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All Journal Jurnal Universal Technic JURNAL SAINS DAN TEKNOLOGI MARITIM Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim
Wa’addulloh, Mu’izzaddin
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Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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ANALISIS SAND BLASTING DAN COATING KAPAL MT.SUCHAONUGNUM Wa’addulloh, Mu’izzaddin; Purwanto, Purwanto
JURNAL SAINS DAN TEKNOLOGI MARITIM Vol 24, No 2 (2024): Maret
Publisher : UNIMAR AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33556/jstm.v24i2.404

Abstract

Indonesia adalah negara kepulauan dengan wilayah lautan luas dan memiliki banyak jalur perdagangan dunia. Untuk itu, moda transportasi laut perlu ditingkatkan serta dipertahankan kualitasnya dari berbagai bahaya seperti korosi. Lambung kapal merupakan daerah yang selalu terjadi kontak langsung dengan air laut sehingga membutuhkan perlindungan dan perawatan ekstra. Sandblasting adalah metode pembersihan permukaan lambung kapal dari korosi, sisa lapisan cat lama, serta bekas penempelan fouling dengan menggunakan pasir silika sebagai zat abrasive. Objek penelitian ini yaitu kapal TK. Berkat 12 di sandblasting dengan tingkat kebersihan Sa2.5. Luas area yang sandblasting mencakup 2049 m² untuk sweep blasting dan 1202 m² untuk spot blasting. Setelah sandblasting dilakukan painting yaitu proses perawatan dan perlindungan lambung kapal dari bahaya kerusakan akibat korosi dan fouling. Pada lambung kapal TK. Berkat 12 dilakukan tiga kali coating pada area BGA dengan menggunakan cat primer AC, intermediate AC, dan AF, serta dua kali coating pada area AGA menggunakan cat primer AC dan finishing AGA. Luas area coating primer AC sebesar 3251 m², intermediate AC sebesar 3223 m², AF sebesar 3223 m², dan finishing AGA sebesar 928 m². Berdasarkan hasil inspeksi pengecatan berupa pengukuran DFT diketahui bahwa hasil painting TK Berkat 12 telah memenuhi standar BKI.
Analisis Tingkat Kebisingan di Kamar Mesin Kapal MT. Suchaonugnum Serta Pemilihan Peredaman Wa’addulloh, Mu’izzaddin; Purwanto, Purwanto
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 2 (2024): Juni : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i2.2455

Abstract

Noise can be defined as a sound or noise that can disturb comfort and health and can cause deafness. Noise that occurs continuously with high intensity can unconsciously affect the health of the Crew (ABK) who are on duty on the ship. Health problems can occur because the ABK are required to be in the ship's engine room which can last a very long time according to the route of the ship's voyage. This study aims to determine and analyze the noise in the engine room and accommodation room on the ferry. The data analysis technique used in this study is noise measurement and analysis of measurement data. The results of the study showed that there was 1 room on the MT. Suchaonugnum ship that did not meet the standards of the Indonesian Classification Bureau and MSC.337(91), including the engine control room. The highest noise source produced in the engine room is produced by the auxiliary engine. While in the lounge room, passenger accommodation room and VIP Room the highest sound source is produced by the sound system. The sound system that is always turned on when the ship is operating is one of the sources of noise that makes the noise level in the passenger accommodation room not in accordance with the MSC.337(91) standard because the sound pressure is too high. The noise level in the passenger accommodation space can be overcome by reducing the sound pressure on the sound system.
Analisa Pengaruh Variasi Bevel Dan Penggunaan Backing Ceramic Terhadap Kekuatan dan Defect Material Baja Grade A Pengelasan Shield Metal Arc Welding (SMAW) Muflih, Abdullah; Sangadji, Ramli; Hamid, Abdul; Sutrisno, Sutrisno; Wa’addulloh, Mu’izzaddin
Jurnal Universal Technic Vol. 4 No. 1 (2025): Jurnal Universal Technic
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/unitech.v4i1.3701

