Note the data used to populate ¿Approval Search¿ is being reconfigured into a new document management system and as a result some of the data posted may be a few weeks out of date. We anticipate that the search feature will be up-to-date by mid-March. If you need information concerning application status that is not available in this search, please contact: PHMSA Approvals@dot.gov or call 202/366-3987. We apologize for any inconvenience.
(Note approved by the Office of Special Permits and Approvals)

The following is a list of procedures and applications related to Cylinders.

The following Federal Register postings are cylindar-related and primarily consist of NPRMs, Final Rules, and Safety Advisory Notices within the last 5 years.