ASTM D 1248—05 Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable (PDF Download)
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This specification provides for the identification of polyethylene plastics extrusion materials for wire and cable in such a manner that the seller and the purchaser can agree on the acceptability of different commercial lots or shipments. The polyethylene plastics are identified primarily on the basis of two characteristics, namely, density and flow rate (previously identified as melt index). The former is the criterion for assignment as to type which are as follows: Type 0,Type I, Type II, Type III, and Type IV, the latter for designation as to category which are: Category 1,Category 2, Category 3,Category 4, and Category 5. Other attributes important for certain applications are covered by three general classes and by specifying in greater detail, by grades, a minimum number of key characteristics covered too broadly or not at all by the type, class, and category designations. Each of five types and categories is subdivided into four classes according to composition and use as follows: Class A, Class B, Class C, and Class D. In addition, the materials can be classified into different grades namely Grade E1, Grade E2, Grade E3, Grade E4, Grade E5, Grade E6, Grade E7, Grade E8, Grade E9, and Grade E10. The extrusion material for wire and cable shall be polyethylene plastic in the form of powder, granules, or pellets. The extrusion materials for wire and cable shall be as uniform in composition and size and as free of contamination as can be achieved by good manufacturing practice. Different tests shall be conducted in order to determine the following physical properties of extrusion materials: tensile stress, elongation, brittleness temperature, environmental stress-crack resistance, thermal stress-crack resistance without cracking, dissipation factor before and after milling, dielectric constant, volume resistivity, water immersion stability, absorption coefficient, weatherability for colored materials, and carbon content.
This standard is referenced in the 2012 International Residential Code®.
Description: | This specification provides for the identification of polyethylene plastics extrusion materials for wire and cable in such a manner that the seller and the purchaser can agree on the acceptability of different commercial lots or shipments. The polyethylene plastics are identified primarily on the basis of two characteristics, namely, density and flow rate (previously identified as melt index). The former is the criterion for assignment as to type which are as follows: Type 0,Type I, Type II, Type III, and Type IV, the latter for designation as to category which are: Category 1,Category 2, Category 3,Category 4, and Category 5. Other attributes important for certain applications are covered by three general classes and by specifying in greater detail, by grades, a minimum number of key characteristics covered too broadly or not at all by the type, class, and category designations. Each of five types and categories is subdivided into four classes according to composition and use as follows: Class A, Class B, Class C, and Class D. In addition, the materials can be classified into different grades namely Grade E1, Grade E2, Grade E3, Grade E4, Grade E5, Grade E6, Grade E7, Grade E8, Grade E9, and Grade E10. The extrusion material for wire and cable shall be polyethylene plastic in the form of powder, granules, or pellets. The extrusion materials for wire and cable shall be as uniform in composition and size and as free of contamination as can be achieved by good manufacturing practice. Different tests shall be conducted in order to determine the following physical properties of extrusion materials: tensile stress, elongation, brittleness temperature, environmental stress-crack resistance, thermal stress-crack resistance without cracking, dissipation factor before and after milling, dielectric constant, volume resistivity, water immersion stability, absorption coefficient, weatherability for colored materials, and carbon content. This standard is referenced in the 2012 International Residential Code®. |
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Pages | 9 |
Code Year | 2012 |
Publisher | ASTM International |
Language | English |