Quantitative Risk Assessment for Main Equipment in Acid Gas Removal and Dehydration Unit (Case Study: Train I Tangguh LNG Plan)

• Main Author: TEJO (NIM 13104017), BASKORO
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/10079
• Institution: Institut Teknologi Bandung

Risk assessment has to be done with consideration of some aspects such as operation, material, environment, financial, operator, etc in purpose to prevent failures or damages within the system. These damages can affect seriously to safety caused by blasting or toxic leakage, and also financial losses than caused by operation stoped.<p>Analysis and calculation has been done in order to find the risk level in reference by API 580 and API 581 Code for Process and Oil & Gas Equipments. As the case studies are equipments in Acid Gas Removal (Unit 21) and Dehydration Unit (Unit 31) Train 1 Tangguh LNG Plant located in Bintuni Bay, West Papua. The purpose of these risk calculations is to get the risk level in the studied equipments. Moreover, exercise to some parameters also applied in this thesis to know and get the effect to the risk level.<p>Risk level result in Unit 21 and Unit 31 are dominated by flammable and business interruption risk. The highest risk category is medium high from flammable risk. Acid Gas Absorber Top as the discussed equipment in analysis chapter, obtained the flammable area is 3,02 ft2/year, toxic area 0,00 ft2/year, business interruption 10.099,99 US$/year.<p>While linearly relation between H2S concentration - toxic risk and corrosion rate -probability rate is resulted from the exercise. Result of the exercise for the H2S concentration parameter itself showed that toxic risk rate will be going into the medium high when H2S concentration reaches 0,02% mol. While result of the exercise for the corrosion rate parameter showed that probability rate will be going into the high risk when corrosion rate reach 3,8 (mm/year).