126 Oxygen-Enhanced Combustion
7.6.2.2 Procedure
1. If there is a significant amount of moisture
in the piping, a quantity of clay propelled by
the gas under pressure is sent through the
piping.
2. After the pipe section is dried by the clay, a con-
trolled quantity of abrasive material is aspirated
into the piping by the propellant gas. The quan-
tity of abrasive material injected into the pipe
depends on the diameter, length, and the interior
condition of the piping.
3. This cleaning procedure is a batch-type process
and should be repeated until the desired stan-
dard of cleanliness is achieved.
4. If any mill varnish exists in any of the piping, it
should be removed with an appropriate solvent
before the sandblasting begins.
5. Minimum ...