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Zaki Prawira, Muhammad
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Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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ESTIMASI KEBUTUHAN MATERIAL PADA PERKERJAAN REPARASI DI PT. MULTI OCEAN SHIPYARD Tyas Adi, Fajar; Saputra; Dasira, Alyuan; Zaki Prawira, Muhammad; Pradana Putra, Andrew
JURNAL JALASENA Vol. 5 No. 2 (2024): FEBRUARI 2024
Publisher : Fakultas Sains dan Teknologi Universitas Karimun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51742/jalasena.v5i2.1249

Abstract

Material Needs Estimation The plate used in the ship repair process is a major requirement of raw material supporting the shipping industry. We know that the amount of material is never right in a development, which often happens to be inadequate and has an impact on the disruption of a production process. The situation is inadequate to a need that the production process is obstructed or runs smoothly, excessive raw material procurement can cause high storage costs and investment in raw material supplies. Material is a construction project that covers 40-60% of the cost to be issued by the company. In this paper, an analysis of the material needs of PT. Multi Ocean Shipyard. So get results for MT. FORTUNE PASIFIC-XLIX can be known as ton of 20354.3kg. To reduce the set-up, and lead time costs and maximize operational efficiency and also inventory investment can be suppressed as low as possible. By using the MRP (Material Requirement Planning) method, it is possible to calculate the amount, cost and time of the MRP Form to know the order, volume and tonnage time. Keywords: Material Management, MRP, Ship Repair, Management System
DESAIN PADEYE UNTUK PROSES PENGANGKATAN STRUKTUR PROCESS DECK (PD-1) PADA PROYEK JANGKRIK FLOATING PRODUCTION UNIT (FPU) DI PERUSAHAAN PT. SAIPEM KARIMUN YARD Sutrisno, Tri; Susilo, Trisno; Hilmy, Zakwan; Tyas Adi, Fajar; Dasira, Alyuan; Zaki Prawira, Muhammad; Pradana Putra, Andrew
JURNAL JALASENA Vol. 6 No. 1 (2024): AGUSTUS 2024
Publisher : Fakultas Sains dan Teknologi Universitas Karimun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51742/jalasena.v6i1.1382

Abstract

Padeye is an object shaped semicircle that made of metal and welded to a profile. The top priority in lifting process is the safety of the structure to be lifted. The structure must not suffer damage or overstress during the lifting process. This causes in mendesai padeye must bethrough careful calculation so that the resulting design is in accordance with the load to be lifted that will be lifted. This research uses a quantitative method by using design calculations and loading on the padeye design. The results research shows that the padeye design for a 100-ton load plan with dimensions Length 360mm, Width 260 and Height 400mm has a stress below the allowable stress so it is safe to use so it is safe to use.
PENGARUH HEATING TORCH TERHADAP TEMPERATURE DARI PERMUKAAN PLAT TEBAL 8 mm GRADE AH36 DENGAN PLAT 16 mm GRADE AH36 Sumarsono Patti, Tito; Dasira, Alyuan; Zaki Prawira, Muhammad; Pradana Putra, Andrew
JURNAL JALASENA Vol. 6 No. 1 (2024): AGUSTUS 2024
Publisher : Fakultas Sains dan Teknologi Universitas Karimun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51742/jalasena.v6i1.1390

Abstract

This research aims to determine the effect of heating torch (Preheating) on ​​the surface temperature of 8mm thick plate grade AH36 with 16mm plate grade AH36, namely heating given to the base metal at the right temperature before welding. This research uses preheat temperatures of 80°C, 110°C, 140°C, and 170°C. Temperature is the temperature of a base metal around the area to be welded, namely before welding begins. Each plate sample is placed at a distance and similar heating conditions using a standard heating torch. The research results show that the thicker the plate, the temperature distribution on the surface is more even than the thinner plate, which can cause distortion. Observations were made regarding the time required to reach temperature variations of 80°C, 110°C, 140°C, and 170°C on the surface of the AH36 steel plate. . Plates that are 16mm thick will have a higher heat absorption capacity and take longer to reach the desired 65°/110° temperature. Whereas an 8mm plate may reach the desired temperature faster than a 16mm plate. The difference in plate thickness can also affect the heat distribution generated by the heating torch (burner). The 16mm plate may have better heat spreading ability than the 8mm plate may cause deformation.
Co-Authors Alyuan Dasira Hilmy, Zakwan Pradana Putra, Andrew Saputra Sumarsono Patti, Tito Susilo, Trisno TRI SUTRISNO Tyas Adi, Fajar