The main difference between ASTM D2457 and ASTM D2467 lies in their application and material specifications:

  1. ASTM D2457:
    • Purpose: This standard specifies the test method for the gloss of plastics and nonmetallic coatings using a 60° specular gloss measurement.
    • Use Case: It is primarily used to evaluate the surface finish or glossiness of plastic materials, not directly related to PVC fittings.
  2. ASTM D2467:
    • Purpose: This standard covers Schedule 80 PVC pressure fittings, including the dimensions, tolerances, and pressure ratings of these fittings used in piping systems.
    • Use Case: It is specific to Schedule 80 PVC fittings for pressure applications, such as water distribution and industrial piping systems.

In summary, ASTM D2457 is about measuring surface gloss on plastics, while ASTM D2467 is the standard for Schedule 80 PVC fittings.

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