The invention discloses an X52 seamless pipeline steel
pipe with sour
corrosion resistance and a manufacturing method of the X52 seamless pipeline steel
pipe. The X52 seamless pipeline steel
pipe comprises, by weight percent, 0.08%-0.16% of C, 0.15%-0.35% of Si, 1.0%-1.6% of Mn, 0.021%-0.05% of Al, 0.03%-0.049% of V, 0.21%-0.30% of Cu, 0.21%-0.30% of Ni, smaller than or equal to 0.015% of P, smaller than or equal to 0.005% of S, and the balance iron and inevitable impurities. When C is smaller than or equal to 0.12%, the carbon equivalent CEPcm is smaller than or equal to 0.25%, and when C is larger than 0.12%, CEIIW is smaller than or equal to 0.43. A
continuous rolling method is adopted in the manufacturing method of the seamless pipeline steel pipe, in other words, a pipe blank obtained after
continuous casting and
continuous rolling is heated to 1,200 DEG C-1,300 DEG C through an annular furnace, the temperature ranges from 1,190 DEG C to 1,240 DEG C after
punching, and the
sizing temperature is controlled to range 820 DEG C to 850 DEG C. The seamless steel pipe is high in economical efficiency and good in
corrosion resistance and can be widely applied to the fields of oil and gas well pipeline pipes in the sour
corrosion environment and the like.