X42 straight seam steel pipe Hebei Pu Hao Pipe Co., Ltd. (http://www.360zhifeng.com) The company mainly produces straight seam steel pipe, welded steel pipe, welded pipe, high-frequency welded pipe, SAW steel pipe, straight seam resistance welding pipes for ω ( Longitudinal Als ≤ 0.01%, the VD using two deoxidizer total oxygen in steel after treatment has little effect can be ω (TO controlled at 20 × 10-6 less; Si-Al-Ba deoxidation in various step can be a low total oxygen content, the process of deoxidation effect is stronger than Si-Ca deoxidizing effect. Longitudinal using Si-Ca and Si-Al-Ba two different deoxidizing agent, the smelting process inclusions quantity, size has a large difference, Si-Al-Ba deoxidation inclusions each step is less than the number of Si-Ca oxygen, and the size is small. Longitudinal using Si-Ca and Si-Al-Ba two kinds Different deoxidizer, the molten steel in the casting process have undergone significant secondary oxidation, but the Si-Al-Ba deoxidation of liquid steel reoxidation more serious. forgings inclusions composition and content of aluminum inclusions larger difference , the use of Si-Al-Ba deoxidation inclusions forgings to block and chain alumina-based, Longitudinal using Si-Ca deoxidation inclusions in forgings mainly for the strip manganese aluminate complex inclusions things; Si-Ca alloy forgings deoxidation inclusions in aluminum content is less than Si-Al-Ba alloy deoxy.