MIL-STD-1622B(SH)
4.4.2 Health and safety. Data on the cleaner, including the Material Safety Data Sheet (MSDS) shall be reviewed by cognizant health and safety personnel to determine the following:
(a)Flammability of the cleaner to include flash point, and upper and lower explosion limits if applicable. The fire hazard resulting from leaving the cleaner in a system shall be evaluated and mitigated.
(b)Toxicity of the cleaner to the worker. Vendors should have either tested the cleaner or reviewed each constituent of the cleaner with an acceptable toxicology data base such as Registry of Toxic Effects of Chemicals (RTECs). Activities are cautioned that
biodegradability is not a measure of toxicity, and should never be substituted as such. For solvent cleaners ensure an 8-hour time weighted average exposure criteria is recommended. Additionally, for solvents, ensure the vendor specified a method to monitor workplace exposure. Cleaners used on board submarines shall be evaluated as specified by the Submarine Atmosphere Material
Control Program directed by the Navy Environmental Health Center.
4.4.3 Material compatibility. Data on the cleaner shall be reviewed by cognizant engineering personnel to determine the compatibility of the cleaner with metallic, plastic and rubber materials. Examples of acceptable test methods and acceptance criteria are in MIL-DTL-24800. Ensure the cleaner was tested at a temperature and duration equal to or greater than the maximum process application, and that data presented by the vendor supports their recommendations. Also, be aware that some structural plastics, such as valve seats, need to be tested in the stressed condition to obtain realistic
results.
4.4.4 Disposal. Information on the cleaning process including data on the cleaner, as well as rinse water, if applicable, shall be reviewed by cognizant environmental personnel to determine the appropriate waste disposal requirements. The cleaner vendor should have data on the effluent toxicity of the cleaner performed in accordance with approved Environmental Protection Agency (EPA) test methods. Activities are cautioned that biodegradability is not a measure of effluent toxicity, and should never be substituted as such.
4.4.5 Process application. A process procedure shall be developed to specify how the cleaner will be safely and effectively used if different from that specified by this standard. Items that should be addressed in the cleaning process by either the approving activity or the vendor include the following:
(a)Cleaner safety precautions.
(b)Specifications for the equipment used in the cleaning process that
includes the application temperature of the cleaner, and fluid
velocity if applicable.
(c)Minimum and maximum limits for cleaner concentration, cleaning
duration, and cleaner stowage requirements.
(d)Directions to remove and verify removal of aqueous cleaners after
the cleaning process. This includes application of rinse water
and methods used to verify completion of the rinse step such as
measurement of pH or conductivity, or checking for foam by a shake
test.
(e)Directions to dry the component or system after cleaning or
rinsing. Solvent cleaning processes shall specify a minimum time
duration necessary to ensure the solvent has completely
evaporated. Aqueous cleaning processes shall use the direction
contained in this standard.
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