Expired cylinder can explode any time once the expiration date elapses and that makes it a time bomb. Each gas cylinder’s Expiring date is coded on the side of the cylinder in alphabetical order. A,B,C,D in quarters.
A is for March, 1st Qtr
B is for June, 2nd Qtr
C is for Sept, 3rd Qtr
D is for Dec, 4th Qtr
There are some two digit numbers that follows. Example: D06. So if you have D06 on your cylinder, it means that it has expired Dec 2006, and if it is A20, it is going to expire in March 2020.
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