Pada 23 Maret .2005 jam 1:20 siang,
di BP Texas City refinery terjadi ledakan dan api yang mengakibatkan 15 orang
meninggal dunia dan menciderai 180 orang dengan kerugian material melebihi $1.5 billion.
Insiden terjadi ketika start-up isomerization unit, raffinate splitter tower
meluap. Pressure relief device terbuka yang menyebabkan flammable fluid keluar
dari blowdown stack yang tidak dilengkapi dengan flare. Keluarnya fluid ini
menyebabkan ledakan dan api. Fatality terjadi di kantor yang dekat lokasinya.
43.000 orang penduduk diperintahkan tetap didalam ruangan dan ledakan
mengakibatkan rumah-rumah dalam radius ¾ mile dari refiney
rusak.
Thursday, July 4, 2013
Wednesday, July 3, 2013
Differential Pressure Level Transmitter Defect
Every liquid in storage tank will have hydrostatic pressure equal to the height of the liquid. With an assumption that the liquid has constant density. The DP level transmitter indication is a measure of the head pressure in the level of the tank whose level is to be detected. Head Pressure, DP, is calculated as DP = (Height).(Specific Gravity).
For example, let's say 50% level is displayed in the control room, the specified SG = 0.8. The DP transmitter is actually measure a differential pressure (50%)*(0.8) = 40 units of the differential pressure.
For example, let's say 50% level is displayed in the control room, the specified SG = 0.8. The DP transmitter is actually measure a differential pressure (50%)*(0.8) = 40 units of the differential pressure.
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