Abstract

Grade A steel plates are commonly used in marine and offshore structures due to their high corrosion resistance. This study investigates the effect of bevel angle variations (30°, 40°, and 50°) and the use of ceramic backing on the mechanical properties and welding defects of Grade A steel using the Shielded Metal Arc Welding (SMAW) method. Welding was conducted with four-pass multipass welding. An experimental approach was employed, including macro visual inspection, dye penetrant, tensile, and impact testing. Results showed that specimens without ceramic backing (P1) had more defects such as incomplete penetration and spatter compared to those with backing (P2). All specimens met ASTM E23 impact standards (average 23.9–24.1 J/mm²). Tensile tests revealed that ceramic backing improved strength, with the highest UTS (576.1 MPa) and elongation (25%) found.
ANALISIS SAND BLASTING DAN COATING KAPAL MT.SUCHAONUGNUM Wa’addulloh, Mu’izzaddin; Purwanto, Purwanto
JURNAL SAINS DAN TEKNOLOGI MARITIM Vol. 24 No. 2 (2024): Maret
Publisher : UNIMAR AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33556/jstm.v24i2.404

Abstract

Indonesia adalah negara kepulauan dengan wilayah lautan luas dan memiliki banyak jalur perdagangan dunia. Untuk itu, moda transportasi laut perlu ditingkatkan serta dipertahankan kualitasnya dari berbagai bahaya seperti korosi. Lambung kapal merupakan daerah yang selalu terjadi kontak langsung dengan air laut sehingga membutuhkan perlindungan dan perawatan ekstra. Sandblasting adalah metode pembersihan permukaan lambung kapal dari korosi, sisa lapisan cat lama, serta bekas penempelan fouling dengan menggunakan pasir silika sebagai zat abrasive. Objek penelitian ini yaitu kapal TK. Berkat 12 di sandblasting dengan tingkat kebersihan Sa2.5. Luas area yang sandblasting mencakup 2049 m² untuk sweep blasting dan 1202 m² untuk spot blasting. Setelah sandblasting dilakukan painting yaitu proses perawatan dan perlindungan lambung kapal dari bahaya kerusakan akibat korosi dan fouling. Pada lambung kapal TK. Berkat 12 dilakukan tiga kali coating pada area BGA dengan menggunakan cat primer AC, intermediate AC, dan AF, serta dua kali coating pada area AGA menggunakan cat primer AC dan finishing AGA. Luas area coating primer AC sebesar 3251 m², intermediate AC sebesar 3223 m², AF sebesar 3223 m², dan finishing AGA sebesar 928 m². Berdasarkan hasil inspeksi pengecatan berupa pengukuran DFT diketahui bahwa hasil painting TK Berkat 12 telah memenuhi standar BKI.
Analisis Pengaruh Arus dan Tegangan Pengelasan 3 G Conveyor Terhadap Struktur dan Sifat Baja Wa’addulloh, Mu’izzaddin; Diansisti , Anisa; Purwanto, Purwanto
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 2 No. 3 (2023): September : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v2i3.1965

Abstract

In the world of the PLTU industry, the need for material, especially the need for the sapot process and conveyor repairs, occurs in the world of PLTU, which is installed on the conveyor construction and when connecting materials, different grades are often used and this often occurs in the field during the process of combining plates with different grades. on the sapote. and for installing the plate on the sappot, use grade A and the plate that is often used is the plate for the machine foundation with grade B on the sappot material using low carbon grade A steel. In this research report, welding is carried out and combined with grade A steel which is usually used for sappots. the conveyor is combined with low carbon grade B steel in the construction of the PLTU sapot. Where welding is carried out 3x why this needs to be done is because to know the characteristics of low carbon grade A steel and low carbon grade B steel, whether the characteristics are the same or not because they are used in When grade A steel material runs out in the industry, the testing process uses 3 tests, namely to determine NDT testing (Non Destructive, test), tensile testing, and micro testing for the testing process. (DonyPerdana and Ahmad Bazy Syarif, 2017).
Co-Authors Abdul Hamid Diansisti , Anisa Muflih, Abdullah Purwanto Purwanto Purwanto, Purwanto Sangadji, Ramli Sutrisno, Sutrisno