Standard Specification for Polyimide Rigid Cellular Thermal Insulation
NORM herausgegeben am 1.3.2023
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Designation standards: ASTM C1594-23
Publication date standards: 1.3.2023
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: American technical standard
Kategorie: Technische Normen ASTM
This specification establishes the composition and physical properties of rigid polyimide cellular foams intended for use as thermal and sound-isolating insulation in commercial and industrial environments. The polyimide insulations covered are classified into three types (Types I, II, and III) according to closed cell content, and into four grades (Grades 1, 2, 3, and 4) according to density. Type II insulation is further divided into two classes (Classes 1 and 2) according to upper temperature limits. Materials shall be manufactured from the appropriate monomers and necessary ingredients. Specimens shall be sampled, tested, and conform accordingly to the following physical property requirements: apparent thermal conductivity; water and gas permeability; density; percent closed cell; upper temperature limit; high temperature stability; compressive strength; compressive force deflection; water vapor transmission; steam aging characteristics (tensile strength, dimensional and weight changes), corrosiveness; chemical resistance; vertical burn characteristics (flame application and time, burn length, and dripping); specific optical smoke density for both flaming and non-flaming exposures; toxic smoke generation; surface burning characteristics (flame spread and smoke developed indices); combustion by-products (carbon monoxide, hydrogen fluoride, hydrogen chloride, nitrogen oxides, sulfur dioxide, and hydrogen cyanide); oxygen index, and 14 scale room burn.
Keywords:
cellular insulation, closed cell, pipe insulation, polyimide, ship insulation, thermal insulation, thermal protection systems,, ICS Number Code 83.100 (Cellular materials),91.120.10 (Thermal insulation of buildings)