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  1. TMBeau

    A182 Grade F92 UNS Designation

    Does anyone know the UNS designation for A182 grade F92 material? Thanks, Tom B
  2. TMBeau

    API vs. B16.34 valve specifications

    I have several quetions: 1. Does the API valve standard cover pressure seal bonnet valves? 2. It appears that API standards do not cover globe valves. Is this true and if yes, why? 3. What is the maximum ASME class allowed by API? I know for B16.34 code valves, the maximum is class 4500 4...
  3. TMBeau

    High Pressure Valve Vendors

    Try Flowserve and look at their Edward brand of valves.
  4. TMBeau

    Main steam pipe material in high-temp coal power plants

    Thanks everyone! For davefitz - I am not aware of any modern applications of main steam piping using austenitic (304, 347) stainless steel by site or plant name but I have been reading countless white papars that claim the US prefers austenitic over ferritic stainless steels (P91, P92) because...
  5. TMBeau

    Main steam pipe material in high-temp coal power plants

    I have been doing some research on coal-fired super-critical and ultra-super-critical power plants (steam temperature and pressure >565C and 250Bar). It seems that for the non USA market, the materials of choice for main steam pipes/headers are A182 Gr P91 and P92 but in the USA the materials...

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