How Long Do Propane Tanks Last? Lifespan, Recertification & Care
DOT portable propane cylinders run on a federal clock under 49 CFR Part 180: 12 years from the manufacture date stamped on the collar, then 5 years for an external visual requalification (marked E), about 7 for a proof pressure test (marked S), or 12 more for a volumetric expansion test. ASME stationary tanks have no federal requalification interval and commonly last 30 years or more above ground, or 20 to 30 underground with working cathodic protection. Corrosion, not age, retires most tanks.
Propane Tank Safety: 10 Essential Tips Every Owner Should Know
Ten propane safety practices every tank owner should know, starting with the exact emergency procedure if you smell the ethyl mercaptan odorant: no flames, no switches or phones, evacuate, shut off the supply valve only if safe, then call 911 and your supplier from a distance. Also covers odorant fade, never using cylinders indoors, the 80 percent fill rule, ice and vegetation clearance, post-flood inspections, CO alarms, light-colored paint, and professional leak checks under NFPA 58.