High-pressure boiler seamless steel pipe is a kind of boiler pipe, which has strict requirements on the steel type and process used to manufacture the steel pipe. steel grades include 20G, 20MnG, and 25MnG,15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc.