Form V372, Rev. 12
- 6 -
12/18, ECN4334
STEP 2
Tie a string to the protractor at the zero point
hole, and attach the other end of this string to the
center of the tank in some manner. This will align
the protractor so that the nozzles can be properly
aimed relative to the center of the tank.
STEP 3
Once the protractor is properly aligned with the
tank, you can proceed to aim the nozzles.
Aim the lower nozzle by aligning the center of the
lower nozzle clamp with the specified degree
mark on the protractor.
See your Nozzle Layout drawing for the proper
angles to set your nozzles.
Moving the lower nozzle will tend to move the
protractor also. Be sure to recheck the zero point
before tightening the lower nozzle clamp.
STEP 4
To aim the upper nozzle, tie the plumb bob string
to the bolt on the nozzle clamp as shown. Make
sure that it hangs from the the center of the
nozzle.
Loosen the clamp on the vertical pipe below the
nozzle, and spread it slightly so that the elbow
can rotate, but not so much that the nozzle could
fall.
The picture shows a sling holding the nozzle for
security. If a crane is not available, just make sure
that the nozzle can't fall.
