High Temperature Coatings
High Temperature Coatings
Surfaces with operating temperatures ranging from 400° F to 1200° F need high temperature paint, whether or not the surface is insulated. These areas include boilers and economizers, machinery casings, and piping surfaces.
Navy requirements for heat resistant paints (another name for high temperature coatings) appear in Naval Ships Technical Manual Chapter (NSTM) Chapter 631. On surface ships and submarines specifications dictate using Heat-Resistant paint in various compartments and spaces where surfaces are exposed to temperatures above 149ºC (300ºF) (unmanned spaces) and 52ºC (125º) (manned spaces). Heat-Resistant paints are identified in specification TT-P-28G. They do not cure until exposed to the substrate temperature of 121ºC (250ºF).
Generally, high temperature coatings contain an aluminum pigment in a silicone or modified silicone resin in a solvent vehicle. Prior to application of high temperature coatings, the surface must receive a power tool cleaning that meets the SSPC-SP-11 standard. Proper application requires two thin coats on well-prepared, dry metal surfaces.
Applicators should follow the safety guidelines described in NSTM Chapter 631.
Applicable Specifications
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