|
| |
TM 10-3835-231-13
t.
Commissioning. When all the equipment and systems have been installed, serviced, and inspected, the TPT is
ready for commissioning. The term commissioning is meant to include purging air and initial line filling. Commissioning is
not intended to include a complete fill of the storage tanks. The recommended steps to be taken are as follows:
(1)
If the facility has just been completed and given a thorough inspection, it is not necessary to reinspect it. If,
however, the unit has been in standby, a pre-operating inspection is necessary before commissioning.
(2)
If the unit has been previously pressure tested, an additional pressure test is not necessary. If the pressure
test was made with water, any water not removed in the dry out procedures will be driven to the 5,000 bbl
tanks. Drain off the accumulated water from the tank bottoms.
(3)
If the unit has not been previously pressure tested, and operating management chooses to test with fuel,
this can be accomplished after the hoselines are filled.
(4)
Because of the relatively low and variable feed rates, the preferred source of fuel and entrance pressure for
purging the system is from tanker-trucks. The pipeline can be used if tanker-trucks are not available.
WARNING
VENT GASES DURING PURGE
The vent gases during purging operations may be a flammable mixture of fuel
vapors and air. Special precautions to eliminate ignition sources in the area must
be taken.
NOTE
The process of removing air from the system will cause a relatively high venting rate from
the tank vents. The vent gas is likely to be flammable due to mixing with fuel vapors and
droplets. Special precautions must be taken due to this condition.
(5)
Purging. Remove air and contaminants from system.
CAUTION
INTERNAL DIRT AND WASTE
Internal dirt, rocks, construction waste, etc. can ruin operating equipment and
cause operating failures. Eliminate such contaminants before commencing
operations.
(6)
A small amount of contaminants are expected and will be flushed from the system during normal purging
operations. If a section of the system is excessively contaminated, it is recommended that this section must
be disconnected and cleaned before purging operations commence.
NOTE
Restrict flow rates to under 200 gpm maximum during purging and line fill
operations. High and turbulent rates will mix air with the fuel and extend the
purging procedure. Low rates will also discourage the generation of static
electrical charges.
(7)
It is recommended that purging and initial line fill operations take place at flow rates between 50 and 200
gpm. Pressures should not exceed that required to attain these flow rates,
2-53
|
