Chime Ring : The two raised rings circling the outer shell of DOT 5P (1A1) ethylene oxide drums. These rings protect the drum but are not intended for lifting purposes
NFPA 560 Standard for the Storage, Handling, and Use of Ethylene Oxide for Sterilization and Fumigation, 2007 ed. (Std: Storage, Hndlg, and Use of Ethylene Oxide for Sterilization and Fumigation - Amer) {333 NFC}