Hasil Pencarian  ::  Simpan CSV :: Kembali

Abstrak :
Engineering design calculations for tank bottom sections, including direct current requirements and voltage calculations, followed by additional structures, such as electrical grounding systems, have already been successfully implemented and controlled in field conditions. Furthermore, the effect of soil resistivity in layers, oxygen content and the pH value of the soil against the disproportionate IR-Drop voltage, including its effect on potential distribution, have been already successfully observed. Other influences, such as the depth and location of the anode groundbed determination along with the establishment of impressed current cathodic protection related to the main tools and equipment, such as external corrosion control methods, have been defined as the most effective ways in order to control potential distribution against the additional structures. Persuant to the verification results from the site located at Marangkayu, East Borneo, it has been determined that high soil resistivity could cause error readings in accordance with the accumulation results of the true readings and the IR-Drop voltage, since under real conditions, the tank structure would have received less current flow from an anode compared to a lower result. Naturally, a low pH value from the soil would decrease soil resistivity and enhance potential distribution from the anodes to the tank structures. The results show that the cathodic protection required 10 additional anodes, (each one is of a tubular mixed metal oxide) with a DC supply at minimum amperage of 154 Amps and a minimum voltage supply of 32 Volts. During the research, it was identified that high soil resistivity above 3000 ohm-cm would cause error readings. Naturally, acidic soil is in the region of pH 5-7 value, which would decrease soil resistivity and enhance the potential distribution from the anode to the tank structure.

Abstrak :
Penentuan desain sistem Impressed Current Cathodic Protection di bagian dasar tanki T-1301 A/B/C/D dan AB Rerun Tank di PT XX Kalimantan Timur yang meliputi proses perhitungan kebutuhan arus dan jumlah tegangan DC keseluruhan sistem struktur serta pengaruh penambahan struktur lain yang meliputi electrical grounding system telah berhasil dilakukan dan secara efektif telah dikontrol di lapangan. Selain proses desain engineering, variasi lapisan tahanan tanah terhadap ketidakseimbangan IR Drop pada sistem Impressed Current Cathodic Protection di bagian dasar tanki T-1301 A/B/C/D dan AB Rerun Tank di PT XX Kalimantan Timur dan pengaruhnya terhadap distribusi potensial telah dipelajari. Dari hasil pembuktian di lapangan menunjukkan bahwa dibutuhkan 10 anoda tambahan dengan total kebutuhan arus DC 154 Ampere dan kebutuhan tegangan DC 32 Volt , selain itu tahanan tanah yang tinggi diatas 3000 ohm cm akan menyebabkan pembacaan error yang tinggi.pH tanah yang rendah berkisar 5-7 akan mengurangi tahanan tanah, dan meningkatkan distribusi arus proteksi katodik.

---

Engineering design calculation for bottom section of T-1301 A/B/C/D dan AB Rerun Tank at PT XX Santan Terminal including current requirement and DC voltage calculation followed by additional structure such electrical grounding system has been already successfully implemented and controlled at field. Furthermore, effect of soil layer resistivity and pH of soil against disproportion of IR Drop voltage including its effect to potential distribution has been already successfully observed. Another influences such depth and location of anode groundbed determination along with establishment of impressed current cathodic protection main tools and equipments as external corrosion control method has been defined as the most effective way for controlling potential distribution against structure. As per verification results from site, the results showed that the cathodic protection required 10 additional anode (MMO), with minimum amperage DC supply is 154 A, minimum voltage supplied is 32 Volt, it has been identified that high soil resistivity above 3000 ohm.cm would cause error reading. Naturally, acid soil in about pH 5-7, would decrease soil resistivity and enhanced potential distribution from anode to tank structure.