Analisa Resiko Pada Offshore Pipeline Milik PT. Trans Pacific Petrochemical Indotama (PT. TPPI) Tuban Akibat Free Span Dengan Menggunakan Metode Risk Based Inspection (RBI)

Rudiyanto, Achmad (2014) Analisa Resiko Pada Offshore Pipeline Milik PT. Trans Pacific Petrochemical Indotama (PT. TPPI) Tuban Akibat Free Span Dengan Menggunakan Metode Risk Based Inspection (RBI). Undergraduate thesis, Institut Teknologi Sepuluh Nopember Surabaya.

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Abstract

Pada tugas akhir ini dibahas analisa resiko free span dengan moda kegagalan untuk osilasi In-flow (PSL) dan Osilasi Cross-flow (PSLC). Pipeline 36” milik PT. Trans Pacific Petrochemical Indotama (TPPI) Tuban telah mengalami span sepanjang 29 meter. Dikarenakan adanya beban lingkungan seperti beban gelombang, arus,dll. Ada kemungkinan free span akan semakin bertambah panjang dan menyebabkan kegagalan struktur. Oleh karena itu, perlu diadakan suatu inspeksi dengan berbasis keandalan. Metode Risk Based Inspection menggunakan kombinasi dua parameter yaitu kemungkinan kegagalan dan konsekuensi kegagalan. Probabilitas kegagalan didapatkan dengan menggunakan simulasi Monte Carlo dan konsekuensi kegagalan didapatkan dengan metode semi kuantitatif Risk Based Inspection (RBI), sehingga bisa diketahui risiko dari suatu segmen pipeline dengan kategori konsekuensi safety, environment, economy, dan property. Dari hasil simulasi, maka diperoleh peluang kegagalan (PoF) untuk Osilasi in-flow (PSL1) = 0.0076; in-flow (PSL2) = 0.0026%; Osilasi cross-flow (PSCL1) = 5.21 x 10-5 dan Osilasi cross-flow (PSCL2) = 2.1 x 10-5. Dengan mengacu pada API RBI 581 maka diperoleh tingkat resiko untuk jenis in-flow (PSL1) & (PSL2) dengan kategori konsekuensi safety, environment, economy: resiko medium (3A) dan medium 3B untuk kategori Property; in-flow (PSL2): resiko medium (3B) dan cross-flow (PSCL1) & (PSCL2) dengan kategori konsekuensi safety, environment, economy : medium (3A) dan medium 3B untuk kategori Property. Berdasarkan tingkat resiko tersebut, maka metode inspeksi yang tepat adalah dengan Clamp-on supports untuk frekuensi inspeksi 2 tahun sekali (menengah). ====================================================================================================== In this final project risk analysis discussed free span with a mode of failure for oscillations In-flow (PSL) and the oscillations of Cross-flow (PSLC). Pipeline 36 "belongs to PT Trans Pacific Petrochemical Indotama (TPPI) Tuban has experienced throughout the span of 29 meters. Due to the presence of environmental burden like the weight of the waves, currents, danll. There is the possibility of free will span growing long and cause failure of the structure. Therefore, it should be held an inspection-based reliability. Method of Risk Based Inspection using a combination of two parameters, namely the possibility of failure and the consequences of failure. The probability of failure is obtained by using Monte Carlo simulation and the consequences of failure is obtained with the method of semi quantitative Risk Based Inspection (RBI), so that it can be known risks of a segment of pipeline with category safetyconsequences, environment, economy, and property.From the results of the simulation, then retrieved the odds of failure (PoF) to Oscillation in-flow (PSL) = 0.0076; inflow( PSL2) = 0.0026%; Oscillation of cross-flow (PSCL) = 5.21 x 10-5 and Oscillations of cross-flow (PSCL2) = 1.3 x 10-5. With reference to the API RBI 581 obtained level of risk for different types of in-flow (PSL1) & (PSL2) with category safetyconsequences, environment, economy: medium risk (3A) and medium 3B for the category Property; in-flow (PSL2): medium risk (3B) and cross-flow (PSCL1) & (PSCL2) with category safetyconsequences, environment, economy : medium (3A) and medium 3B for the categories Property. Based on the level of risk, then the proper inspection method is with a Clamp-on supports for the frequency of inspection of once every two years (intermediate).

Item Type: Thesis (Undergraduate)
Additional Information: RSKe 665.744 Rud a
Uncontrolled Keywords: Free span, Risk Based Inspection, In-flow, Cross Flow , PSL, PSLC Simulasi Monte Carlo
Subjects: T Technology > TS Manufactures > TS280 Pipe Bending, Tube Bending
Divisions: Faculty of Marine Technology > Ocean Engineering > (S1) Undergraduate Theses
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 08 Feb 2018 06:36
Last Modified: 08 Feb 2018 06:37
URI: http://repository.its.ac.id/id/eprint/51196

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