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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 85 Documents
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Pemetaan Sebaran Titik Panas (Hotspot) Tahun 2017-2021 Di Kota Batam Putri Ariani Trestiyan; Arif Roziqin
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 4 No 2 (2022): Jurnal Teknologi dan Riset Terapan (JATRA) - December 2022
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v4i2.4665

Abstract

The city of Batam has a bush area that is quite extensive so that this can trigger forest and land fires in the city of Batam. The city of Batam has quite hot weather so that it is one of the factors that cause forest fires. The purpose of this study is to determine the distribution of the value or number of hotspots in 2017-2021 in Batam City and to determine the distribution of hotspots to land cover in 2017-2021 in Batam City. This study uses several data, namely MODIS image hotspot data sourced from the National Aeronautics and Space Institute (LAPAN) for 2017-2021, a map of land cover distribution and an administrative map of Batam City. The initial data processing process in this research is to convert MODIS image hotspot data obtained from the National Institute of Aeronautics and Space (LAPAN) with .csv format into .shp format for further overlaying with a land cover map, after that perform a gridding process that aims to to get the distribution of values or the number of hotspots. From the results of MODIS image hotspot data sourced from the National Institute of Aeronautics and Space (LAPAN) during 2017-2021 there are 119 hotspots located in 22 clusters in an area of 1km x 1km and during 2017-2021 it is known that the number of hotspots (hotspots) in the scrub area there are 8 hotspots in forest areas there are 6 hotspots and in non-forest areas there are 105 hotspots.
Identifikasi Tebal Plat Lambung Kapal Tanker Tyche IMO 8794891 Dengan Ultrasonic Thicness Gauge Aulia Fajrin; Mutiarani Mutiarani; Nugroho Pratomo Ariyanto; Wissesa Wissesa
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 4 No 2 (2022): Jurnal Teknologi dan Riset Terapan (JATRA) - December 2022
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v4i2.4786

Abstract

NDT means testing without damaging the material or specimen. One of the NDT equipment that can be used to measure the thickness of the hull plate is the Ultrasonic Thickness Gauge (UTG). This tool uses sound waves that are reflected and received by the probe and converted to numerical data, the number is used to see the thickness of the plate material. The research purpose is identifying the thickness of tanker Tyche hull plate by Ultrasonic Thickness Gauge (UTG). Based on data from the Tyche hull shell opening table on the portside and sideboard the smallest test results are 9.7 mm. These results are still included in the tolerance because if the initial plate thickness is calculated from 12 mm – 2.4 mm, then the minimum acceptable thickness is 9.6 mm. If it is found that the plate thickness is below 9.6 mm based on the standards from the Indonesian Classification Bureau (BKI), the plate will be declared NG (Not Good) and the replating process will be carried out. Based on the test table, no UTG results were found which were below the standard plate thickness that had been set. Therefore, the Tyche tanker with the IMO code 8794891 is still feasible to operating and there is no need for a partial or complete replating process.
Stress dan Displacement Pada Spreader Beam Akibat Variasi Pembebanan Mukhlis Ramadhani; Ihsan Saputra; Budi Baharudin
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 4 No 2 (2022): Jurnal Teknologi dan Riset Terapan (JATRA) - December 2022
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v4i2.4875

