Removal of all debris from the intended area of assembly or disassembly such as dirt, dust, loose
paint, and grease is mandatory. This includes cleaning the pipe or component which is to be removed
and the adjacent components or piping.
Wipe all of the external surfaces of components and piping with detergent or alcohol solvent to remove
grease or dirt.
All personnel shall have clean hands.
All tools used in the removal must be clean and grease-free.
Remove component or piping.
Immediately bag or seal all exposed ends of system with plastic.
Installation or Reinstallation.
The new component or cleaned pipe shall be wrapped or doublebagged. If not, the item shall be
returned for cleaning.
The component or piping shall be removed from bagging and shall be inspected for damage at the
mating surfaces, threads, or connecting surfaces and any primary surface. Inspect for dust or minor
particle contamination, and remove with lint-free rag.
Mating components and pipe shall have protection materials or plugs removed.
Mating surfaces, preformed packings and threads shall be coated lightly with an approved lubricant.
Threaded surfaces must be coated to prevent galling of threads at assembly.
A pressure test shall be performed to verify that there are no leaks and that the correct fittings have
been installed in the system.
4-38. Pre-Cleaning of Components or Piping . Upon receipt of new components not cleaned or components and pipe
removed from the system for cleaning, the item shall be pre-cleaned. Doing this shall prepare the component for final
cleaning. Pre-cleaning will be accomplished in an area separate from the clean area. The pre-cleaning will include but is
not limited to the following:
All wrapping shall be removed.
Loose paint, rust, brackets, panels, tags, supports and other such items shall be removed.
If hydrocarbons and/or other contaminants are known to have been introduced into the component or piping,
a thorough degreasing procedure shall be initiated. Trisodium phosphate (TSP) or non-ionic detergent (NID)
may be used.
Visually inspect the pre-cleaned articles under bright light to ensure that all gross contamination has been
Bag all components and ends of pipe with plastic to await cleaning.