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  1. ruthi

    CODE CASE 2418 for S32101 Material

    Hi All, Can anyone provide a copy of code case 2418 or suggest where I could find one? Is it true that ASME provides code cases for free to all the code users? Did anyone experience strength welding S32101 tubes to c/stl clad with S32101 tubesheet? This is the first time we are trying to use...
  2. ruthi

    For Exchangers built before 98 Old allowable or New allowable

    HI All, The exchanger that I am working on is built in 78. we are supplying exchanger less heads. Channels will be reused. My question is, do we have to design this unit using old alloable stresses or new. My understanding is if we are doing only part of the unit then anything that is built...
  3. ruthi

    ANSI flanges as girth flanges

    Hi All, Can we use ANSI flanges as girth flanges for heat exchangers with more than one pass? Can you also specify where in code does it say whether we can or can not use ANSI flanges as girth flanges. Any help is appreciated.
  4. ruthi

    Section II, Part D Theramal expansion values

    Thermal expansion coefficient for 90Cu-10Ni in section II Part D, Table TE-3 has a value of 9.5 at 550 F. The table doesn’t show values at other temperatures and neither does TEMA. How do we evaluate differential expansion of tubes at different temperatures other than 550 F? Any help is appreciated.

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