Abstract

Dalam proses pengangkatan produk benda yang berukuran tinggi dan memiliki berat benda yang sangat besar, diperlukan alat bantu yang bisa mengatasi pengangkatan. Spreader beam adalah alat bantu yang berfungsi sebagai pembantu pengangkatan beban dan memberikan keseimbangan. Hal ini perlu diperhatikan pada spreader beam, agar beban yang diangkat tidak melebihi kapasitas maksimum kekuatan materialnya. Oleh karena itu diperlukan kekuatan struktur dari desain spreader bar yang akan dipergunakan untuk lifting maupun crane. Desain produk memberikan gambaran proses benda dan bentuk ukuran yang berfungsi sebagai informasi saat penggambaran desain. Dengan memiliki perangkat pengerjaan sudah lebih modern pada produktivitas yang menggunakan mesin hingga kegiatan yang berbasis software. Pembuatan desain modelling menggunakan software SolidWorks. Pemodelan SolidWorks pada pengujian serta pemberian beban dengan variasi yang berbeda mengungkapkan bahwa spreader beam mencapai titik maksimum pada berat beban variasi 60 ton dengan mengalami tegangan (stress) maksimal 1,903 + 08 dan perpindahan (displacement) maksimal 0,77 mm; serta faktor keamanan (factor of safety) maksimal dengan nilai 1,2. Terlihat juga variasi pembebanan 60 Ton terdapat area yang mengalami displacement yang dapat menimbulkan kegetasan pada suatu saat pengangkatan. Hal tersebut bisa diatasi dengan menambahkan 4 plate support tambahan sebagai patokan untuk menahan titik tumpuan. Dengan adanya tambahan 4 Plate support tentu tidak mempengaruhi nilai dari kekuatan maksimum (yield strength) berkurang.
Pengujian Korosi Intergranular Pada Material UNS 06625 Sesuai Standar ASTM G-28 Ganesha Aryadi; Ari Wibowo; Cahyo Budi Nugroho; Adhe Aryswan
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 4 No 2 (2022): Jurnal Teknologi dan Riset Terapan (JATRA) - December 2022
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v4i2.4930

Abstract

Oil and gas companies are the largest users of steel pipes to produce oil and gas products from the mining, processing and distribution of ready-to-use oil and gas. Steel pipes used in the oil and gas industry can reach tens to thousands of kilometers with many welded joints every few meters. The possibility of corrosion on steel pipes is very large, so a corrosion-resistant coating is needed. Inconel material is often used as a coating material for the inside of steel pipes which is done by cladding welding. In this research, intergranular corrosion testing of the Inconel material layer as a result of cladding welding was carried out on steel pipes with filler metal UNS N06625 to determine the material's susceptibility to corrosion caused by the flow of oil and gas fluid in the pipe. The filler metals used were Ra***tna 625 and Nov***etal 625. Intergranular corrosion testing was carried out using ASTM G-28 standards. The results of the intergranular corrosion test showed that the cladding layer used filler metal for the Ra***tna 625 and Nov***etal 625 brands. No intergranular corrosion was observed, but there was uniform corrosion on the Ra***tna 625 brand with a corrosion rate of 0.46 mm/ year and 0.50 mm/year on the brand Nov***etal 625.
Pengaruh Proses Stress Relieving Terhadap Nilai Kekerasan Nilai Kekerasan Pipa Setelah Proses Swaging Rivaldo Rimo; Nurul Laili Arifin; Tian Havwini
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 4 No 2 (2022): Jurnal Teknologi dan Riset Terapan (JATRA) - December 2022
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v4i2.4951

Abstract

Stress relieving is a heat treatment process that aims to eliminate stress on the end of the material that has been deformed, either internal deformation (swaging) or external deformation (expanding). This treatment aims to eliminate residual stress or residual hardness resulting from the end-sizing process and restore the stress level in the pipe due to the swaging process by heating the material according to the temperature and formation of the material itself. While swaging is a forging process on the pipe cylinder to reduce the end of the pipe, as well as forming the end of the pipe according to the request of the customer, both internal and external deformation processes. This study aims to compare the hardness value of pipe material in non-swaging, swaging, and swaging + stress relieving treatments. This test uses carbon steel material grade L80 pipe size 3 ½ inches with a pipe length of 6 ft. The pressure applied during swaging was 2,850 psi for 30 seconds, with a swage stroke value of 118.00 mm. While the stress-relieving treatment is given heating in the temperature range of 595oC – 625oC with a soaking time of 60 seconds. Of the three treatments, the highest hardness was obtained from the swaging process with a value of 19.2 HRC while the lowest hardness was shown by the non-swaging specimen with a value of 16.7 HRC.
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.

Page 6 of 9 | Total Record : 85

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