... Tube20G,12Cr1MoVG,20MnG,25MnG,15Cr1MoVGGB53104Low and Medium Pressure Boiler Tube10,20GB30875High pressure Pipe for Fertilizer Equipment10,20,16Mn,15CrMoGB64796Petroleum Cracking Tube10,20 ... ×1-20mm in thickness. And the varieties include: Low/medium pressure boiler pipe, high pressure boiler pipe, alloy pipe, marine pipe, hollow sucker ...