{"id":4734,"date":"2020-11-23T20:12:30","date_gmt":"2020-11-23T20:12:30","guid":{"rendered":"https:\/\/cicgroup.com\/nooter-eriksen\/?page_id=4734"},"modified":"2025-10-27T22:52:20","modified_gmt":"2025-10-27T22:52:20","slug":"design-enhancement-material-upgrade","status":"publish","type":"page","link":"https:\/\/cicgroup.com\/nooter-eriksen\/aftermarket-services\/design-enhancement-material-upgrade\/","title":{"rendered":"Design Enhancements & Material Upgrades"},"content":{"rendered":"\t\t
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Design Enhancements & Material Upgrades\n<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Design Enhancements & Material Upgrades\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Rely on our knowledge and our trusted supplier base for replacement parts. Not only can we supply OEM replacement parts such as valves, gaskets, and tubes, but also a wide range of specialty replacement parts or upgrade items. Just let us know what your needs are.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Manway System Upgrade\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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For lack of information about better solutions, some HRSG operators are unknowingly employing unsafe or outdated practices for sealing of HRSG Drum Manways.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.<\/p>

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 \u201cSteel-trap\u201d 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.<\/p><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Economizer Drain Consolidation\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Drain Modification\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Many early HRSGs designs consist of overly complicated preheater and economizer drain systems.\u00a0 In addition to causing physical access restrictions to the drain valves for routine opening and maintenance, these designs can contribute to long-term susceptibility in the heat transfer coils themselves to damage from flow bypass.\u00a0 Due to slight pressure drop as fluid passes through a heat transfer coil, the drain valves for individual headers further upstream and downstream in a coil will have slightly different pressures.\u00a0 Flow bypass occurs when two or more header drain valves in the same cluster have begun to leak by and this slight pressure variation drives bypass flow.\u00a0 Because of differences in fluid temperature at these headers, leaking drain valves has been known to contribute to localized tube failures in the coils at or near the drain locations as colder water is introduced into hotter tubes, creating localized thermally induced stresses.<\/p><\/div><\/div><\/div>

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Small Bore Leaks<\/p><\/div><\/div><\/div>

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Large Bore + Small Bore Leaks<\/p><\/div><\/div><\/div><\/div><\/div><\/div>

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NOOTER\/ERIKSEN has developed solutions for all these issues and is able to offer them as a fully inclusive drain retrofit that offers numerous advantages to the reliability of the HRSG and eases the life of the HRSG operators and maintenance personnel.<\/p>