MIL-I-22023D

Abstract

This specification covers lightweight, faced and unfaced flexible fibrous glass felt for thermal and sound absorbing insulation for use in temperatures up to 204 degrees Celsius (&#176;C) (400 degrees Fahrenheit (&#176;F)). <b><u>Intended Use:</u></b> The material covered by this specification is intended to be used as thermal insulation or acoustic treatment or both for ventilation ducts, bulkheads, and overheads aboard ship. In accordance with ship specifications the listed materials are typically used in the following applications: <pre>Types of material Shipboard application ------------------------------------------------------------- I &#8226; Thermal lagging of heating, ventilation and air conditioning ducts. &#8226; Thermal treatment for compartments. II &#8226; Acoustic lagging and lining of heating ventilation and air conditioning ducts. &#8226; Acoustic treatment of compartments. III &#8226; Treatment alternative for type II materials protected by vapor barriers.</pre> The type III material shall be painted with a maximum of two coats of paint since accumulated layers of paint will adversely effect the sound absorption characteristics. Accordingly, the type III material shall be maintained by washing in lieu of painting. The faced material shall be primed with one coat of Latex Emulsion flat primer (Ocean Chemicals, Inc. No. 634 or equal) in accordance with manufacturer instructions. The finish coat shall be one coat of fire retardant paint conforming to MIL-E-17970 (see <a>4.5.5</a>). <br>