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)

4.2.5.5  Use of NAVSEA approved halogenated solvents.  Follow the instructions provided by the vendor and as directed herein.

4.2.5.6  Water previously used in systems.  Halogenated solvents containing chlorine can react with water forming corrosive acids.  Systems previously known or believed to contain water or aqueous cleaning solutions shall be purged with nitrogen as specified in 4.5.3.  An outlet dew point of a

-40oF at atmospheric pressure shall be obtained prior to introducing any halogenated solvent that is known or believed to produce acids in contact with water.

4.3  Other cleaners.

4.3.1  Other cleaners for general applications.  Any materially compatible aqueous cleaning solution or cleaning solvent may be used for general applications with local engineering and environmental approval. Directions for use, safety precautions, disposal and compatibility are the responsibility of the approving activity.  For all naval activities, review by the cognizant medical department or industrial hygienist shall be obtained prior to locally approving the use of any aqueous cleaning solution or

cleaning solvent other than those specified in 4.2.  The selection criteria for approving alternative cleaners is specified in 4.4.

4.3.2  Other final cleaners for critical applications.  No aqueous cleaning solution other than TSP solutions, or MIL-DTL-24800 compositions, shall be used as a final cleaner.  Use of pre-cleaners shall be as specified in 4.3.1.  Other than NAVSEA approved halogenated solvents specified in Appendix B, approval shall be obtained prior to using any cleaning solvent as a final cleaner (see 6.3).  Activities interested in obtaining approval of other final cleaning solvents or processes shall obtain direction (see 6.3).

4.4  Other cleaner selection criteria.  The selection of a cleaner for precleaning of critical applications or cleaning of general applications shall consist of an evaluation of each requirement specified in Table II.  Failure

to complete the evaluation as specified in Table II can result in component damage or personal injury.

4.4.1  Cleaning performance.  The cleaner shall be tested to verify acceptable cleaning performance with target soil, substrates and processes. Examples of test methods to determine cleaning performance by soaking, using ultrasonic tanks or by pipe flushing are in MIL-DTL-24800.

TABLE II.  Testing requirements for other cleaners.

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