The steam drum is the key interface between water and steam in a boiler system. It connects to the downcomers and water wall panels to complete the natural circulation loop.
Inside the drum, steam and water are separated and the steam is purified before being delivered to the superheater or main steam line.

Due to its central role and high-pressure environment, the steam drum operates under extremely complex conditions.

Any failure can result in serious safety consequences, so strict control over material selection, welding quality, and manufacturing process is required.

ORL manufactures steam drums according to international pressure vessel standards, applying advanced forming, welding, and testing technologies to ensure strength, integrity, and long service life.

The choice of steam drum materials depends on the working pressure, temperature, and corrosion environment. Common grades include:

• SA516 Gr70: High-strength carbon steel for pressure vessels and drum shells
• P235GH / P265GH / P295GH / P355GH: EN-standard boiler steels with good weldability and pressure resistance
• 16Mo3: Molybdenum alloy steel for high-temperature use in European systems
• 15NiCuMoNb5-6-4: High-strength, nickel-containing steel used in heavy-duty drums
• Q245R / 16MnR: Chinese pressure vessel steels widely used in domestic boilers