Analysis of Corrosion Rate of DHU Pressure (Dehydration Unit) on Gas Production CO2 Removal Process

Abstract

In accordance with the development of an increasingly rapid and advanced era, especially in the field of oil and gas
management, the dehydration process is a very important process in producing good quality oil or gas. The presence of
hydrocarbons and water vapor, N2, CO2 and H2S will cause the formation of hydrates in the form of crystals and are corrosive
that can cause malfunction in pressure vessels and other processes. Thus one process is needed to remove water vapor called the
CO2 removal process. The purpose of this study was to determine the corrosion rate and remaining life time with the CO2 removal
process. To make it easier to calculate the corrosion rate and remaining life time on this pressure vessel, we refer to ASME VIII
and API 510 standards. By knowing the working pressure value of 4.9 bar or 72.52 Psi, we can know the lifetime the lowest
pressure vessel is 8.54 years. Conclusions in this study determine that upon entering the separator the highest corrosion rate of
2.01 mm / year with the longest remaining service life is 37.12 years, which mis in position 3 and location A with the corrosion
rate.