Purpose: This recommended practice pertains to the design@ selection@ and operation of equipment for marine riser systems for floating drilling operations. Its purpose is to serve as a reference for designers and those responsible for the selection of system components. It relies on basic engineering principles and the accumulated experience of offshore operators@ contractors@ and manufacturers. It should be noted that technology is advancing rapidly in this field and that improved methods and equipment are continually evolving. The user is encouraged to take advantage of current proven technology made available through the technical journals and equipment manufacturers.