A Brief Analysis of Boiler Furnace Manufacturing Processes

The boiler furnace is a core component of the boiler, and its manufacturing process must meet the requirements of high temperature, high pressure, and complex stress. The main processes include:

1. Tube Cutting: Using CNC cutting or laser cutting to cut seamless steel pipes to the designed length, ensuring flat end faces.
2. Tube Bending: Using hydraulic or CNC bending machines to cold or hot bend water-cooled wall tubes into serpentine shapes, controlling uniform wall thickness.
3. Welding: Assembling tubes and flat steel into membrane walls by argon arc welding or submerged arc welding. Welds require non-destructive testing (such as ultrasonic testing).
4. Tube Expansion: Hydraulically expanding tubes to connect them to headers, ensuring sealing and strength.
5. Turning and Milling: Machining header connection surfaces or tube end chamfers to ensure assembly accuracy.
6. Surface Treatment: Shot blasting or spraying wear-resistant and corrosion-resistant coatings to improve corrosion resistance.
7. Heat Treatment: Annealing or normalizing to eliminate welding stress and improve material properties.
8. CNC Machining: Using CNC equipment to machine complex hole systems or interfaces to improve accuracy.

These processes must be combined with non-destructive testing and strict quality control to ensure that the furnace is resistant to high temperatures, corrosion, and structural stability. Modern manufacturing emphasizes CNC technology and automation to improve efficiency and accuracy, meeting the stringent requirements of high-pressure boilers.