60291228 CLEAN.pdf

This document is a Cleanliness Requirements specification (Doc# 6029-1228) that establishes standards for component preparation and shipment after fabrication.

The specification requires that all applicable hardware internal surfaces and parts be dry and visually clean, free of dirt, loose corrosion products, grease, oil, machining particles, and other foreign material at the time of shipment. Acceptable conditions include thin adherent oxidation films from heat treatments or welding, light superficial rust films on carbon or alloy steel, and a limited number of discrete lint fibers not exceeding one-fourth inch in length. For internal surfaces and parts that cannot be cleaned after assembly, cleaning and inspection must occur prior to the assembly operation that precludes further cleaning, with protection from dirt, grit, cutting oils, and other contaminants during subsequent operations. Flushing may be used as an alternative cleaning method after assembly where demonstrated effective for the specific hardware geometry and material involved. Prior to shipment, a visual inspection of internal surfaces and parts must be performed through remaining hardware openings to verify compliance with cleanliness standards. All uncovered hardware openings must be sealed with temporary cleanness covers or captivated plugs made of rigid rubber, rigid plastic, or metal, with a critical restriction that cover or plug materials cannot contain sulfur or halogens in their chemical structure—excluding polytetrafluoroethylene (Teflon). Fluorocarbon materials such as Viton and chlorocarbon materials such as Neoprene are explicitly prohibited for covers or plugs. Separately packaged internal parts must be sealed in plastic bags or equivalent suitable packaging that maintains cleanliness throughout storage and transport.