... --500bar Certificate: T PED, TUV,DOT The Seamless Aluminum Alloy Gas Cylinder was applied in the industry of chemical, electronic, medical,food ... and beveragem,etcThe Seamless Aluminum Alloy Gas Cylinder is made of superior quality aluminum alloy 6061 and manufactured through the procedures of ... mining fields, which is the ideal substitute for the steel cylinder. Aluminum Alloy Gas Cylinder