MIL-STD-1622 Cleaning Of Shipboard Compressed Air SystemsThis standard provides the requirements for cleaning of compressed air systems and components.

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MIL-STD-1622B(SH)

Table III. Flask cleaning matrix.

Requirement	General Applications		Critical Applications
Requirement	Uncoated	Phosphate Coated	Uncoated	Phosphate Coated
Cleaning	5.4.3(a)	5.4.3(a)	5.4.3(b) and 5.4.3(c) or (d)	5.4.3(b) and 5.4.3(c)
Hydrocarbon cleanliness verification	5.4.3(a)	5.4.3(a)	5.4.3(e) or 5.4.3(f)	5.4.3(e)
Rinse for cleaner removal	5.4.3(g) or (h)	5.4.3(g) or (h)	5.4.3(h)	5.4.3(h)
Particulate cleanliness verification	5.4.3(i)	5.4.3(i)	5.4.3(i)	5.4.3(i)
Drying	5.4.4	5.4.4	5.4.4	5.4.4
Final Inspection	5.4.5	5.4.5	5.4.5	5.4.5

5.4.3 Clean, verification, and rinse. Cleaning, verification, and rinsing should be accomplished as specified in Table III in a clean area with the flasks positioned vertically to facilitate drainage.

(a)Clean general application flasks using a low foaming compatible cleaner selected as specified in 4.3. Use the cleaner in accordance with the process determined as specified in 4.4. If using NOC, apply the cleaner as specified in 5.4.3(c). If using TSP, apply the cleaner as specified in 5.4.3(d). Remove cleaning agent by rinsing as specified in 5.4.3(g) or 5.4.3(h).

(b)Critical application flasks final cleaned with a fill and recirculate process as specified in 5.4.3(c) or 5.4.3(d) shall be pre-cleaned as specified in 5.3.4 using a low foaming compatible pre-cleaner and then rinsed with water until all visible oil, grease, ink, dye, and cleaning agent are removed. Flasks final cleaned with a spray process as specified in 5.4.3(c) or 5.4.3(d), or flasks with no visual evidence of oil, grease, ink, or dye may eliminate this pre-clean step.

(c)Clean critical application flasks with NOC (or TSP as specified in

5.4.3(d) for uncoated flasks) at not less than 120oF for a time

sufficient to ensure all wetted surfaces are in contact with the

cleaner for not less than 10 minutes if using a spray process, or at 150 to 170oF for 30 minutes if using a fill and recirculate process. Use of sprayers with high flow and low pressure or low flow and high pressure are recommended.

(d)Clean critical application flasks with TSP (or NOC as specified in

5.4.3(c)) at 160 to 190oF for a time sufficient to ensure all

wetted surfaces are in contact with the cleaner for no less than

10 minutes if using a spray process, or 30 minutes if using a fill

and recirculate process. Use of sprayers with high flow and low

pressure or low flow and high pressure are recommended. When

using TSP, the flask shall be preheated by circulating or spraying