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This specification covers requirements for extruded (cast or blown) and compression-molded sheeting made from low-, medium- and high-density polyethylenes and copolymers in thickness of 0.25 mm (0.010 in.) and greater. Depending on the functional requirements, sheeting conforming to this specification is used in applications such as chemical tank linings, spacers in electrical equipment, thermoforming into such items as trays, pallets, and shipping containers, and as machine-shop stock. Polyethylene materials, being thermoplastics, are reprocessable and recyclable (see Guides D5033 and D7209). This specification allows for the use of those polyethylene plastic materials, provided that any specific requirements as governed by the producer and end user are met. The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. The following precautionary caveat pertains only to the test methods portion, Section 11, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. NOTE 1: There is no known ISO equivalent to this standard.