Manufacturing method of ultra-low carbon L360QH seamless steel pipe for hydrogen transmission

The invention discloses a manufacturing method of an ultra-low carbon L360QH seamless steel pipe for hydrogen transmission. The seamless steel pipe comprises the following chemical components in percentage by mass: 0.05 to 0.07 percent of C, 0.25 to 0.35 percent of Si, 1.15 to 1.22 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.003 percent of S, 0.18 to 0.28 percent of Cr, 0.10 to 0.15 percent of Mo, 0.02 to 0.04 percent of V, 0.01 to 0.02 percent of Ti and the balance of Fe and inevitable impurities. The manufacturing method comprises the steps of pipe blank heating, perforating, continuous rolling, sizing, cooling, saw cutting, heat treatment, flaw detection, water pressure detection, manual inspection and detection analysis. The steel pipe manufactured by the method is excellent in various properties. 本发明公开了一种超低碳L360QH输氢用无缝钢管的制造方法，所述无缝钢管质量百分比的化学成分为：C 0.05-0.07％，Si 0.25-0.35％，Mn1.15-1.22％，P≤0.010％，S≤0.003％，Cr 0.18-0.28％，Mo 0.10-0.15％，V0.02-0.04％，Ti 0.01-0.02％，其余为Fe及不可避免的杂质；