I found this about the Ragasco Tanks:
There is one caveat. If that expiration date is over fifteen years from the manufacturing date that is the controlling date where the... » Read More
Hi Kathryn, The colored top has at the lowest point a date of manufacture stamped in it. The date is month and year. If you simply add 10 years to the date stamped on the cylinder that is the month and date your cylinder must be reauthorized. Now that being said if you find an oval silver label on the side with a hydrostatic recertification date on it calculate 10 years from the date of Re authorization. That is your next reauthorization due date.
There is one caveat. If that expiration date is over fifteen years from the manufacturing date that is the controlling date where the cylinder expires and can no longer be used.
Don't panic as there is the likely hood, due to the perfect safety record of these composite cylinders, that the 15 year shelf life may be increased to "unlimited". However, a visual inspection will still be required every five years. The visual inspection can be performed by any LP facility with a DOT REIN license
George P. Tyson Jr.
answered on September 6, 2013