Page 3 of 4 The acceptance criteria for target blows on the fuel
gas line are similar to what is used for target blows of steam
lines, although they are not as stringent. These full pressure
air blows were continued until two sequential good (clean)
targets are achieved. A good target is one with no raised edge
impacts and 3 particles no larger than 1/64? (0.016? or 0.4 mm)
on each target. Results and observations The air compressor used
for the blows was sized at 900 cfm. The air receiver was sized
at 1,000 gallons. Due to noise concerns, air blows were done for
only 11 hours each day, between 7 a.m. and 6 p.m. Air blows were
done without an air dryer for the first three days with little
success. An air dryer sized for 900 cfm was added between the
air compressor and air receiver. The total time to complete the
air blows was 9 days; however, with an air dryer it is believed
that the time could be reduced to 4-5 days. If air blows are
performed around the clock, this duration could be shortened
even more. Eac