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Journal Mechanical Engineering
Published by Politeknik Negeri Ambon
ISSN : -     EISSN : 29884977     DOI : https://doi.org/10.31959
Core Subject : Engineering,
Industrial & Manufacturing Engineering Mechanical Engineering
Manufaktur, Perawatan, Otomotif, Teknik Produksi Migas dan Teknologi Rekayasa Sistem Mekanikal Migas
Arjuna Subject : Teknik (semua kategori) - Mekanik Material
Articles 108 Documents
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Evaluasi Kinerja Insulasi Pipa Uap Panas Fire Tube Boiler Pada Industri Kilang Minyak Dan Gas Siahaya, Delsi Natalia; Hatuwe, Azmain. N.; Malakauseya, Jeffrie J
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2916

Abstract

The steam pipe fuctions as a conduit for hot steam from the boiler to other unit. During the transport process in the pipe, it is expected that heat loss from the steam in minumized, so that the required on the steam pipe unit in need. Therefore, hot pipes need to be insulated. In this study, the insulation on the steam pipe is mae of rock wool with a thickness of 7,5 cm. After a long period of operation, it is necessary to evaluate the insulation perfomance in retaining the rate of heat loss. The method used in this research in theoretical review, where the data is obtained from field observations and then analyzed using equations from supporting references. From the discussion results, it is found heat loss in the pipe occurs through conduction and convection, also influenced by variations in ambient temperature. The average total heat loss is 15,715.90 Watts. The percentage of heat loss compared to the total steam transported through the pipe is 0,3376% on average, and the insulation perfomance in preventing heat loss is considered still effective. Keywords: Insulation,Boiler, Steam pipe,Refinery.
ANALISIS LAJU KOROSI DAN SISA UMUR PAKAI PADA TANGKI TIMBUN BAHAN BAKAR DI PLTD HARUKU Marasabessy, Salman; Karyani, M.Said; Lilipaly, Eka R. M. A. P.
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2917

Abstract

Corrosion resistance is the most important criterion in determining both the service life (remaining life) and operational reliability of equipment in the oil and gas industry. So it is very important to monitor the performance of every equipment in this industry. As with storage tanks, during long periods of operation and use, performance will likely decrease or could be said to experience thinning, thereby posing a danger to the thickness and remaining life of the ultrasonic thickness measuring instrument. differences in steel thickness data from the beginning and the thickness carried out by researchers. The data collected is also data that determines the minimum value for steel thickness in order to calculate the useful life of the media that will be examined by tanks that carry out measurements and maintenance using API 653 standards. Take measurements at several points 1. From the results of the analysis of the 100KL Tank located at PLTD HARUKU Using the UTG-90 Ultrasonic Thickness Gauge tool for plate thickness in August 2024, the results were that for Course 1 3.3, Course 2 3.4, Course 3 4.1, and Course 4 4.0 and the remaining tank life for each -Course 1, Course 2, Course 3 and Course 4 respectively are 11.26 years, 11.86 years, 32 years, 27.8 years1. The 100KL tank needs to undergo a Remaining Life Assessment (RLA) in 2028 and a regular tank inspection routine must be carried out to prevent leaks in the tank at least once every 4 years. Keywords : Tangki, corrosion, remaining life, tank thickness
ANALISA TEORITIS HASIL PENGENDALIAN KOROSI PADA INSTALASI PIPA MINYAK DI PERUSAHAAN X Waworundeng, Tierza Yulia; Tuny, Samuel M. J. S.; Pelasula, Berthy
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2918

