ABSTRACT
Fatigue cracks are found to appear in welded steel tubular joints of offshore structures during their service life necessitating costly repairs and maintenance. Two unstiffened and seven internally ring stiffened steel tubular joints were tested under constant amplitude (CA) corrosion fatigue at the seawave frequency of 0.2 Hz. The chord and the brace diameters of the joints were 320 mm and 220 mm respectively. The studies were made with respect to tropical environment similar to Indian offshore. The corrosion fatigue life, crack initiation and crack growth data obtained during the tests are discussed in this paper.
