As with most power plant equipment that experiences deterioration from continuous operation, the GE Flex Seal plates can lose their sealing capabilities and flexibility over time. As a result, excessive hot gases are released into the surrounding atmosphere, endangering critical control wiring and equipment. Cold air can also enter the turbine, reducing thermal performance.
The two-ply testable bellows (also referred to as a redundant ply design) can, in majority of cases, provide early warning about bellows failure. Although a representative sample performs in a statistically predictable way, any single expansion joint’s exact fatigue life is unpredictable.
The operation of high pressure pipeline pumps poses great challenges to end users. Strict environmental standards must be met, and the cost effectiveness and availability of the numerous pump stations must be assured. Product leakages must be prevented by all means necessary. As a result, the pump shafts are sealed with dual seals with unpressurized buffer or pressurized barrier systems.