Also, at this moment, as shown at below email, TNSC HQ has ordered us that all materials of filters and strainers on OXYGEN tubing at your all sites must be checked, then if prohibited materials have been used, they must be replaced to recommended materials, or must be inspected inside immediately.
These procedures and recommended materials are described in an attached excel file of “Checking Materials of Strainers and Filters on O2 tubing”.
This file has two sheets for Strainer and Filter.
So please plan starting the checking.