Good times ... studying Boiler & Pressure Vessel Safety What is a pressure vessel ? A pressure vessel is a relatively high-volume pressure component (such as a spherical or cylindrical container) that has a cross section larger than the associated pipe or tubing. How Is A Boilers Kilowatt (kW) Rating Determined? The amount of heating surface determines the kilowatt rating of a boiler. • Calculate the kilowatt rating by multiplying the heating surface in square metres (m2) by 10. • 1 m2 of heating surface = 10 kW. (10 m2 = 100 kW, 100 m2 = 1000 kW, etc.) Three examples of pressure vessels commonly found in the workplace. - heating boilers, power boilers, compressed gas tanks vacuum truck tanks, compressed air tanks, and tanks containing pressurized process liquids A boiler is a type of pressure vessel that uses heat from the burning of fuel or from electricity to heat water for various purposes. Basic components of a boiler include: vessel or shell itself, series of tubes that pass through the vessel, and fuel gas-fired burner or electric element. ------------------------------------------------------------------------------------------------------------------------------------------ Low Pressure: Gas pressure less than 150psi (1MPa), or liquid pressure less than 1500psi (10MPa) Intermediate Pressure: Gas pressure from 150-3000psa (1-20MPa), or liquid pressure from 1500-5000psi (10-35MPa) High Pressure: Gas pressure greater than 3000psi (20MPa), or liquid pressure greater than 5000psi (35 MPa) Positive Pressure Vessels: must be built to withstand rupture rom the inside Negative Pressure Vessels: must be built to withstand rupture from the outside in Boilers: fuel gas fired pressure vessels; pressure is produced by heating or water or a related fluid Air Tanks, Chemical Process Vessels: unfired pressure vessels (negative/positive); pressure is created by mechanical pump etc ..........
Posted on: Thu, 27 Mar 2014 01:43:01 +0000
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