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Huka, Graciadiana I
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Industrial & Manufacturing Engineering Mechanical Engineering

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Journal : Journal Mechanical Engineering

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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 VARIASI KAMPUH DAN ARUS LISTRIK LAS PADA MATERIAL BAJA KARBON MENENGAH TERHADAP KEKUATAN TARIK DAN STRUKTUR MIKRO SAMBUNGAN LAS Lasamahu, Stevanno B D; Huka, Graciadiana I; Nanulaitta, Nevada. JM
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aimed to investigate the effects of weld groove variations and welding current on the tensile strength and microstructure of medium carbon steel joints using FCAW (Flux-Cored Arc Welding). The researcher employed a quantitative approach with an experimental method. The specimens used in this research include FCAW with V-groove and 90 A current, FCAW with V-groove and 70 A current, FCAW with X-groove and 70 A current, FCAW with X-groove and 90 A current, raw material specimens, and microstructure specimens. The data analysis reveals that the highest average tensile stress value among the welded specimens was 463.50 MPa, observed in the FCAW X-groove with 90 A current specimen, while the FCAW V-groove with 70 A current specimen showed the lowest value at 295.1 MPa. Regarding the strain values, the FCAW X-groove with 90 A current specimen had the lowest average strain of 4.15%, whereas the FCAW V-groove with 70 A current specimen had the highest at 5.36%. In terms of microstructure, the FCAW V-groove with 70 A current specimen exhibited martensite, pearlite, and ferrite structures in the weld zone, and ferrite and pearlite structures in the heat-affected zone (HAZ) and base metal. For the FCAW X-groove with 90 A current specimen, pearlite and ferrite structures were found in the weld zone, HAZ, and base metal. Keywords: Carbon Steel, Weld Groove, Welding Current, Tensile Test, Microstructure
Co-Authors Kayadoe, Yuliens Anggin Lasamahu, Stevanno B D Lekatompessy, Roy R Loppies, Leslie S. Maitimu, Cindy Gabriel Nanulaitta, Nevada. JM Pellu, Denny Ismail Sanny Hahury, Sanny