69 Avion wrote:
I believe that there is a difference between a DOT tank and an ASME tank as far as certification goes.
I encourage everyone to google "The National Propane Gas Association"
The following is my understanding:
Q. What does the Code require?
A. For propane cylinders* in the 4 lb. through 40 lb. propane capacity range, the Code requires for them to be equipped with an OPD, as follows: New cylinders for vapor service which are fabricated after September 30, 1998; as cylinders are requalified after September 30, 1998 through March 31, 2002; effective April 1, 2002, before a cylinder is filled.
*All references to "cylinders" applies to only those in the 4 lb. through 40 lb. propane capacity range. Also, the last page of this document contains information on the service life and inspection of cylinders.