TM 5-4220-233-14
b. For cleaning pipe or tubing the following procedures should be followed:
(1) Determine the volume of cleaning solution estimating the length of pipe or hose to be cleaned and the size
of the pipe to be cleaned. look up the appropriate pipe/ube size and then the corresponding volume (in cubic
inches) per one foot length in table 4-3. Multiply that volume by the estimated length to be cleaned After the
total volume Is calculated, multiply the answer in cubic inches by .00433 After the total volume is calculated,
multiply the answer in cubic inches by 00433 to obtain the number of gallons to fill the system. Determine
applicable flow rate from table 4-4 and multiply flow rate by 30 to compute number of gallons required to pump
through the system Add volume required to fill system and the volume required to pump through the system for
the total volume of cleaning solution required.
Table 4-3. TSP Cleaning Solution Volume.
Pipe/Tube Size
Volume of 1 Foot (30 cm) Length
in (cm)
1/4 (0 6 cm)
0 6 cubic inches (9.7 cm3)
3/8 (1 0 cm)
1 3 cubic inches (21 7 cm3)
1/2 (1 3 cm)
2 4 cubic inches (38 6 cm3)
3/4 (1 9 cm)
5 3 cubic inches (86 9 cm3)
1 (2 5 cm)
9 4 cubic Inches (154.5 cm3)
1-1/2 (3.8 cm)
21.2 cubic inches (347.6 cm3)
2 (5 1 cm)
37.7 cubic inches (617 0 cm3)
(2) Prepare a solution at a ratio of 2 pounds 90 9 kg) of TSP, 0.5 ounces (14.7 mL) non-ionic detergent
for each 80 gallons (302.8 L) of distilled or deionized water as determined.
(3) Heat solution to 165 degrees F (74 degrees C) mixing occasionally during the heating.
(4) Pump the cleaning solution through the pipe/tubing for 30 minutes at a rate listed in table 4-4 using
the solution pump, and maintain constant temperature at all times It may be necessary with some
piping configurations to cap or plug some openings and alternate with others to maintain even flow of
cleaning solution to all segments of the pipe. If you run out of cleaning solution prior to the 30
minutes listed, prepare another volume of cleaning solution.
(5) Pump hot distilled or deionized water through the system to rinse until all visible traces of cleaning
solution are removed.
(6) Draw 0 34 ounces (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 (Item 2, Appendix C) and seal or tape closed all components and ends of pipe or hoses
with plastic until ready for reinstallation.
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