Caldera Pirotubular Proceso de Fabricacion.

How is a Pressure Vessel Manufactured?

Raw Material Delivery and Initial Cutting

• The manufacturing process begins with the delivery of high-quality hot rolled steel, which is unloaded and positioned for cutting.

• A computer-controlled plasma arc cutting torch precisely cuts the steel into components, ensuring each piece is sized accurately for assembly.

Assembly of Tube Sheets and Shell Formation

• Tube sheets are aligned to ensure proper tube alignment; flaring adds strength to the pressure vessel.

• The flat steel is rolled to form the shell, with consistent diameter and roundness monitored throughout the rolling process.

Welding Process

• Experienced welders lay out weld paths in a vertical down position; all welds are x-rayed as per ASME code standards.

• After tacking tube sheets in place, the shell moves to a specialized welding pit where it’s aligned on turntables based on size.

Final Assembly Preparation

• Robotic welding arms maneuver above the shell while operators rotate it for efficient welding.

• The completed furnace undergoes stress relief at 1,100 degrees Fahrenheit while other components like electrical parts are tested.

Hydrostatic Testing and Insulation

• Once assembled, the pressure vessel undergoes hydrostatic testing by being filled with water and pressurized to 1.5 times its design pressure.

• Insulation layers are added before covering with sheet metal, marking significant progress towards boiler completion.

Final Touches and Quality Assurance

• Skids are attached, lagging completed, and electrical components installed; this ensures compatibility between burner and boiler for efficiency.

• Each boiler undergoes test firing where gauges and valves are checked for combustion control accuracy before painting.