American BOA exhaust expansion joints are used in a variety of applications including but not limited to: land-based, stationary reciprocating engines used for power generation; propulsion engines aboard small boats and large ships; and gas turbine generators and pumps on offshore oil platforms. BOA pioneered the development of the unique multi-ply bellows design, which has proven over the years to be highly effective in absorbing both thermal expansion and vibration in engine and compressor piping systems.