Seamless steel pipes for low and medium pressure boilers: used to manufacture various low and medium pressure boilers, superheated steam pipes, boiling water pipes, water-cooled wall pipes and superheated steam pipes for locomotive boilers, large smoke pipes, small smoke pipes and arch brick pipes, etc. Hot-rolled or cold-rolled (dialed) seamless steel pipes are made of high-quality carbon structural steel. Mainly made of No. 10.20 steel, in addition to ensuring the chemical composition and mechanical properties, hydrostatic testing, curling, flaring, flattening and other tests are also required. Hot-rolled products are delivered in a hot-rolled state. Cold-rolled (rolled) products are delivered in a heat-treated state.
High-pressure boiler steel pipes: mainly used to manufacture high-quality carbon structural steel, alloy structural steel and stainless heat-resistant steel seamless steel pipes for steam boiler pipes of high pressure and above. These boiler pipes are designed to work under high temperature and pressure. .Pipes will also undergo oxidation and corrosion under the action of high-temperature flue gas and water vapor. Therefore, steel pipes are required to have high lasting strength, high oxidation resistance, and good organizational stability. The steel grades used are: high-quality carbon Plain structural steel grades include 20G., 20MnG., 25MnG; alloy structural steel grades: 15MoG., 20MoG., 12CrMoG., 15CrMoG, 12Cr2MoG, 12CrMoVG., 12Cr3MoVSiTiB, etc.
