ANALISIS KERUSAKAN INERT GAS SYSTEM PADA SAAT BONGKAR MINYAK MENTAH DI MT. BULL PAPUA

KHAFIDZ, CHOIRUL A (2019) ANALISIS KERUSAKAN INERT GAS SYSTEM PADA SAAT BONGKAR MINYAK MENTAH DI MT. BULL PAPUA. Diploma thesis, POLITEKNIK ILMU PELAYARAN SEMARANG.

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Abstract

ABSTRAKSI Khafidz Choirul Anam, 2019, NIT: 51145123.N, “Analisis kerusakan Inert Gas System pada saat bongkar minyak mentah di MT. Bull Papua”,Program Studi Nautika, program diploma IV, Politeknik Ilmu Pelayaran Semarang, Pembimbing I: Capt. Agus Hadi Purwantomo M.Mar. dan Pembimbing II: Daryanto S.H., M.M. Di kapal tanker minyak, bahaya kebakaran dan ledakan, kemungkinan terjadinya sangat besar, di mana peraturan internasional mensyaratkan bahwa kapal tanker dengan bobot mati lebih dari 20.000 ton harus dilengkapi dengan Inert Gas System (IGS) untuk mencegah kebakaran atau ledakan di dalam tangki muatan. Namun, ketika melakukan pembongkaran, Inert Gas System rusak yang mengakibatkan proses pembongkaran dilakukan tanpa menggunakan alat tersebut. Hal ini tentu saja akan menyebabkan keterlambatan dalam melakukan pembongkaran minyak mentah, para kru kapal dituntut untuk dapat mengatasi masalah tersebut sehingga pembongkaran akan terus dilaksanakan agar kapal tidak off hire. Metode penelitian yang digunakan oleh penulis adalah metode kualitatif dan menggunakan jenis penelitian deskriptif observasional, sedangkan metode pengumpulan data yang digunakan adalah metode wawancara, observasi dan studi pustaka terkait dengan penggunaan dan perawatan Inert Gas System. Dari hasil penelitian ini, dapat ketahui bagaimana cara mengatasi kerusakan alat dengan mengurangi discharge rate yang semula kekuatan pompa hingga 2500 kl/jam kemudian diturunkan menjadi 700-800 kl/jam sehingga tidak ada penyusutan di tangki muatan sebagai akibat dari kerusakan Inert Gas system. Katup vakum dari PV valve dan mast riser dibuka secara manual sehingga udara dapat masuk dan mengganti volume cairan yang dipompa keluar. Selama pembongkaran dilakukan dengan mengurangi discharge rate, chief engineer dan masinis melakukan perbaikan pada IG scrubber yang mengalami kerurusakan pada bagian demister. Setelah IG scrubber diperbaiki dan Inert Gas System dapat dinyalakan kembali, pembongkaran berjalan seperti sebelumnya dengan mengembalikan discherge rate awal dan menutup katup vakum pv valve dan mast riser. Pembongkaran dilakukan sesuai dengan International Safety Guide for Oil Tankers and Teminals. ABSTRACT Khafidz Choirul Anam, 2019, NIT: 51145123.N, “Analisis of Inert Gas System failure during during crude oil discharging on MT. Bull Papua”, Nautical department, program of diploma IV, Merchant Marine Polytechnic Of semarang, Lecture I: Capt. Agus Hadi Purwantomo M.Mar. and Lecture II: Daryanto S.H., M.M. On oil tankers, fire and explosion hazards, the likelihood of occurrence is very large, for which international regulations require that tankers with a deadweight of over 20,000 tons must be equipped with an Inert Gas System (IGS) to prevent fires or explosions in cargo tanks. However, when carrying out the discharge operation, an Inert Gas System was damaged which resulted in the execution of the discharge operation carried out without using the tool. This of course will cause delays in carrying out crude oil dismantling, the crew of the ship is required to be able to overcome the problem so that the discharge operation will continue to be carried out so that the ship is not off hire. The research method used by the author is a qualitative method and uses a type of observational descriptive research, while the data collection method used is the method of interview, observation and literature study related to the use and treatment of IGS. From the results of this study, it can be seen how to overcome the damage of the tool by reducing the discharge rate which was originally pump strength up to 2500 kl/h then reduced to 700-800 kl/h so that there is no shrinkage in the cargo tank as a result of damage to Inert Gas System. The vacuum valve from the PV valve and mast riser is opened manually so that air can enter and replace the volume of liquid pumped out. Overnight the discharge operation was carried out by reducing the discharge rate, the chief engineer and machinists carried out repairs to the IG scrubbers which were damaged in the demister section. After IG scrubbers have been repaired and the IGS can be restarted, the discharge operation runs as before by restoring the initial discharge rate and closing the vacuum valve pv valve and mast riser and dismantling is carried out according to the International Safety Guide for Oil Tankers and Terminals.

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