while it was in use. It is a valve plug stem. It is necessary to look into the type of failure and its most likely cause. In the early stages of the study, it was thought that the failure might have been caused by a sudden impact on the stem. Since the part went through all of the NDT tests before it installed, there is almost no chance that the stem will break because of a flaw in the material. This work focuses on the results of a thorough analysis of failure that was done in line with the requirements. The investigation of failure plug will be carried by using finite element analysis (FEA). The FEA will include stress and modal analysis to investigate the actual failure regions and deformation in the vibration due to high pressure.