Analisis Risiko Kerusakan Pipa Bawah Laut Menggunakan Metode Fuzzy FMEA, FTA, dan Bowtie Analysis

Indrawan, R. Dimas (2026) Analisis Risiko Kerusakan Pipa Bawah Laut Menggunakan Metode Fuzzy FMEA, FTA, dan Bowtie Analysis. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pipa bawah laut merupakan infrastruktur kritis transportasi hidrokarbon yang terpapar ketidakpastian lingkungan, degradasi material, dan gangguan eksternal. Penelitian ini menganalisis risiko kerusakan pipa bawah laut pada fase operasional di area IT Balongan, Indramayu, melalui integrasi Failure Mode and Effects Analysis berbasis fuzzy (Fuzzy FMEA), Fault Tree Analysis (FTA), risk matrix DNV-RP-F107, dan Bowtie Analysis. Identifikasi risiko dilakukan melalui studi literatur, data teknis pipa, serta penilaian lima ahli yang dibobotkan berdasarkan posisi, masa kerja, pendidikan, dan usia. Sebanyak 10 mode kegagalan dan 20 penyebab kegagalan dinilai menggunakan severity, occurrence, dan detection. RPN klasik menempatkan ship anchoring sebagai prioritas tertinggi (RPN 300), sedangkan Fuzzy-RPN menempatkan ship sinking sebagai prioritas pertama (FRPN 8,28), diikuti ship anchoring (8,26) dan dropped object (8,00). FTA menghasilkan probabilitas kerusakan pipa sebesar 0,03599188 dan terverifikasi dengan perangkat lunak DPL 9 sebesar 0,0359923. Kontribusi terbesar berasal dari aktivitas laut (0,032934113), disusul konstruksi bangunan laut (0,001839498) dan korosi (0,001324841). Pemetaan DNV-RP-F107 mengategorikan aktivitas laut sebagai very high, konstruksi laut sebagai high, dan korosi sebagai medium. Bowtie Analysis menghasilkan pengendalian berlapis berupa kontrol navigasi dan zona larangan jangkar, pengendalian lifting dan exclusion zone, serta risk-based inspection, pengelolaan coating, pigging, inhibitor, dan cathodic protection. Integrasi metode memberikan alur prioritisasi, kuantifikasi, evaluasi keterterimaan, dan formulasi mitigasi yang saling melengkapi.
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Subsea pipelines are critical hydrocarbon transportation infrastructure exposed to environmental uncertainty, material degradation, and external disturbances. This study analyzes the risk of submarine pipeline damage during the operational phase in the IT Balongan area, Indramayu, through the integration of fuzzy-based Failure Mode and Effects Analysis (Fuzzy FMEA), Fault Tree Analysis (FTA), DNV-RP-F107 risk matrix, and Bowtie Analysis. Risk identification was carried out through literature studies, pipeline technical data, and assessments by five experts weighted by position, length of service, education, and age. A total of 10 failure modes and 20 failure causes were assessed using severity, occurrence, and detection. The classic RPN places ship anchoring as the highest priority (RPN 300), while the Fuzzy-RPN places ship sinking as the first priority (FRPN 8.28), followed by ship anchoring (8.26) and dropped object (8.00). FTA produces a pipeline damage probability of 0.03599188 and is verified with DPL 9 software at 0.0359923. The largest contribution comes from marine activities (0.032934113), followed by marine construction (0.001839498) and corrosion (0.001324841). DNV-RP-F107 mapping categorizes marine activities as very high, marine construction as high, and corrosion as medium. Bowtie Analysis produces layered controls in the form of navigation control and anchoring prohibition zones, lifting control and exclusion zones, as well as risk-based inspection, coating management, pigging, inhibitors, and cathodic protection. The integration of methods provides a complementary flow of prioritization, quantification, acceptability evaluation, and mitigation formulation.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Bowtie Analysis, Fault Tree Analysis, Fuzzy FMEA, Manajemen Risiko,Pipa Bawah Laut, Bowtie Analysis, Fault Tree Analysis, Fuzzy FMEA, Risk Management,Subsea Pipeline
Subjects:	H Social Sciences > HD Industries. Land use. Labor > HD61 Risk Management Q Science > QA Mathematics > QA9.64 Fuzzy logic Q Science > QA Mathematics > QA248_Fuzzy Sets T Technology > TN Mining engineering. Metallurgy > TN879.5 Petroleum pipelines
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	R. Dimas Indrawan
Date Deposited:	21 Jul 2026 03:23
Last Modified:	21 Jul 2026 03:23
URI:	http://repository.its.ac.id/id/eprint/135898

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