1.1 This specification covers the types, physical properties, and dimensions of cellular polypropylene intended for use as thermal insulation for temperatures from - 150 to + 240°F (-101 to + 116°C).1.2 The use of thermal insulation materials covered by this specification is regulated by codes and standards that address fire performance.1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for informa