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HH-I-530 Revision B, August 12, 1981
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INSULATION BOARD, THERMAL, UNFACED POLYURETHANE OR POLYISOCYANURATE
Includes all amendments and changes through Cancellation Notice , February 6, 1985
Additional Comments: CNCL NO S/S
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This specification covers the requirements for unfaced, regid cellular polyurethane or polyisocyanurate thermal insulation boards. The thermal insulation boards in this specification are intended for use within the temperature range of -400 Fahrenheit (F) t o +225┬║ F. This specification does not cover cryogenic applications.