LPG gas cylinder's expiry date

Please communicate this information to your family and friends. Have U ever heard about LPG gas cylinder's expiry date....!! Do you know that there is an expiry date (physical life) for LPG cylinders? Expired Cylinders are not safe for use and may cause accidents. In this regard, please be cautious at the time of accepting any LPG cylinder from the vendor. Here is how we can check the expiry of LPG cylinders:   The second example with D13 allows the cylinder to be in use until Dec 2013.