ASTM D4883-99

D4703-24

Standard Practice for Compression Molding Thermoplastic Materials into Test Specimens, Plaques, or Sheets

D3350-25

Standard Specification for Polyethylene Plastics Pipe and Fittings Materials

D1248-25

Standard Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable

D883-26b

Standard Terminology Relating to Plastics (Includes all amendments and changes 8/24/2026).

D1505-25

Standard Test Method for Density of Plastics by the Density-Gradient Technique

D618-21

Standard Practice for Conditioning Plastics for Testing

E691-23

Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

E494-20(2025)

Standard Practice for Measuring Ultrasonic Velocity in Materials by Comparative Pulse-Echo Method

D4976-12a(2020)

Standard Specification for Polyethylene Plastics Molding and Extrusion Materials (Includes all amendments and changes 11/17/2022).

D792-20

Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement