Thermal Power

A: Superheaters / Reheaters

Superheater and reheater tubes are necessary to convert wet, saturated steam into dry steam. These tube bundles are located within the combustion chamber of the boiler. voestalpine Böhler Welding offers top quality high alloyed welding consumables that, depending on the operating conditions, are required to guarantee resistance against heat and corrosion.

B: Headers

Headers are thick-walled extruded pipes in which the fluids carried by the tubes are mixed and homogenized. These heavy-section components have to meet creep strength requirements. voestalpine Böhler Welding offers welding consumables for the high-quality welding of these critical components.

C: Main steam / Hot reheat piping

Main steam and hot reheat piping are thick-walled seamless pipes which transport the dry steam from the headers to the turbine. The wall thickness of these pipes is up to 100 mm. voestalpine Böhler Welding offers the proven welding consumables necessary for this application, which is highly demanding due to the high temperature (up to 620°C) and pressure (up to 350 bar).

D: Water walls (or membrane walls)

Many kilometers of tubes and fins are welded together and form the outside wall of the boiler. Different tube and fin material is used depending on the design of the boiler, the capacity, the temperature and the pressure (e.g. T1, T12, T23, T24…). voestalpine Böhler Welding offers welding consumables for the mechanized welding of these components in SAW or GMAW/FCAW processes as well as for the tube-to-tube welds that are necessary as performed in GTAW process (manual or auto).