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Jurnal Teknologi dan Riset Terapan (JATRA)
Published by Politeknik Negeri Batam
ISSN : 26854910     EISSN : 26854910     DOI : -
Core Subject : Science, Engineering,
Aerospace Engineering Computer Science & IT Electrical & Electronics Engineering Engineering Mechanical Engineering
Jurnal Teknologi dan Riset Terapan (JATRA) is scientific, peer-reviewed and open access journal managed and published by Research and Community Services, Politeknik Negeri Batam. The journal is published two times a year on June and December. Jurnal Teknologi dan Riset Terapan (JATRA) provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 7 Documents
 1 
Search results for , issue "Vol 5 No 1 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2023" : 7 Documents clear
Studi Replating Area Forepeak & Deep Tank pada Kapal Tanker 105 Meter Berdasarkan Hasil Pengujian Ultrasonic Thickness Test Arif Hidayatullah; Mufti Fathonah Muvariz; Hendra Saputra; Wowo Rossbandrio; Nidia Yuniarsih
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 5 No 1 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2023
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v5i1.3655

Abstract

In shipbuilding, various stages of surveys are conducted when a vessel is declared fit for operation, encompassing annual surveys, intermediate surveys, and special/extension surveys. During these surveys, commonly encountered issues include corrosion and reduction in plate thickness associated with the ship's age and year of construction. In cases of significant thickness reduction, replating procedures are implemented. The examination of plate thickness involves ultrasonic testing utilizing the Cygnus Ultrasonic Gauge, with prior visual inspections performed on each plate section. When inspections reveal considerable thickness reduction and indications of corrosion during visual tests, such instances are evident in areas like the forepeak and deep tank. Substantial thickness reduction is noted on both the port and starboard sides, covering a dimension of 1,200 mm × 400 mm along each plate line, employing standard 12 mm thickness material. Test results are obtained for plate lines numbered 1 to 4 on the port and starboard sides of the Forepeak Tank area, as well as plate lines numbered 1 to 3 on the port side and plate lines numbered 1 to 4 on the starboard side within the Deep Tank region.
Hazard Identification And Risk Assesment (HIRA) Pada Proses Riksa Uji Mesin Crimping Semi-Otomatis Rahman Hakim; Dety Febrianti; Mutiarani Mutiarani; Annisa Fyona; Mega Gemala; Nur Fitria Pujo Leksonowati; Hanifah Widiastuti; Benny Haddli Irawan; Auliana Diah Wilujeng
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 5 No 1 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2023
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v5i1.4708

Abstract

Every phase of work activities in a workplace is inevitably associated with potential hazards and risks that can lead to both workplace accidents and occupational illnesses. To mitigate these hazards effectively, the identification and assessment of risks are imperative, providing a foundation for offering constructive recommendations to the respective companies. The process of hazard identification and risk assessment adheres to the risk management stages, aligned with the AS/NZS 4360:2004 standard on Risk Management, encompassing the determination of consequences (severity) and probability levels (likelihood) to ascertain the risk levels within each work process phase. Upon establishing these risk levels, comprehensive recommendations for control programs can be devised, aimed at averting workplace accidents and occupational diseases. Data acquisition is carried out through surveys/observations involving workers and document reviews. The observations were conducted within the production area, specifically focusing on the semi-automatic crimping machine inspection process at PT. SWS in December 2022. The research findings reveal that within the crimping machine inspection process, the risk percentages are distributed as follows: 0% at the extreme risk level, 65% at the high risk level, 35% at the moderate risk level, and 0% at the low risk level. Effective control and supervision measures are essential to prevent the occurrence of workplace accidents and occupational illnesses. These measures offer significant benefits, encompassing enhanced work productivity, improved work morale, and a fortified corporate reputation. The researcher proposes a range of control measures, spanning substitution, engineering, administrative adjustments, and personal protective equipment provisioning.
Pengaruh Jumlah Mata Sayat Flute End Milling Cutting Terhadap Kualitas Permukaan Austenite Stainless Steel (ASS) 304 Hendra Butar Butar; Rahman Hakim; Windy Stefani; Saiful Arif; Nugroho Pratomo Ariyanto
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 5 No 1 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2023
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v5i1.4870

Abstract

The working principle of CNC Milling machine is the machine rotates and contacts with the workpiece so that erosion and cutting occur. The machining process affects the mechanical properties of the material, so it needs to conduct a study to determine changes in the character of the material due to the machining process. This research was conducted to determine the effect of the number of 2 flutes and 4 flutes on the workpiece surface roughness using PMC-5VT20 CNC Milling machine. Specimens test use 304 material stainless steel that has strength and resistance to the corrosive. The research method was carried out experimentally using 304 stainless steel material which had been done with a finishing process using an endmill cutter with 2 flutes and 4 flutes. The roughness of specimens were tested using surface roughness tester to determain the effect of flute number on the surface roughness. The result of testing shows that the number of flutes affects the roughness of the machining process. The roughness value using 2 flutes is lower than the use of 4 flutes.
Ship Recycling Rig Hibiscus Ditinjau Dari Sistem Manajemen Daur Ulang Ramah Lingkungan Mufti Fathonah Muvariz; Benny Haddli Irawan; Aziz Nur Rahman; Lalu Giat Juangsa Putra
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 5 No 1 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2023
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v5i1.5183

