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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Jurnal Rekayasa Mesin QARDHUL HASAN: MEDIA PENGABDIAN KEPADA MASYARAKAT Jurnal Elkolind : Jurnal Elektronika dan Otomasi Industri Journal of Welding Technology Jurnal Teknologi dan Riset Terapan (JATRA) Journal of Computer, Electronic, and Telecommunication (COMPLETE) Jurnal Cakrawala Maritim Jurnal Cakrawala Maritim Jurnal Teknologi Maritim
Mochammad Karim Al Amin
Politeknik Perkapalan Negeri Surabaya
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Journal : Journal of Welding Technology

 1 
Comparative analysis of hardness and microstructure of dissimilar welded materials at various welding positions in the fabrication industry Mochammad Karim Al Amin; Ilham Nurcholis; Wiwik Dwi Pratiwi; Dika Anggara; Eriek Wahyu R W
Journal of Welding Technology Vol 4, No 1 (2022): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v4i1.2967

Abstract

304 stainless steel is commonly used in industry due to the advantages of great conductivity, while SS 400 carbon steel is largely used in the various engineering field on purpose of industrial and fabrication. One of examples is penstock application in Tegal, Central Java, has been using more than one kind of dissimilar steel, SUS 304 and SS 400, and the various of welding position (1G, 2G, and 3G). Penstock was flowed water from the river for irrigation and raw water so that could be affected to decrease of the thickness of materials. This research was conducted on the dissimilar welding of SUS 304 and SS 400 by SMAW with the welding process of (1G), (2G), and (3). After the welding process, visual examination, hardness test, and microstructure were conducted to examine the quality of welded and hardness of the root and surface of weld. The visual test was shown that no defect, the highest of hardness was at the weld metal with 3G of welding position at 207.17 HVN (specimen 2B) while the lowest of hardness was 195.13 HVN with 2G position (specimen 2A). The microstructure of weld metal was austenite of white and delta-ferrite of black, delta-ferrite was vermicular.
Critical Path Method (CPM) pada pengerjaan pipeline dan analisis resiko pada pengelasan Febriti Aryan Kumala; Endang Pudji Purwanti; Mochammad Karim Al Amin
Journal of Welding Technology Vol 3, No 1 (2021): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v3i1.2068

Abstract

The pipeline construction project at PT. Gearindo Prakarsa often delays because many activities are not in accordance with the target, this is due to the repair process on welding and lack of manpower in some activities. This results in the actual duration being longer than the planning duration. So it is necessary to control the control through optimizing the schedule and implementation costs as well as risk analysis for the welding process. CPM and crashing methods are one of the methods used in controlling to get a more optimal time and cost duration. Meanwhile, to overcome any improvements made by conducting a risk analysis to determine the risk of defects from safety, environmental and cost factors. If the welding activity does not change the welding process, using the CPM and crashing methods, the optimal time is 59 days by adding 15 workers and costs Rp. 9,001,453. If the overall welding process changes with SMAW or GTAW, by analyzing the increase in consumption costs of Rp. 27,72,000 for the SMAW process and Rp. 44,366,169, for the GTAW process. In terms of the level of risk, porosity defects and incomplete fusion in the SMAW process are at a high risk level for safety, environmental and cost factors. Meanwhile, in the GTAW process, complete fusion defects are at a high risk level for the cost factor.
Pengaruh masukan panas terhadap struktur mikro dan sifat mekanik sambungan pipa 5L X65 dengan proses pengelasan kombinasi STT SMAW Muhamad Iqbal Farhani; M Thoriq Wahyudi; Mochammad Karim Al Amin
Journal of Welding Technology Vol 2, No 2 (2020): Desember
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v2i2.2062

