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products from the surface, and also for the removal of abrasive from pockets and <br />corners. <br />The surface, if wet sandblasted, shall be cleaned by rinsing with fresh water to which <br />sufficient corrosion inhibitor has been added to prevent rusting, or with fresh water <br />followed immediately by an inhibitive treatment. This cleaning shall be supplemented <br />by brushing, if necessary, to remove any residue. <br />The compressed air used for nozzle blasting shall be free of detrimental amounts of <br />condensed water or oil. Adequate separators and traps shall be provided. <br />Blast cleaning operations shall be done in such manner that no damage is done to <br />partially or entirely completed portions of the work. <br />Dry blast cleaning operations shall not be conducted on surfaces that will be wet after <br />blasting and before painting, or when ambient conditions are such that any visible <br />rusting occurs before painting or coating. <br />If any rust forms after blast cleaning, the surface shall be reblast cleaned before <br />painting. <br />The blast cleaned surface shall be examined for any traces of oil, grease, or smudges. If <br />present, they shall be removed as outlined in Specification SSPC-SP 1-82, "Solvent <br />Clearung". <br />The height of profile of the anchor pattern produces on the surface shall be limited to a <br />maximum height that will not be detrimental to the life of the paint film. The maximum <br />particle sizes specified in paragraphs 1 to 7 may produce an anchor pattern that is too <br />high or too rough for the paint system to be used. In such cases the abrasive sizes <br />should be reduced. If the application of the second coat of paint is deferred, an <br />adequate reduction in anchor pattern depth shall be made. <br />The blast cleaned surface should be further treated or primed, as specified in the <br />agreement covering the work, preferably within 24 hours after blast cleaning when <br />practicable, but in any event before any visible or detrimental rusting occurs. <br />Where chemical contamination of the surface may occur, the steel should be painted as <br />soon as possible after blast cleaning. <br />TS3-3 <br />451 <br />