Air Storage Tank is a special equipment which is used to store compressed air and make the pressure steady. There are high, low and atmospheric pressure air storage tanks according to the different Max Operate Pressure. Compressed air storage tank is a welding cylinder what is made by carbon steel. The major material of sheel and head is SA-414. Most of the welding seam was welded by Automatic Submerged (ARC) Machine The air storage tank should be connect with the air compressor. They not only can store the compressed air and decrease the pressure impulse to make the pressure steady, but also reduce the air temperature to decrease the loading of filter and dryer.