60291229 CLEAN.pdf

This is a technical specification document for cleanliness requirements (Doc# 6029-1229) that establishes standards for hardware components at the point of shipment following fabrication completion.

The specification mandates that all applicable hardware internal surfaces and parts must be dry and visually clean, free of dirt, loose corrosion products, grease, oil, machining particles, and foreign material. Acceptable conditions include a thin adherent oxidation film from heat treatments or welding, light superficial rust film on carbon or alloy steel, and discrete lint fibers less than 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 would preclude further cleaning, with protection from dirt, grit, cutting oils, and other contaminants during subsequent assembly operations. Flushing may be used for post-assembly cleaning if demonstrated effective for the specific hardware geometry and materials involved. Prior to shipment, a visual inspection of internal surfaces and parts through remaining hardware openings is required to verify compliance with cleanliness standards. All hardware openings not covered by permanent closures must be sealed with temporary cleanness covers or captivated plugs made of rigid rubber, rigid plastic, or metal. Materials used for these covers or plugs are prohibited from containing sulfur or other halogens in their chemical structure, specifically excluding fluorocarbon (Viton) or chlorocarbon (Neoprene) rubber or plastic. The exception permits polytetrafluoroethylene (Teflon) use. Internal parts packaged separately must be sealed in plastic bags or suitable packaging that maintains cleanliness throughout shipment.