... gas, standard gas, mixture gas and liquefied gas, such as high purity He, Ar, H2, CO2, CO, C3H8, O2, CH4, ... your good company ! Product Chemical formula Purity Filling pressure Valve ApplicationOxygenO299.9%150 bar/200 barQF-2Steel cutting, welding, flame ... industry, metallurgy , and electric industry99.999%150 bar/200 barArgonAr99.9%150 bar/200 barFemaleWelding arc welding, stainless steel smelting, ...