Abstract

Corrosion in oil pipelines is a frequent problem in the upstream oil and gas industry, reducing the strength of the structure to withstand fluid pressure and causing severe damage that cannot be repaired. This study aims to determine the factors that cause corrosion, apply the coating method as corrosion control, and conduct a comparative analysis of the corrosion control methods used in the oil piping system. The results of the analysis show that environmental conditions affect the type of material to be used. The use of the right pipe material such as stainless steel or API 5L steel can help in the selection of corrosion control methods, one of which is the coating method. Thus, this research helps to improve the operational efficiency of oil pipeline installations, reduce damage, and extend the service life of pipelines. In addition, this study also aims to compare the effectiveness of the corrosion control methods applied and the materials used, so that it can provide the right recommendations to control corrosion in oil pipes using an effective coating method.
EVALUASI KINERJA CARGO OIL STRIPPING PUMP TYPE BORNEMANN TWIN SCREW 2HM4200-100 DI KAPAL MT. NONI T Kayadoe, Yuliens Anggin; Lekatompessy, Roy R; Huka, Graciadiana I; Hahury, Sanny
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2919

Abstract

Evaluation of the performance of cargo oil stripping pumps on the Mt. Noni T ship is needed for smooth loading and unloading of avtur at PT Pertamina Prata Niaga Integrated Wayame Ambon. Pumps that operate continuously will experience a decrease in work. This can be caused by several factors, namely the age of the pump, and the level of roughness of the pipe that causes an increase in head loss. The purpose of this study is to evaluate the performance of cargo oil stripping pumps on the MT. Noni T. The method carried out in the study uses a quantitative method with 2 variables. The independent variable is the input power and output power of the pump while the bound variable is the efficiency of the pump. The data obtained consisted of primary data and secondary data. The methods used when collecting data are interview, observation, and documentation methods. The result of this study is that there is a decrease in pump efficiency which was initially 100% to 80% influenced by the life of the pump and its operating time. Suggestions that can be given are Conducting periodic inspections of the pump to prevent damage that may occur in the future and Conducting inspections of the pump drive motor so that the pump works properly.Keywords: Screw, pump, efficiency, tanker, Flow.
ANALISA LAJU KOROSI PIPA SCH 40 SEAMLESS DENGAN VARIASI MEDIA PENGKOROSIAN AIR PAYAU DAN AIR LAUT Maitimu, Cindy Gabriel; Loppies, Leslie S.; Pellu, Denny Ismail; Huka, Graciadiana I
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2920

Abstract

Metals, especially steel, are widely used in various industrial applications due to their strength and durability. However, corrosion is a significant drawback that can shorten the life of the material. This research aims to analyze the corrosion rate of SCH 40 seamless pipes with a variety of corrosion media: brackish water, sea water, aquadess, NaCl solution, and oxygen, in conditions without paint coating and with paint coating. The research method uses the weight loss method according to the ASTM G102-89 standard, where the corrosion rate is measured in millimeters per year (mmpy) by calculating the difference in pipe weight before and after immersion. The results show that the corrosion rate without paint coating is: brackish water 0.00016 mmpy, sea water 0.00014 mmpy, aquadess 0.00016 mmpy, NaCl 0.00015 mmpy, and oxygen 0.0000045 mmpy. Seawater showed the lowest corrosion rate, possibly due to the formation of a passive protective layer. Oxygen had the lowest corrosion rate, indicating that oxygen alone does not cause significant corrosion without moisture. With paint coating, the pipe corrosion rate becomes: brackish water 0.00000125 mmpy, sea water 0.00000125 mmpy, aquadess 0.00000268 mmpy, NaCl 0.00000107 mmpy, and oxygen 0.00000125 mmpy. The use of paint coatings significantly reduces the rate of corrosion, especially in corrosive media such as brackish water, sea water and salt solutions. These results emphasize the importance of paint coatings to extend the service life of pipes by reducing the speed of corrosion. Key words: corrosion, seamless pipe, paint coating, corrosion media, corrosion rate, weight loss method
ANALISA LAJU KOROSI PADA SAMBUNGAN ELBOW PIPA MINYAK DI PT. PLN ( PERSERO ) ULPLTD POKA Suparman, Widianti; Pelasula, Berthy; Patty, Alexander A.
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2921

