ASTM International Standard Specification for Woven Asbestos Cloth ASTM D1571-95(2004)e1

This specification covers woven asbestos cloth having a specified minimum weight % of asbestos fiber, excluding mass of other inorganic reinforcing strands which may be present. Asbestos cloths are classified into classes (Classes A, B, C, D, and E) according to the nature of the yarns from which they are woven, and into grades (Commercial, Underwriters', A, AA, AAA, and AAAA) according to the percentage of asbestos content by mass. Style designations are also given for both non-metallic and metallic (wire-inserted) asbestos cloths. Specimens shall be sampled, prepared, tested, and conform accordingly to specified physical (yarn and reinforcement type), electromagnetic (electrical insulation), mechanical (tensile or breaking strength), chemical (asbestos content), and dimensional property (width, thickness, mass per unit area or weight, fabric count, and yarn number) requirements.