Test System Development and Experimental Study on the Fatigue of a Full-Scale Steel Catenary Riser

This paper presents a full-scale deep-water steel catenary riser fatigue test system. The proposed system can carry out tests on risers, hoses, and subsea pipelines up to 21 m in length, ranging from 8 24 inches diameter. was realized by mechanical loading with control systems, could axial tension compression, bending moment, torsion, internal pressure simulate all load types risers or pipelines. counterforce sustained frame. Through simulation analysis, the authors determined size of frame designed connection form According required capacity, appropriate cylinder thickness diameter were obtained through calculation. After design construction system, confirm capacity accuracy performed testing assess performance pipe-to-pipe mainline 5G girth welds fabricated BS 7608. according stress level Lingshui 17-2 gas field, results compared calculation S–N curve.