Abstract

The oil pipeline network is a critical infrastructure that plays a vital role in the oil and gas industry. However, one of the significant challenges faced by this pipeline system is corrosion. Corrosion is a chemical process that leads to the deterioration of metal quality due to electrochemical reactions with the environment. Corrosion in oil pipelines not only reduces the wall thickness but can also result in leaks, structural damage, and even accidents that negatively impact human safety and the environment.The objective of this research is to analyze the corrosion rate in the elbow joints of oil pipelines at PT PLN (Persero) ULPTD Poka. This study employs a quantitative method involving two variables. The independent variable is the elbow type, specifically the 90° elbow, while the dependent variables are the corrosion rate calculations and the remaining service life (RSL) of the elbow pipes.The results indicate that the corrosion rate varies at each measurement point on the elbow joints. The RSL calculations show significant variation based on the thickness of the pipe wall at each elbow. The highest RSL values were found in elbows 3, 4, 5, and 8, with a remaining service life of up to 49.5 years. Conversely, elbow 1 had the lowest RSL at 38 years. The higher RSL in some elbows suggests that despite experiencing corrosion, the remaining thickness is still sufficient to support the pipeline's function for a longer duration. Recommendations include the need for intensive maintenance on the oil pipeline elbow joints, especially on segments above ground and near corrosive sources. Keywords: Oil Pipeline, Corrosion Elbow Joint, Remaining Service Life (RSL), Maintenance
ANALISIS PERBANDINGAN PENGGUNAAN BIODIESEL B35 DAN B40 TERHADAP KINERJA MOTOR DIESEL DI PLTMG SERAM PEAKER La Idi, Adi Septi; Waas, Kristofol; Talakua, Clay
Journal Mechanical Engineering Vol. 3 No. 3 (2025): DESEMBER
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v3i3.3643

Abstract

This study analyzes the effect of using B35 and B40 blended biodiesel fuels on the performance of a MAN 12V 51/60 DF diesel engine at the Seram Peaker Gas Engine Power Plant (PLTMG). The background for this research is the national mandatory biodiesel policy, which continues to increase its blend ratio. The results show that by using 1 kg of fuel, the B35 blend can produce 12.486 MW of power with a fuel consumption of 0.2100 kg/kWh, an effective thermal efficiency of 20.31%, and a mechanical efficiency of 0.91092. Meanwhile, the B40 blend produces 12.367 MW with a higher fuel consumption of 0.21884 kg/kWh, an effective thermal efficiency of 18.92%, and a mechanical efficiency of 0.887581. These data indicate that increasing the biodiesel content from B35 to B40 tends to decrease the power output and engine efficiency, while fuel consumption increase.  Keywords: Biodiesel, B35, B40, Diesel Engine Performance.
Rancang Bangun Prototipe Heat Exchanger Type Shell and Tube Arah Aliran Searah Hatuwe, Azmain N; Hayoto, Anisa Muhammad; Waas, Kristofol
Journal Mechanical Engineering Vol. 3 No. 3 (2025): DESEMBER
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v3i3.3694

Abstract

This research aims to analyze the design and fabrication of a parallel-flow shell-and-tube heat exchanger prototype. The research was motivated by the need for concrete and effective practical learning media in the Mechanical Engineering Department of Ambon State Polytechnic, which is currently limited to theoretical material. The design method for this device uses a "build and build" approach. This design combines a 6 mm diameter aluminum pipe for the hot fluid tube and a 4 inch diameter galvanized iron pipe as the shell for the cold fluid. The fluid used for the hot and cold sides is water. The mass flow rates applied to the hot and cold fluids are 0.089 kg/s and 0.12572989 kg/s, respectively. The design calculations resulted in the creation of a prototype exchanger with a shell length of 0.5 m, an outer tube diameter of 0.006 m, and 74 aluminum tubes. Leakage testing was conducted using compressed air at 16 psi for 5 minutes. No leaks were found during the test. Keywords : heat exchanger,, shell and tube, parallel flow

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