Have all container data stamped into the body or collar (neck ring) of the container
Are made of steel or aluminum
Must be retested for use according to DOT specifications
DOT (ICC) container capacities are expressed in the amount of propane in pounds they can contain The container markings on a DOT cylinder can be found permanently stamped into the container collar, neck ring or on the cylinder body. Occasionally a metal plate will carry this information, much like the ASME tank data plate, and will be attached to the body of the DOT cylinder. Information required for DOT (ICC) cylinders is:
DESIGN OR MANUFACTURE CODE
WATER CAPACITY
TARE WEIGHT
RETEST DATE
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