Abstract

Ship recycling is considered the best alternative for disposing of obsolete ships. Ship recycling is an activity related to the ship recycling process, such as mooring/grounding of ships, taking, and repairing ship materials. The existence of the ship recycling industry in Indonesia includes Tanjung Jati (Madura), Cilincing (North Jakarta), Tenggamus (Lampung) and Tanjung Uncang (Batam). This study aims to determine the process of ship recycling hibiscus rigs carried out at PT. Batam Citra International, Tanjung Uncang, Batam City. Based on the results of the research conducted, it was found that the ship recycling rig hibiscus process was carried out using a cutting plan work plan, with the following stages: (1) Pre-arrival process at Sekupang anchorage, (2) Customs inspection at Sekupang Port, (3) Ship towed from Sekupang Harbor to PT. BES ship berths, (4) General inspection by PT. BCI and PT. BES, (5) Inspection by local environmental agencies, (6) Marking of IHM/dangerous substances on ships, (7) Transfer of hazardous and non-hazardous materials on board, (8) Transfer of oil and other flammable goods, (9) Engine room cleaning, (10) Ship recycling starts, (11) Monthly review of hazardous waste disposal, (12) Review of incidents that occurred and precautions taken, (13) Results of ship recycling, and finally, and (14) Compilation of ship recycling compliance reports.
Identifikasi Flashing Pada Mold Alat Cukur Benny Haddli Irawan; Mufti Fathonah Muvariz; Nicolanta Hiskia Sembiring; Nur Fitria Pujo Leksonowati; Rahman Hakim; Ihsan Saputra
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 5 No 1 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2023
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v5i1.5239

Abstract

Molding is a process utilized by industries to shape plastic products. One of the plastic molding processes involves injection molding. Injection molding is a procedure where plastic pellets are placed into a hopper or channel and subsequently fed into a barrel. The injection is propelled by a screw mechanism through a machine nozzle and a sprue bushing enters the mold cavity. All of this occurs within a closed mold. A flashing defect in a product refers to an excess material flaw located at the product's edges. To identify the causes of flashing defects in shaving tools, a fishbone diagram is employed, categorizing factors into five: machine factors, material factors, method factors, human factors, and mold factors. The identification results show that flashing defects in shaving tools are primarily attributed to mold factors, where 37 cavities exhibit flashing defects.
Pengujian Nilai Kekerasan Material ABS EH36 Hasil Proses Heat Straightening Nurul Laili Arifin; Ikram Akrabi; Lalu Giat Juangsa Putra; Fedia Restu; Cahyo Budi Nugroho; Nugroho Pratomo Ariyanto
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 5 No 1 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2023
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v5i1.5426

Abstract

Heat straightening is a method of repairing material distortion caused by welding heat. Heat straightening is done by heating the material in an area that is distorted and cooled slowly in the air until the desired material dimensions tolerance appropriate are achieved. The Heat Straightening method is carried out at a range suhu 370℃-550℃ using the oxy-acetylene method for the heating process. This research is aimed to find out effect Heat Straightening proses the hardness value on ABS EH36 material. The hardness testing method used is the Hardness Vickers test with load applied 10kgf on Carbon Steel ABS EH 36. From the research it is known that the hardness value in the base metal area is higher than the heat straightening area with an average hardness value of 192.1 HV10 in the base metal area and an average hardness value of 185 HV10 in the heat straightening area.
Pengujian Mekanis dan Korosi pada Weld Overlay Pipa API 5L X65 Hasil Pengelasan GTAW Nugroho Pratomo Ariyanto; Ari Wibowo; Wowo Rossbandrio; Hanifah Widiastuti; Domi Kamsyah
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 5 No 1 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2023
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v5i1.5520

Abstract

Pelapisan (cladding) material corrosion resistant alloy (CRA) menggunakan Inconel 625 memadukan properti ketahanan korosi Inconel 625 dan kekuatan (high strength) pipa baja API 5L X65. Sampel lapisan CRA difabrikasi dengan pengelasan Pulsed Gas Tungsten Arc Welding (GTAW). Filler metal ERNiCrMo-3 dengan dua merk yang berbeda, yaitu RW625 dan NM625, digunakan sebagai material CRA. Pengujian non-destruktif berupa visual testing, liquid penetrant testing dan ultrasonic testing menunjukkan tidak terdapat cacat pengelasan pada deposisi lapisan CRA maupun antar-muka lapisan CRA dan base metal. Pengujian kekerasan Vickers menunjukkan NM625 memiliki nilai kekerasan 228 ±8,8 HV10 (layer 1) dan 231.6 ±10,8 HV10 (layer 2), sedangkan RW625 memiliki nilai kekerasan 203.4 ±8,1 HV10 (layer 1) dan 213.6 ±6,3 HV10. Kedua filler metal menghasilkan nilai Pitting Resistance Equivalent Number (PREN) yang sama 48, yang menunjukkan kedua filler metal memiliki properti ketahanan korosi yang sama.

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