PURPOSE: To manufacture a high damping steel pipe without losing high damping characteristics by brazing both side end parts of the circularly formed high damping steel sheet intermittently at a prescribed interval.

CONSTITUTION: First, the coiled high damping steel sheet 5 which is uncoiled by an uncoiler 11 through plural stages of forming rolls 12 is formed in sequence into a circular shape to be worked in an open pipe 5A. Then, both side end parts 7, 8 of the open pipe 5A are butted by a pair of right and left push rolls 13 to form a seamed part 14 and the seamed part 14 is brazed by a brazing machine 15 at a prescribed pitch (p) to form the high damping steel pipe 5. Further, excess thicknesses 16 on the surface of the seamed part 14 are removed by a grinding machine 17 to uniformize the surface property of the high damping steel pipe 5B. The roundness of the high damping steel pipe 5B is adjusted by a sizer 18 and a continuously manufactured steel pipe 5B is cut by a cutting machine 17 in prescribed dimensions.