SOP 4.8: Cylinder or Tank Evacuation and Valve Removal

Cylinders containing pressurized product can be shipped for disposal without draining contents. Five- through 55-gallon (e.g., UN1A2 metal, UN1H2 poly) containers or DOT cubic yard boxes are acceptable for cylinder containers with attached valves (not punctured); see SOP 4.4 Waste Packaging. ................
................