Stainless steel welded pipe with excellent pipe processability and manufacturing method thereof

The invention relates to a stainless steel welded pipe with excellent pipe processability and a manufacturing method thereof. The stainless steel welded pipe comprises the following chemical components in percentage by weight: 0.005 to 0.015 percent of C, 0.005 to 0.015 percent of N, 0.001 to 0.040 percent of P, 0.0005 to 0.030 percent of S, 10.0 to 19.0 percent of Cr, 0.10 to 1.0 percent of Mn, 0.10 to 1.0 percent of Si, 0.05 to 1.50 percent of Mo, 0.05 to 0.60 percent of Cu, 0.001 to 0.020 percent of Al, 0.005 to 0.10 percent of Zr, 0.0003 to 0.0030 percent of B, 0.01 to 0.15 percent of Ce, less than or equal to 0.20 percent of Ni, 0.08 to 0.50 percent of Ti, 0.08 to 0.50 percent of Nb, less than or equal to 0.80 percent and more than or equal to 8*(C+N) of Ti+Nb, less than or equal to 0.60 percent and more than or equal to 8*(C+N) or less than or equal to 0.70 percent and more than or equal to 8*(C+N) of Ti+0.5Nb, and the balance of Fe and inevitable impurities. The stainless steel welded pipe has a single ferritic structure and has an excellent weld joint structure; the width of the weld joint is controlled to be within 50 to 150 percent of the thickness of the plate; the flaring rate of the welded pipe is over 40 percent; the pipe expanding rate reaches 40 to 110 percent; and the pipe processing requirements such as pipe bending, flaring, pipe expanding and the like are completely met.