A steam boiler is closed vessel in which water, is transformed into steam by application of heat in under pressure condition. Classification of steam boiler generally can be seen here and based on pressure can be classified as:
§ High Pressure Steam Boiler
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| Fig 1: HP Steam Boiler |
A high pressure steam boiler is boiler in which steam is generated at pressure exceeding 15 psig and operates hot water boiler above 160 psig or 250o F. Application this type usually is used for utility plants, big industrial plants and process application. A high pressure steam boiler can be named as Power Boiler, in which design and construction rule following to rules of ASME Boiler and Pressure Vessel Code Section I – Power Boiler.
§ Low Pressure Steam Boiler
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| Fig.2 : LP Steam Boiler (source: triadboiler.com) |
A low pressure steam boiler is defined as a boiler in which steam or other vapor is generated at pressure less than 15 psig or in which hot water is generated at pressure not exceeding 160 psig or temperature not exceeding 250o F. A low pressure steam boiler can be named as Heating Boiler, in which design and construction rule following to rules of ASME Boiler and Pressure Vessel Code Section IV – Heating Boiler. Low pressure steam boiler are used for generating heat for industrial use or for heating systems found in healthcare facilities, apartments, universities, office buildings and historic landmark building.
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