VIBRATION REDUCING PIPING

摘要

PROBLEM TO BE SOLVED: To dispense with the use of a vibration damper in effectively suppressing bending vibration which permeates piping. SOLUTION: The center of piping is formed in a 1.5 spiral shape (twist angle 20 deg.). A piping shape whose bending vibration suppressing effect is maximum, is in a case where an angleθof a circular flat surface and a vibrating direction is 45 deg., and the ratio R/L between the radial diameter R of a bending line pipe part 13 and the length L of right and left straight line pipe parts 11, 12 is 0.8 to 1.2.