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All Journal Journal Of Chemical Process Engineering (JCPE) Jurnal Kartika Kimia Majalah Ilmiah Pengkajian Industri Jurnal Teknik Journal Of Chemical Process Engineering Journal of Technology and Engineering
Pawawoi, Pawawoi
Teknik Metalurgi, Universitas Jenderal Achmad Yani
Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Journal : Journal of Technology and Engineering

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Influence of Fixed Carbon Carburizer on The Hardness and Microstructure of Cast Iron FC 25 Putra, Adi Ganda; Ghose, Aurobindo; Pawawoi; Sukmara, Sony
Journal of Technology and Engineering Vol 1 No 2 (2023): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v1i2.226

Abstract

Cast iron smelting is carried out with the main materials, namely steel scrap (C) 0.08% and recycled material FC 25 (C) 3.37% so that the mixture of the two raw materials results in the carbon content being less than the FC 25 target which has a content range (C) between 3.10% – 3.40% (JIS G 5501). In order for element (C) to meet the material standardization criteria, a carburizer is used as an addition to element (C) in the smelting process. This research uses an induction furnace with a capacity of 1500 kg for the melting process. Metallographic testing aims to see the comparison of the microstructure that occurs. Brinell hardness testing is carried out by providing 5 point indent traces on the surface. (α) and 2 points in the phase (α+Fe3C). The research results show that the addition of element (C) using a carburizer with a fixed carbon content of 91.57% and 96.7% in casting FC 25 material affects the value of material hardness, phase hardness and microstructure in FC 25 material. The use of carburizers with different contents This does not affect the graphite shape, graphite type and graphite size. The use of a 96.7% carburizer produces a Brinell hardness value of 205 HB, Vickers 259 HV and a pearlite phase percentage of 59% which is higher than a 91.67% carburizer which produces a Brinell hardness value of 184 HB, Vickers 238 HV and a pearlite phase percentage of 56%.
Service Life Assessment and Safety Inspection of Pressure Vessels: A Comprehensive Analysis of Structural Integrity and Performance Putra, Adi Ganda; Putra, Muhammad Prima Andika; Matijanti; Pawawoi
Journal of Technology and Engineering Vol 1 No 2 (2023): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v1i2.232

Abstract

Pressure vessel is a container used to store fluids and is very necessary for various industrial activities. Fluids stored in pressure vessels are fluids that have special characteristics and treatment, such as fluids at low or high temperatures, pressurized fluids and so on. In general, a pressure vessel is a container made of metal. Materials that contain metal will definitely experience corrosion. Corrosion can occur, one of the reasons is because there is a chemical reaction on the metal surface caused by the low pH of the water and humid air, so that the metal becomes thinner over time. This will affect the strength of the metal to withstand pressure. The thinner the metal, the less pressure it can withstand. With corrosion, the pressure vessel's ability to withstand pressure will decrease. If the pressure held is higher than the capacity of the pressure vessel, it can cause work accidents. This research will analyze the service life of pressure vessels using inspection procedures based on Minister of Manpower Regulation Number 37 of 2016 concerning Occupational Safety and Health of Pressure Vessels and Storage Tanks. To calculate the effect of thickness on the pressure of the pressure vessel, it will be based on the formula obtained from ASME sec VIII, div.1 regarding boilers and pressure vessels. The pressure vessel that will be tested is of the Jiangsu Ashun brand at PT. Setia Gas Jaya. From the results of analysis and testing, it shows that the pressure vessels at PT. Setia Gas Jaya has the point that experiences the most corrosion, namely at the bottom-head, which was originally 6.8 mm to 6.62 mm after 2 years and 3 months of operation. The results of the analysis also show that with a working pressure of 3.3 MPa, the pressure vessel can be operational for 13 years 3 months 13 days, or its remaining useful life is 11 years 13 days starting from June 2023.
Co-Authors Achmad Gunawan Achmad Gunawan Adi Ganda Putra Afrianto, Afrianto Ahmad Brian Pratama Ahmad Gunawan Ahmad Gunawan Andhika Abdan Rahmanullah Anugrah B S Anugrah B S Dini Dini Djoko Hadi Prajitno Djoko Hadi Prajitno Djoko Hadi Prajitno Eli Y Eli Y Fera Fera Ghose, Aurobindo Iman Iman Lesmana, Dera Matijanti Mohamad , Vicky Muh. Lutfhi Muh. Lutfhi Pratama, Ahmad Brian Putra, Muhammad Prima Andika Rahmanullah, Andhika Abdan Royen B S Royen B S Selly Septianissa Sukmara, Sony Universitas Mathla ul Anwar