Category: Nitrous Oxide

The Department of Transportation (DOT) and Transport Canada (TC) require that cylinders made in compliance to their specifications be marked on the crown with certain information. Over the years the format used by Catalina Cylinders and Catalina East Division to display these markings has changed a few times. Shown below is an example of the current crown marking stamped on the standard 10 # N2O cylinders manufactured at Catalina Cylinders, Garden Grove, CA. Under the example of the crown marking is a list of each of the specific crown markings, followed by a brief explanation of that marking. The descriptions of the markings are the same regardless of the different stamping formats used over the years.

Example of crown markings on a 10# N2O Cylinder:

DOT-3AL1800 ELXXXXXXX M4002 MMCYY NO10 U18 TC-3ALM124 CATALINA