Work Item
ASTM WK68370

Revision of C1639-19 Standard Specification for Fabrication Of Cellular Glass Pipe And Tubing Insulation


A comment on the last ballot item for this standard pointed out that Permeance, rather than Permeability would be more appropriate to describe the water vapor transmission properties of the insulation joint adhesive. The task group discussed this and agreed to ballot the change from Permeability to Permeance. An adhesive permeance limit of 0.1 perm (5.7 ng/Pasm2) was agreed upon by the task group.


Developed by Subcommittee: C16.40

Committee: C16

Staff Manager: Mary Mikolajewski

Work Item Status

Date Initiated: 05-20-2019

Technical Contact: Cassandra Popovski

Item: 000