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Reheat boiler for the 1.8 million tons/year ARGG plant at XX Factory 1. Equipment name and model 1.1 Equipment name: Flue-type natural circulation supplementary combustion reheat boiler 1.2 Model: Q300/500-120-3.82/450 2. Main parameters 2.1 Boiler operating pressure, MPa: 3.82 2.2 Superheated steam temperature, °C: 450 2.3 Evaporation capacity, t/h: 120 2.4 Feedwater temperature, °C: 130 3. Scope of supply 3.1 The supply includes the boiler drum (including internal components and supports), evaporation heating surfaces, superheater, economizer, steel structure, acoustic dust collector, pipes within the boiler area, burner, and ignition control system, all in accordance with the design drawings. 3.2 Non-metallic components of the furnace wall are not included in the boiler supply scope. 3.3 Weight of main components: Boiler drum – 21.86 t; Evaporation heating surfaces – 82.01 t, of which 304 material accounts for 3.14 t; St45.8/III steel pipes – 78.7 t; Superheater – 96.61 t, of which 12Cr1Mov steel pipes account for 28.52 t and St45.8/III steel pipes account for 64.76 t; Economizer – 86.13 t, of which 12Cr1Mov steel pipes account for 82.18 t; Temperature reducer and steam collection box – 3.52 t; Steel structure – 347.73 t, of which 304 material accounts for 4.5 t and carbon steel accounts for 343.65 t; Internal pipes – 28.68 t; One set of supplementary burners; One set of acoustic dust collectors; One set of burners and ignition control systems; Packaging materials – 38.0 t. Total weight: 709 t. 3.4 Valves and instruments within the scope of the boiler shall be supplied in accordance with the design drawings. 3.4.1 The valves mainly include electric valves at the boiler outlet, emergency water-blocking electric valves for the boiler drum, electric valves for boiler exhaust steam, and safety valves on the enclosures at the outlets of the superheater and economizer; feedwater control valves are not included. 4.4.2 The instruments mainly include a set of quartz water level gauges with heating, a set of dual-color water level gauges with heating, as well as pressure gauges and thermometers inside the boiler. 4.4.3 One superheated steam and two saturated steam sampling ports, without a sampling cooler. 4.4.4 Two micro-positive pressure burners, along with an ignition system, fire suppression protection system, etc. 4.4.5 Supply the external heat exchanger header, steam header, feedwater mixing header, and feedwater distribution header required for this boiler in accordance with the drawing specifications. 5 Manufacturing and Acceptance Standards Manufacturing Senior Citizen Cooker (2002) “Regulations for Safety Inspection of Steam Boilers” GB9222-84 Calculation of Strength of Pressured Components in Water-Tube Boilers JB/T1609-93 Technical Requirements for Manufacturing Boiler Drum JB/T1610-93 Technical Requirements for Manufacturing Boiler Header JB/T1611-93 Technical Requirements for Manufacturing Boiler Tubes JB1612-83 Technical Requirements for Hydraulic Testing of Boilers JB/T1613-93 Welding Technical Requirements for Pressured Components of Boilers JB/T1620-93 Technical Requirements for Manufacturing Boiler Steel Structures JB3375-91 Inspection of Boiler Raw Materials upon Arrival at the Plant GB13311-91 Test Methods for Mechanical Properties of Welded Joints of Pressured Components in Boilers GB10866-91 Metallographic and Microstructural Test Methods for Welded Joints of Pressured Components in Boilers JB/T1615-93 Technical Requirements for Painting and Packaging of Boilers Materials GB713-96 Technical Requirements for Carbon Steels and Ordinary Low-Alloy Steel Plates Used in Boiler Manufacturing GB3087-92 Seamless Steel Tubes for Steam Boilers GB5310-92 Seamless Steel Tubes for High-Pressure Steam Boilers Flanges JB81-59 Socket Weld Flanges JB82-59 Butt Weld Flanges