Work Item
ASTM WK89446

Revision of D1238-23a Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer

Rationale

Add tolerances to piston scribe marks. In section 6.4.2 piston require scribe marks 4mm apart with the bottom mark 48mm from the reference point to the top of the die but there are no tolerances for the placement of these marks. Use of a “shall” without tolerance makes it unclear whether you are meeting the requirement.

Details

Developed by Subcommittee: D20.30

Committee: D20

Staff Manager: Alyson Fick

Work Item Status

Date Initiated: 01-27-2024

Technical Contact: Brian Bushey