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Jamasri .
Fakultas Teknik, Universitas Gadjah Mada, Yogyakarta
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Journal : Jurnal technoscientia

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RELIABILITY-CENTERED MAINTENANCE (RCM) EVALUATION METHOD IN THE INDUSTRY APPLICATION, CASE STUDY: FERTILIZER COMPANY, INDONESIA Khasanah, Rahayu; Dawal, Siti Zawiah Md.; -, Jamasri
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 8 No 1 Agustus 2015
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (420.004 KB) | DOI: 10.34151/technoscientia.v8i1.190

Abstract

Nowadays, Reliability-centered Maintenance (RCM) has become the solution to determine the type of maintenance tasks and inspections needs to be performed to the assets in achieving effective and efficient maintenance. However, implementing RCM is not enough to achieve optimization of maintenance planning. The evaluation, as one of the important point should be done to prove the benefits of RCM and to continuously improve the maintenance planning. In this study, the effects of RCM implementation in the industry application were evaluated, as a step for continuous improvement in RCM application. The case study is an Ammonia plant in a fertilizer company in Indonesia. This research evaluates the RCM effects by investigating and analyzing Downtime Loss and Mean Time between Failures (MTBF). The problems in RCM implementation in the case study also investigate as a basic for giving the recommendation to the company as a way to improve the RCM implementation. In general, the findings from the investigation of case study affirm that RCM implementation do improve the plant performance which are showed by decreasing of Downtime Loss and Mean Time between Failures. The significant problems that become pitfalls in RCM implementation process are about the worker’s culture and understanding on the RCM process. Overall, the study shows that RCM implementation brings many benefits to the company by decreasing the Downtime Loss and Mean Time between Failures which can be resulted as the higher profit for the company.
PENGARUH PENGELASAN FCAW TANPA DAN DENGAN PENAMBAHAN PANAS TERHADAP PERUBAHAN SIFAT MEKANIK DAN STRUKTUR MIKRO SAMBUNGAN LAS Subeki, Nur; -, Jamasri; Ilman, M.N.; Iswanto, P.T.
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 7 No 2 Februari 2015
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (777.254 KB) | DOI: 10.34151/technoscientia.v7i2.204

Abstract

The Welding processes are delivery used joining steel, especially used in civil construction, piping and ship manufacturing. Many of the benefits that can be obtained from welded joint is the joining can be cheap, rapid manufacturing, varied shape and lighter construction. One of the welding techniques that is widely used for joining the steel construction is Flux Core Arc Welding (FCAW). The problem that found in welding joints is the tensile strength in welding area is low and uneven hardness in the weld joint. The aim of this research was to determine the mechanical properties of FCAW Welding process and find out micro structures formed by the addition of heat around the welding.In this research, FCAW welding has been divided into two groups; the ones group is manufacturing without addition of heating, and the second group is manufacturing by heating 200 °C. Every group of manufactures would be test by chemical compositions, macro photos, micro photos, tensile strength and hardness number. The results of this research shows that the addition of heat at 200 °C could be increase the yield strength and ultimate strength. The heating also could be very small impact on the change in the hardness of weld area, but it could be reduce the hardness in HAZ area significantly. Micro structure formed then the weld area has been dominated by acicular ferrite micro structure, grain boundary ferrite dominate in coarse HAZ, the pearlite and ferrite with grain aggrandizement take place in smooth HAZ and base metals.
Co-Authors A. E Tontowi Alva Edy Tontowi Alva Edy Tontowi Alva Tontowi Alva Tontowi, Alva Aris Budiyono Budi Rochardjo, Heru Santosa Dawal, Siti Zawiah Md. Dawal, Siti Zawiah Md. Duskiardi Duskiardi Gunesti Wahyu Handiko H. S Rochardjo Hendri Hestiawan Hendri Hestiawan Hendri Hestiawan Heru Santoso Budi Rochardjo Heru Santoso Budi Rochardjo, Heru Santoso Heru Santoso Budi Rochardjo, Heru Santoso Budi Iswanto, P.T. Iswanto, P.T. Khasanah, Rahayu Kuncoro Diharjo Kusmono Kusnanto Kusnanto Kusnanto Kusnanto M. Waziz Wildan M.N. Ilman M.N. Ilman, M.N. M.W. Wildan M.W. Wildan Mastariyanto Perdana Nur Subeki Orisanto Darma Setiawan R. Soekrisno Riyadi, S Rizky Arman Rochardjo, H. S S Riyadi S. A Widyanto Slamet Widyanto Slamet Widyanto, Slamet Subarmono Subarmono Subarmono Subarmono Sugiarto Suryadima Suryadima Susilo Adi Widyanto Susilo Widyanto Susilo Widyanto, Susilo Sutiarso Sutiarso Tjuk Oerbandono Tontowi, A. E Triyono Triyono Wenny Marthiana Widyanto, S. A Widyanto, Slamet A. Yovial Mahyoedin