MIL-STD-1330D(SH)
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3. DEFINITIONS
3.1 Aqueous cleaning solution. An aqueous cleaning solution is a water based cleaner whose constituents are soluble inorganic compounds such as silicates or phosphates or soluble organic compounds such as non-ionic surfactant or combinations thereof. Examples of aqueous cleaning solutions include commercial detergents which generally contain both soluble inorganic and organic compounds and Navy oxygen cleaner (NOC) which contains only soluble inorganic compounds.
3.2 Blue line. When a cut for a pipe or fitting nears the inner wall, the outer surface turns blue which is referred to as cutting to the blue line. The blue line results from oxidation caused by the reduced ability of the thinned pipe or fitting to dissipate heat generated by the power tool cutting the surface.
3.3 Clean. Clean refers to the absence of scale, particulate, oil, and grease contaminants at a level below that which adversely affects the operation or reliability of the component or system. The process of cleaning should not affect the form, fit, or function of the item being cleaned.
3.4 Cleaning solvent. A cleaning solvent is any material that exhibits the capability to dissolve other substances through chemical action and, for the purposes of this document, is 100 percent volatile. Examples include halogenated solvents such as HCFC-141b which is non-flammable and hydrocarbon solvents such as isopropyl alcohol (IPA) which is very flammable.
3.5 Cleanliness level. A cleanliness level is an established maximum allowable distribution of contamination of a given size and quantity in a specified area or volume.
3.6 Clean lint-free cloth. A clean lint-free cloth in accordance with MIL-DTL-24671, or equal, is used for local cleaning or wiping surfaces to evaluate loss of cleanliness. The cloth should be free of chemicals which could pose
a compatibility, flammability, or toxicity hazard considering the specific application.
3.7 Cleanroom. A cleanroom is a permanent area where a high degree of cleanliness is continuously achieved by employing varying degrees of control and monitoring of environmental items such as ventilation, filtration, temperature, humidity, pressure, personnel, clothing, and room maintenance. Refer to 5.1 for cleanroom requirements.
3.8 Components. Components refer to items such as valves, fittings, gauges, regulators, and repair parts in the systems.
3.9 Contractor. A contractor is any person not employed by the U.S. Navy performing services on-board ships or at shore base facilities on components or systems defined by 1.2.
3.10 Controlled area. A controlled area is an area where a high degree of cleanliness is temporarily achieved and maintained by the use of temporary boundaries, air filtration, and the enforcement of strict controls on personnel access, operations, and area maintenance. Controlled areas are most often used for in-place maintenance and repair of shipboard systems. Refer to 5.1 for controlled area requirements.
3.11 Critical applications. Critical applications are systems or components requiring more detailed cleanliness and packaging requirements than generally specified because of unique operating parameters and environments. In the past, some saturated diving systems have been classified as critical applications because of the increased toxicity hazard associated with high partial pressure environments. Unless directed by NAVSEA or the Type Commander, critical requirements may not be used.
3.12 Dew point. Dew point is the measure of dryness or wetness of a gas. It is defined as the temperature at which gas becomes saturated with water vapor causing condensation when cooled at constant pressure. Dew point temperature is measured at atmospheric pressure.
3.13 Final cleaner. A final cleaner is an aqueous cleaning solution or a cleaning solvent used for final flushing of piping systems or final precision cleaning of components and parts.
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