The timely inspection and repair of lining systems in an approved manner will increase the life expectancy of lining systems. Therefore, the purpose of this document is to present procedures for repairing existing lining systems that are deteriorating. The procedures discussed in this recommended practice include cleaning, surface preparation, priming, and top coating of the most widely used linings. Included are discussions of thin film, thick film, and extra thick film linings (defined in Sections 5-7) which may be applied to substrates of steel, nonferrous metals, metallizing, concrete, masonry, tile, and wood by spray, brush, roller, or trowel methods. The general linings include inorganic zinc, organic zinc with topcoats, vinyl, chlorinated rubber, phenolic, epoxy, urethane, coal tar epoxy, coal tar urethane, polyethylene--chlorsulfonated, neoprene, rubber, polyester, vinyl ester, and plastisol. Reinforced linings are included as well as materials used for repair which may not be of the same generic class as the original lining. This recommended practice does not include discussions of the

following:

• sheet lining such as rubber, polyvinyl chloride (PVC), and lead;

• fused linings such as glass and fluorocarbon; and

• brick, masonry lining, or floor toppings.

This recommended practice was prepared by Task Group T-6A-38 on Repair and Maintenance of Lining Systems, a component of Unit Committee T-6A on Coating and Lining Materials for Immersion Service, and is issued by NACE under the auspices of Group Committee T-6 on Protective Coatings and Linings. Historical Document 1991