For lack of information about better solutions, some HRSG operators are unknowingly employing unsafe or outdated practices for sealing of HRSG Drum Manways. This occurs particularly in their high energy steam drums. Over the past few decades the power industry has seen numerous incidents of spiral wound gasket failures on High Pressure Drum manway systems resulting in injury, loss of life and significant property damage.
Ensuring safe and reliable operation of your HRSG is of critical importance and Nooter/Eriksen is able to support this effort with simple and inexpensive modifications to this most critical component. By evaluating the drum manway as a complete engineered system instead of a series of individual components, Nooter/Eriksen offers a combination of specialized hardware packaged with a proven installation procedure that removes the need to hot torque and reduces the likelihood of forced outages due to cycling related leaks. Appropriate second generation “Steel-trap” gasket types designed specifically with sealing of a drum manway in mind, provide a reliable seal against the unique requirements presented with sealing elliptical manway doors. When packaged with live-loaded Disc Spring Washer stacks, N/E was able to engineer a system that provides a reliable seal even under daily cyclic operation.