Shipbuilding and ship repair operations

Marine coatings can be applied by the use of spraying equipment, brushes, or rollers. Coating operations at shipyards are typieally eondueted at two primary locations (1) outdoor work areas or (2) indoor spray booths. The outdoor work areas ean include ship exteriors and interiors. Most shipyards report that typieally only a small percentage (10%) of the coating operations are done indoors. However, in large eonstruetion yards a larger proper- 

For material accounting purposes, we can classify cleaning (unit) operations as follows  

Surface preparation of large manufactured components (stage before a coating is applied). 

Line cleaning (includes piping network and any associated tanks). 

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U.S. Environmental Protection Agency (EPA), Control Techniques Guideline Shipbuilding and Ship Repair Operations (Surface Coating), Office of Air Qualify Planning and Standards, North Carolina, EPA-453/R-94-015, (NTIS no. PB94-156791). 

Several types of part cleaners are used at shipbuilding and ship repair facilities. The types used in such facilities vary from the more simple sink and spray systems to more elaborate parts (machine) cleaners of the cold or vapor types. Most of the parts cleaners in shipyards are small — around 1.5 m x 1 m and 1 m deep - usually located in the machine shops, not the paint rooms. Most of the parts are small components being cleaned prior to being joined to other small parts into assemblies and sub-assemblies or being cleaned as part of some type of repair operation. Most of parts cleaners used were basket-type design with the parts loaded into a basket and dropped through the vapor zone several times to clean off the oils and dirt. Some shipyards use contractors to come in and change out the solvent on a routine schedule. 

U.S. EPA, Surface Coating Operations at Shipbuilding and Ship Repair Facilities—Background... 

U.S. EPA, Surface Coating Operations at Shipbuilding and Ship Repair Facilities— Background Information for Proposed Standards, Office of Air Quality Platming and Standards, North Carolina, EPA-453/D-94-01 la, (NTIS no. PB95-197471), 1994, p. 318. 

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