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All Journal Industrial and Systems Engineering Assessment Journal (INASEA) JTM-ITI (Jurnal Teknik Mesin ITI)
Maradu Sibarani
Pusat Teknologi Bahan Bakar Nuklir (PTBBN), BATAN Kawasan Puspiptek-Tangerang Selatan 15314, Banten
Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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EVALUASI KEKUATAN DAN STRUKTUR MIKRO SAMBUNGAN LAS TIG PADA PIPA ZIRCONIUM Bandriyana, B.; Sibarani, Maradu
Industrial and Systems Engineering Assessment Journal (INASEA) Vol 11, No 1 (2010): INASEA Vol. 11 No. 1
Publisher : Industrial and Systems Engineering Assessment Journal (INASEA)

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Abstract

Welded joints of the zirconium pipe were widely used in the chemical industry or nuclear facility because their high mechanical properties and high corrosion resistance of zirconium material. To improve the mechanical properties of welded joint a method of TIG (Tungsten Inert Gas) welding with a suitable welding parameters were necessary used. Evaluation of strength and microstructure of the welded joint will be used to improve the quality, strength and process technology. This paper described the evaluation of the hardness, strength and microstructure of the TIG welded joint of Zircalloy- 2 pipe. The welding was done for two kinds of samples using the welding machine of the M80-3 model of the TIG (Tungsten Inert Gas) type, with the welding current of 30 and 35 Ampere/ second respectively. The hardness test was done by using the Vickers hardness scale. Testing of welded joint strength was carried out using the hydrostatic test by measured the change of pipe diameters and observed the pipe brake according to the internal pressure of 100, 200, 400 and 425 bars given into the pipe, and the microstructure test was observed by using the optical microscope. The hardness test showed that the maximum hardness number of 203 VHN was occurred at the heat affected zone (HAZ) area obtained. The result of hydrostatic test showed that there was not a change on the dimensions in the welded area up to internal pressure test of 400 bars.
Analisa Teknis Dan Biaya Penggunaan Bahan Bakar Cangkang Kelapa Sawit Dan Batu Bara Pada Boiler DZL4 Di PT. Lautan Luas Tbk. Hartanto, Laili Budi; Sibarani, Maradu; Tuapetel, Jones Victor
JTM-ITI (Jurnal Teknik Mesin ITI) Vol 4, No 1 (2020): Jurnal Teknik Mesin ITI
Publisher : Institut Teknologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (983.958 KB) | DOI: 10.31543/jtm.v4i1.301

Abstract

Abstrak               Boiler DZL4 dengan tipe solid fuel dioperasikan di PT. Lautan Luas Tbk untuk proses reaksi kimia. Penelitian ini bertujuan untuk menganalisa jumlah kebutuhan dan biaya untuk bahan bakar batu bara jenis bituminus dan cangkang sawit. Variabel bebas adalah kapasitas boiler 2,5 ton/jam, 3 ton/jam, 4 ton/jam. Variabel konstan adalah tekanan steam 1,25 MPa, temperatur steam 194ºC, temperature air umpan 75°C pada tekanan 0,15 MPa, efisiensi boiler 78,8%. Metode penelitian adalah dengan menghitung kebutuhan kalor boiler, kebutuhan bahan bakar, jumlah biaya untuk setiap jenis bahan bakar dilanjutkan dengan analisa. Hasil perhitungan kalor boiler kapasitas 2,5 ton/jam, 3 ton/jam, 4 ton/jam berturut-turut adalah 1.482.476 kkal/jam, 1.778.972 kkal/jam, 2.371.962 kkal/jam. Kebutuhan bahan bakar batu bara dan cangkang sawit per jam berturut-turut sebesar 304 kg, 364 kg, 483 kg dan 430 kg, 511 kg, 681 kg. Biaya untuk batu bara dan cangkang sawit per jam berturut-turut adalah Rp350.000, Rp419.000, Rp555.500, dan Rp365.500, Rp435.500, Rp579.000.Kata kunci: boiler, solid fuel, cangkang sawit, batu bara, biayaAbstract                The Boiler DZL4 with solid fuel type are operated in PT. Lautan Luas Tbk for chemical reaction processes. The purpose of this research is to analize the amount of use and costs between palm kernel shell and bituminous type of coal. The independent variables are boiler capacity of 2,5 tons/hour, 3 tons/hour and 4 tons/hour. The constant variable is steam pressure 1,25 MPa, steam temperature 194ºC, feed water temperature 75°C at 0,15 MPa pressure and boiler efficiency 78,8%. The research method is to calculate the boiler heat requirements, amount of fuel needs, the costs for each type of fuel then continue the analysis. The results of heating boiler calculations for capacity of 2,5 tons/hour, 3 tons/hour and 4 tons/hour respectively are 1.482.476 kcal/hour, 1.778.972 kcal/hour, 2.371.962 kcal/hour. The fuel consumption of coal and palm kernel shells per hour respectively are 304 kg, 364kg, 483 kg, and 430 kg, 511 kg, 681 kg. The cost for coal and palm kernel shells per hour respectively are Rp350.000, Rp419.000, Rp555.500, and Rp365.500, Rp435.500, Rp579.000.Keywords: boiler, solid fuel, palm kernel shell, coal, cost
Co-Authors B. Bandriyana Hartanto, Laili Budi Jones Victor Tuapetel