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  1. Stickers

    Operating a balanced draft boiler on natural draft

    Does anyone have any experience of operating a water tube steam boiler which is normally balanced draft i.e. has FD and ID fan under natural draft only? Both our fan turbines require major repairs and I've been asked what load could be achieved out of the boiler merely under natural draft. I...
  2. Stickers

    Undersized relief valves

    Thanks Guys. Any tips for calculating what pressure the vessel would rise to? The case I'm struggling with is a fire case. This is tough since the relief load increases with falling heat of vaporization as the vessel heats up.
  3. Stickers

    Undersized relief valves

    Here's an interesting question that I've been thinking about: What would happen to the pressure in a vessel which is protected by an undersized PSV? Obviously, it would go up but to what value? For compressible choked flow, as pressure increases mass flow would increase also so, for some...

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