Taylor-Wharton High Capacity GST Storage Tanks - Manual (Page 19)

19
NOTE: The tank was pressurized at the factory with nitrogen gas. Before the tank is
to be filled with any product, it must be purged with product until analysis
indicates an acceptable purity. Use the steps outlined in the Purge Procedure
section above as a guide.
4.
Open TANK BLOWDOWN VALVE and TRYCOCK VALVE. Vent tank pressure to
about 5 psig (0.34 bar/34 kPa). Close the TANK BLOWDOWN VALVE but leave the
TRYCOCK VALVE open.
5.
Fully open TOP FILL VALVE and PRESSURE BUILDING ISOLATION VALVE to fill
tank as rapidly as possible.
6.
Monitor tank pressure on tank PRESSURE GAUGE, INNER VESSEL. If tank pressure
rises to within 90% of tank PRESSURE RELIEF VALVES setting, close tank TOP FILL
VALVE and stop fill immediately. Open TANK BLOWDOWN VALVE and vent tank
pressure to at least 50 psig (3.45 bar/345 kPa) below TANK PRESSURE RELIEF VALVE
set point. Close the TANK BLOWDOWN VALVE. Open tank TOP FILL VALVE and
resume filling.
7.
When liquid spurts from tank TRYCOCK VALVE, close supply source valve to stop fill.
Close tank TRYCOCK VALVE.
8.
When residual liquid in the fill hose vaporizes, close tank TOP FILL VALVE.
CAUTION: To avoid injury, do not touch fill hose or connections with bare hands.
During filling, these parts are cooled to extremely low temperatures.
9.
Open FILL LINE DRAIN VALVE to relieve fill hose pressure. Close FILL LINE DRAIN
VALVE.
10.
When pressure is released disconnect fill hose.
11.
Close valve PRESSURE BUILDING ISOLATION VALVE.
FILLING A COLD TANK
Perform the following steps to fill a tank containing liquid product or one that has been recently
emptied, but still cold.
NOTE: Make certain the TOP and BOTTOM FILL VALVES are closed.
1.
Check the name of the contents on the supply source against the product name on the tank
to be sure that proper product is being transferred into the tank.
2.
Connect supply source fill hose to tank FILL CONNECTION. Make certain connection is
leak tight. Purge fill hose.