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).
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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 (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
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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