Detailed classification of special equipment

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This post was last edited by huanghong on 2023-12-15 07:48. I. Classification of boilers 1. Classification by purpose (1) Power station boilers (2) Industrial boilers (3) Domestic boilers (4) Locomotive boilers (5) Ship boilers 2. Classification by capacity (1) Large boilers (rated evaporation capacity ≥ 100 t/h) (2) Medium-sized boilers (rated evaporation capacity of 20–100 t/h) (3) Small boilers (rated evaporation capacity ≤ 20 t/h) 3. Classification by outlet medium pressure (1) Low-pressure boilers (rated steam pressure ≤ 2.45 MPa) (2) Medium-pressure boilers (rated steam pressure of 3.83 MPa) (3) High-pressure boilers (rated steam pressure of 9.81 MPa) (4) Ultra-high-pressure boilers (rated steam pressure of 13.7 MPa) (5) Subcritical-pressure boilers (rated steam pressure of 16.7 MPa) (6) Supercritical-pressure boilers (rated steam pressure ≥ 22.1 MPa, usually 25.5 MPa) (7) Ultra-supercritical-pressure boilers (rated steam pressure of 30.0 MPa) 4. Classification according to safety and technical inspection regulations: Class A boilers Class A boilers refer to those with a rated working pressure P (gauge pressure, the same below) of ≥ 3.8 MPa, including: (1) Supercritical boilers, those with P ≥ 22.1 MPa； (2) Subcritical boilers, 16.7MPa≤P＜22.1MPa ； (3) Ultra-high pressure boilers, 13.7 MPa ≤ P < 16.7 MPa ； (4) High-pressure boilers, 9.8MPa≤P＜13.7MPa ； (5) Sub-high-pressure boilers, 5.3MPa≤P＜9.8MPa ； (6) Medium-pressure boilers, 3.8MPa≤P＜5.3MPa. Class B boilers (1) Steam boilers, 0.8MPa＜P＜3.8MPa ； (2) Hot water boilers, P＜3.8MPa and rated outlet temperature t≥120℃ ； (3) Vapor-type organic heat carrier boilers, with a rated thermal power of Q > 0.7 MW ； Liquid-phase organic heat carrier boilers, with a rated thermal power of Q > 4.2 MW. Class C boilers (1): Steam boilers with P≤0.8 MPa and a designed normal water level volume V>50 L ； (2) Hot water boilers, P＜3.8MPa and rated outlet temperature t＜120℃ ； (3) Gaseous organic heat carrier boilers for organic heat carrier boilers, 0.1MW < rated thermal power Q ≤ 0.7MW ； Liquid-phase organic heat carrier boilers, with a rated heat output of 0.1MW＜Q≤4.2MW. Class D boilers (1): Steam boilers with P≤0.8 MPa and a designed normal water level volume of 30 L ≤ V ≤ 50 L ； (2) Boilers that can be used for both steam and water production (Note 1), with P≤0.04MPa and a rated evaporation capacity of D≤0.5t/h ； (3) Hot water boilers powered solely by tap water pressure, with a rated outlet temperature of t≤95℃ ； (4) Vapor-type organic heat carrier boilers for organic heat carrier boilers, 0.01MW＜rated heat power Q≤0.1MW ； Liquid-phase organic heat carrier boilers, with a rated thermal power of 0.01MW＜Q≤0.1MW. Note: Other dual-purpose steam and water boilers are classified into the above categories according to their outlet steam parameters and rated evaporation capacity. II. Classification of pressure vessels 1. Classification by pressure (1) Low-pressure vessels (code L), 0.1MPa ≤ p