Requalification
(USA) NFPA deginitions
ASME Container (or Tank). A container constructed in
accordance with the ASME Code.
Container. Any vessel, including cylinders, tanks, portable
tanks, and cargo tanks, used for the transporting or storing of
LP-Gases.
Cylinder. A container constructed in accordance with U.S.
Department of Transportation specifications (Title 49, Code of
Federal Regulations).
2-2 Containers.
2-2.1.3* Containers shall be designed, fabricated, tested, and
marked (or stamped) in accordance with the regulations of
the U.S. Department of Transportation (DOT), the ASME
Boiler and Pressure Vessel Code, "Rules for the Construction of
Unfired Pressure Vessels," Section VIII, or the API-ASME Code
for Unfired Pressure Vessels for Petroleum Liquids and Gases, whichever
is applicable at the date of manufacture. (See Appendixes C
and D.)
2-2.1.5 Cylinders subject to the jurisdiction of DOT regulations
shall be filled, continued in service, and transported in
accordance with those regulations.
Cylinders that are built to DOT standards may be filled for 12
years from the date of manufacturer and then be subject to
requalification. NFPA 58 5.2.2
Requalification Method
Visual (per NFPA 5.2.3) 5 years
Modified Hydrostatic Test 7 years
Water-jacket Hydrostatic Test 12 years
