INTEGRITY AND REMAINING STRENGTH ANALYSIS FOR CORRODED PIPELINES BASED ON CODE ASME B31G AND DNV-RP-F101 (CASE STUDY CILAMAYA-CILEGON PIPELINE)

• Main Author: PRABOWO S.R. (NIM : 13104026); Pembimbing: Dr. Ir. IGN Wiratmaja Puja, HARGO
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/20154
• Institution: Institut Teknologi Bandung

During its service in onshore or offshore, pipeline is corroded or degradated by its contact with work fluid and environment. Obviously it is reduce strength and integrity of pipeline. Thus, quantitative analysis for integrity and remaining strength is needed to obtain maximum allowable operating pressure and status wheather corroded regions of along pipeline is safe for operating or not. In this final project, we analyze the integrity and remaining strength of corroded pipeline based on ASME B31G and DNV-RP-F101. In order to ease in anlyze, a new calculation sheet that was capable to process one thousand corrosion data which were resulted by smart pigging process was developed. As case study, we analyzed integrity and remaining strength of Cilamaya-Cilegon pipeline system by using corrosion data for 794 different location as input for calculation. From the analysis, most critical corrosion location has been obtained, that was 114,5 km in absolut distance. Pipeline strength in that location was reduced about 7,28% (based on ASME B31G), 33,66% (based on DNV-RP-F101 Part A), and 20,06% (based on DNV-RP-F101 Part B). Maximum allowable operating pressure for that location based on ASME B31G, DNV-RP-F101 Part A, and DNV-RP-F101 Part B respectively were 1.081,23 psi, 991,07 psi, and 1.081,78 psi. If it is compared with current MOP (Maximum Operating Pressure) which was only 700 psi, it can conclude that Cilamaya-Cilegon pipeline system is safe and could be continue to service.