Material covered by this document is intended for use as high temperature fire, thermal and acoustic insulation for ship hulls, bulkheads, overheads, decks, structural panels, stiffeners, and stanchions. It will be used to retard fire spread between compartments.

High temperature fire insulation equivalency rating.

Type II and type III materials may be substituted for thermal and acoustic insulation materials (see 6.1.1.1 and 6.1.1.2).

Thermal insulation.

High temperature thermal insulation may be substituted for thermal insulation in accordance with table XI. Substitutions of thermal insulation (specifically, MIL-DTL-32585, type I, form I, facing B) for the equivalent high temperature thermal insulation (type II), as detailed in this specification, are categorically disallowed.

Acoustic insulation.

High temperature acoustic insulation may be substituted for acoustic insulation in accordance with table XI. Substitutions of acoustic insulation (specifically, MIL-DTL-32585, type II, form 1, facing C and type II, form 2, facing D, any high transmission loss treatment) for the equivalent high temperature acoustic insulation (type III, classes 1 through 4), as listed in this specification, are categorically disallowed.