ANALISA KEKUATAN PIPA DARI PENGARUH PRESSURE SURGING GATE VALVE PADA MAIN PIPE DI AREA POMPA FIRE WATER SYSTEM PROYEK BANYU URIP BOJONEGORO

PIPE STRENGTH ANALYSIS toward THE EFFECT OF PRESSURE SURGING GATE VALVE OF THE MAIN PIPE at THE PUMP AREA of FIRE WATER SYSTEM, BANYU URIP PROJECT BOJONEGORO

Faishal Khairul Umam (6811040034)


Abstrak

ABSTRAK Pressure surging adalah kondisi dimana terjadinya perubahan velocity dan tekanan dikarenakan pengaruh dari timing penutupan valve dan skenario dari pengoperasian pompa. Pada penelitian ini dilakukan pada sistem fire water di main pipe, karena fire water system sebagai syarat proses beroperasinya suatu plant. Agar tidak terjadi kegagalan, sehingga perlu dilakukan analisa kekuatan pada pipa saat valve 1 menutup secara mendadak. Pada penulisan ini beban pressure surging dengan beban total pada sistem dibandingkan dengan maximum allowable working pressure (MAWP) pipa berdasarkan ASME B31.3. Selain kekuatan dari pipa komponen lain juga dipertimbangkan yaitu flange dan dan valve berdasarkan penggunaan pressure class yang terpakai. Hasil dari perhitungan bahwa beban pressure total dengan pressure surging 43,869 bar lebih kecil dibanding dengan MAWP pipa 65,874 bar jadi pipa mampu menahan beban pressure total. Tetapi ada komponen lain yang juga dipertimbangkan yaitu flange dan valve dengan pressure class 150, berdasarkan ASME B16.34 memiliki maksimal beban pressure 19,6 bar. Sehingga tidak mampu menahan beban pressure jadi harus menaikkan pressure class ke rating 300 dengan beban maksimal 51,1 bar. Kata kunci : fire water system, pressure surging, ASME B31.3, pressure class, ASME B16.34


Abstract

-ABSTRACT Pressure surging is a condition where the velocity and pressure alter due to the influence of valve closing timing and pipe operating scenario. The present study investigates it on the fire water system in the main pipe since the system is required to operate a plant. Analysing the power of the pipe when the valve 1 suddenly closes is highly necessary to avoid any failure. In this study, the pressure surging and the total pressure in the system are compared with the Maximum Allowable Working Pressure (MAWP) of the pipe based on ASME B31.3. In addition to the strength of the pipe, the researcher also considers other components, such as flange and valve based on the used pressure class. The results showed that the total pressure mass and the pressure surging were 43.869 bar fewer than the pipe?s MAWP (65.874 bar), so the pipe was able to take the total pressure. Furthermore, the researcher still considered the other components, i.e. flange and valve, with the pressure class 150 based on ASME B16,34 has the maximum pressure, i.e. 19.6 bar. Consequently, it could not endure to take all the pressure mass, so the researcher had to increase the pressure class up to 300 rates by the maximum pressure 51.1 bar. Keyword : fire water system, pressure surging, ASME B31.3, pressure class, ASME B16.34


Detil Peneliti

Dosen Pembimbing 1 :Emie Santoso
Dosen Pembimbing 2 : Heroe Poernomo

Program Studi : D4 - TEKNIK PERPIPAAN
Angkatan : 2011


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