Classifications of Boilers

Classification of boilers according ASME Boiler and Pressure Vessel Code

Class I Boilers - process boilers, power boilers and high pressure boilers

Steam boilers with pressure greater than 15 Psig
Hot water boilers where pressure greater than 160 Psig and/or temperature greater than 250^oF

Class IV Boilers - commercial boilers, industrial boilers, heating boilers, low pressure boilers

Steam boilers with pressure less than 15 Psig
Hot water boilers where pressure less than 160 Psig and temperature less than 250^oF

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