HIDAYAT, MUHAMMAD NAUFAL (2021) ANALISIS TEGANGAN PIPA PADA SISTEM PERPIPAAN STRIPPER REBOILER MENUJU AMINE STRIPPER COLUMN MENGGUNAKAN METODE NUMERIK. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
The design of good and safe piping system design is needed to ensure the continuity of the process and the life time of the piping system. Fluid flows from the Amine stripper column to the stripper reboiler at an operating temperature of 134 oC with a design temperature of 170 oC. When operating the piping system will receive both static loads (sustain load) and thermal expansion load which results in a change in voltage along the piping system. Stress analysis is performed using a sustained load consisting of axial stress, bending stress, circumferential stress and load analysis is carried out by sustained load, occasional load, and thermal load. The analysis was performed using a simple beam formula mathematical calculation method and Caesar II software based on ASME Code B31.3 with a pipe thickness of 4.78 mm and a distance between the supports of 6.1 m. The results of mathematical calculations show that the stress due to fixed loads at node 210-220 is 22,4 MPa, the stress due to thermal loads is 23,4 MPa / m2 and the stress due to occupational loads is 9,4 MPa. The results of the calculation of stress due to fixed loads using a simulation of 12,7 MPa with allowable stresses of 112 MPa, stress due to thermal loads of 31,9MPa with allowable stress of 273MPa and stress due to occupational loads of 13,2 MPa , with an allowable stress of 150 MPa. Based on this value, the pipe is declared safe because the results of mathematical calculations and simulations are still below the permit stress. Keyword : Amine Stripper Column, Stripper Reboiler, ASME B31.3, Software CAESAR II, Stress Analysis, Sustained Load, Thermal Expansion Load Perancangan sistem perpipaan yang baik dan aman sangat dibutuhkan untuk menjamin kelangsungan dari proses dan life time dari sistem perpipaan. Fluida mengalir dari Amine stripper column menuju Stripper reboiler pada temperatur operasi 134 oC dengan temperatur desain 170 oC. Pada saat beroperasi sistem perpipaan akan menerima beban baik itu beban statik (sustain load) dan beban termal (thermal expansion load) yang mengakibatkan perubahan tegangan di sepanjang sistem perpipaan. Analisa tegangan dilakukan menggunakan beban tetap (sustained load) yang terdiri dari tegangan axial, tegangan tekuk, tegangan sirkumferensial dan analisa beban dilakukan sustained load, occasional load, dan thermal load. Analisa yang dilakukan menggunakan metode perhitungan matematis simple beam formula dan software Caesar II berdasarkan ASME Code B31.3 dengan ketebalan pipa 4,78 mm dan jarak antar penyangga 6,1 m. Hasil perhitungan matematis menunjukan tegangan akibat beban tetap pada node 210-220 sebesar 22,4 MPa, tegangan akibat beban termal sebesar 23,4 MPa dan tegangan akibat beban okasional sebesar 9,4 MPa. Hasil perhitungan tegangan akibat beban tetap menggunakan simulasi sebesar 12,7 MPa dengan allowable strees 112 MPa, tegangan akibat beban termal sebesar 31,9 MPa dengan allowable stress 273 MPa dan tegangan akibat beban okasional sebesar 13,2 MPa dengan allowable stress 150 MPa. Berdasarkan nilai tersebut pipa tersebut dinyatakan aman karena hasil perhitungan matematis dan simulasi masih dibawah tegangan izin. Kata Kunci : Amine Stripper Column, Stripper Reboiler, ASME B31.3, perangkat lunak CAESAR II, Stress Analysis, Sustained Load, Thermal Expansion Load
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