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Shell boilers are often operated with feedwater temperatures lower than 100°C. Consequently the boiler is required to supply enthalpy to bring the water up to boiling point. Most boilers operate at pressures higher than atmospheric because steam at an elevated pressure carries more heat energy than does steam
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The pressure onto the steam traps is 12 bar g with a total condensate flow of 2500 kg/h. The flash steam from the vessel is to be supplied to equipment using low pressure steam at 1 bar g. Method: From the Pressure on steam traps axis at 12 bar g move horizontally to the 1 bar g flashsteam pressure
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(PDF) Steam Boiler - ResearchGate27 Sep 2017 PDF | A steam boiler is a closed vessel generally made of steel in which Boilers can be classified in a number of ways but the following are important from the As fire is present insides the tubes hence it is called as fire The direction of the water circulation is not well defined i.e. a ...
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For steam boilers a small overpressure is required usually 3% or 5%. For most other applications 10% overpressure is required but according to API 520 for special applications such as fire protection larger valves with overpressures of 20% are allowed.