1.1?This specification covers the types, physical properties, and dimensions of unfaced, preformed rigid cellular polyisocyanurate plastic material intended for use as thermal insulation on surfaces from –297��F (–183��C) to 300��F (149��C). For specific applications, the actual
ASTM C591-21 history
2022ASTM C591-22 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2021ASTM C591-21 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2020ASTM C591-20 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2019ASTM C591-19a Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2019ASTM C591-19 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2017ASTM C591-17 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2016ASTM C591-16 Standard Specification for Unfaced Preformed Rigid Cellular PolyisocyanurateThermal Insulation
2015ASTM C591-15 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2013ASTM C591-13 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2012ASTM C591-12b Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2012ASTM C591-12a Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2012ASTM C591-12 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2011ASTM C591-11 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2009ASTM C591-09 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2008ASTM C591-08a Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2008ASTM C591-08 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2007ASTM C591-07 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2005ASTM C591-05 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2001ASTM C591-01 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
2001ASTM C591-00 Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
1985ASTM C591-85 Standard Specification for Unfaced Preformed Rigid Cellular Polyurethane Thermal Insulation