Classification of Boilers

According the "ASME Boiler and Pressure Vessel Code" boilers may be classified as

Section I Power Boilers - process boilers, power boilers and high pressure boilers

• boilers in which steam or other vapor is generated at a pressures exceeding 15 psig
• high temperature water boilers intended for operation at pressures exceeding 160 psig and or temperatures exceeding 250 degrees F

Section IV Heating Boilers - commercial boilers, industrial boilers, heating boilers, low pressure boilers

• boilers in which steam or other vapor is generated at a pressures not exceeding 15 psig
• high temperature water boilers intended for operation at pressures not exceeding 160 psig and or temperatures exceeding 250 degrees F

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