Analysis of Leakage in Nearshore Pipelines Using Fitness for Service Method to ensure Mechanical Integrity Based on API-579 Level 3

Authors

• Elriandri Elriandri, Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok, West Java, 16424, IndonesiaFollow
• Dedi Priadi, Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok, West Java, 16424, IndonesiaFollow

Abstract

The Fitness for Service (FFS) analysis is performed as a quantitative assessment to evaluate the integrity condition of a pipeline. Essentially, FFS assessment helps determine whether equipment components can operate safely despite existing deficiencies. This evaluation is carried out using the Finite Element Method (FEM). In the case of an underwater pipeline that experiences leak due to anchor pull at the flange connection, it undergoes plastic deformation and is lifted approximately 1 meter. As a mitigation step, inspection and repairs have been carried out by the company. Subsequently, modeling is performed to reconstruct the deformation process of the pipeline. Then, analyses are performed for Vortex Induced Vibration (VIV) and fatigue. The results of these analyses indicate that the pipeline is still in an acceptable condition, making it suitable for normal operation. Additionally, flow simulations are considered in the study, with various sensitivities to estimate the remaining service life of the pipeline. Based on sensitivity to flow conditions, the minimum estimated service life of the pipeline is 3 years.

References

Aldara D R, Dewi R S & Mulananda A M 2020, ‘Analisa kerusakan pipa bawah laut akibat dari kejatuhan jangkar’, Jurnal Techno Bahari, 1(10), pp. 33–38.

API & ASME 2007, API 579-1/ASME FFS-1: Fitness-for-Service, 2nd edn, American Petroleum Institute, Washington D.C.

ASME 2021, ASME Boiler and Pressure Vessel Code Section V: Non-Destructive Examination, ASME, New York, USA.

BBC 2018, ‘Indonesia declares state of emergency as oil spill spreads’, [Online], Available at: https://www.bbc.com/news/world-asia-43625611

Bearman P W 2009, ‘Understanding and predicting vortex induced vibrations’, Journal of Fluid Mechanics, 634, pp. 1–4.

DNV-GL 2017, DNVGL-RP-F105: Recommended Practice Free Spanning Pipelines, DNV-GL, Norway.

Dong J, Chen X, Wang B, Guan W, Yang T, Fan Z & Pan J 2013, ‘Fatigue analysis of free span for submarine pipeline’, ASME Pressure Vessels and Piping Conference: Volume 7 - Operations, Applications and Components.

EcoWatch 2018, ‘Cracked undersea pipeline caused deadly oil spill in Indonesia’, [Online], Available at: https://www.ecowatch.com/oil-pipeline-spill-indonesia-2556434833.html

NTSB 2024, ‘Anchor strike of underwater pipeline and eventual crude oil release’, [Online], Available at: https://www.ntsb.gov/investigations/AccidentReports/Reports/MIR2401.pdf

Waskito R, Artana K B & Pratiwi E 2020, ‘Risk assessment of subsea pipeline using standard DNVGL-RP-F107’, IOP Conference Series: Earth and Environmental Science, 557.

Recommended Citation

Elriandri, Elriandri and Priadi, Dedi (2025) "Analysis of Leakage in Nearshore Pipelines Using Fitness for Service Method to ensure Mechanical Integrity Based on API-579 Level 3," Journal of Materials Exploration and Findings: Vol. 4: Iss. 3, Article 2.
DOI: 10.7454/jmef.v4i3.1071
Available at: https://scholarhub.ui.ac.id/jmef/vol4/iss3/2