HH-I-1972/5, FEDERAL SPECIFICATION: INSULATION BOARD, THERMAL, POLYURETHANE OR POLYISOCYANURATE FACED WITH PERLITE BOARD ON BOTH SIDES OF THE FOAM (12 AUG 1981) [NO S/S DOCUMENT]

HH-I-1972/5, FEDERAL SPECIFICATION: INSULATION BOARD, THERMAL, POLYURETHANE OR POLYISOCYANURATE FACED WITH PERLITE BOARD ON BOTH SIDES OF THE FOAM (12 AUG 1981) [NO S/S DOCUMENT]., This specification covers the requirements for faced thermal insulation boards composed of rigid cellular polyurethane or polyisocyanurate faced with perlite board on both sides of the foam. This specification does not cover cryogenic applications. For intended use see 6.1 of HH-I-1972/GEN.