A total of three rectangular fabric expansion joints and six round fabric expansion joints were custom designed for an offshore oil extraction and natural gas project. The rectangular joints are 56" x 81" I.D. x 25" O.A.L. and the round joints are 105" dia. x 24" O.A.L. 309 stainless steel was used for the duct, 310 for the liners, 316 for the covers, 321 for the studs, 309 for the flanges. The fabric belt was a three layer belt with an inner layer of glass cloth, a layer of KO wool and an outside layer of reinforced PTFE. The expansion joints were designed for 1 psig at a temperature of 1100°F. The rectangular joints were designed for 2" axial compression, a 1" extension, and a 1" lateral offset. The round joints were designed for 4" axial compression, a 1" extension, and a 0.5" lateral offset. All welds were dye penetrant examined.