Abstract

Welding with the STT (Surface Tension Transfer) process is the latest innovation from the GTAW (Gas Tungsten Arc Welding) welding process, where STT is commonly used in the open root while the research carried out is the layer at the root and hot pass because it was chosen for the welding process with low heat input. . The research objective was to determine the effect of heat input or heat input of combination welding STT compared to GTAW on macro macro structure and mechanical properties of 5L X65 pipe welding joints. The results of this study compare the STT welding process with GTAW. Testing of the two processes will be assessed from the results of their mechanical properties through tensile and hardness, micro-macro structure and SEM. From the microstructure test and SEM, there is a not too significant effect on the differences in grain shape and content of ferrite acicular and ferrite widmanstatten, especially in the weldmetal area and grain changes in the HAZ area. From the hardness test, the comparison of the results of STT-SMAW, the hardness value is higher but not too significant than the GTAW-SMAW results due to the influence of heat input. The results from the tensile obtained that the STT-SMAW value has higher tensile strength and yield but not too significant compared to GTAW-SMAW, and all welding results still have values that fall into the standard range
Desain tangki timbun external floating roof kapasitas 75000 MT Kevin Satria Nugraha; Muhamad Ari; Mochammad Al Amin Karim Al Amin
Journal of Welding Technology Vol 2, No 2 (2020): Desember
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v2i2.2063

Abstract

Storage tanks are widely used in industry, especially as a storage area for oil and gas mining products. Various types of storage tanks are made based on the pressure, the type of fluid stored and the type of roof used. The roof on the storage tank is divided into a fixed roof, internal floating roof and external floating roof. Floating roof is used as a barrier between the fluid and the empty space in the tank so as to minimize the occurrence of vapor space and the possibility of a fire in the tank. This study discusses the design of an external floating roof storage tank for condensate fluid with a capacity of 75000 metric tons. The design process for the shell course and other parts of the stockpile tank is based on the API 650 standard 12 addendum 2018 edition using the variable design point method. Verification of the results of calculations generated manually is done with finite element software. Manual calculations for the construction of an external floating roof heap tank get the minimum shell plate thickness used is 10 mm. The bottom plate was found to be 8 mm thick. The simulation using finite element software produces the maximum stress values on the shell, shell to bottom, and roof, namely 1.937 MPa, 7,122 MPa, 0.216 MPa, respectively. All stresses that occur are still below the allowable stress of the material. So it can be concluded that the tank construction is still safe
Co-Authors Adhitya, Ryan Yudha Ahmad Putra , Zindhu Maulana Amrullah, Haidar Natsir Annisa , Aulia Rahma Aprilian, Elham Arif Rachman Bachtiar Bachtiar Bachtiar Budi Kurniyanto, Hendri Deny Wibisono Dika Anggara Endang Pudji Purwanti Eriek Wahyu R W Eriek Wahyu Restu Widodo Eriek Widodo Febriti Aryan Kumala Firiambodo, Suthoni Yoga Firmansyah, Moch. Aria Hakim, Achmad Reyhan Fajar Ilham Khoirul Ibad Ilham Nurcholis Imam Khoirul Rohmat Kevin Satria Nugraha Kurniyanto, Hendri Budi Kusminah, Imah Luluk Leonard, Rikky M Thoriq Wahyudi M. Thoriq Wahyudi Ma'ruf, Buana Moch. Aria Firmansyah Moh. Miftachul Munir Moh. Syaiful Amri Mohammad Thoriq Wahyudi Muhamad Ari Muhamad Iqbal Farhani Munir , Mohammad Miftachul Mustaghfirin, Muhammad Anis Mustain, Eko Nisazarifa, Adristi Prastyawan, Rikat Eka Pratama Putra, Mochammad Yudha Aditya Priyambodo Nur Ardi Nugroho Purwanti, Endang Pudji Putera, Erwien Yuliansyah Restu Widodo, Eriek Wahyu Rizki Mubarrok, Muhammad Rohman, Muhammad Yuqal Abi RR. Ella Evrita Hestiandari Ruddianto, Ruddianto Safrudin, Muhammad Ilham Saputro, Dimas Sasongko, Kukilo Edy Septian , Eka Cahya Soelistijono, Rafi Febian Teddy Eka Wijaya Toto, Alvalo Wahyudi, Mohammad Thoriq Wibowo, Alvalo Toto Wiwik Dwi Pratiwi Wiwik Dwi Pratiwi Yaqin , Muhammad Ainul