TM 5-4220-227-14
Table 4-4. Cleaning Solution Flow Rate.
Tube Size (inches)
GPM
Pipe Size (inches)
GPM
1/4 (0.6 cm)
1/2
1/4 (0.6 cm)
2
3/8 (1.0 cm)
2
3/8
(1.0 cm)
3
1/2 (1.3 cm)
3 3/4
1/2
(1.3 cm)
5 1/2
3/4 (1.9 cm)
6 3/4
3/4
(1.9 cm)
9 1/2
1 (2.5 cm)
12 1/2
1
(2.5 cm)
15 1/2
1 1/4 (3.1 cm)
23
1 1/2 (3.8 cm)
35
2 (5.1 cm)
50
(5) Pump hot distilled or deionized water through the system to rinse until all visible traces of cleaning solution are
removed.
(6) Draw 10 mL sample. Agitate to observe for soap bubbles. If any soap bubbles are present, repeat step (5) until
no bubbles are observed.
(7) Blow dry parts or components with clean, dry, oil-free nitrogen (preferably heated to 200 degrees F (93.3 degrees
C)) until all visible signs of water are absent. Maintain process for 1 to 2 hours after initial purge.
(8) Double bag and seal or tape closed all components and ends of pipe or hoses with plastic until ready for
reinstallation.
c. Hoses shall be cleaned as specified in paragraph 4-56.
4-58.
Cleaning Component Soft Goods . The following isopropyl alcohol method is provided for the cleaning of the
soft goods and aluminum parts of system components. The method for non-ionic detergent is the same procedure as that
in paragraph 4-56.
CAUTION
Ensure ventilation is adequate and avoid breathing vapors.
Personnel should wear chemical protective gloves to prevent skin irritation when contact
with isopropyl alcohol Is necessary.
4-91
