WORLDWIDE IN-SITU MACHINING SERVICES IN-SITU LASER CLADDING & MACHINING FOR SHANGHAI STEAM PLANT SIEMENS THDF125/67 TURBINE VALVE CASING ASSEMBLY RENEWAL Creating innovative in-place machining solutions that minimize asset downtime and repair costs is what Goltens is known for and has been doing for over 75 years. So when Shanghai Waigaoqiao Power Plant II approached Goltens for an in-place solution to recondition steam valve seats, Goltens stepped up to the challenge. The plant’s two 900 MW Siemens THDF 125/67 coal-fired supercritical thermal units each had two HPSV, HPCV, ISV and ICV valve seats that required renewal. The challenge was to machine the original material and remetal the seats in-place prior to machining the

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