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.
Work Item Status
Date Initiated: 01-27-2024
Technical Contact: Brian Bushey
Item: 002
Ballot: D20.30 (24-02)
Status: Will Reballot Item