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  1. darshiva

    Vessel design temp over 900F

    You may start taking a look to WRC 470.
  2. darshiva

    Vessel design temp over 900F

    I think that the maximum temperature under Sec I or Sec VIII is 1200 F, not 900 F. 900 F is where the creep (time-dependent properties) starts and some considerations shall be taken regarding elastic-plastic analysis for peaking in welds, tubes and tubesheets. You can design for this temperature...
  3. darshiva

    Piping Loads on a Surface Condenser

    Bogui1900, The value are gave are typical ones, but, of course, they have to be checked considering your application. Usually these chechs are done by the condenser supplier. I suggest you contact them. If you want, I cand make some more precise numbers, but I would need some additional data...
  4. darshiva

    Piping Loads on a Surface Condenser

    Conside the maximum forces and moments as follows: NPS 4 -For in plane forces and momments: F=1334 Lb, M=6667 Lb-ft -For out of plane force and moment: F=500 Lb, M=2367 Lb-ft NPS 6 -For in plane forces and moments: F=2000 Lb, M=10000 Lb-ft -For out of plane force and moment: F=700 Lb, M=3500...
  5. darshiva

    S-Ten 1 from Nippon Steel

    Hi, guys. Does anybody have experience with S-Ten 1 from Nippon Steel applied to air heaters, ID fans or ducts working below acid dew point? Thanks in advance, Darshiva
  6. darshiva

    SA-335 347H Pipe Supplier

    And sorry, I meant SA-376 TP347H. My mistake.
  7. darshiva

    SA-335 347H Pipe Supplier

    Thanks, Metengr, but I'm afraid Vallourec does not make stainless.
  8. darshiva

    SA-335 347H Pipe Supplier

    Thanks, Stanweld, but I'm looking for manufacturers. Up to know potential suppliers coul be: -Sumitomo -Japan Steel -ThyssenKrupp Any other?
  9. darshiva

    SA-335 347H Pipe Supplier

    Hello, guys. Does anyone know potential suppliers for seamless pipe ade of SA-335 347H stainless steel up to 24" OD and 5" NWT? Regards, Darshiva
  10. darshiva

    Low NOx burners and furnace performance

    Athomas236, If there is no OFA or external FGR, most probably, oil low NOX burners are based on air staging. Typically burner will be of Venturi style or double register style. It will have a central priamry/secondary air stream going through an axial swirler and a tertiary air stream...
  11. darshiva

    Low NOx burners and furnace performance

    Athomas236, I don't think low NOx burners is the issue. Flame could be a little bit longer, but not enough to change FEGT enough to affect heat transfer in the superheater. Low NOX burners lower the peak flame temperature, but not the average flame temperature. Is thera an OFA installed? FGR...

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