Oxygen tanks are used for several different purposes. You will find oxygen tanks used for welding, first aid and scuba diving. The cylinders used to store the oxygen come in different sizes, depending on what you are using it for. Certain sizes of tanks are more frequently used; aluminum tanks are generally preferred as they are lighter than steel tanks.
An M2 oxygen cylinder is 5.3 inches tall and has a diameter of 2.5 inches. This is the smallest and lightest oxygen tank used for medical oxygen delivery.
M4 aluminum cylinders are 3.21 inches in diameter and 9 inches tall. This has a 2,216 psi, 4 cubic feet of oxygen capacity; it weighs 1.9 lbs. when it is empty.
The aluminum ML6 is 4.3 inches in diameter and 7.5 inches tall. It has a 2,015 psi, 5.8 cubic feet oxygen capacity; it weighs 2.8 lbs. when empty.
D cylinders are 4.3 inches in diameter and 16.5 inches tall. The internal pressure is 2,015 psi. You can hold 14.6 cubic feet of oxygen in these tanks. When empty the aluminum D cylinder weighs 4.9 lbs.
JD stands for "Jumbo D." JD aluminum cylinders are 5.3 inches in diameter and16.5 inches tall. These cylinders have a psi of 2,216 and oxygen capacity is 22.9 cubic feet. It weighs 8.9 lbs. when it is empty.
E cylinders are 4.3 inches in diameter and 25.5 inches in height. You will find 2,015 psi in the E cylinder and 24.1 cubic feet oxygen capacity. When empty, it weighs 10.2 lbs.
M60 cylinders measure 7.3 inches in diameter and 23 inches tall. M60 tanks have a service pressure of 2,216 psi and 60.9 cubic feet of oxygen capacity. The empty weight is 23.44 lbs.
MM is the largest of the oxygen tanks. There is a 2,216 psi and 121.9 cubic feet of oxygen capacity. This measures 8 inches for the diameter and 36.3 inches tall. When you empty this cylinder, it still weighs 46.95 lbs.
Store oxygen tanks away from gas tanks and open flames. Always secure the cylinders when you are transporting them. Use care when handling and storing them. Always turn them off when they are not in use. Although oxygen isn't toxic, you shouldn't breath in pure oxygen for long unless prescribed by a doctor; oxygen can help fuel other gases if ignited.