HH-I-1972/3 1981 Edition, August 12, 1981
INSULATION BOARD, THERMAL, POLYURETHANE OR POLYISOCYANURATE FACED WITH PERLITE INSULATION BOARD ON ONE SIDE AND ASPHALT/ORGANIC FELTOR ASPHALT/GLASS FIBER ON THE OTHER SIDE OF THE FOAM
Includes all amendments and changes through Cancellation Notice 2, June 4, 2001
Additional Comments: CNCL NO S/S
This specification covers the requirements for faced thermal insulation boards composed of rigid cellular polyurethane or polyisocyanurate faced with perlite insulation board on one side of the foam and asphalt/ organic felt or asphalt/glass fiber felt faced on the other side of the foam. This specification does not cover cryogenic applications. For intended use see 6.1 of HH-I-1972/GEN.
Unless otherwise specified (see 6.2 of HH-I-1972/GEN), the thermal insulation boards shall be of the following styles as specified.
Style 1 - Faced with a perlite insulation board on one side and an asphalt/organic felt on the other side of the foam. Style 2 - Faced with a perlite insulation board on one side and an asphalt/glass fiber felt on the other side of the foam.